Section 43B(h) MSME 45-Day Payment Rule: Rules, Exceptions and Tax Impact

TL;DR

Section 43B(h) of the Income-tax Act disallows business deductions for payments to micro and small enterprises delayed beyond 15 or 45 days. This guide explains statutory calculation limits, the wholesale trader exemption, March 31 cut-offs, and practical compliance steps for Gujarat manufacturers and traders to avoid costly tax disallowances.

Quick Answer

Under Section 43B(h) of the Income-tax Act, 1961, any payment due to a registered Micro or Small enterprise for goods or services must be cleared within 15 days (if there is no written contract) or within the agreed period up to a statutory ceiling of 45 days (if a written agreement exists). If payment is delayed past this statutory deadline, the entire purchase expense is disallowed as a tax deduction in that financial year and added back to taxable business profits. Deduction is permitted only in the subsequent financial year when the payment is actually remitted. Crucially, the normal Section 43B grace period allowing payment up to the income tax return filing due date under Section 139(1) does not apply to Section 43B(h).

What Is Section 43B(h) and Why Was It Introduced?

Section 43B of the Income-tax Act governs specific statutory deductions that are allowed only on actual payment basis rather than mere accrual. The Finance Act, 2023 inserted clause (h) into Section 43B with effect from Assessment Year 2024-25, continuing through Financial Year 2025-26 and Financial Year 2026-27.

The legislative goal is straightforward: to protect Micro and Small enterprises from chronic working capital starvation caused by delayed payments from larger buyers.

The statutory text of Section 43B(h) covers:

“any sum payable by the assessee to a micro or small enterprise beyond the time limit specified in section 15 of the Micro, Small and Medium Enterprises Development Act, 2006 (27 of 2006)”

When a buyer delays payment beyond the deadline stipulated under Section 15 of the MSMED Act, 2006, the expense is disallowed in the year of invoice and added back to net taxable profits.

Key Definitions Under the Law

Micro Enterprise

An enterprise where investment in plant, machinery, or equipment does not exceed ₹1 crore and annual turnover does not exceed ₹5 crore.

Small Enterprise

An enterprise where investment in plant, machinery, or equipment does not exceed ₹10 crore and annual turnover does not exceed ₹50 crore.

Appointed Day

The day following immediately after the expiry of 15 days from the day of acceptance or deemed acceptance of goods or services by the buyer.

Day of Acceptance

The day of actual delivery of goods or rendering of services, or the day when formal objections raised by the buyer within 15 days are resolved.

Why Section 43B(h) Matters for Gujarat Businesses

Gujarat is the industrial manufacturing and trade engine of western India. Industrial ecosystems across the state operate on dense vendor networks:

• Surat: Man-made fibre weaving units, yarn processors, dyeing houses, and diamond polishing workshops.
• Rajkot and Jamnagar: Precision engineering, diesel engine parts, brass components, and casting foundries.
• Morbi and Himmatnagar: Ceramic wall and floor tile manufacturers, refractory units, and sanitaryware makers.
• Vadodara, Bharuch, and Ankleshwar: Specialty chemical synthesizers, bulk drug intermediate units, and packaging suppliers.
• Ahmedabad and Sanand: Pharmaceutical formulations, textile processing, auto ancillary fabricators, and machinery builders.
• Bhavnagar: Ship recycling operations, brass parts production, and agro-commodity processing mills.

In these trade corridors, customary credit cycles historically ran between 60, 90, and 120 days. Section 43B(h) fundamentally disrupts informal credit practices. A business in Surat purchasing grey fabric or a foundry in Rajkot buying pig iron from a Micro enterprise cannot rely on informal 90-day credit without facing tax disallowance on March 31.

The 15-Day vs 45-Day Payment Rule (Section 15, MSMED Act)

The time limits under Section 43B(h) are governed by Section 15 of the MSMED Act, 2006. The law sets two distinct statutory benchmarks:

Scenario	Statutory Condition	Maximum Payment Window	Legal Reference
No Written Agreement	Oral order, standard invoice without credit clause, or no formal contract	15 Days from physical receipt of goods or services	Section 15, MSMED Act (Appointed Day)
Written Agreement Exists	Purchase Order (PO), service contract, or signed vendor terms	Agreed days, capped at 45 Days maximum	Section 15, MSMED Act Proviso
Agreement Stating > 45 Days	Contract specifying 60, 90, or 120 days credit	45 Days (any clause exceeding 45 days is void by law)	Section 15, MSMED Act

Understanding Acceptance and Objection Windows

The calculation of 15 or 45 days begins on the date of actual delivery of goods or rendering of services:

1. Undisputed Delivery: If goods are delivered on 1st November and no objection is raised within 15 days, 1st November is the day of acceptance.
2. Defective Goods or Disputes: If the buyer raises a formal objection in writing regarding quality or specifications within 15 days of delivery, the counting starts only from the date the supplier removes the objection or rectifies the defect.
3. Deemed Acceptance: If no written objection is communicated within 15 days of physical delivery, the goods are deemed accepted on the date of delivery.

Who Is Covered — and Who Is Exempt?

A frequent misconception among business owners is that Section 43B(h) applies equally to every vendor holding an Udyam certificate. That is legally incorrect. The statute applies strictly based on enterprise classification and operational activity.

Enterprise Category	Turnover & Investment Criteria	Covered Under Section 43B(h)?	Legal Reason
Micro Manufacturer	Plant ≤ ₹1 Cr, Turnover ≤ ₹5 Cr	Yes	Fully covered under Chapter V, MSMED Act
Micro Service Provider	Equipment ≤ ₹1 Cr, Turnover ≤ ₹5 Cr	Yes	Fully covered under Chapter V, MSMED Act
Small Manufacturer	Plant ≤ ₹10 Cr, Turnover ≤ ₹50 Cr	Yes	Fully covered under Chapter V, MSMED Act
Small Service Provider	Equipment ≤ ₹10 Cr, Turnover ≤ ₹50 Cr	Yes	Fully covered under Chapter V, MSMED Act
Medium Enterprise	Plant ≤ ₹50 Cr, Turnover ≤ ₹250 Cr	No (Exempt)	Section 43B(h) explicitly excludes Medium units
Wholesale / Retail Trader	Registered under NIC codes 45, 46, 47	No (Exempt)	Udyam benefits limited to PSL; Section 15 excluded
Unregistered Suppliers	Entities with no active Udyam registration	No (Exempt)	MSMED Act provisions apply only to registered units

The Critical Trader Exemption Explained

Many Gujarat wholesalers in Ahmedabad’s Maskati Cloth Market or Surat’s textile trading rings hold Udyam registrations. Buyers often wonder: Does Section 43B(h) apply when purchasing goods from these traders?

The answer is No.

The Ministry of Micro, Small and Medium Enterprises issued Office Memorandum No. 5/2(2)/2021-E/P & G/Policy on July 2, 2021, which allowed retail and wholesale traders to register on the Udyam portal solely for Priority Sector Lending (PSL) benefits. The Office Memorandum explicitly affirmed that benefits under Chapter V of the MSMED Act (comprising Sections 15 to 25) do not extend to traders.

Because Section 15 does not apply to wholesale and retail traders, delayed payments to traders (NIC Codes 45, 46, and 47) do not attract Section 43B(h) disallowance.

Does Section 43B(h) Apply to Presumptive Taxation (Section 44AD / 44ADA)?

If a business or professional files their income tax return under the presumptive taxation schemes of Section 44AD or Section 44ADA:

• Section 43B(h) does not apply.
• Both Section 44AD and Section 44ADA commence with non-obstante clauses: “Notwithstanding anything to the contrary contained in sections 28 to 43C…”
• Under presumptive taxation, profits are deemed at 6% or 8% (for business) or 50% (for professionals) without claiming itemized business expenditures under Sections 30 to 38. Because individual deductions are not claimed, statutory disallowance under Section 43B(h) cannot be enforced.

However, if books of accounts are audited under Section 44AB, or if the taxpayer declares actual profits lower than presumptive limits, Section 43B(h) applies in full force.

Why the Section 139(1) ITR Filing Proviso Does Not Help

Under standard Section 43B provisions, taxpayers have historically enjoyed a relaxation. For liabilities like employer PF contributions, ESIC, bonus, commission, or GST payable, an expense remains deductible if paid on or before the due date of filing the income tax return under Section 139(1) (e.g., 31st July or 31st October).

Section 43B(h) has no such relaxation.

The Finance Act, 2023 amended the first proviso of Section 43B to specifically exclude clause (h). If a payment to a Micro or Small supplier is due on 25th March and paid on 10th May (before the ITR filing date but after 45 days), the deduction is disallowed for the financial year of invoice. It can be claimed only in the subsequent financial year when payment was made.

March 31 Year-End Cut-Off: How Invoices Fall Across Financial Years

The application of Section 43B(h) centers on year-end balances outstanding as of March 31. Purchases made and settled within the same financial year generally resolve without disallowance (though statutory MSME interest may still apply).

The table below outlines how year-end invoices are treated for tax deduction:

Invoice Date	Written Agreement Terms	Statutory Due Date	Actual Payment Date	Tax Deduction Assessment
10 Feb 2026	Written agreement (45 days)	27 Mar 2026	25 Mar 2026	Allowed in FY 2025-26 (Paid within 45 days).
10 Feb 2026	Written agreement (45 days)	27 Mar 2026	05 Apr 2026	Disallowed in FY 2025-26; Allowed in FY 2026-27 (Paid after due date).
15 Mar 2026	No written agreement (15 days)	30 Mar 2026	02 Apr 2026	Disallowed in FY 2025-26; Allowed in FY 2026-27 (Delayed past 15 days).
15 Mar 2026	Written agreement (45 days)	29 Apr 2026	20 Apr 2026	Allowed in FY 2025-26 (Paid within 45 days in subsequent FY).
28 Mar 2026	Written agreement (45 days)	12 May 2026	05 May 2026	Allowed in FY 2025-26 (Paid within 45 days in subsequent FY).
28 Mar 2026	Written agreement (45 days)	12 May 2026	20 May 2026	Disallowed in FY 2025-26; Allowed in FY 2026-27 (Paid beyond 45 days).

[!IMPORTANT] Notice the critical distinction between invoices dated in mid-to-late March: If you have a written agreement for 45 days, a raw material invoice dated 20th March has its statutory due date on 4th May. If paid on 25th April, it is fully deductible in FY 2025-26! If you lack a written agreement, the 15-day rule forces the due date to 4th April. Missing that 4th April date pushes the deduction into the following financial year.

Worked Example: Tax Impact of Delayed Payment

Consider Shree Ram Engineering Pvt Ltd, an auto-component machining firm operating in Rajkot, Gujarat. The company files its return of income as a domestic corporate entity with an applicable tax rate of 25% plus 4% Health and Education Cess (effective corporate tax rate = 26%).

Financial Position for FY 2025-26

• Gross Annual Turnover: ₹12,00,00,000 (₹12 Crore)
• Net Profit before Tax (PBT) as per Profit & Loss: ₹65,00,000

Sundry Creditors Outstanding as of 31st March 2026

The company has ₹45,00,000 outstanding to various vendors as of 31st March 2026. A detailed audit of the creditors ledger reveals:

1. Vendor A (Micro Forging Unit, Rajkot): Invoice dated 10th January 2026 for ₹10,00,000. 45 days expired on 24th February 2026. Paid on 15th April 2026.
2. Vendor B (Small Tooling Workshop, Ahmedabad): Invoice dated 22nd March 2026 for ₹8,00,000 with a written 45-day contract. Statutory due date is 6th May 2026. Paid on 28th April 2026.
3. Vendor C (Medium Steel Bar Rolling Mill, Bhavnagar): Invoice dated 15th December 2025 for ₹12,00,000. Paid on 20th May 2026.
4. Vendor D (Wholesale Industrial Hardware Trader, Surat): Invoice dated 5th January 2026 for ₹7,00,000. Udyam registered under NIC 4659. Paid on 10th May 2026.
5. Vendor E (Micro Precision Cutting Unit, Jamnagar): Invoice dated 15th February 2026 for ₹8,00,000. No written agreement (15-day limit expired on 2nd March 2026). Paid on 20th April 2026.

Computation of Taxable Income Adjustment

Vendor	Category	Invoice Amount	Status on Due Date	Section 43B(h) Treatment
Vendor A	Micro Manufacturer	₹10,00,000	Overdue on 31 Mar	Disallowed in FY 2025-26 (Added to profit)
Vendor B	Small Manufacturer	₹8,00,000	Due date in May; paid within 45 days	Allowed in FY 2025-26
Vendor C	Medium Enterprise	₹12,00,000	Overdue on 31 Mar	Allowed (Medium units exempt from 43B(h))
Vendor D	Wholesale Trader	₹7,00,000	Overdue on 31 Mar	Allowed (Traders exempt per MSME circular)
Vendor E	Micro Manufacturer	₹8,00,000	Overdue on 31 Mar (no contract)	Disallowed in FY 2025-26 (Added to profit)
Total Disallowance	—	—	—	₹18,00,000

Tax Calculation Impact

Net Profit as per Books:                    ₹65,00,000
Add: Disallowance under Section 43B(h)       ₹18,00,000
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Revised Taxable Business Income:            ₹83,00,000

Normal Corporate Tax (26% on ₹65 Lakh):     ₹16,90,000
Revised Corporate Tax (26% on ₹83 Lakh):    ₹21,58,000
--------------------------------------------------------
Immediate Extra Cash Tax Liability:          ₹4,68,000

Because Vendor A and Vendor E were paid in April 2026, the company will get a deduction of ₹18,00,000 in FY 2026-27 (Assessment Year 2027-28). However, for FY 2025-26, the company loses ₹4,68,000 in immediate cash flow, accompanied by mandatory advance tax interest liabilities under Section 234B and 234C.

Compound Penal Interest Under Section 16 of the MSMED Act

In addition to income tax disallowance, delaying payments to Micro and Small suppliers triggers severe commercial penalties under Section 16 of the MSMED Act:

• Mandatory Penal Interest: The buyer must pay compound interest with monthly rests at three times the Bank Rate notified by the Reserve Bank of India.
• Section 23 Disallowance: Section 23 of the MSMED Act explicitly provides that interest paid under Section 16 is not deductible as an expense under the Income-tax Act. It is a permanent tax disallowance, not a timing difference.

Step-by-Step Compliance Playbook for Gujarat Businesses

To protect your business from unexpected tax additions and working capital drains, implement this 5-step operational protocol:

1. Collect and Verify Udyam Certificates

Do not rely on verbal declarations. Require every active vendor to provide their Udyam Registration Certificate. Check:

• Whether the enterprise is classified as Micro, Small, or Medium.
• The registered activities and primary National Industrial Classification (NIC) codes.
• Whether the certificate confirms Manufacturing or Services rather than mere Trading.
• Verify certificate authenticity directly on the official government portal at udyamregistration.gov.in.

2. Standardize Purchase Orders with a 45-Day Payment Term

Because the statutory default without a written agreement is a restrictive 15 days, ensure that every Purchase Order, delivery challan, work contract, or commercial invoice incorporates an explicit payment terms clause:

“Payment shall be made within 45 days from the date of acceptance of goods or services, subject to Section 15 of the MSMED Act, 2006.”

Both parties should sign or acknowledge the document to establish a binding written agreement.

3. Tag Vendors in Your Accounting Software

Whether your finance team uses Tally Prime, Zoho Books, SAP, or Busy:

• Create separate creditor groups: Sundry Creditors - Micro, Sundry Creditors - Small, Sundry Creditors - Medium, and Sundry Creditors - Traders.
• Configure bill-by-bill credit limits to 45 days for Micro and Small manufacturers.
• Generate weekly aging reports flagging invoices reaching 30 days to clear payments before the 45-day deadline.

4. Implement a March Year-End Cut-Off Protocol

Begin year-end vendor reconciliations on 1st March each year:

• Identify all pending bills from Micro and Small suppliers.
• Ensure that all bills received prior to 15th February are cleared before 31st March.
• For invoices received between 15th March and 31st March, calculate the exact 45-day deadline falling in April or May and lock payment dates into your banking schedule.

5. Document Objections and Rejections Promptly

If raw materials or components delivered are sub-standard:

• Issue a written rejection memo, email, or formal debit note to the vendor within 15 days of delivery.
• Under Section 15 of the MSMED Act, lodging an objection stops the 15-day/45-day clock until the supplier replaces the defective material or resolves the dispute.

Common Mistakes That Trigger Scrutiny and Disallowance

Under Tax Audit reporting guidelines (Form 3CD, Clause 22), statutory tax auditors must examine compliance with Section 43B(h). Watch out for these common errors:

1. Assuming Payment Before ITR Filing Is Acceptable
   Believing that clearing dues before 31st July or 31st October avoids disallowance. Clause (h) does not allow the Section 139(1) window.

2. Relying on Unsigned Credit Terms
   Printing “Credit Terms: 60 Days” on an invoice without a signed purchase contract or written mutual agreement. The department caps agreements at 45 days and rejects unilateral terms.

3. Disallowing Payments to Traders by Mistake
   Treating registered wholesale or retail traders as covered under 43B(h). Wholesale and retail traders (NIC 45, 46, 47) are exempt from Section 15.

4. Disallowing Payments to Medium Enterprises
   Failing to distinguish between Small and Medium enterprises. Medium units are excluded from Section 43B(h).

5. Ignoring Out-of-State Micro Suppliers
   Assuming Section 43B(h) applies only to suppliers within Gujarat. The rule applies to every eligible Micro and Small enterprise across India.

6. Treating Capital Asset Purchases Under 43B(h)
   Section 43B(h) disallows revenue expenditures claimed against profit. Capital asset purchases (capitalized in plant and machinery) do not affect Profit & Loss directly, though depreciation claims on unpaid portions can be contested if asset ownership is contingent.

7. Claiming Deduction for MSME Penal Interest
   Attempting to claim Section 16 penal interest as a business deduction. Section 23 of the MSMED Act strictly forbids this deduction.

FAQ

Does Section 43B(h) apply to purchases from wholesale or retail traders?

No. As clarified by the Ministry of MSME via Office Memorandum No. 5/2(2)/2021-E/P & G/Policy dated July 2, 2021, wholesale and retail traders registered under Udyam are eligible only for Priority Sector Lending benefits. The provisions of Chapter V of the MSMED Act, 2006, including Section 15 payment limits, do not extend to them. Therefore, payments to traders are not subject to Section 43B(h) disallowance.

Can a business claim deduction if payment is made before the ITR filing due date?

No. Unlike other statutory dues covered under Section 43B (such as employer PF, ESIC, bonus, or GST), the second proviso to Section 43B—which allows deductions if paid on or before the due date under Section 139(1)—does not apply to clause (h). The deduction is allowed strictly in the year of actual payment if delayed beyond 15 or 45 days.

What is the maximum credit period allowed by law under Section 43B(h)?

The maximum credit period allowed by law is 45 days from the date of acceptance of goods or services, and this requires a written contract or agreement. If there is no written contract, the statutory limit is 15 days. Even if a contract specifies 60 or 90 days, the law caps the valid credit period at 45 days.

Does Section 43B(h) apply to Medium enterprises?

No. Section 43B(h) applies strictly to Micro and Small enterprises. Medium enterprises (investment in plant up to ₹50 crore and turnover up to ₹250 crore) are excluded from the scope of Section 43B(h). Delayed payments to Medium enterprises are governed by normal mercantile accounting rules.

Does Section 43B(h) apply to businesses filing under Section 44AD presumptive taxation?

No. Taxpayers declaring income under the presumptive taxation provisions of Section 44AD or Section 44ADA are exempt from Section 43B(h). Both presumptive sections contain non-obstante clauses that override Sections 28 to 43C, meaning individual expenditure deductions are neither claimed nor disallowed.

What happens if an invoice is dated 25th March and paid on 20th April?

If you have a written agreement specifying a 45-day credit term, the statutory due date for a 25th March invoice is 9th May. Because payment on 20th April falls well within the 45-day window, the entire expense is fully allowed as a deduction in FY 2025-26, even though payment crossed into the new financial year.

Is penal interest paid under Section 16 of the MSMED Act tax deductible?

No. Under Section 23 of the MSMED Act, 2006, interest paid or payable by a buyer to a supplier for delayed payments under Section 16 is explicitly prohibited from being claimed as a deductible business expense under the Income-tax Act.

How can a buyer verify whether a supplier is a Micro or Small enterprise?

A buyer should request a copy of the supplier’s Udyam Registration Certificate and verify its authenticity on the official government portal (udyamregistration.gov.in). The certificate details whether the vendor is classified as Micro, Small, or Medium, and specifies whether their registered business activity is manufacturing, services, or trading.

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Sources & Statutory References

• Section 43B(h), Income-tax Act, 1961 — Statutory Disallowances
• Section 15 & 16, Micro, Small and Medium Enterprises Development Act, 2006
• Notification S.O. 2119(E) dated 26.06.2020 — Classification of MSMEs
• Ministry of MSME Office Memorandum No. 5/2(2)/2021-E/P & G/Policy dated 02.07.2021 (Trader Registration & Chapter V Applicability)
• Central Board of Direct Taxes (CBDT) Guidelines on Section 43B(h)

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Professional Support for Gujarat Businesses

Managing vendor classifications, tracking 15-day and 45-day aging cycles, and preparing Form 3CD tax audit schedules can be challenging during year-end closing. If your firm requires assistance with vendor ledger reconciliation, Udyam status audits, or business tax filing services, our team at FinTax24 can help review your outstanding payables to keep your filings accurate and audit-ready. You can also explore our income tax return filing service or streamline ongoing accounting with our monthly bookkeeping solutions.

Disclaimer: This article is for general informational purposes and reflects the rules understood at the time of publication. Tax and compliance requirements can vary based on individual circumstances and subsequent government notifications. Consider professional advice before acting on a significant tax or legal matter.