GSTR-3B Input Tax Credit: How to Claim, Reverse and Reclaim It

Input tax credit, or ITC, is eligible GST on your business purchases that you can use towards GST payable on your sales and services. In GSTR-3B, you report this credit, deduct required reversals and include earlier reversed credit that has become eligible again.

The practical question is: how much credit can your business actually use this period? Start with your purchase invoices and business accounting records, rather than accepting the automatically filled total without review.

This guide covers credit adjustments and payment using credit. The separate GSTR-3B filing guide covers filing steps, due dates and late fees.

How do you compare purchases with GSTR-2B?

Download GSTR-2B and compare it with your purchase register. Match the supplier GSTIN, invoice number, invoice date, taxable value and GST amount. Include purchase credit notes and debit notes in the comparison.

For each difference, identify what needs to happen:

For example, your September 2026 purchase register shows ₹50,000 GST, but ₹8,000 relates to ordinary supplier invoices missing from GSTR-2B. Do not manually add ₹8,000 just to make the totals match. Follow up with those suppliers and claim the credit when the reporting and other eligibility conditions are met.

The Invoice Management System, or IMS, lets you review supplier-reported documents. If your actions change the statement, generate the updated GSTR-2B before preparing GSTR-3B. Keep unresolved invoices in a separate list so they are followed up next period.

Import and reverse-charge credit need separate review; the ordinary supplier-invoice comparison does not cover every credit category.

Does an invoice in GSTR-2B automatically qualify for credit?

No. Confirm that the invoice belongs to the correct GST registration, relates to business use, and meets the receipt and other credit conditions. Some purchases are specifically excluded from credit even when GST has been charged.

For example, a proprietor's personal purchase does not become eligible merely because the seller used the business GSTIN. Likewise, an invoice appearing in GSTR-2B does not establish that the goods have been received.

Keep the invoice, receipt or delivery evidence, supplier payment details and the reason supporting the claim. These records help explain your figures if the department asks about the credit.

Which credit should you reverse, and when can you reclaim it?

A reversal removes credit from the amount available to your business. Some reversals are permanent; others can be reclaimed after the relevant condition is met.

Credit that cannot be retained

Credit relating to personal use or a specifically blocked purchase cannot be retained simply because it appears in GSTR-2B. The treatment depends on the purchase; not every vehicle, travel or construction expense follows the same rule.

Businesses making both taxable and exempt supplies must also calculate the adjustment for shared expenses. Credit relating exclusively to eligible taxable business activity should be separated from common expenses before making this calculation. Common capital assets require their own calculation, and applicable annual adjustments must also be completed.

Example: a trader sells taxable and exempt goods. In September 2026, taxable sales are ₹8,00,000 and exempt sales are ₹2,00,000. Total sales, excluding GST, are ₹10,00,000. After separating purchases used exclusively for each activity and blocked credit, GST on shared expenses such as warehouse rent and accounting charges is ₹20,000. Assume these expenses are entirely for business, with no capital-goods credit or other adjustment.

Report the ₹4,000 reversal in Table 4(B)(1). Credit exclusively relating to exempt activity is excluded separately; do not apply 20% to every purchase. This is the monthly common-expense calculation under Rule 42, with the applicable annual adjustment still required.

Goods have not yet been received

An invoice in GSTR-2B is not enough: the goods must also have been received before credit is claimed. Section 16(2)(b) sets this condition. Certain deliveries to another person on your instructions also count as receipt.

Suppose an August 2026 invoice carrying ₹9,000 GST appears in GSTR-2B, but the goods arrive in September 2026. Assume none of those special receipt arrangements applies.

If the ₹9,000 appears in August's Table 4(A), deduct it in Table 4(B)(2), so it does not become usable August credit. After receipt in September, claim it when the other conditions are satisfied. CBIC Circular 170 explains this temporary reversal and reclaim treatment. Keep the delivery record with your working sheet.

You have not paid the supplier within 180 days

Section 16(2), second proviso, requires adjustment of credit when the invoice value and GST are not paid to the supplier within 180 days. Rule 37 gives the proportionate reversal or repayment treatment and refers to interest under Section 50. Reverse-charge purchases are excluded from this 180-day condition.

Example: A January 2026 invoice is ₹1,00,000 plus ₹18,000 GST, totalling ₹1,18,000. You claimed ₹18,000 credit but paid only ₹59,000 within 180 days.

Half the invoice remains unpaid, so the related credit adjustment is:

₹18,000 × ₹59,000 ÷ ₹1,18,000 = ₹9,000.

When the remaining amount is paid, reclaim the eligible ₹9,000 and retain payment proof.

What about interest? Interest must also be considered; the law does not say that reversal alone always completes the adjustment. Determine the chargeable period from the claim, utilisation, reversal and payment records. Do not automatically use the invoice date or assume that interest starts only on day 181.

For illustration, if ₹9,000 attracts interest at 18% for a confirmed chargeable period of 90 days in 2026:

₹9,000 × 18% × 90 ÷ 365 = approximately ₹399.

The ₹9,000 credit adjustment and ₹399 interest are separate. Interest is paid through cash and is not reclaimed as ITC when the supplier is paid. The 90 days is an illustration, not a universal interest period for unpaid invoices.

The supplier reported the invoice but did not file GSTR-3B

Invoice reporting and GSTR-3B filing are separate. For credit claimed during financial year 2025–26, if the supplier has not filed the corresponding GSTR-3B by 30 September 2026, the prescribed reversal must be completed by 30 November 2026. Do not confuse this with filing the November return in December.

Credit may be reclaimed when the supplier subsequently files the relevant return. Track affected invoices individually; if credit on an invoice has already been reversed for another reason, avoid reversing the same amount twice. The supplier-payment and non-filing requirements are covered in the official GST rule amendments.

How do you reclaim earlier reversed credit?

Reclaim means taking back credit that you previously removed because a condition was not met. First confirm that the condition is now satisfied and that the credit was actually reversed earlier.

Use the goods-receipt example above. You removed ₹9,000 in August 2026 because the goods had not arrived. They arrive in September 2026, so that ₹9,000 becomes eligible, assuming the other conditions are met.

You receive ₹49,000 credit, not ₹58,000. Table 4(D)(1) only identifies the ₹9,000 reclaim already included in the total. Do not wait for the old invoice to appear again in GSTR-2B, and do not claim it twice if it does appear again.

The portal's reversal-and-reclaim statement helps track earlier reversals. Its balance does not prove that every amount is eligible to reclaim; reconcile it with your invoice-wise working sheet.

How does a purchase return affect your credit?

A purchase return commonly results in the supplier issuing a GST credit note. Reduce the related credit to reflect the goods returned, without deducting the same amount twice. Credit notes can also arise from eligible price reductions; they are not limited to purchase returns.

Example: You purchase goods in August 2026 and claim ₹18,000 GST. In September 2026, you return some goods and the supplier issues and reports a GST credit note carrying ₹3,600 GST.

August's filed return is not revised. Account for the ₹3,600 reduction in September. If September's credit on other purchases is ₹25,000 and the auto-filled figure already deducts the credit note, it will show ₹25,000 − ₹3,600 = ₹21,400. Do not deduct another ₹3,600 from that figure.

If the reduction is not included, account for the required adjustment and track the supplier's reporting. If the original credit was never claimed or was already reversed, establish the actual reduction required. The relevant IMS facilities address these situations. GST Council's October 2025 update

Can reverse-charge GST be paid using credit?

No. Pay applicable reverse-charge GST through the cash ledger. Eligible related credit can be claimed in the same return period in which the reverse-charge tax is paid; there is no general requirement to wait until the next period.

For example, assume your business receives legal services from an advocate in September 2026 and must pay ₹1,800 GST under reverse charge. Even with ₹50,000 purchase credit available, pay the ₹1,800 through cash. Subject to eligibility, report the related ₹1,800 credit in Table 4(A)(3) of September 2026 GSTR-3B. Filing that return in October does not make the credit an October-period claim. The credit cannot replace the cash payment of reverse-charge GST. CBIC sectoral FAQs

Review the nature of the expense and the supplier. A purchase from an unregistered person does not automatically attract reverse charge.

Which GST credit can pay which tax?

Your electronic credit ledger keeps separate balances for CGST, SGST, UTGST and IGST. The balance under each heading can pay the permitted GST liabilities; you cannot combine all balances and use them freely against any tax.

• CGST: Central Goods and Services Tax, the central component normally charged on a supply within a State or relevant Union Territory.
• SGST: State Goods and Services Tax, normally charged with CGST on supplies within a State.
• UTGST: Union Territory Goods and Services Tax, charged with CGST where the UTGST system applies.
• IGST: Integrated Goods and Services Tax, generally charged on interstate supplies and imports.

These are balances within one GST registration, not permission to transfer credit between GSTINs.

Follow this order when using credit

1. Use IGST credit against IGST first. Use the remaining IGST credit against CGST and SGST or UTGST in any order and proportion, before using those other credits.
2. Use CGST credit against CGST first, then against remaining IGST.
3. Use SGST or UTGST credit against its own tax first, then against remaining IGST, after available CGST credit for IGST has been used.

CGST credit cannot pay SGST or UTGST, and those credits cannot pay CGST. Remaining IGST credit need not be divided equally. Official credit utilisation clarification

Example for September 2026: GST payable is IGST ₹10,000, CGST ₹20,000 and SGST ₹20,000. Available credit is IGST ₹30,000, CGST ₹5,000 and SGST ₹10,000.

All ₹45,000 credit is used and ₹5,000 SGST remains payable in cash. This assumes eligible credit and no additional cash-payment restriction. Reverse-charge GST, interest, late fees and penalties require cash; compensation cess credit, where applicable, pays only that cess.

What do the credit fields in Table 4 mean?

Not every amount in 4(B)(2) can be reclaimed. Similarly, putting an amount in 4(D) does not reverse credit already included in 4(A). The official Table 4 clarification explains this distinction.

How do adjustments affect usable credit and the ledgers?

Assume September 2026 has the following figures, equally divided between CGST and SGST:

The ₹10,000 reclaim disclosure is already included in ₹90,000; it is not added again.

Now assume GST payable is ₹1,00,000, equally split between CGST and SGST, with eligible opening credit of ₹10,000 also equally split.

The electronic credit ledger receives the net credit claimed through GSTR-3B. Using ₹85,000 towards payment reduces its balance to zero. An invoice appearing in GSTR-2B alone does not add money to this ledger.

The electronic liability register records the GST payable and its settlement. In this example, ₹1,00,000 is settled using ₹85,000 credit and ₹15,000 cash. ITC changes the payment requirement, not the GST charged to customers.

The electronic cash ledger holds deposited money. A deposit settles the liability only when the balance is used towards payment. If ₹3,000 is already available under the required headings, the additional deposit is ₹12,000.

What if the reversal is more than this period's credit?

An ITC reversal can create a cash payment even when you have no sales. If the credit being removed is more than current credit and there is no usable opening balance, current purchases cannot absorb the full reversal.

For example, in September 2026 you have ₹5,000 eligible current credit but must reverse ₹12,000 previously claimed credit. Assume no opening credit, no sales GST and no other adjustment, with matching tax headings.

The current credit absorbs ₹5,000; the remaining ₹7,000 requires cash settlement through the applicable return or repayment treatment. Any interest is additional. A negative net credit figure is not credit you can carry forward and use later.

Can I postpone the reversal because there are no sales?

No. Having no sales does not remove a required reversal. Identify the period in which the adjustment is due and settle any resulting shortfall.

Does every reversal require a cash payment?

No. Current eligible credit and usable opening credit may absorb the adjustment. Cash is needed for any remaining shortfall, subject to the permitted use of each tax balance. Interest must be paid in cash separately.

Will more purchases next month remove this month's shortfall?

No. Future eligible credit does not justify delaying an adjustment already due. If a temporary reversal later becomes eligible for reclaim, claim it in that later period with supporting records.

Keep an invoice-wise reversal and reclaim record

Before filing, reconcile current claims, previous claims, credit notes, reversals and reclaims. Confirm that each reclaim has supporting evidence and has not been counted twice. Retain the working sheet with the filed return.

If supplier mismatches or earlier reversals are difficult to resolve, our GST return filing services in Chennai can help reconcile the records and prepare the adjustments.