Skip to content

CMA Final · Indirect Tax Laws and Practice

TDS and TCS under GST: CMA Final Paper 19 Guide

TDS under GST (Section 51) makes notified deductors, such as government bodies and local authorities, deduct 1% from payments to suppliers when the contract value exceeds ₹2,50,000. TCS (Section 52) makes e-commerce operators collect a notified rate, up to 1%, on the net value of supplies made through them. Both are deposited within ten days after month-end.

What this chapter covers

This chapter covers two collection tools in GST: tax deducted at source (TDS) under Section 51 and tax collected at source (TCS) under Section 52. They are not extra taxes. They are advance payments of the supplier's tax, taken by a third party and later credited to the supplier.

TDS applies when a notified deductor pays a supplier under a contract. TCS applies when an e-commerce operator collects the consideration for supplies made by other suppliers through its platform. In both cases you must know who collects, at what rate, on what value, when to deposit, what return or statement to file, and how the supplier gets credit.

The chapter links to registration, time and value of supply, place of supply, returns and payment of tax, interest under Section 50, and refunds under Section 54. The last topic, revision of FORM GST TRAN-1 under Rule 120A, is a transitional provision. It is short and is best learnt as a separate fact set.

The chapter is compact and rule-based, so it suits objective questions where one condition decides the answer, such as the ₹2,50,000 threshold, the inter-State proviso or the ten-day deadline. The same rules also appear in short written questions that ask you to compute the deduction and state the compliance steps. Once you know the conditions, you can score reliably here with little study time.

TDS and TCS under GST: topics in the order to study them

  1. 1TDS under GST: Section 51 and DeductorsStart with who must deduct, the 1% rate, the ₹2,50,000 contract threshold and the inter-State proviso, as everything else builds on these.
  2. 2TDS Deposit, Returns and CertificatesAfter the deduction rule, learn what the deductor must do next: deposit within ten days after month-end, interest on failure and the certificate.
  3. 3TCS under GST: Section 52 and E-commerce OperatorsTCS mirrors TDS in structure, so it is easier once TDS is clear. Focus on net value of taxable supplies, statements and matching.
  4. 4Credit of TDS/TCS and Electronic Cash LedgerThis ties both topics together by showing how the supplier claims credit in the electronic cash ledger and how refunds are limited.
  5. 5Revision of Declaration in FORM GST TRAN-1 (Rule 120A)Keep this short transitional rule for last, as it is a standalone point and does not depend on the earlier topics.

How to prepare TDS and TCS under GST

Treat this chapter as a set of conditions and time limits. Learn them in a fixed pattern for TDS and TCS, then practise small applications.

  1. Make a two-column comparison of TDS and TCS covering who collects, rate, base value, deposit date, statement or return, and credit to the supplier.
  2. Learn the Section 51 conditions exactly: notified deductors, 1% rate, contract value above ₹2,50,000, and value taken excluding CGST, SGST/UTGST, IGST and cess shown in the invoice.
  3. Memorise the inter-State proviso: no TDS if the supplier's location and the place of supply are in a State or Union territory different from the recipient's State or Union territory of registration.
  4. Practise small numerical cases. Strip the tax from the invoice value first, test the threshold on the total contract value, then apply 1%.
  5. Learn Section 52 in order: collection, net value (supplies less returns), deposit within ten days, monthly statement, annual statement by 31 December, rectification and matching of details.
  6. Revise credit and refund rules: the deductee claims credit in the electronic cash ledger, and no refund goes to the deductor once the amount is credited to the deductee's ledger.
  7. Finish with Rule 120A: a registered person who filed FORM GST TRAN-1 on time may revise it once, within the period in Rules 117 to 120 or any extension. Then attempt past MCQs.

Common mistakes in TDS and TCS under GST

  • Applying the ₹2,50,000 threshold to a single invoice or payment instead of the total contract value.

    Fix: Section 51 says the total value of supply under a contract must exceed ₹2,50,000. Check the contract value first.

  • Calculating TDS on the invoice total including GST.

    Fix: The Explanation to Section 51(1) excludes central tax, State tax, UT tax, integrated tax and cess shown in the invoice. Deduct 1% on the remaining value.

  • Deducting TDS on an inter-State supply to a Government department.

    Fix: Compare the supplier's location and place of supply with the recipient's State of registration. If both differ from it, no deduction is made.

  • Mixing up TDS and TCS parties and rates.

    Fix: TDS: notified deductor pays supplier, fixed 1%. TCS: e-commerce operator collects from consideration, notified rate up to 1%. Keep your comparison table.

  • Ignoring supplies returned when computing the TCS base.

    Fix: Net value of taxable supplies is aggregate taxable supplies in the month less supplies returned to suppliers in that month.

  • Thinking Rule 120A allows repeated revisions of FORM GST TRAN-1.

    Fix: The rule allows the declaration to be revised once, within the time stated in Rules 117 to 120 or an extended period.

Last-day revision: TDS and TCS under GST

  • Section 51 TDS rate is 1% on payment made or credited to the supplier.
  • TDS applies only where total contract value exceeds ₹2,50,000, and the value excludes GST and cess shown in the invoice.
  • Deductors are notified: Government departments, local authorities, governmental agencies and other notified persons.
  • No TDS if supplier's location and place of supply are in a different State or Union territory from the recipient's registration.
  • TDS and TCS are both deposited within ten days after the end of the month of deduction or collection.
  • Deductor failing to pay the deducted amount pays interest under Section 50(1) in addition to the tax.
  • The deductee claims TDS credit in the electronic cash ledger, based on the deductor's return under Section 39(3).
  • No refund to the deductor if the amount has been credited to the deductee's electronic cash ledger.
  • Section 52 TCS applies to e-commerce operators who are not agents, at a notified rate not exceeding 1%.
  • TCS base is net value of taxable supplies: supplies made through the operator less supplies returned in the month.
  • Operator files a monthly statement within ten days after month-end and an annual statement before 31 December after the financial year.
  • Rule 120A: FORM GST TRAN-1 can be revised once, within the time in Rules 117 to 120 or as extended by the Commissioner.

TDS and TCS under GST practice questions

TDS and TCS under GST in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

TDS and TCS under GST: frequently asked questions

At what rate is TDS deducted under GST?

Section 51 provides for deduction at one per cent from the payment made or credited to the supplier. It applies where the total value of supply under a contract exceeds ₹2,50,000, excluding GST and cess shown in the invoice.

When must TDS and TCS be deposited with the Government?

Both must be paid within ten days after the end of the month in which the deduction or collection is made. A deductor who fails to pay the deducted amount owes interest under Section 50(1) in addition to the tax.

How does the supplier get credit for TDS or TCS?

The deductee claims credit in the electronic cash ledger for TDS reflected in the deductor's return under Section 39(3). For TCS, the supplier claims credit in the electronic cash ledger for the amount reflected in the operator's statement.

What is the TCS rate for e-commerce operators?

Section 52 says the operator collects an amount at a rate notified by the Government on the Council's recommendation, not exceeding one per cent. The base is the net value of taxable supplies made through it where the operator collects the consideration.

Can FORM GST TRAN-1 be revised more than once?

No. Rule 120A allows a registered person who filed it on time to revise it once. The revision must be within the time in Rules 117, 118, 119 and 120, or any further period the Commissioner extends.