ITR-6 AY 2026–27 Schedule BP Mapping: Form 3CD Clauses, OI Fields, Add-Backs and Later Allowances

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One adjustment needs one tax effect and a traceable destination

For an audited company’s FY 2025–26 / AY 2026–27 return, connect each adjustment to its legal provision, actual book treatment, Form 3CD disclosure and precise Part A-OI/Schedule BP field. Do not paste every disclosed amount into “other disallowance”. Some audit disclosures identify gross transactions, others already identify the inadmissible amount, and some are conditional timing differences. This is a return-mapping workpaper for the 1961 Act return, checked against the notified AY form and validation Annexure 1 on 27 October 2026. AY 2026–27 ITR-6: Part A-OI and Schedule BP.

Start from the profit actually entering Schedule BP

Freeze Schedule BP A1 and the adjustments that remove other-head or exempt income and restore related expenses. A book expense can require an add-back only to the extent its deduction is embedded in the tax starting point and legally inadmissible. For example, income tax booked below profit before tax is not added again merely because it appears somewhere in the accounts. Book depreciation uses the dedicated A11/A12 bridge. A payment of an earlier disallowed liability often needs a tax deduction without a fresh P&L debit; that deduction must carry the original disallowance evidence.

Item-wise audit-to-return map

Legal item	Exact Form 3CD location	AY 2026–27 ITR-6 path	Book-treatment test	Current tax effect	Later allowance or reversal	Minimum evidence
Resident payment: section 40(a)(ia)	21(b)(ii)(A)/(B); cross-check clause 34 withholding data	OI 8A(b) → 8Aj → BP A16	Eligible revenue expense already included in starting profit	30% of the legally affected sum, not 100% of every payment disclosed	Eligible later allowance: OI 8B → BP A30; track the amount previously disallowed	Payee status, TDS obligation, deduction/deposit dates; section 201 proviso/Form 26A relief where legally established
Chargeable nonresident payment: section 40(a)(i)	21(b)(i)(A)/(B); clause 34 supports TDS review	OI 8A(a) → 8Aj → BP A16	Expense included in starting profit	Affected deductible sum under the provision, after testing chargeability, treaty and statutory relief	Eligible later allowance: OI 8B → BP A30	Contract, chargeability/treaty analysis, TDS and remittance evidence; do not apply resident 30% mechanically
Employees’ PF/ESI: section 36(1)(va)	20(b)	OI 6k → 6s → BP A14	Relevant income/deduction reflected in books and tax starting point	Inadmissible contribution measured against the relevant fund-law due date	Later payment does not obtain the employer-contribution section 43B return-date cure	Payroll recovery, fund-wise statutory dates, actual amounts and payment dates
Employer contribution: section 43B(b)	Current liability: 26(B)(a)/(b); prior liability paid: 26(A)(a)	Current OI 11b → 11i → BP A18; prior OI 10b → 10i → BP A31	Deductible employer expense included in starting profit	Unpaid amount not protected by the applicable return-due-date proviso	Prior disallowed amount actually paid in this FY may be deducted once	Separate employer ledger, challans, prior disallowance register
Tax/duty/cess/fee: section 43B(a)	26(B)(a)/(b); prior paid: 26(A)(a)	Current OI 11a → BP A18 via 11i; prior OI 10a → BP A31 via 10i	Deduction otherwise allowable; check whether charged to P&L	Current sum outside the payment-based allowance/proviso	Prior disallowed amount paid during FY 2025–26, without another book deduction	Liability nature, challan dates, tax/P&L treatment and original disallowance
Specified bank interest / leave encashment: section 43B(e)/(f)	26(B)(a)/(b); prior paid: 26(A)(a)	Current OI 11e/11f → BP A18; prior OI 10e/10f → BP A31	Otherwise allowable revenue expense	Applicable unpaid amount after testing the proviso	Payment-year allowance of the previously disallowed deduction	Lender classification or leave ledger, payment proof; other lender categories have separate OI subrows
Micro/small supplier principal: section 43B(h)	Current inadmissible amount: 22(iii)(b); prior disallowed paid: 26(A)(a) with section 43B(h)	Current OI 11h → 11i → BP A18; prior OI 10h → 10i → BP A31	Deductible purchase/service component; avoid an untested gross creditor total	Inadmissible amount after section 15 MSMED timing and actual-payment analysis; return-date proviso excludes clause (h)	Previously disallowed amount actually paid in this FY may qualify; no second book charge required	Supplier eligibility, invoice/acceptance, agreement, payment allocation, inventory/capitalisation and opening ledger
MSMED delayed-payment interest: section 23 MSMED Act	22(i)	OI 17 → BP A19	Interest charged to starting profit	Inadmissible interest separately from supplier principal	No payment-based reversal of this statutory interest bar	Identify the actual MSMED interest; separate it from ordinary borrowing interest
Book versus tax depreciation: section 32	18, including depreciation allowable and closing WDV	Book charge BP A11; allowable tax depreciation BP A12i/A12ii → A12iii; DEP/DPM/DOA as applicable	Book charge already reduces starting profit	Add back the book charge, then deduct eligible tax depreciation separately	Future depreciation follows the tax block/asset basis, not a generic reversal of this year’s difference	Tax blocks, dates put to use, additions/disposals and regime restrictions
Capital expense debited to revenue: section 37(1)	21(a), capital expenditure category	OI 7a → 7k → BP A15	Capital item expensed in starting profit	Inadmissible revenue charge once	Separate capitalisation and eligible section 32/other statutory allowance; not a blanket later revenue deduction	Invoice, asset nature, ownership/use and tax-block treatment
Pre-use borrowing interest: proviso to section 36(1)(iii)	21(i)	OI 6d → 6s → BP A14	Affected pre-use interest debited as revenue	Only the inadmissible component under the proviso	Consider capital cost and depreciation under the applicable rules, not a second generic expense claim	Borrowing deployment, asset acquisition and first-use dates
Cash expenditure / gratuity provision: section 40A(3)/(7)	21(d)(A) / 21(e)	OI 9b/9c → 9f → BP A17	Affected expense or provision included in profit	Only amount legally inadmissible; test rule 6DD for cash payments	A payment or change in provision does not automatically reverse a permanent disallowance; retest the specific rule	Payee/day payment aggregation, mode/exceptions; approved fund/actual gratuity evidence
Exempt-income expenditure: section 14A	21(h)	OI 16 → BP A8b	Expense reducing starting profit and related to exempt income	Computed inadmissible amount through the dedicated field	No automatic payment-year allowance	Exempt income, attribution and applicable computation; avoid also adding the same amount at A23/A24
ICDS / stock valuation: sections 145(2), 145A	13(e) / 14(b)	OI 3a + 4d → BP A25; OI 3b + 4e → BP A33	Accounting result differs from the required tax treatment	Increase/decrease shown in the correct direction	Track temporary differences and later reversals item by item	ICDS adjustment schedule and stock valuation bridge

Read aggregate fields as links, not additional additions

OI 6s feeds BP A14 for section 36; OI 7k feeds A15 for section 37; OI 8Aj feeds A16 for section 40; OI 9f feeds A17 for section 40A; and OI 11i feeds A18 for section 43B. BP A19 separately takes MSMED interest from OI 17. These OI-to-BP transfers are one effect, not a reason to post the same amount a second time at A23 or A24. Prior-year section 40 allowance travels through OI 8B to A30; prior-year section 43B allowance through OI 10i to A31. A25 and A33 separately carry the increase and decrease from ICDS/valuation fields. AY 2026–27 ITR-6: Part A-OI and Schedule BP.

Withholding disallowance is an expense calculation, not a TDS-shortfall total

Section 40(a)(ia) ordinarily applies 30% to the affected resident payment, while section 40(a)(i) has its own chargeability and nonresident-payment test. First establish that tax was deductible and that the failure remains after the statutory payment cut-off and any legally established payee-compliance relief. Annexure 1 maps 21(b)(ii) to OI 8A(b), including a proportional formula for the reported deduction/deposit shortfall. Review the actual audit data and provision; do not multiply a rupee TDS shortfall by 30% and call that the expense disallowance. Clause 34 provides relevant withholding disclosures, but the linked inadmissible expense route is through clause 21(b). Income-tax Act, 1961: sections 32, 36, 37, 40, 40A, 43B and 145A.

Keep employees, employers and MSME principal on separate clocks

Employees’ contributions under section 36(1)(va) are tested against the applicable fund-law due date. They do not inherit the section 43B employer-contribution proviso. Ordinary section 43B liabilities must be otherwise deductible; the proviso can protect qualifying current liabilities actually paid by the applicable section 139(1) due date. For the serial-2 class, Circular 07/2026 extends that return date from 31 October to 21 November 2026; confirm the company’s class. Section 43B(h) expressly falls outside that return-date proviso. Analyse the micro/small supplier, statutory section 15 timeline, actual payment and deductible component; medium enterprises do not enter clause (h) merely because described generally as MSMEs. Section 43B and its proviso.

Distinguish supplier principal from statutory delayed-payment interest

The current Form 3CD clause 22(iii)(b) records the inadmissible micro/small supplier amount; Annexure 1 links it to OI 11h. Clause 22(i) separately captures MSMED Act section 23 interest, linked to OI 17 and BP A19. The principal may be a payment-timing disallowance; the statutory interest is not made deductible merely by payment. Do not add a gross unpaid purchase twice under both headings, and do not treat later payment before the return date as automatically curing a clause (h) failure. Current purchase, opening liability, stock/capital treatment and interest require separate working columns. Current official Form 3CD, including revised clause 22.

Use audit disclosure without inventing a disallowance

Clause 23 reports payments to specified persons; it does not say the entire payment is excessive under section 40A(2). Similarly, a club-payment or other clause 21(a) disclosure is not by itself a legal conclusion that all of it is disallowed. Test the provision and record any supported difference between gross disclosure and the adjustment. Section 40(b)/40(ba) partner/member restrictions must not be imposed on a company paying its directors simply because a software template contains those rows. Where a genuine company adjustment has no dedicated listed audit clause, document that fact rather than manufacturing an exact clause number.

Maintain a deduction-release register and retest the chosen regime

For each timing item retain original AY, expense/invoice identifier, original tax section, amount disallowed, payment/cure date, current allowance field and unrelieved closing amount. Avoid claiming the same release through both a book reversal and A30/A31. Separately test section 115BA/115BAA/115BAB restrictions before accepting tax depreciation or an incentive-related loss. Normal tax adjustment and MAT adjustment are independent statutory bridges: a Schedule BP disallowance is not automatically an addition to section 115JB book profit. Validate and preview the current utility output, then retain the final computation and filed JSON together. Income-tax Act, 1961: sections 32, 36, 37, 40, 40A, 43B and 145A.

Applicable primary references

AY 2026–27 ITR-6: Part A-OI and Schedule BP Validation Annexure 1: Form 3CD-to-ITR mappings Current official Form 3CD, including revised clause 22 Income-tax Act, 1961: sections 32, 36, 37, 40, 40A, 43B and 145A Section 43B and its proviso Circular 07/2026: applicable return-date extension

Six worked illustrations

All facts and amounts below are fictional. Assumptions describe the model, not additional statutory rules. Tax figures show the computation stage; the final net payable or refund is rounded under section 288B to the nearest ₹10 after all applicable adjustments.

Illustrative example 1: Resident withholding default

Assume a ₹20,00,000 revenue payment to a resident is deductible, subject to TDS, remains in default beyond the relevant statutory cut-off and has no established payee-compliance relief. Section 40(a)(ia) add-back is 30% × ₹20,00,000 = ₹6,00,000, mapped from 3CD 21(b)(ii) to OI 8A(b), total 8Aj and BP A16. If all conditions for later allowance are met, track the same ₹6,00,000 through OI 8B/BP A30, not a ₹20,00,000 new deduction.

Illustrative example 2: Nonresident chargeable payment

Assume ₹12,00,000 of otherwise deductible fees to a nonresident is chargeable in India and subject to an unresolved section 40(a)(i) failure, with no applicable statutory relief. Add-back is ₹12,00,000 through OI 8A(a)/BP A16. Copying the resident 30% approach would add only ₹3,60,000 and understate this assumed disallowance by ₹8,40,000.

Illustrative example 3: Separate contribution clocks

Employee contributions ₹1,00,000 were paid after the applicable fund-law deadline. Employer contributions ₹1,50,000 were paid within the qualifying section 139(1) period. Assume the relevant income/expense treatment is already in the starting computation and no other bar applies. Add ₹1,00,000 through OI 6k/BP A14; no section 43B add-back is required for the ₹1,50,000 employer component. Adding both would overstate the adjustment by ₹1,50,000.

Illustrative example 4: Current 43B addition and prior allowance

Current otherwise deductible tax liability is ₹8,00,000: ₹5,00,000 paid by the applicable return due date and ₹3,00,000 outside it. Add ₹3,00,000 in OI 11a/BP A18. A separate prior-year disallowed tax ₹2,00,000 was actually paid during FY 2025–26 and is not newly deducted in books: allow it through OI 10a/BP A31. Net increase from these two separate items is ₹1,00,000; do not net the OI disclosure fields themselves.

Illustrative example 5: MSME principal and interest

Assume an otherwise deductible ₹10,00,000 micro-enterprise purchase is unpaid beyond the section 15 limit and remains unpaid at 31 March 2026, then is paid in April 2026 after that limit. The FY 2025–26 clause (h) disallowance is ₹10,00,000; payment before the return deadline does not invoke the excluded proviso. Separately charged section 23 MSMED interest ₹20,000 is added at BP A19. Total current adjustment is ₹10,20,000, with distinct later-treatment rules.

Illustrative example 6: Depreciation bridge

Book depreciation included in Schedule BP starting profit is ₹6,00,000. Verified allowable tax depreciation is ₹9,00,000. BP A11 adds ₹6,00,000 and A12iii deducts ₹9,00,000, giving a net ₹3,00,000 reduction. Adding book depreciation again through OI “other disallowance” would duplicate the ₹6,00,000 charge rather than improve reconciliation.

Ten-step verification table

Step	Action	Evidence
1	Freeze book profit and regime	Signed accounts, A1 and election evidence.
2	List every adjustment once	Invoice/ledger identifiers and original AY.
3	Apply the legal provision	Chargeability, timing, exclusions and deduction eligibility.
4	Identify the correct audit field	Actual filed 3CD clause and reported amount.
5	Reconcile gross versus inadmissible amounts	Calculation where the audit disclosure is not the addition.
6	Populate specific OI subrows	Section 36/37/40/40A/43B and MSMED interest separately.
7	Trace OI to BP once	Aggregate links and no duplicate A23/A24 entry.
8	Release eligible prior disallowances	OI 8B/10i to A30/A31 with cure proof.
9	Reconcile depreciation and ICDS separately	DEP blocks, A11/A12, A25/A33 and reversal register.
10	Validate the final filed data	Audit acknowledgement, computation, preview and saved JSON crosswalk.

Sixteen practitioner FAQs

1. Does Annexure 1 replace the Income-tax Act?

No. It supplies the return-to-audit mapping; substantive eligibility still comes from the applicable law.

2. Which BP row receives section 40(a)(ia)?

BP A16, through OI 8A(b) and its section 40 total 8Aj.

3. Is the 30% resident disallowance applied to the TDS amount?

No. The expense base and legally affected portion must be determined; a TDS amount is a different number.

4. Can all nonresident payments be added back automatically?

No. Establish chargeability, deduction obligation, failure and applicable statutory/treaty relief.

5. Where does a later section 40 allowance go?

OI 8B feeds BP A30, supported by the original disallowance and satisfaction of the allowance conditions.

6. Where does a later 43B payment allowance go?

The appropriate OI 10 subrow contributes to 10i and BP A31; identify the prior-year disallowance.

7. Do employees’ contributions use OI 11b?

The dedicated employees’ contribution disallowance is OI 6k/BP A14; employer contributions have the separate 43B route.

8. What is the current MSME principal route?

The verified clause 22(iii)(b) inadmissible amount maps to OI 11h and BP A18 through 11i.

9. What is the MSMED interest route?

Clause 22(i) to OI 17 and BP A19, separate from the supplier-principal computation.

10. Does the section 43B return-date proviso cover clause (h)?

No. The provision expressly excludes clause (h) from that proviso.

11. Are all outstanding trade creditors a section 43B(h) addition?

No. Test supplier population, section 15 timing, actual payment and the deductible component rather than using a gross ledger total.

12. Must gross related-party payments in clause 23 be disallowed?

No. Disclosure and an excessive/unreasonable amount under section 40A(2) are different questions.

13. Can a company use the partner-remuneration cap against directors?

No. A company’s director payment is not automatically a section 40(b) firm-partner payment.

14. Should book depreciation also enter a generic disallowance row?

Not when the same charge has already been added through BP A11; use the dedicated tax-depreciation deduction at A12.

15. Does a normal-tax add-back automatically increase MAT book profit?

No. Section 115JB requires an independent adjustment analysis.

16. What if software imports all audit disclosures as additions?

Review and correct the generated return against the legal working and specific fields before submission; import success is not substantive validation.

Conclusion

Map common company tax adjustments from Form 3CD through Part A-OI to Schedule BP, separating current add-backs, later allowances and disclosure-only amounts.