“ITC meaning” searches usually end at a one-line answer. An accountant needs the next layer: which GST counts, which conditions apply before the credit is yours, and where GSTR-2B fits. This guide gives the definition, the conditions clause by clause, and a September 2026 example in which five purchase invoices produce three outcomes.
What input tax credit means in the CGST Act
Two definitions in Section 2 of the CGST Act carry the whole idea. Clause (63) is short:
“"input tax credit" means the credit of input tax;” Section 2(63), CGST Act
So the real definition is in clause (62), input tax. In relation to a registered person it means the central tax, State tax, integrated tax or Union territory tax charged on any supply of goods or services or both made to him. The clause adds the integrated tax charged on import of goods and the tax payable under sub-sections (3) and (4) of Section 9, and it states that input tax “does not include the tax paid under the composition levy”.
In practice: when a supplier charges you ₹22,320 as GST on a tax invoice, that ₹22,320 is your input tax. It becomes input tax credit only when you are entitled to take it and do take it. The entitlement is the subject of the rest of this page.
Who is entitled, and for what
Section 16(1) gives every registered person the entitlement, subject to the conditions and restrictions prescribed, for input tax on supplies “used or intended to be used in the course or furtherance of his business”. The credit is then credited to the electronic credit ledger. Two features of that sentence matter for reconciliation.
- Business use is a test of its own. Where use is partly for business and partly for other purposes, Section 17(1) restricts credit to the business part.
- The entitlement is subject to restrictions. Section 17(5) opens with “Notwithstanding anything contained in sub-section (1) of section 16” and lists items on which credit “shall not be available”. These are blocked credits: an invoice for such an item can match GSTR-2B and still carry no credit.
The conditions in Section 16(2) at a glance
Section 16(2) says no registered person is entitled to credit “unless” the listed conditions are met. With the provisos and sub-sections (3) and (4), these are the tests an invoice has to pass.
| Condition | What the Act says | Can reconciliation show it? |
|---|---|---|
| Section 16(2)(a) | You hold a tax invoice or debit note issued by a registered supplier, or other prescribed tax-paying documents | Partly: the invoice is in your books |
| Section 16(2)(aa) | The supplier has furnished the invoice details in the statement of outward supplies and they have been communicated to you | Yes: the invoice is in GSTR-2B or it is not |
| Section 16(2)(b) | You have received the goods or services. For goods received in lots, credit is available on receipt of the last lot | No: needs your receipt records |
| Section 16(2)(ba) | The ITC details communicated to you under Section 38 have not been restricted (in force from 1 October 2022) | Check the portal: we have not verified what triggers a restriction |
| Section 16(2)(c) | The tax charged has been actually paid to the Government, in cash or through utilisation of ITC admissible on that supply | No: this is the supplier's payment, not in your files |
| Section 16(2)(d) | You have furnished the return under Section 39 | No: your own filing status |
| Second proviso to Section 16(2) | Supplier unpaid 180 days from the invoice date (not reverse-charge supplies): an amount equal to the ITC availed is paid with interest under Section 50; credit can be availed again on payment | No: needs your payables ageing |
| Section 16(3) | No ITC on the tax component of capital goods and plant and machinery if you claim depreciation on it under the Income-tax Act, 1961 | No: needs your fixed-asset records |
| Section 16(4) | No ITC after 30 November following the end of the financial year of the invoice, or furnishing of the annual return, whichever is earlier | Partly: sort open items by invoice date |
A reconciliation between your purchase register and GSTR-2B proves one condition outright, supports two more, and says nothing about the rest. That is why “matched” and “eligible” are different words. The guide on what an invoice must satisfy before you claim its ITC takes the receipt, time-limit and 180-day conditions one at a time, and the Section 16(4) guide covers the year-end cut-off.
Not covered here. The 180-day rule is also in Rule 37 of the CGST Rules; the reversal mechanics and interest are outside this page, and so is the Section 17(5) list. Confirm any doubtful invoice with your CA before claiming.
How GSTR-2B decides the ITC you can claim
GSTR-2B is the statement that turns the supplier's side of the transaction into your claim. The path has four steps.
The first link is law, not habit. From 1 January 2022, Section 16(2)(aa) and Rule 36(4) allow credit only on invoices that the supplier has furnished in GSTR-1 (or through the invoice furnishing facility) and that have been communicated to you in GSTR-2B. Before that date a provisional buffer existed, 5% of the eligible credit in its last form; it is gone, so “the supplier will file next week” is not a basis for claiming.
The portal generates GSTR-2B on the 14th of every month for monthly filers, and GSTR-3B is auto-populated from the supplier-reported values and the system-generated GSTR-2B. Table 4(A)(5), “All other ITC”, is populated on a net basis, so credit notes already reduce it. What you do in the Invoice Management System (IMS) changes the statement: records kept Pending do not become part of GSTR-2B or GSTR-3B, and after changing an action you can recompute GSTR-2B when you file GSTR-3B. The steps are in how to recompute GSTR-2B and the IMS decision tree.
Three limits are worth knowing before you file.
- The ITC in GSTR-3B can be edited. The GSTN FAQ says that, “as of now”, the auto-populated values are kept editable, with the edited tile highlighted in red and a warning shown when Table 4A is edited upwards. Nothing stops you typing a larger ITC number. The mismatch notice (DRC-01C) is what follows.
- The ineligible line is narrow. The GSTN description of Table 4D(2) names Section 16(4) and place-of-supply restrictions as what is auto-populated there from GSTR-2B. It does not name Section 17(5). Do not assume the portal has removed blocked credit for you: blocked credit that sits in 2B is reversed in Table 4(B)(1) (CBIC Circular 170/02/2022-GST).
- Table 4 is about the outcome. The same FAQ says only eligible and ineligible ITC need to be declared there. The classification behind those figures is your working paper.
The full chain, including the notice that follows a claim above 2B, is in how GSTR-2B decides the ITC you can claim in GSTR-3B; the contents of the statement are in what GSTR-2B is and why it matters.
Worked example: five invoices, three outcomes
A packaging trader in Nashik closes the September 2026 tax period. Its outward GST for the month is ₹1,86,000. GSTR-2B is generated on 14 October 2026 and GSTR-3B is due on 20 October 2026 for a monthly filer. Five purchase invoices need a decision. The amounts are the GST charged on each invoice.
| Purchase | GST on invoice | In GSTR-2B? | Other check | Claim in this GSTR-3B |
|---|---|---|---|---|
| Kraft paper rolls | ₹52,000 | Yes | Goods received | ₹52,000 |
| Corrugated boxes | ₹14,400 | Yes | Goods received | ₹14,400 |
| Printing ink | ₹21,600 | No | Supplier has not reported it | ₹0, chase the supplier |
| Strapping machine | ₹35,000 | Yes | Still in transit on the supplier's vehicle, not yet received | ₹0 for now |
| Staff lunch catering | ₹3,150 | Yes | Food and beverages are in the Section 17(5) list | ₹0 |
| Total | ₹1,26,150 | ₹66,400 |
GSTR-2B shows ₹52,000 + ₹14,400 + ₹35,000 + ₹3,150 = ₹1,04,550. The claim is ₹1,04,550 − ₹35,000 (receipt condition not met) − ₹3,150 (blocked) = ₹66,400. The three outcomes are:
- Claim now: the kraft paper and the boxes, ₹66,400.
- Claim later: the strapping machine, ₹35,000, in the month the goods are received, and the printing ink, ₹21,600, once the supplier reports it and it appears in a GSTR-2B. Both need the Section 16(4) date not to have passed: for invoices of financial year 2025-26 it is 30 November 2026, or the annual return date if earlier.
- Do not claim: the catering, ₹3,150. Whether the proviso to Section 17(5)(b)(i) applies depends on what the trader sells, so ask your CA.
Against the ₹1,86,000 outward liability, the net balance to pay in GSTR-3B is ₹1,86,000 − ₹66,400 = ₹1,19,600. This treats all the GST as one pool; the rules for setting off credit under different tax heads are not covered here.
Now the wrong way. A trader who claims the whole 2B figure of ₹1,04,550 has claimed ₹38,150 more than the invoices support. That claim does not exceed 2B, so the DRC-01C trigger (ITC claimed in GSTR-3B above ITC available in GSTR-2B, beyond a pre-defined limit) would not fire, yet ₹38,150 would still be credit the Act does not allow. The checks in the table are yours, not the portal's. The DRC-01C guide covers the case in which a claim does exceed 2B.
A short routine for the 14th to the 20th
Reconcile the new GSTR-2B against your purchase register, give every difference a one-line reason, act on IMS and recompute if you changed anything, and keep a dated hold list of invoices that fail receipt, are blocked, or are close to the Section 16(4) date or to 180 days from the invoice. Then claim the eligible figure and never more than the 2B figure for eligible invoices. The 14th-to-20th plan spreads the work across the week.
Frequently asked questions
What is the full form of ITC in GST?
ITC stands for input tax credit. Section 2(63) of the CGST Act defines it as the credit of input tax, and input tax is the GST charged on supplies of goods or services made to you.
Is ITC the same as GSTR-2B?
No. ITC is the credit you are entitled to under the law. GSTR-2B is a statement built from what your suppliers reported, and it sets the ceiling for the invoice-based ITC you can take in GSTR-3B. Receipt of goods, payment of tax to the Government and the time limit are checks that GSTR-2B does not make for you.
Can I take ITC if my supplier has not filed GSTR-1?
No. Since 1 January 2022, Section 16(2)(aa) allows ITC on an invoice only if the supplier has furnished its details in the statement of outward supplies and those details have been communicated to you. Without that, the invoice does not appear in your GSTR-2B.
Is ITC available on every purchase made for the business?
No. Section 17(5) lists goods and services on which input tax credit is not available, and Section 17(1) restricts credit to the part of a purchase that is used for business. Matching an invoice in GSTR-2B does not clear either test.
See which of your invoices pass the first test
Drop the month's GSTR-2B (Excel or JSON) and your purchase register into gstr2bmatch.in. The report puts each invoice in a bucket: matched, value mismatch, in books but missing from 2B, in 2B but not in books, with IMS Pending flagged separately, and totals the ITC at risk in rupees. It cannot judge receipt of goods, supplier payment or blocked credit, so those checks stay with you. Your GSTR-2B and purchase register files are read in your browser and never uploaded to any server.
Guides in this series
- blocked credit in GST: the section 17(5) list with examples
- ineligible input tax credit: eligible vs ineligible ITC
Last checked: 21 October 2026. Sources: CBIC Circular 170/02/2022-GST, CGST Act, Section 2, CGST Act, Section 16, CGST Act, Section 17, Notification 40/2021-CT (Rule 36(4)), CBIC Circular 237/31/2024-GST (Section 16(4)), GSTN GSTR-3B user guide, GSTN return view guide (2B generation), GSTN IMS FAQ, GSTN DRC-01C advisory.