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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsGST input tax credit (ITC) lets a registered person offset eligible GST paid on business inputs against output GST. It is not an automatic refund or a right created by an invoice alone: registration, business use, prescribed documents, receipt, tax and return conditions, apportionment rules, blocked-credit provisions, payment tracking and the statutory deadline all matter.
This guide explains the compliance workflow for Indian GST-registered businesses and accounts teams. The result for any invoice depends on the facts, the taxpayer’s registration and the law in force when the claim is made.
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What GST input tax credit means
Section 16(1) of the Central Goods and Services Tax Act, 2017 (CGST Act) states that a registered person may take credit of input tax charged on goods or services used, or intended to be used, in the course or furtherance of business, subject to prescribed conditions and restrictions and the manner specified in section 49. The eligible amount is credited to the taxpayer’s electronic credit ledger and can be used under the GST payment mechanism.
That definition has several gates. A purchase can be genuinely connected with a business and still fail because the claimant lacks a valid tax document, has not received the supply, has not met a return condition, is claiming a blocked category, has not apportioned common use, has crossed the claim deadline, or has not dealt with the 180-day payment rule.
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Invoice data visible in an online statement is useful evidence, but it does not by itself prove every statutory condition. The registered person remains responsible for deciding what is eligible and for reversing or excluding amounts that are not.
Eligibility: the conditions to test before claiming ITC
Use the following sequence for each invoice, debit note or other credit entry. Keep the conclusion and supporting evidence with the accounting record.
| Test | What to verify | Typical evidence or action |
|---|---|---|
| Registered claimant | The person taking credit is registered under GST for the relevant period. | GSTIN, registration status and return period. |
| Business purpose | Goods or services are used, or intended to be used, in the course or furtherance of business. | Purchase order, cost centre, contract, project file or internal-use explanation. |
| Prescribed document | A valid tax invoice, debit note, bill of entry or other document permitted by the Act and rules is held. | Document number, date, supplier GSTIN, taxable value, tax breakup and linkage to the ledger. |
| Receipt | The goods or services have been received. For goods delivered in lots, credit follows receipt of the last lot. | Goods receipt note, delivery challan, transport record, service acceptance or completion evidence. |
| Tax and return conditions | Conditions concerning tax payment to government and filing the prescribed return are satisfied. | Supplier and return checks; do not treat auto-population as the only test. |
| Use and apportionment | Only the portion attributable to eligible business and taxable or zero-rated supplies is retained. | Allocation working and rule-based reversal for common use. |
| Blocked-credit screen | Section 17(5) and its exceptions have been checked against the actual facts. | Documented legal classification and approval for unusual cases. |
| Time limit | The claim is made by the applicable statutory cut-off, including any current amendment. | Return calendar tied to the financial year and annual-return position. |
Receipt of goods or services
Receipt is a separate condition from holding an invoice. For goods, retain evidence that the consignment arrived or that the statutory deemed-receipt rule applies. The Act recognises deemed receipt where goods are delivered to another person on the registered recipient’s direction. For services, retain a contract, work order, acceptance, completion certificate, usage record or other evidence that the service was supplied.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWhen a consignment is received in lots or instalments, the Act ties ITC to receipt of the last lot. Do not claim the full amount merely because the first delivery or the invoice has arrived.
Tax document requirements
CBIC’s input-tax-credit rules identify invoices, debit notes, bills of entry and specified Input Service Distributor documents among the records that support credit. Check that the document is issued to the correct GSTIN and that values, tax rates and place-of-supply details are consistent with the transaction. A typo, duplicate document or document for a different entity should be placed on an exception list while the supplier correction is obtained.
Mixed use, exempt supplies and the 5 per cent rule
Business use alone does not make the entire tax amount creditable. Where an input or input service serves both business and non-business purposes, or both taxable or zero-rated and exempt supplies, credit must be restricted to the attributable eligible amount. The CGST Rules prescribe the calculation and reversal method; apply the prescribed formula rather than an informal percentage.
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In the specified calculation context for common inputs or input services used partly for business and partly for non-business purposes, the rules prescribe an amount equal to five per cent of common credit as attributable to non-business use. This figure is a rule-based calculation in that context, not a general allowance or a substitute for analysing actual use.
Maintain a working paper showing the common pool, the business and non-business or taxable and exempt allocation, the rule used, and the reversal posted. Revisit the allocation when the pattern of use changes.
Blocked credits under Section 17(5)
Section 17(5) makes specified categories of input tax unavailable, subject to exceptions written into the provision. The correct approach is to classify the transaction against the current statutory text and the facts supporting any exception. Do not use a broad rule such as “all business expenses qualify” or “everything in a particular expense account is blocked.”
Configure the accounting review so that a potentially blocked category is held for a fact-specific check before it enters the eligible-ITC total. Record the reason for exclusion or the precise exception relied on. Because the list and exceptions can be amended, check the law applicable to the relevant tax period.
Records and audit trail to maintain
CBIC’s account rules require records covering tax payable, tax collected and paid, input tax and ITC claimed. They also require registers of tax invoices, credit notes, debit notes and delivery challans issued or received during each tax period.
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|---|---|---|
| Invoice and debit-note register | Document number and date, supplier, GSTIN, taxable value, tax components, posting and status. | Supports document validity, duplicate detection and period reporting. |
| Receipt and delivery file | Goods receipt, delivery challan, transport evidence, service acceptance and lot-wise records where relevant. | Supports the receipt condition and the last-lot rule. |
| Tax and ITC accounts | Input tax booked, eligible credit, exclusions, reversals, reclaimable amounts and ledger movement. | Explains how books reconcile to the return. |
| Stock account | Opening balance, receipts, supplies, losses, disposals and closing balance. | Provides a trail for goods-based inputs and unusual movements. |
| Import, export and reverse-charge records | Relevant bills of entry, shipping or export records, self-invoices or other prescribed documents and payment details. | Supports special tax treatments and separate eligibility analysis. |
| Reconciliation exceptions | Missing, mismatched, duplicated, ineligible or later-corrected items, with owner and resolution date. | Prevents unresolved differences from flowing into net ITC. |
Electronic records are permitted. The rules require safeguards such as edit and delete logs for electronic entries and authentication by digital signature where the rule so provides. Preserve records for the period required by Section 36. The exact retention duration should be checked in the current Section 36 text for the relevant period rather than assumed from an old checklist.
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A practical audit trail connects each ITC line to the prescribed document, purchase order or contract, receipt evidence, accounting entry and corresponding GSTR-2B item where applicable. This linkage is workflow advice based on the record categories and reconciliation requirements; it does not replace a statutory condition.
The 180-day payment condition
Where the value of a supply plus tax remains unpaid to the supplier for 180 days from the invoice date, the applicable proportionate credit is subject to reversal with interest through the prescribed process. Track the due date at invoice level, including partial payments, instead of relying on an ageing report that contains only vendor totals.
The condition does not apply to reverse-charge supplies. Credit relating to an unpaid ordinary purchase can be taken again after payment, subject to the Act and rules. Keep the original reversal, payment proof and reclaim entry together so that a temporary adjustment is not mistaken for a permanent loss.
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ITC claim deadline
Section 16(4) ties the deadline to the September return due date following the end of the financial year or the relevant annual return, whichever is earlier, subject to current amendments and the actual due date. The wording is not a universal calendar date: the applicable financial year, annual-return filing and any amendment must be checked for the claim.
Build a year-end schedule that lists unclaimed invoices, credit-note adjustments, supplier corrections and unresolved GSTR-2B differences. Escalate items approaching the applicable cut-off instead of waiting for the annual return process.
How GSTR-2B review connects to GSTR-3B
GSTR-2B is an important reconciliation statement, not a blanket approval. CBIC Circular 170/02/2022-GST explains that information flows to Table 4 of GSTR-3B, including eligible and ineligible items, with stated exceptions. The registered person must identify ineligible credit and required reversals before calculating net ITC.
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- Collect the period data. Download GSTR-2B, the purchase register, the general-ledger extract and prior-period exception reports for the same GSTIN and tax period.
- Match at invoice level. Compare supplier GSTIN, document number, date, taxable value and tax components. Mark missing, duplicate, amended and timing-difference items.
- Test eligibility. Apply business-use, receipt, document, tax and return conditions, Section 17(5), mixed-use apportionment and the 180-day status. Separate reverse-charge entries for their distinct treatment.
- Classify reversals. Identify permanent exclusions and reversals that may be reclaimed after a condition is met. Keep the reason and supporting document for each line.
- Prepare Table 4 inputs. Use the current GSTR-3B instructions and form. The 2022 circular describes eligible and ineligible amounts in Table 4, but later instructions can change the operational presentation.
- Review and approve. Have a preparer and reviewer sign off the reconciliation, unresolved exceptions, reversals and net-ITC calculation before filing.
| Table reference described in Circular 170/02/2022-GST | Role in the described workflow |
|---|---|
| Table 4(A)(5) | Eligible reclaimable amounts may be reclaimed after the relevant condition is fulfilled. |
| Table 4(B)(1) | Permanent reversals, including specified reversals under Rules 38, 42 and 43 and Section 17(5) credits, are described here. |
| Table 4(B)(2) | Non-permanent reversals that may be reclaimable after conditions are fulfilled are described here. |
| Table 4(C) | Net ITC is described as 4(A) minus 4(B)(1) and 4(B)(2). |
| Table 4(D)(1) | Eligible reclaimable amounts are described as being shown here when reclaimed. |
These references come from a 2022 circular. Confirm the current return form and subsequent CBIC instructions before filing a period-specific return.
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Permanent versus reclaimable reversals
Not every reduction in the ITC ledger has the same consequence. Circular 170/02/2022-GST distinguishes permanent reversals, such as specified Rule 38, 42 and 43 reversals and Section 17(5) credit, from reversals caused by an unmet condition that can be reclaimed once the condition is satisfied.
| Type | Example of status | Control needed |
|---|---|---|
| Permanent reversal | Credit is unavailable under the applicable blocked-credit or prescribed apportionment provision. | Exclude from future reclaim schedules and retain the legal classification. |
| Potentially reclaimable reversal | Credit is temporarily reversed because a condition, such as supplier payment, has not yet been met. | Track the trigger, evidence and period in which reclaim is permitted. |
Use separate ledger codes and exception reports for the two categories. Mixing them creates either an overclaim or an unnecessary permanent write-off.
Common mistakes and how to correct them
Assuming a business purchase is automatically eligible
Business purpose is only one condition. Add document, receipt, tax, return, apportionment, blocked-credit, deadline and payment tests to the approval workflow.
Claiming the entire value of shared costs
Identify non-business and exempt-supply use, apply the prescribed calculation, and post the required reversal. Retain the allocation working rather than a conclusion with no basis.
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GSTR-2B can contain eligible and ineligible information. Reconcile it to books and transaction evidence, investigate supplier errors and calculate net ITC only after exclusions and reversals.
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Missing the 180-day review
Age unpaid invoices from their invoice dates, monitor partial settlement and schedule reversal and later reclaim where permitted. Reverse-charge supplies are treated differently under this condition.
Missing the statutory cut-off
Maintain a financial-year tracker linked to the September return due date and annual-return status. Confirm amendments and the actual due date before making a claim.
Keeping only one ITC ledger total
An aggregate balance does not replace invoice, tax, stock, import, reverse-charge and delivery records. Preserve the document-to-return trail.
Calling every reversal permanent
Classify the reason. A reversal for an unmet condition may be reclaimable; a blocked or prescribed permanent reversal is not. Use distinct codes and review dates.
A monthly ITC close checklist
- Download the current GSTR-2B and lock the period’s purchase register.
- Match documents and flag missing, duplicate, amended and timing-difference invoices.
- Confirm receipt, including the last lot for instalment deliveries.
- Check business use, exempt-supply use, non-business use and the prescribed apportionment.
- Screen Section 17(5) and document any applicable exception.
- Age unpaid invoices and identify 180-day reversals and later reclaim candidates.
- Check the claim deadline for older invoices and unresolved supplier corrections.
- Prepare the current GSTR-3B Table 4 working, separating eligible ITC, permanent reversals and potentially reclaimable reversals.
- Reconcile the return figures to the electronic credit ledger and retain reviewer approval.
What to verify before filing or relying on this guide
GST law, notifications, due dates and return-form instructions can change. Before filing a specific claim, verify the current CGST Act and Rules, Section 17(5) exceptions, Section 36 retention requirement, applicable Section 16(4) amendment, current GSTR-3B instructions and any later CBIC clarification. For a disputed or unusual transaction, obtain transaction-specific professional advice rather than treating this general explainer as a determination.
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