Why This Guide Matters: Government contracts are among the largest sources of business in India — from a small electrician doing CPWD repairs to a large company building a highway for NHAI. Yet GST on government transactions remains one of the most misunderstood areas: which transactions are exempt? Who pays — government or contractor? When does RCM apply? What is TDS under Section 51? How did the September 2025 rate rationalization change works contract rates? This guide answers all of it with current, verified information.
1. Who Qualifies as “Government” Under GST? — Definitions
The CGST Act 2017 uses multiple defined terms for government entities — and the distinctions matter enormously for GST treatment:
| Term |
Definition |
Examples |
| Central Government § 2(53) CGST |
The Union of India, including ministries, departments, and attached/subordinate offices |
Ministry of Finance, CBIC, MCA, Central Secretariat, CPWD, CBI |
| State Government § 2(103) CGST |
State executive + departments and offices under state administration |
PWD Delhi, State Transport Dept, Agriculture Dept |
| Local Authority § 2(69) CGST |
Municipal corporations, panchayats, cantonment boards, development authorities |
MCD, NDMC, NMMC, Panchayati Raj bodies, State Development Authorities |
| Governmental Authority NN 12/2017, Explanation |
Authority or board set up by govt. for stated function of government, with 90%+ equity/control |
NHAI, AIIMS (autonomous but government-funded), some irrigation authorities |
| Government Entity NN 12/2017, Explanation |
Authority, board, or body set up by government with 51%+ government equity/control |
PSUs (ONGC, BHEL, BEL), airport authorities, port trusts, most statutory bodies |
| PSU (Public Sector Undertaking) |
Company owned 51%+ by Central/State Government |
SAIL, GAIL, Indian Oil, NTPC, BSNL, MTNL, Air India |
Why definitions matter: The GST exemption for “pure services to Central/State Government/Local Authority” under NN 12/2017 Entry 3 covers a narrow list. It does NOT automatically extend to “Governmental Authority” or “Government Entity” unless specifically mentioned in the notification. Getting this wrong causes ITC mismatches, demand notices, and litigation.
2. The Three-Layer Framework: Sovereign → Exempt → Taxable
All government-related transactions under GST fall into one of three buckets. Understanding this hierarchy is the foundation of compliance:
| Layer |
What It Covers |
GST Treatment |
Legal Basis |
| Layer 1: Sovereign Activities |
Constitutional/governmental functions — legislation, policing, defence, judiciary, collection of taxes |
Not a “supply” — GST does not apply at all |
Schedule III, § 7(2)(a) CGST Act |
| Layer 2: Exempt Services |
Government services to citizens/business that are specifically listed as exempt |
Supply exists but no tax — exempt under notification |
NN 12/2017-CT(R) as amended |
| Layer 3: Taxable Transactions |
Commercial activities by government; services TO government by contractors; renting of property; works contracts |
Full GST applies — either forward charge or RCM |
§ 7(1) CGST Act; NN 11/2017-CT(R) and others |
3. Schedule III: Activities NOT a Supply — Sovereign Functions
Schedule III of the CGST Act lists activities that are neither supply of goods nor supply of services — they are outside the GST net completely. For government transactions, the relevant entries are:
- Entry 4: Services by an employee to employer in the course of employment (applicable when government servants perform their duties — their salaries are not GST supplies)
- Entry 5: Duties performed by constitutional authorities like Comptroller & Auditor General, President, Governors — not a supply
- Entry 7 (inserted by Finance Act 2021, retrospective from 1 July 2017): Supply of goods from customs-bonded warehouse before home-clearance (relevant for port transactions)
Sovereign Functions — Not Subject to GST:
The following government activities do NOT attract GST because they are the exercise of sovereign/constitutional power, not a “supply” under GST:
- Collection of taxes (income tax, customs, property tax)
- Legislation (Parliament/state assemblies passing laws)
- Policing and law enforcement
- Judiciary (courts, tribunals)
- Defence and armed forces operations
- Issuing passports, driving licences, certificates — where these are statutory requirements
- Fines, penalties, forfeitures imposed under law
The distinction between sovereign function and commercial activity becomes important when a government entity earns revenue from activities that resemble business — renting property, running shops in government buildings, charging for parking, etc. These are NOT sovereign and attract GST.
4. GST Exemptions on Government Services — Key Notification 12/2017 Entries
Notification No. 12/2017-CT(R) (as amended) provides specific exemptions for government services. Key entries:
| Entry |
Service |
By Whom |
To Whom |
Exemption? |
| Entry 3 |
Pure services (excluding works contract or supply of goods) for constitutional/statutory function |
Any supplier |
Central/State Govt, UT, local authority |
✅ EXEMPT |
| Entry 3A |
Composite supply of goods + services where value of goods ≤ 25% of total — for constitutional/statutory functions |
Any supplier |
Central/State Govt, UT, local authority |
✅ EXEMPT |
| Entry 4 |
Services by government in relation to RBI, deposit insurance, regulation of financial sector, postal operations (basic) |
Government |
Any person |
✅ EXEMPT |
| Entry 5 |
Services by Central/State Government to another Central/State Government (including cantonment boards) |
Govt to Govt |
Another Govt |
✅ EXEMPT |
| Entry 9 |
Transportation of passengers by government-run transport (public bus, metro rail — where applicable) |
Government transport operator |
General public |
✅ EXEMPT |
| Entry 21B |
Services by government by way of functions pertaining to municipality under Article 243W of Constitution |
Local authority |
Any person |
✅ EXEMPT |
| Entry 22 |
Services by RBI |
Reserve Bank of India |
Government |
✅ EXEMPT |
| Entry 23 |
Services by IRDA, SEBI, PFRDA (regulatory functions) |
Regulatory bodies |
Persons under their regulation |
✅ EXEMPT |
| — |
Renting of immovable property to registered persons (commercial) |
Government/local authority |
Business entities |
❌ TAXABLE (RCM) |
⚠️ Critical distinction — Entry 3 exemption:
Entry 3 covers pure services to government for constitutional/statutory functions. Both conditions must be met. If a consultant provides strategy consulting to a PSU for a commercial project — it does NOT qualify (PSU is not “Central/State Govt” + the function is commercial not constitutional). The supplier must charge 18% GST. Getting this wrong — either not charging GST or wrong exemption claim — creates audit risk.
What is a “Constitutional/Statutory Function”?
Courts and AAR rulings have interpreted this broadly. Functions include:
- Water supply, sanitation, solid waste management (Article 243G)
- Regulation of slaughter houses, cattle pounds (local authority function)
- Public health and hospitals (state function)
- Construction of public roads, drains, bridges (governmental authority)
- Primary education, public libraries
Functions that are NOT constitutional/statutory:
- Running commercial canteens in government offices
- Operating commercial parking lots
- Renting government buildings for private events
- IT software projects for internal efficiency (even if for a government department)
5. RCM on Government Services Received by Business Entities — Section 9(3) Entry 5
When a government body, local authority, or governmental authority provides a taxable service to a business entity, the business entity (recipient) pays GST under RCM — not the government. This is Entry 5 of Notification 13/2017-CT(R).
| Parameter |
Details |
| Supplier |
Central Government, State Government, Union Territory, local authority |
| Recipient liable under RCM |
Any business entity |
| What services |
Renting of immovable property to a business entity; any taxable service not specifically exempt |
| GST Rate |
Applicable rate (18% for renting of commercial property) |
| Excluded from RCM |
Services already covered by specific exemptions (water supply, sanitation, constitutional functions, etc.) |
| Excluded from RCM |
Postal services; services relating to agriculture; passenger transport (bus/metro under exemption) |
RCM Example: Government Property Renting
Scenario: A company rents office space from MCD (Delhi Municipal Corporation) for ₹1 lakh/month. MCD does not charge GST on its rent invoice.
The company must pay 18% GST (₹18,000/month) under RCM on the rental amount. Issue self-invoice; pay via Electronic Cash Ledger; claim ITC if used for business. Annual exposure if missed: ₹2.16 lakh.
Composition scheme taxpayers and government rent (January 2025 update):
Circular 245/02/2025-GST clarified that composition scheme taxpayers are excluded from RCM liability on renting of commercial property from unregistered persons (including government entities, in applicable cases), for the period 1 October 2024 to 15 January 2025. From 16 January 2025, regular taxpayers remain liable for RCM on government property rent; composition scheme treatment is subject to specific notifications.
6. Works Contract for Government — Complete Rate Guide (Post 22 Sept 2025)
6.1 Rate Evolution: How We Got Here
| Period |
Rate for Government Works Contract |
ITC Status |
| Pre-GST (Service Tax era) |
~5% effective (abatement-based); VAT at composition |
Limited |
| July 2017 — Dec 2021 |
12% for most government construction; 18% for commercial |
Full ITC |
| Jan 2022 — Sept 2025 |
18% if awarded by “government entity/authority”; 12% if awarded by “government department/local authority” directly for specific categories |
Full ITC |
| Post 22 Sept 2025 Rate Rationalization |
18% as standard — 12% slab eliminated; specific schemes may have transitional rates |
Full ITC |
6.2 Current Rate Matrix for Government Works Contracts (Post 22 Sept 2025)
🆕 56th GST Council (3 Sept 2025) — Rate Rationalization Impact:
The 12% GST slab has been eliminated. All works contract services that were previously at 12% for government projects are now either: (a) moved to 18%, (b) specifically kept at a lower rate for qualifying schemes, or (c) retained at existing rates under specific notifications pending compensation cess review. Verify each contract under the updated notification before invoicing.
| Category of Works Contract |
Awarded By |
Rate (Post 22 Sept 2025) |
| Original works — roads, bridges, railways, metro, airport, waterway (national importance) |
Central/State Govt, UT, local authority, governmental authority |
Exempt — covered under NN 12/2017 Entry 3A (if pure service or ≤25% goods component) |
| Works contract for construction of civil structure — schools, hospitals, affordable housing for government |
Central/State Govt, UT, local authority |
18% with ITC (was 12% for some categories — now eliminated) |
| Works contract for civil structure — for PSU or government entity (not local authority) |
Government Entity (PSU, board, authority with 51%+ govt) |
18% with ITC |
| Works contract for historical monuments, archaeological sites |
Any government body |
18% with ITC |
| Repair, maintenance of government assets |
Any government body |
18% with ITC |
| PMAY (Pradhan Mantri Awas Yojana) — affordable housing for economically weaker sections |
Government / Housing Board |
Verify current notification — transitional rate may apply; 12% was applicable; post-rationalization confirm with CBIC notification |
| Works contract by sub-contractor to main contractor for government project |
Main contractor (private) |
18% always — sub-contractors charge 18% regardless of ultimate recipient |
⚠️ Critical post-rationalization issue for contractors:
If your contract with a government body was signed pre-September 22, 2025 at 12% GST — what happens to ongoing work?
Under Section 14 of CGST Act, time of supply for works contracts is determined per invoice date or payment date. If you invoice after 22 September 2025, the applicable rate is the new rate at that time — 18% — even for older contracts.
Remedy for contractors: If your contract was priced inclusive of 12% GST and now the rate has gone to 18%, you face an additional 6% burden. Review contract terms — most government contracts have a “change in law” or “force majeure” clause allowing price revision for statutory rate changes. Engage your contracting authority (PWD, NHAI, Railways) for price renegotiation citing the rate change notification.
6.3 PMAY and Affordable Housing Schemes
Works contracts for construction of low-cost housing under government schemes have historically received concessional GST rates. Following the 56th Council, these are under review:
- Affordable housing (carpet area ≤60 sqm in metropolitan cities, ≤90 sqm in others, value ≤₹45 lakh): As buyers, these were already at 1% without ITC. For contractors building such projects under government schemes, verify current rate with updated CBIC notifications post-Sept 2025.
- PMAY-Gramin (rural housing): Pure services to government for PMAY-G construction → Exempt under Entry 3 if the function qualifies as constitutional/statutory. If works contract (goods + services), may be taxable at applicable rate — confirm with circular.
- Mid-day meal programme: Works contract or composite supply for government-run mid-day meal scheme to local authority → Exempt under Entry 3A.
6.4 Sub-Contracting in Government Projects — A Major Trap
When a large company (L1 bidder) wins a government contract and sub-contracts work to smaller firms, the GST rate for the sub-contractor is 18% — regardless of the government nature of the ultimate project.
Sub-Contracting Rate Example
Scenario: NHAI awards a highway contract to ABC Infrastructure Ltd. at 18%. ABC sub-contracts civil work worth ₹5 crore to XYZ Construction.
- ABC charges NHAI: 18% GST (₹90 lakh on ₹5 crore)
- XYZ charges ABC: 18% GST (not exempt — XYZ’s recipient is ABC, not NHAI/government)
- ABC claims ITC on XYZ’s 18% invoice; net tax impact is managed through the ITC chain
- XYZ cannot claim exemption saying “I’m working on a government project” — the exemption follows the supply chain direction, not the ultimate use
Exception: If a government authority like NHAI directly awards a sub-contract to a smaller firm (not through the main contractor), then the sub-contractor is providing services directly to a government entity — rate depends on the nature of work and applicable exemption/rate for that category.
7. Indian Railways — GST Framework for Transport, Contracts & Vendors
Indian Railways is a unique entity — a government department (Ministry of Railways) that operates commercially. GST applies to its commercial services but not to its sovereign/constitutional operations.
7.1 GST on Railway Transport Services
| Service |
GST Rate |
Notes |
| Passenger transport — sleeper, 3rd class (AC/non-AC economy) |
NIL |
NN 12/2017 Entry 8 — essential public transport |
| Passenger transport — 1st AC, Executive, Vistadome |
5% |
AC first class and higher-end travel |
| Transportation of goods by Indian Railways (freight) |
5% |
No ITC to Indian Railways; ITC available to freight payer on invoice |
| Parcel/package booking by Railways |
5% |
Part of freight movement |
| Rail container transport by Indian Railways |
5% |
5% rate maintained |
| Rail container transport by PRIVATE operators (non-IR) |
18% with ITC was 12% |
Changed w.e.f. 22 Sept 2025 — was 12%; also option of 5% without ITC |
| Catering services on trains |
5% |
IRCTC-provided food on trains |
| Railway platform tickets |
NIL |
Exempt |
| Cloak room charges at railway stations |
18% |
Taxable commercial service |
7.2 GST for Vendors, Contractors & Suppliers to Railways
| Transaction |
GST Rate |
TDS by Railways? |
| Supply of goods to Railways (rails, sleepers, engines, OHE components) |
Applicable goods rate (5%–18% depending on item) |
✅ Yes — Indian Railways deducts 2% TDS under § 51 on contracts >₹2.5L |
| Works contract to Railways (track laying, station construction) |
18% (standard works contract rate) |
✅ Yes — TDS by Railways |
| IT/digital services to Railways |
18% |
✅ Yes — TDS applies |
| Security services to Railways |
18% (check if supplier is body corporate or not for RCM) |
✅ Yes |
| Consultancy to Railways (engineering, planning) |
18% |
✅ Yes |
🆕 October 2024 — e-Invoicing Exemption for Government Departments including Railways:
Government departments and local authorities are exempt from generating e-invoices on the GST portal. This means Indian Railways itself does not need to generate e-invoices for its supplies (freight, catering). However, vendors/contractors supplying TO Railways must comply with e-invoicing if their own turnover exceeds ₹5 crore.
7.3 Railway Land Licensing — GST on Licence Fees
Indian Railways licenses land to commercial entities (for retail shops at stations, hoardings, fuel pumps). These are commercial transactions — 18% GST applies. The commercial entity (licensee) may pay under RCM if the amount is for a service by a government entity, or Railways itself may charge GST.
IRCTC’s GST position: IRCTC (Indian Railway Catering and Tourism Corporation) is a PSU listed on stock exchanges. It is separately registered under GST and charges GST normally on its services — catering, tourism packages, tatkal booking convenience fees. IRCTC is NOT exempt from GST. It is treated like any other registered business for GST purposes.
8. PSU (Public Sector Undertakings) — GST Obligations & Exemptions
PSUs are commercial entities — majority government-owned but operating as businesses. For GST purposes, they are treated like any private company unless specific exemptions apply.
| Transaction |
GST Position |
| PSU sells goods/services to customers |
Normal GST — forward charge at applicable rate. No automatic exemption. |
| PSU buys from registered suppliers |
Normal GST — supplier charges, PSU claims ITC |
| PSU buys from unregistered suppliers |
Generally no § 9(4) RCM (since 2019 amendment); specific exceptions may apply |
| PSU to PSU transactions |
Normal GST applies — but TDS exempted per NN 73/2018-CT |
| PSU to government department |
Normal GST on supply; TDS exempted per NN 73/2018-CT (inter-entity exemption) |
| PSU’s internal services between units (same GSTIN) |
Not a supply; no GST |
| PSU works contract for government |
18% (standard works contract rate) |
| ONGC/IOC/GAIL selling petroleum products |
Petroleum products remain OUTSIDE GST — VAT/excise applies. GST on other services they provide. |
Key exemption — NN 73/2018-CT (TDS):
Supplies between government departments and PSUs — and between PSUs — are
exempt from TDS under Section 51. Rationale: since all entities are ultimately government-owned, TDS would be pointless (government paying TDS to itself). This exemption covers:
- One Central/State Govt Dept → Another Dept
- Central Govt → PSU or PSU → Central Govt
- PSU → PSU
Private companies supplying to PSUs — TDS still applies.
9. Municipal Bodies & Local Authorities — What’s Taxable, What’s Not
Local authorities (municipal corporations, municipalities, panchayats, cantonment boards) exercise powers under Articles 243G and 243W of the Constitution. Many of their core activities are GST-exempt. But their commercial activities are taxable.
Constitutional Functions — Exempt (Entry 21B, NN 12/2017-CT(R))
- ✓ Water supply, sanitation, sewerage management
- ✓ Solid waste management, garbage collection
- ✓ Regulation of slaughter houses and cattle pounds
- ✓ Public parks, gardens, playgrounds
- ✓ Street lighting in public areas
- ✓ Burial and burning grounds
- ✓ Primary and secondary education (public schools run by municipalities)
Commercial Activities — Taxable
- ✗ Renting of municipal property for commercial events
- ✗ Renting of shops / commercial spaces in municipal markets
- ✗ Commercial parking lots run by municipality
- ✗ Advertisement on municipal hoardings/property
- ✗ Sale of land by municipality (Schedule II — treated as supply of service)
Municipality Transactions — GST Position
| Transaction |
GST? |
Rate |
Mechanism |
| Municipality charges ₹500 property tax |
No |
Nil |
Not a supply — sovereign function |
| Municipality rents market stall to vendor |
Yes |
18% |
Business entity receives service → RCM (§ 9(3) Entry 5) |
| Municipality awards road repair contract to ABC Ltd. |
Yes |
18% |
ABC charges 18%; municipality deducts 2% TDS under § 51 |
| Municipality provides water supply to residents |
No |
Nil |
Constitutional function — exempt |
| Municipality provides solid waste management service (Swachh Bharat) |
No |
Nil |
Constitutional function — exempt |
10. TDS Under GST — Section 51: Who Deducts, What Rate, How to File
Section 51 of the CGST Act requires specified government-related entities to deduct tax at source when making payments to suppliers under contracts above ₹2.5 lakh. This is GST TDS — separate from Income Tax TDS.
Who Must Deduct GST TDS?
- Department/establishment of Central Government or State Government
- Local authorities (municipal corporations, panchayats, cantonment boards)
- Governmental agencies
- PSUs (public sector undertakings)
- Authority, board, or body set up by Parliament/State Legislature with 51%+ government equity or control
- Society established by Central/State Government / local authority under Societies Registration Act
- Persons who purchase scrap (new addition — effective 2024) — to track the unorganised scrap trade
🆕 2024 Amendment — Scrap Buyers Added to Section 51:
Persons who purchase scrap have been brought within the Section 51 TDS framework. A scrap buyer who is registered under GST must now deduct 2% GST TDS when purchasing scrap from a registered supplier under a single contract exceeding ₹2.5 lakh. This targets under-reporting in the scrap/recycling industry.
TDS Rate and Calculation
| Type of Supply |
GST TDS Rate |
How Deducted |
| Intra-state supply (supplier, recipient, place of supply — all same state) |
2% = 1% CGST + 1% SGST |
Deducted at time of payment; deposited separately as CGST TDS + SGST TDS |
| Inter-state supply (IGST applies) |
2% IGST |
Deducted and deposited as IGST TDS |
| Exempt, nil-rated, or non-taxable supplies |
0% — TDS NOT applicable |
No TDS on exempt transactions |
Important: TDS is on taxable value EXCLUDING GST
If Railway awards a ₹10 lakh contract (excluding GST) and supplier charges 18% GST (₹1.8 lakh), total invoice = ₹11.8 lakh.
TDS = 2% × ₹10 lakh = ₹20,000 (on taxable value only — NOT on ₹11.8 lakh).
Supplier receives ₹11.8L − ₹20,000 = ₹11.6L; Railway deposits ₹20,000 as CGST+SGST TDS.
TDS Compliance: Filing GSTR-7
| Step |
Action |
Due Date |
| 1 |
Government/PSU registers as TDS deductor on GST portal (separate from normal GST registration) |
One-time setup |
| 2 |
Deduct TDS at time of payment to supplier |
At payment |
| 3 |
File GSTR-7 — TDS return for the month |
10th of following month |
| 4 |
Issue TDS certificate to supplier in Form GSTR-7A |
5 days after filing GSTR-7 |
| 5 |
Supplier accepts in GSTR-2A; TDS credited to supplier’s Electronic Cash Ledger |
Auto-credited after supplier acceptance |
⚠️ TDS mismatch — a major issue for contractors:
If a government department deducts TDS but does NOT file GSTR-7 on time, the credit does NOT appear in the supplier’s GSTR-2A/2B. The supplier cannot use the TDS credit. This affects cash flow and ITR reconciliation for contractors. Suppliers must follow up with the deductor to ensure GSTR-7 is filed timely.
When TDS Does NOT Apply
- Contract value does not exceed ₹2.5 lakh (excluding GST)
- Exempt/nil-rated supplies
- Inter-govt / govt-to-PSU / PSU-to-PSU transactions (NN 73/2018-CT)
- Supply where location of supplier and place of supply are in the same state but TDS deductor is in a different state (different GSTIN state)
Consequences of Non-Deduction / Non-Filing
- Interest at 18% per annum on TDS not deposited in time
- Penalty equal to tax amount under Section 122 CGST
- Late fee for GSTR-7: ₹100/day (CGST) + ₹100/day (SGST) = ₹200/day; maximum ₹10,000 per return
- Income tax implications — failure to deduct TDS under GST may also signal contract irregularities that income tax officers may pursue separately
11. E-Invoicing: Government Departments Are Exempt — October 2024 Update
🆕 E-invoicing exemption for Government Departments and Local Authorities:
As per CBIC notifications (Rule 48(4) of CGST Rules), government departments and local authorities are excluded from the e-invoicing requirement. They are not required to generate e-invoices on the IRP (Invoice Registration Portal) for their supplies — even if the supply is taxable and over the turnover threshold.
Impact for contractors: If a government department supplies you (e.g., sells scrap, rents property) — do NOT expect an IRN-stamped e-invoice. Their invoice is valid without IRN. However, as a recipient, you still need to report the supply in your GSTR-3B correctly.
Vendors TO government: If you are a private vendor supplying to government and your turnover exceeds ₹5 crore — you MUST generate e-invoices on your supplies to government departments. The exemption applies to government as supplier, not government as recipient.
12. Impact of 56th GST Council Rate Rationalisation on Government Contracts
The 56th GST Council’s restructuring (effective 22 September 2025) had the following specific impacts on government-related transactions:
| Transaction |
Pre-22 Sept 2025 |
Post-22 Sept 2025 |
| Works contract by contractor to government (most categories) |
12% (some); 18% (others) |
18% uniformly (12% eliminated) |
| Rail container transport (non-Indian Railways) |
12% with ITC |
18% with ITC OR 5% without ITC |
| Pipeline transport (crude, natural gas) |
12% with ITC |
18% with ITC |
| Multimodal transport in India |
12% |
18% with ITC |
| Non-economy air travel (government officials, PSU travel) |
12% |
18% |
| Local delivery services through ECO |
Not covered under GTA |
E-commerce operator pays 18% under § 9(5) |
| Services by advocates to government entities |
18% (RCM) |
18% — no change |
| GTA services (government freight) |
5% RCM / 5% FCM / 12% FCM with ITC |
5% RCM / 5% FCM / 18% FCM with ITC |
| ITC on cement for government construction |
28% cement tax; ITC available |
18% cement tax (post rationalisation); ITC available — significant cost reduction |
| Steel, construction materials for government projects |
18% (mostly unchanged) |
18% — no change for most steel items |
Silver lining for government contractors: While service rates went up (12%→18% for works contracts), the GST rate on cement reduced from 28% to 18% post rationalization. Since cement is a major input for construction contracts, the input cost reduction partially offsets the rate increase. Contractors should model the net impact on their specific project composition.
13. Practical Guidance for Contractors, Vendors & Departments
For Contractors Supplying to Government
- Check HSN/SAC code: Works contract = SAC 9954; consultancy = 9983; security = 9985. Correct SAC affects ITC eligibility and rate determination.
- Rate revision clause in contract: Always negotiate a “change in law” clause. The September 2025 rate change from 12% to 18% is exactly the scenario such clauses protect against.
- TDS tracking: Monitor your GSTR-2A/2B for TDS credits. If the government department hasn’t filed GSTR-7, your credit doesn’t appear. Follow up proactively.
- Timing invoices: Under Section 14 CGST, time of supply changes with each invoice. Invoice before rate change date where legally permitted can lock in the old rate — but only for work completed before the change date.
- Input ITC on cement: Claim ITC on the 18% GST on cement purchased for government construction contracts (not blocked under § 17(5) for these contracts).
For Government Departments (As Recipient of Services)
- Register as TDS deductor: Separate registration from normal GST registration is required under Section 51 before deducting TDS.
- File GSTR-7 by 10th: Late filing harms your contractor. They cannot access TDS credit in their cash ledger until you file.
- Don’t deduct TDS on exempt supplies: If procuring a pure service for constitutional functions (Entry 3 exempt) — TDS does not apply to exempt transactions.
- E-invoicing: You are exempt from generating e-invoices. But your vendors with turnover >₹5 crore must provide you with IRN-stamped invoices.
14. Common GST Issues, Notices & Disputes in Government Transactions
| Issue |
Common Scenario |
Resolution |
| Exemption vs taxable determination |
Consultant argues services to govt = exempt under Entry 3; dept disagrees |
Verify the constitutional function nexus. Pure services = exempt. Mixed services with goods >25% = not Entry 3A. Get legal opinion. |
| Works contract rate post-Sept 2025 |
Contractor invoicing old 12% on new work |
Update all invoices to 18% from 22 Sept 2025. Issue credit notes for past wrong-rate invoices if within time limit. |
| TDS credit not reflecting |
Contractor’s GSTR-2B doesn’t show TDS; cannot use credit |
Write to government department demanding GSTR-7 filing. Escalate to purchase department if needed. |
| Sub-contractor claiming exemption |
Sub-contractor says government project = exempt |
Exemption does not pass down the supply chain to sub-contractors. 18% applies to sub-contractor’s supply. |
| PSU claiming inter-PSU TDS exemption incorrectly |
PSU deducts TDS from a private vendor thinking it’s exempt |
NN 73/2018-CT exempts TDS only for govt-to-govt / PSU-to-PSU. Private vendor supplies to PSU = TDS mandatory. |
| ITC reversal for construction of own building |
Government department blocks ITC on construction of office |
Section 17(5)(d) — ITC blocked on construction of own immovable property. ITC is available if the building is for renting to taxable persons. |
| Petroleum products and GST |
Contractor using petroleum for vehicles charges 18% GST; claims ITC on fuel |
GST ITC on petroleum products (petrol, diesel, ATF, natural gas) is blocked under § 17(5)(g). No ITC on fuel even for construction contractors. |
15. Case Studies
Case 1: IT Company Providing Software to a State Government Department
CloudTech Pvt. Ltd. develops a citizen services portal for the State IT Department for ₹50 lakh.
- Service type: Software development — SAC 9983. Not a pure service qualifying for Entry 3 (complex, involves multiple elements including goods-like supply of software)
- GST rate: 18% → Invoice for ₹50L + ₹9L GST = ₹59L
- TDS: State IT Dept deducts 2% TDS on ₹50L = ₹1L (CGST ₹50,000 + SGST ₹50,000)
- Payment to CloudTech: ₹59L − ₹1L TDS = ₹58L
- CloudTech’s position: ₹9L GST on its GSTR-3B; ₹1L TDS credit in Electronic Cash Ledger
- State Dept files: GSTR-7 by 10th of following month declaring ₹1L TDS
Case 2: Road Construction Contractor — Rate Change Impact (Sept 2025)
Highroads Ltd. was awarded a NH road contract by NHAI in January 2025 at 12% GST. Work continues into 2026.
| Invoice date |
Applicable Rate |
Impact |
| March 2025 (RA Bill for work done) |
12% |
Normal — 12% was applicable |
| October 2025 (RA Bill for post-Sept work) |
18% |
Rate changed — 6% additional GST on same work |
| March 2026 (RA Bill) |
18% |
Continues at 18% |
Remedy: Highroads invokes the “change in law” clause in its NHAI contract, seeking price escalation to cover the additional 6% GST. NHAI is required to assess this claim. Pending escalation, Highroads must comply with 18% billing to avoid under-reporting — the tax liability cannot be deferred based on contract dispute.
Case 3: Municipality Renting Market Stall — RCM Scenario
MCD rents a shop in a government market to Sharma Traders (GST registered) for ₹15,000/month.
- Nature: Renting of commercial property by local authority to a business entity — taxable, not a constitutional function
- RCM: Sharma Traders must pay 18% GST (₹2,700/month) under RCM — MCD does not charge GST on rent invoice
- Sharma Traders: Issues self-invoice monthly, pays CGST + SGST in cash, claims ITC if used for business
- Annual GST exposure if Sharma Traders misses: ₹32,400 + 18% p.a. interest
Case 4: Security Agency — Forward Charge to PSU
SecureGuard Pvt. Ltd. (body corporate) provides security personnel to ONGC (PSU) under a ₹1 crore annual contract.
- SecureGuard is a body corporate → Forward charge (NOT RCM — RCM applies only when supplier is NOT a body corporate)
- SecureGuard charges 18% GST on its invoice to ONGC
- ONGC pays full invoice; ONGC deducts 2% GST TDS = ₹2,00,000 on the ₹1 crore taxable value
- ONGC files GSTR-7; SecureGuard gets TDS credit in Electronic Cash Ledger
- SecureGuard net GST payable = ₹18L (from invoice) − ₹2L (TDS credit) = ₹16L in cash via GSTR-3B
16. Frequently Asked Questions
Q1. Our company provides cleaning services to a government hospital. Is this exempt?
Depends on the nature. If cleaning services are pure services (no significant goods involved) and the hospital is performing its constitutional/statutory function (healthcare) — it may qualify under Entry 3, NN 12/2017, as a pure service to Central/State Government for a constitutional function. However, if the hospital is a PSU-run or private hospital contracted by government, the exemption does not automatically apply. Verify whether: (a) the recipient is Central/State Govt/UT/local authority (not a PSU), (b) the hospital function is constitutional/statutory, and (c) you are providing pure services (not works contract). If all three — exempt. If any fails — 18% applies.
Q2. We won an NHAI highway contract at 12% GST in early 2025. How do we bill work done after September 22, 2025?
Under Section 14 of CGST Act, the GST rate applicable is the one at the time of supply (invoice date / payment date, whichever is earlier). Work invoiced after 22 September 2025 must be billed at 18% — the old 12% rate no longer applies regardless of when the contract was awarded. You should: (1) Bill all October 2025 onwards RA bills at 18%, (2) Invoke the “change in law / statutory levies” clause in your NHAI contract for price escalation, (3) Consult GCA to model the exact cash flow impact and filing strategy for transitional invoices.
Q3. We are an MSME contractor. The government department didn’t file their GSTR-7. Can we get our TDS credit?
No — unfortunately not, until the deductor (government department) files their GSTR-7. TDS credit flows to your Electronic Cash Ledger only after the deductor files. Your practical options: (1) Write to the TDS deductor’s accounts/purchase department demanding GSTR-7 filing — it is a legal obligation, (2) Escalate to their CDA/DDO (Drawing and Disbursing Officer), (3) File your own returns correctly showing the expected credit — if TDS comes later, it will reduce your future liability. You cannot claim a refund of TDS that hasn’t been deposited by the deductor.
Q4. Does GST TDS apply if we supply goods to a state government department worth ₹2 lakh?
No — the ₹2.5 lakh threshold is per single contract. If the total contract value (excluding GST) is ₹2 lakh, TDS under Section 51 does not apply. If the same department has multiple contracts with you — each contract is assessed independently. However, if you receive multiple purchase orders under one master contract where the total value exceeds ₹2.5 lakh, TDS applies to all payments under that contract from the first payment.
Q5. Is there any GST on the petrol/diesel I use in construction vehicles for a government highway project?
Petrol, diesel, and aviation turbine fuel are currently outside the GST framework — they attract excise duty (Central Excise) and VAT (state), not GST. Natural gas (used in some equipment) is also outside GST. This means: (a) You pay VAT/excise on fuel — not GST; (b) There is NO ITC on fuel under GST — Section 17(5)(g) blocks ITC on motor vehicle fuel; (c) The fuel cost is a pure cash cost for your project. This is a persistent demand from the construction and logistics industry — inclusion of petroleum in GST — but as of May 2026, it remains outside GST.
Q6. Our PSU buys scrap from another PSU. Does new TDS apply?
The 2024 amendment added scrap buyers to the Section 51 TDS framework. However, the exemption under NN 73/2018-CT for supplies between PSUs/government entities continues. If both the selling PSU and buying PSU are covered under the inter-entity exemption, TDS is not deducted on the scrap transaction. Verify that both entities are specifically covered under the NN 73/2018 exemption list. Private scrap recyclers buying from registered suppliers — TDS at 2% applies if contract value >₹2.5L.
Government Contracts & GST Compliance — GCA Helps You Get It Right
Government contracts carry high stakes — from rate classification to TDS compliance to works contract rate changes after the September 2025 rationalization. GCA’s team reviews contract terms, determines correct GST rates, assists with GSTR-7 follow-up, handles government GST notices, and ensures your GST returns accurately reflect every government transaction. Pan-India, 100% digital.
📞 +91-9911369185 · ✉️ delhi@guptachandanassociates.com
Disclaimer: Educational purposes only. Based on CGST Act 2017, IGST Act 2017, Constitution of India, and related notifications/circulars up to May 2026. Verify current notifications for specific transactions. Consult a qualified professional for specific advice.
Key References: § 2(53), 2(69), 2(84), 7, 9(3), 9(5), 51, Schedule I/II/III — CGST Act 2017 · § 5(3) IGST Act · Rule 66 (GSTR-7) · NN 12/2017-CT(R) Entries 3, 3A, 4, 5, 21B, 22, 23 · NN 13/2017-CT(R) Entry 5 · NN 11/2017-CT(R) (works contract rates) · NN 50/2018-CT (§ 51 deductors) · NN 73/2018-CT (inter-PSU/govt TDS exemption) · NN 09-17/2025-CT(R) (56th Council rate changes, 22 Sept 2025) · Article 243G, 243W Constitution of India
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