GST TDS and TCS: Sections 51 & 52, Rates and Compliance

Sections 51 and 52 of the CGST Act introduce two collection mechanisms that work quite differently from ordinary GST payment: Tax Deducted at Source (TDS) and Tax Collected at Source (TCS). Both are compliance-heavy provisions touching government contracts and e-commerce transactions, yet their mechanics are frequently misunderstood by deductors, collectors, and suppliers alike.

A clear grasp of both sections is essential for anyone advising on government work or online marketplace sales.

TDS under Section 51: Who deducts, and how much

Section 51 requires specified deductors, government departments, local authorities, governmental agencies, and certain notified persons to deduct 2% TDS (1% CGST + 1% SGST, or 2% IGST) wherever the value of a taxable supply under a contract exceeds ₹250,000.

The deducted amount must reach the government within ten days of the month's end, with the deductor filing Form GSTR-7 by the same date; this auto-generates a TDS certificate in Form GSTR-7A for the supplier. The credit lands in the supplier's electronic cash ledger, available to pay output tax or claim as a refund.

In practice, deductors often overlook the mandatory TDS-specific registration, delay deposits and attract interest, or wrongly test the ₹250,000 threshold against each invoice rather than the underlying contract value. Notably, no TDS applies to supplies that are wholly exempt from GST or where the supplier is unregistered.

TCS under Section 52: The e-commerce compliance layer

Section 52 obliges e-commerce operators such as Amazon or Flipkart, who collect payment on behalf of sellers, to collect TCS at 1% (0.5% CGST + 0.5% SGST, or 1% IGST) on the net value of taxable supplies made through their platform. This must be deposited within ten days of month-end, with a monthly statement filed in Form GSTR-8; the credit then flows to the seller's cash ledger.

Suppliers selling through such platforms must also register under GST compulsorily, regardless of their turnover, barring a few notified exceptions. A recurring source of confusion is conflating this TCS obligation with Section 9(5), under which the operator itself becomes liable to pay tax as though it were the supplier for certain notified services; the two are entirely distinct mechanisms.

Mismatches between GSTR-8 and sellers' GSTR-3B, plus working-capital blockage until credit reflects, remain persistent pain points for online sellers.

A quick illustration

A government department awards a works contract worth ₹500,000 plus GST to a registered contractor. As the value crosses ₹250,000, the department deducts 2% TDS of ₹10,000 at the time of payment, deposits it by the 10th of the following month, and files GSTR-7. The contractor then sees ₹10,000 credited to its cash ledger, usable against its own GST liability.

How to stay compliant with GST TDS and TCS

Sections 51 and 52 are designed to widen the GST compliance trail rather than impose an additional tax burden, since the amount deducted or collected ultimately becomes available to the supplier as credit. For deductors, e-commerce operators, and sellers, the priority should remain timely registration, correct deduction or collection, punctual deposits, and careful reconciliation of TDS and TCS filings to prevent credit mismatches and avoidable disputes.

For businesses managing these requirements at scale, Masters India can support GST compliance through its GST software and APIs, helping teams manage filings, reconciliation, and related compliance workflows more efficiently.

GST TDS & TCS: compliance checklist

Section 51 (TDS) and Section 52 (TCS) of the CGST Act, 2017, Ready-to-use action list

Part A: TDS checklist (Section 51)

A1. Applicability screening

☐ Is the deductor a central/state government department, local authority, governmental agency, notified board/authority/society, or PSU?

☐ With effect from 10.10.2024, is the deductor a registered person receiving metal scrap (Customs Tariff Chapters 72-81) from another registered person?

☐ Does the taxable value under the individual contract exceed ₹250,000?

☐ Is the supply taxable (not exempt / nil-rated / non-taxable)?

☐ Do the supplier, place of supply, and recipient's registration states align so the deducted SGST/UTGST can actually be utilised?

☐ Is the supply between two specified deductor entities inter se (e.g., PSU to PSU)? If yes and it is NOT a metal scrap transaction, TDS is exempt.

A2. Registration

☐ Apply in FORM GST REG-07 (TAN-based for govt deductors; PAN-based for metal scrap deductors).

☐ Obtain FORM GST REG-06 registration certificate (issued within 3 working days).

☐ File FORM GST REG-08 to cancel registration once no longer liable to deduct.\

A3. Deduction (every transaction)

☐ Deduct 2% - 1% CGST + 1% SGST/UTGST (intra-State) or 2% IGST (inter-State)  on the taxable value only.

☐ Deduct at the earlier of: (a) time of payment to supplier or (b) time of credit to supplier's account.

☐ Record the deduction contract-wise / invoice-wise in a TDS deduction register.

A4. Deposit & return filing (monthly)

☐ Deposit TDS to the government within 10 days after month-end, via FORM GST PMT-06.

☐ File FORM GSTR-7 by the 10th of the succeeding month, with invoice-level details.

☐ File sequentially month-on-month filing is mandatory w.e.f. 01.11.2024.

☐ File NIL GSTR-7 even where no deduction was made in the month (mandatory; no late fee on NIL).

☐ Confirm FORM GSTR-7A (TDS certificate) auto-generates and reaches the deductee on filing.

☐ Reconcile deductee-wise TDS deducted against GSTR-7 filed and against books.

A5. Exceptions, interest & refund

☐ Pay interest at 18% p.a. for any delay in depositing TDS (Sec. 50(1) r/w Sec. 51(6)).

☐ Late fee exposure on delayed GSTR-7: ₹100/day CGST + ₹100/day SGST, capped at ₹5,000 per Act; nil on IGST.

☐ For erroneous/excess deduction, process refund under Section 54 only if the amount has NOT already been credited to the deductee's electronic cash ledger.

Part B: TCS checklist (Section 52)

B1. Applicability screening

☐ Is the entity an electronic commerce operator (ECO) collecting consideration on behalf of suppliers (i.e., not a pure agent)?

☐ Exclude supplies made by the ECO on its own account.

☐ Exclude services notified under Section 9(5) where the ECO itself discharges GST as deemed supplier.

B2. Registration

☐ Obtain compulsory GST registration no. threshold exemption under Section 24.

☐ Register separately in every state/UT of operation.

☐ Confirm suppliers selling through the platform (other than Sec. 9(5) supplies) are also GST-registered.

B3. Collection (monthly, supplier-wise)

☐ Compute “net value of taxable supplies” gross taxable supplies through the platform, less returns, excluding Sec. 9(5) supplies.

☐ Collect TCS @ 0.5% aggregate - 0.25% CGST + 0.25% SGST/UTGST (intra-State) or 0.5% IGST (inter-State) - current rate effective 10.07.2024.

☐ Collect at the time of remitting consideration to the supplier.

B4. Deposit & return filing (monthly)

☐ Deposit TCS to the government within 10 days after month-end, via FORM GST PMT-06.

☐ File FORM GSTR-8 by the 10th of the succeeding month, selecting the correct Place of Supply for each record.

☐ Remember GSTR-8 cannot be revised for correct errors via amendment tables in a later month's return.

☐ Confirm TCS collected is reflected in the supplier's electronic cash ledger/GSTR-2B.

B5. Annual statement & other obligations

☐ Check current-year applicability of FORM GSTR-9B (annual TCS statement, due 31 December); filing has been kept in abeyance by CBIC. Confirm on the portal before assuming exemption.

☐ Respond to any proper-officer notice under Section 52(12) within 15 working days.

☐ Track and resolve matching discrepancies under Section 52(9)-(11) before they are added to the supplier's liability with interest.

☐ Pay interest at 18% p.a. on any delayed TCS deposit; the late fee on delayed GSTR-8 mirrors GSTR-7 (₹100/day CGST + ₹100/day SGST, capped at ₹5,000 per Act).

Cross-cutting - before every filing cycle

☐ Re-verify current TDS/TCS rates and notified categories on the CBIC portal both have changed since the original notification.

☐ Retain contract copies, deduction/collection workings, PMT-06 challans, and filed returns for the audit trail.

☐ Flag any newly notified deductor/collector category (e.g., metal scrap) against the client base each quarter.