The 50% option applies to eligible credit, not every GST amount in the books
A banking company or financial institution, including an NBFC, engaged in accepting deposits or extending loans or advances can choose the section 17(4) monthly 50% eligible-ITC option instead of the section 17(2) apportionment route. Under the option, remove ineligible/non-business credit first, separately identify otherwise admissible same-PAN registered-person supplies, then apply 50% to the remaining eligible pool. The other half lapses; it is not an ordinary temporary reversal awaiting a later reclaim.
This guide is checked on 23 October 2026 against section 17(4), rule 38 and the 2026 GST bare-law compilation, CBIC Circular 170/02/2022-GST dated 6 July 2022 and CBIC banking-sector guidance. It addresses the covered institution acting as recipient, not an ordinary trader merely earning incidental interest or a customer buying banking services.
Document the election before preparing the monthly working
Section 17(4) gives a choice; it does not impose a universal 50% haircut on every lender. Confirm the entity and activity fall within the statutory population, establish which route has actually been chosen, and preserve the financial-year decision. Apply and document the election for each GST registration; CBIC’s banking-sector guidance explains that section 17(4) operates registration-wise rather than for the bank as a whole. Once exercised, the option cannot be withdrawn during the remaining financial year. A favourable month under a different computation is not permission to switch the election retrospectively or alternate methods each month.
The statutory option includes eligible credit on inputs, capital goods and input services. It does not override section 16 conditions or section 17(5) blocks. A fixed-asset invoice is not automatically fully creditable, and this monthly option is not a direction to spread the selected 50% over a generic sixty-month period. Analyse any independent capital-goods eligibility or reversal issue on its own facts.
Use mutually exclusive pools and retain a complete reconciliation
| Pool | Treatment in the option working | Required control |
|---|---|---|
| Ineligible/non-business amounts | Exclude rather than claim half | Invoice-level legal reason; avoid counting the same blocked amount twice |
| Otherwise eligible same-PAN registered-person supplies | Separate from the 50% pool; the statutory restriction does not apply | Supplier and recipient GSTINs, matching PAN and actual taxable supply evidence |
| Other eligible monthly input tax | Claim 50%; the balance lapses | Tax-head-wise eligible base and permanent reversal working |
| Credit not yet satisfying an independent condition | Keep outside a current admissible base until the condition is satisfied | Separate reason and appropriate return treatment; no automatic credit from book entry |
| Return reconciliation | Reconcile gross reporting, all exclusions/reversals and net ITC | GSTR-3B, supporting statements and electronic credit ledger |
The same-PAN exception concerns tax on supplies between registered persons having the same PAN. A group company with a different PAN is not covered merely because it is wholly owned or shares a brand. The exception also does not cure blocked credit or a non-business use: rule 38(b) excludes amounts falling under its ineligibility clause. Avoid both errors—halving all admissible inter-branch credit and granting full credit to a legally ineligible inter-branch item.
Keep the bank’s own output tax separate from this input-credit percentage
The 50% percentage here measures admissible input credit under an elected method. It is not the tax rate on banking income, the taxable proportion of an invoice, or an instruction that half of every customer fee is exempt. Reconcile input invoices and credit heads independently of output-supply valuation and liability. Reverse-charge tax payment, where applicable, also requires its own payment and eligibility analysis before any resulting credit enters this model.
Work tax head by tax head. IGST, CGST and SGST/UTGST must remain distinguishable in the return and ledger. The examples use exact whole-rupee amounts to isolate the method; a live system should preserve calculation precision and apply the relevant statutory/return rounding consistently, rather than rounding every invoice pool differently.
Permanent lapse needs the correct GSTR-3B treatment
Circular 170 identifies rule 38 reversals as absolute and non-reclaimable and places them in Table 4(B)(1). Do not park the lapsed half in a temporary-reversal tracker with an assumed later recovery. Other genuinely temporary eligibility reversals require their own classification under the current return instructions. Reconcile the filed net figure with the electronic credit ledger; a book balance labelled “GST receivable” is not evidence that the full amount remains claimable.
For a month-end review, reconcile books, supporting invoice data and the actual return, then explain differences as blocked/non-business, same-PAN eligible, other eligible, lapsed, or separately deferred for a stated reason. Do not infer that an auto-populated figure has already applied the institution’s election. Preserve the decision and evidence so a reviewer can reproduce the computation without guessing which invoices were halved.
Worked illustrations
These illustrations use fictional facts and expressly stated assumptions. Amounts are Indian rupees unless a different currency or unit is specified. They are independent examples, not findings about any actual client.
Illustrative example 1: Only ordinary eligible third-party credit
A covered institution using the option has ₹2,00,000 otherwise eligible third-party ITC for the month and no same-PAN or excluded amounts in this isolated case. Admissible ITC is 50% × ₹2,00,000 = ₹1,00,000. The other ₹1,00,000 lapses; it is not saved for next month.
Illustrative example 2: Remove disjoint exclusions first
Total input tax in the working is ₹2,40,000, including a separately identified ₹30,000 statutory block and ₹10,000 non-business amount, with no overlap. Remaining eligible credit is ₹2,00,000. Claim ₹1,00,000 under the option. Total excluded or lapsed amount is ₹30,000 + ₹10,000 + ₹1,00,000 = ₹1,40,000.
Illustrative example 3: Separate eligible same-PAN supplies
Total otherwise eligible ITC is ₹3,00,000, comprising ₹80,000 on qualifying same-PAN registered-person supplies and ₹2,20,000 other eligible ITC. Admissible credit is ₹80,000 + 50% × ₹2,20,000 = ₹1,90,000. The lapsed other-pool half is ₹1,10,000; do not halve the full ₹3,00,000.
Illustrative example 4: Same PAN does not cure a block
Same-PAN invoice tax totals ₹60,000, of which ₹10,000 is independently ineligible on the assumed facts. Other eligible ITC is ₹1,40,000. Admissible credit is ₹50,000 + ₹70,000 = ₹1,20,000. The blocked ₹10,000 plus the other-pool lapse ₹70,000 total ₹80,000. The exception does not make the blocked item eligible.
Illustrative example 5: Capital goods under the monthly option
Assume ₹1,80,000 credit on third-party business capital goods becomes otherwise eligible in the month, with no independent block or depreciation-on-tax-component issue. Under the elected section 17(4) option, admissible credit from this item is ₹90,000 and the other ₹90,000 lapses. The example does not prescribe an instalment recovery of the lapsed half.
Illustrative example 6: A new month does not revive the old half
Other eligible pools are ₹80,000 in month one and ₹40,000 in month two, with no same-PAN amounts. Claims are ₹40,000 and ₹20,000 respectively: total ₹60,000. The combined lapsed amount is also ₹60,000. Month two’s claim is not increased by month one’s ₹40,000 lapse.
Illustrative example 7: Preserve the tax heads
Eligible CGST is ₹60,000, comprising same-PAN ₹12,000 and other ₹48,000; eligible SGST has the same split. Each admissible head is ₹12,000 + ₹24,000 = ₹36,000. Eligible IGST is ₹90,000, comprising same-PAN ₹10,000 and other ₹80,000: admissible IGST ₹50,000. Total admissible credit is ₹1,22,000; lapse is ₹88,000, reconciling to ₹2,10,000 eligible input tax.
Ten-step verification table
| Step | Verification | Evidence to retain |
|---|---|---|
| 1 | Confirm the statutory institution and activity | Bank/FI/NBFC status and deposit/lending activity evidence |
| 2 | Confirm the chosen financial-year method | Dated section 17(4) election and consistency review |
| 3 | Reconcile the complete monthly input-tax population | Invoice, books and supporting statement reconciliation |
| 4 | Remove ineligible/non-business amounts | Distinct reasons with no duplicate exclusions |
| 5 | Validate same-PAN registered-person supplies | Both GSTINs, PAN matching and supply/tax documentation |
| 6 | Keep capital goods separately identifiable | Eligibility, capitalisation and tax-component review |
| 7 | Calculate each tax-head eligible pool | Same-PAN and remaining-credit schedules |
| 8 | Compute the 50% claim and permanent lapse | Reproducible calculation with controlled rounding |
| 9 | Map permanent reversals to the return | GSTR-3B Table 4(B)(1) and separate temporary items |
| 10 | Reconcile net ITC and accounting treatment | Filed return, electronic credit ledger and non-reclaimable balance review |
Sixteen practitioner FAQs
1. Does every business lending money get this option?
No. Establish the statutory banking-company or financial-institution/NBFC population and the specified deposit/lending activities.
2. Is 50% compulsory for every bank?
Section 17(4) provides an alternative to the section 17(2) route. Confirm the method actually selected.
3. Can the institution switch methods every month?
The exercised option cannot be withdrawn during the remaining financial year. Preserve a consistent election trail.
4. Is the percentage applied to gross GST in the books?
No. First establish eligibility and remove the relevant exclusions, then separate the eligible same-PAN pool.
5. Can half of blocked ITC be claimed?
No. The option does not convert section 17(5)-blocked or otherwise ineligible credit into admissible credit.
6. Are capital goods outside section 17(4)?
The statutory text includes eligible credit on capital goods. Apply eligibility conditions and the option without inventing a blanket capital-goods exemption.
7. Is the lapsed half a temporary reversal?
No. Section 17(4) says the rest lapses, and Circular 170 identifies rule 38 reversals as non-reclaimable.
8. Where does the rule 38 reversal belong in GSTR-3B?
Circular 170 places this permanent reversal in Table 4(B)(1). Reconcile it with the current return instructions and filed figures.
9. Can the unused half be claimed next month?
Not merely because another month or financial year starts. Do not carry the lapsed amount as an automatic reclaim.
10. Does a group-company invoice qualify for full same-PAN treatment?
Only common ownership is insufficient. Verify the actual supplier and recipient registrations have the same PAN and that the supply is otherwise eligible.
11. Does the same-PAN exception remove all credit conditions?
No. Rule 38 keeps independently ineligible/non-business amounts outside the exception’s admissible pool.
12. Can IGST, CGST and SGST be combined into one ledger amount?
Use a consolidated control total if useful, but retain separate tax-head computations and return/ledger reconciliation.
13. Does auto-population determine the allowable claim?
No. The recipient must ascertain exclusions and reversals, including its selected bank-credit method.
14. Is this the GST rate on loan interest or banking fees?
No. This article concerns input-credit admissibility. Output exemption, valuation and tax liability are separate analyses.
15. Does paying reverse-charge tax guarantee full credit?
No. Payment and underlying eligibility are separate. Any admissible credit must still be classified under the applicable elected method.
16. What should the audit file explain about GST receivable?
Reconcile the accounting balance with admissible ledger credit, permanent lapse and separately supported pending eligibility items. Do not leave the lapsed half presented as an unexplained recoverable asset.
Conclusion
Make the elected method explicit, preserve separate eligibility pools and treat the lapsed half as permanent. Reconcile the resulting tax-head figures to the filed return and credit ledger.