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CA Intermediate · Taxation

Tax Deduction at Source and Collection of Tax at Source (GST) for CA Intermediate

Under GST, TDS makes specified government bodies deduct 2% of the taxable value when a contract's value exceeds ₹2,50,000. TCS makes e-commerce operators collect 0.5% of the net taxable value of supplies made through them. Solve by finding the deductor or operator, the value, the rate, then the compliance dates.

What this chapter covers

This chapter in Paper 3 Section B covers two tools that collect GST early and at the source. TDS under Section 51 of the CGST Act applies when notified recipients, mainly government bodies, pay suppliers under a contract. TCS under Section 52 applies when an e-commerce operator collects consideration for supplies made by others through its platform.

Both tools follow the same pattern: who is liable, on what value, at what rate, and how to register, pay, file and report. If you learn this pattern once, the four topics fit together quickly. The chapter is short and mostly rule-based, so it is a good place to secure marks.

It links to registration, time and value of supply, place of supply, input tax credit and returns. TDS and TCS amounts reach the supplier's electronic cash ledger, so they connect to payment of tax. Questions often mix this chapter with the value of supply or the intra-state versus inter-state split.

The chapter has a small set of fixed numbers and dates, so you can learn it in a short time and apply it to both MCQs and short written answers. Examiners like testing the ₹2,50,000 threshold, the value on which TDS is computed, the CGST, SGST and IGST split, and filing dates. These are low-effort marks if you are accurate. A wrong rate or a missed condition loses the whole answer, so precision matters more than length.

Tax Deduction at Source and Collection of Tax at Source: topics in the order to study them

  1. 1TDS under GST: Section 51 and Who Must DeductStart here because you must know who the deductor is and when the duty arises before you can compute anything.
  2. 2TDS Rate, Value and Computation under GSTNext, apply the threshold, the value on which TDS is computed and the rate to split tax into CGST, SGST or IGST.
  3. 3TDS Compliance: Registration, Payment, Returns and CertificateOnce you can compute, learn the procedure: registration, payment, GSTR-7, certificate and late consequences.
  4. 4Tax Collection at Source (TCS) by E-commerce OperatorsFinish with TCS, which mirrors TDS in structure, so you can learn it by comparing it with what you already know.

How to prepare Tax Deduction at Source and Collection of Tax at Source

Treat this as a compare-and-contrast chapter. Build one summary sheet for TDS and TCS, then practise numbers on it.

  1. Read Section 51 and list the deductors in plain words: Central or State Government departments, local authorities, governmental agencies and other notified persons.
  2. Learn the trigger: total value of supply under a contract exceeding ₹2,50,000, and note that the value is taken excluding GST shown on the invoice.
  3. Memorise the TDS rate of 2% in total and the split rule. If the supplier's location and the place of supply are in the same State, deduct CGST + SGST (1% each); otherwise deduct IGST (2%).
  4. Make a compliance timeline: deductor registration, payment within 10 days after the end of the month in which the deduction is made, GSTR-7 by the 10th of the next month, and the certificate (Form GSTR-7A) within 5 days of crediting the deducted amount to the Government. A late fee applies if the certificate is delayed.
  5. Learn TCS the same way: who is the operator, net value of taxable supplies (taxable supplies less taxable supplies returned), rate of 0.5% in total (0.25% CGST plus 0.25% SGST, or 0.5% IGST), GSTR-8 and the annual statement.
  6. Solve at least ten numerical and scenario questions. For each, write in order: applicability, value, rate, tax split, due date. This is the format that earns step marks.
  7. In the last days, drill MCQs on thresholds, dates and rates, since there is no negative marking and every question should be attempted.

Common mistakes in Tax Deduction at Source and Collection of Tax at Source

  • Computing TDS on the invoice value including GST.

    Fix: Always write 'value excluding GST' as your first line, then apply 2%.

  • Applying TDS when the contract value is exactly ₹2,50,000 or below.

    Fix: Write the test as 'value > ₹2,50,000' and check the contract's total value, not a single payment.

  • Splitting the tax wrongly between CGST, SGST and IGST.

    Fix: Decide intra-state or inter-state first, by comparing the supplier's location with the place of supply. Then use 1% plus 1% or 2% IGST for TDS, and 0.25% plus 0.25% or 0.5% IGST for TCS.

  • Mixing up TDS and TCS dates and returns.

    Fix: Keep a two-row table in your notes: TDS with GSTR-7 and certificate, TCS with GSTR-8 and annual statement.

  • Calculating TCS on gross sales instead of net value.

    Fix: Use net taxable value = taxable supplies made through the platform less returns, then apply the rate.

  • Writing only the final figure in a written answer.

    Fix: State the provision, check the conditions, show the value, rate and split, then conclude. Step marks depend on this.

Last-day revision: Tax Deduction at Source and Collection of Tax at Source

  • Section 51 CGST covers TDS; Section 52 covers TCS.
  • TDS applies when the contract value exceeds ₹2,50,000.
  • TDS value excludes GST shown in the invoice.
  • TDS rate is 2%: 1% CGST plus 1% SGST if the supplier's location and the place of supply are in the same State, otherwise 2% IGST.
  • Deductors are notified government bodies, local authorities and agencies, and specified notified persons.
  • Deductors must register for TDS even if they are below the normal registration threshold.
  • TDS is paid within 10 days after the end of the month in which the deduction is made.
  • GSTR-7 is due by the 10th of the next month; the certificate (Form GSTR-7A) is issued within 5 days of crediting the deducted amount to the Government, and a late fee applies for delay.
  • TCS applies to e-commerce operators on the net value of taxable supplies made through them. Net value = aggregate value of taxable supplies, less taxable supplies returned to the suppliers.
  • TCS rate is 0.5%: 0.25% CGST plus 0.25% SGST, or 0.5% IGST.
  • Operators file GSTR-8 by the 10th of the following month and an annual statement by 31 December following the end of the financial year.
  • TDS and TCS amounts are credited to the supplier's electronic cash ledger.

Tax Deduction at Source and Collection of Tax at Source practice questions

Tax Deduction at Source and Collection of Tax at Source in other exams

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

Tax Deduction at Source and Collection of Tax at Source: frequently asked questions

Is GST TDS in this chapter or is it income-tax TDS?

For this chapter in Paper 3 Section B, TDS and TCS mean the GST provisions under Sections 51 and 52 of the CGST Act, 2017. Income-tax TDS belongs to Section A and uses the Income-tax Act, 2025.

What is the threshold for TDS under GST?

TDS applies when the total value of supply under a contract exceeds ₹2,50,000. The value is taken excluding the GST shown on the invoice.

What is the rate of TCS for e-commerce operators?

The total rate is 0.5% of the net value of taxable supplies. It is split as 0.25% CGST plus 0.25% SGST for intra-state supplies, or 0.5% IGST for inter-state supplies.

How should I answer a TDS question in the exam?

Check whether the recipient is a notified deductor, whether the contract value exceeds ₹2,50,000, then compute 2% on the value excluding GST. Show the CGST, SGST or IGST split and add the due dates if the question asks.