Section 43B(h) Income Tax — 45 Day Payment Rule for MSMEs Explained
If your business supplies goods or services to larger companies, you've probably experienced the frustration of waiting 60, 90, or even 120 days to get paid. Your work is done, and your invoice is raised, but the cash doesn't come—and your working capital suffers for it. The government introduced Section 43B(h) specifically to fix this problem, and since April 1, 2024, it's been one of the most meaningful protections for MSME suppliers in India's tax code.
Understanding this rule matters whether you're an MSME selling to large buyers or a business that purchases from MSME vendors. The financial consequences of getting it wrong are real and significant—and for MSME owners, understanding your rights under this provision can directly strengthen your cash flow and your ability to qualify for business loans.
At Sharda Associates, we work with MSME owners on everything from loan applications to financial documentation. If you're a registered MSME trying to understand how this rule affects your business, or a buyer trying to stay compliant,
What Is Section 43B(h)
Section 43B(h) is a clause inserted into the Income Tax Act through the Finance Act 2023, effective from April 1, 2024. In straightforward terms, it links a buyer's tax deduction to whether they pay their MSME vendors on time.
Before this rule, a business could record an expense in its books when goods were received — and claim a tax deduction on that expense — even if the payment to the MSME supplier was still pending months later. This practice was common and created a structural incentive for large companies to delay payments to small suppliers indefinitely, since there was no immediate tax consequence for doing so.
Section 43B(h) closes this gap entirely. Now, if a business purchases goods or services from a registered micro or small enterprise and doesn't pay within the prescribed timeline, that expense cannot be deducted from taxable income in the year it was recorded. The deduction is available only in the financial year when the payment is actually made.
The 15-Day and 45-Day Rule — What Applies When
This is where most people get confused, so it's worth being precise.
The timeline depends entirely on whether a written agreement exists between the buyer and the MSME supplier:
No written agreement: Payment must be made within 15 days of the date the goods or services were accepted by the buyer.
A written agreement exists: Payment must be made by the agreed date, but that agreed period cannot exceed 45 days under any circumstances. Even if both parties sign an agreement specifying 60 days or 90 days, the law treats 45 days as the absolute maximum. The excess portion of the agreed period is void under tax law.
This second point trips up buyers regularly. A company that signs a 60-day payment agreement with an MSME supplier—and pays on day 55—is technically in violation because the law caps the credit period at 45 days regardless of what the contract says.
One more important clarification: Section 43B(h) applies only to Micro and Small Enterprises registered under the MSMED Act (Udyam Registration). It does not apply to medium enterprises—even if they have Udyam Registration, the 45-day rule doesn't cover them.
What Happens If You Miss the Deadline
The consequences for a buyer who misses the payment deadline are two separate and additive problems:
Tax deduction disallowance: The unpaid amount is added back to the buyer's taxable income for that financial year, as if the expense had never been incurred. So if a buyer owes ₹50 lakh to an MSME supplier and hasn't paid by March 31, that ₹50 lakh becomes taxable income — potentially generating a tax liability of ₹15-17 lakh at standard corporate tax rates, even though the money hasn't been received by anyone.
Compound interest on the outstanding amount: Under Section 16 of the MSMED Act, late payments attract compound interest at three times the RBI bank rate. At current RBI rates, this translates to approximately 19-21% per annum, compounded. Importantly, this interest is not tax-deductible — meaning the financial hit is worse than the interest rate alone suggests.
The combined effect — taxable income addition plus non-deductible interest running simultaneously — makes delaying payments to MSME vendors far more expensive than most buyers realize when they're managing their payables cycle.
A Real Example That Makes This Concrete
Consider a fabric trading company that purchases ₹80 lakh worth of fabric from three MSME-registered weaving units in January 2026, with written agreements specifying 60-day payment terms.
The buyer assumes the 60-day contractual term protects them. It doesn't. Under Section 43B(h), the maximum permissible credit period is 45 days—the contractual 60 days is void on the excess portion. If the buyer pays on day 55, they've technically missed the 45-day deadline by 10 days.
For the financial year ending March 31, the unpaid amounts (or the amounts paid after day 45) get added back to taxable income. On ₹80 lakh, at 30% tax rate, that's ₹24 lakh in additional tax—on top of compound interest running at approximately 20% on the overdue amounts.
The buyer ends up paying far more in total than if they'd arranged payment within 45 days, even if that meant drawing on their own working capital credit line.
What This Means for MSMEs — The Other Side of the Equation
For MSME suppliers, Section 43B(h) fundamentally changes the bargaining dynamic with large buyers. Before this rule, a large company could effectively impose 90-120 day payment terms on a small supplier, and the small supplier had little practical recourse. Now, the tax consequence falls on the buyer—which gives MSMEs a meaningful lever to negotiate faster payment.
If you're an MSME owner who regularly supplies to large companies or government departments, here are the practical steps that now matter:
Maintain your Udyam Registration actively. Section 43B(h) only applies to payments due to Udyam-registered Micro and Small Enterprises. If your registration lapses or your classification changes, you lose the protection this provision offers.
Keep acceptance documentation. The 15-day or 45-day clock starts from the date of acceptance (or deemed acceptance) of goods or services — not just the invoice date. Keeping clear records of delivery acknowledgments and acceptance dates is important if a dispute arises.
Use this provision when negotiating payment terms. Large buyers are now acutely aware of the tax consequence of delayed MSME payments. A well-informed MSME supplier can cite Section 43B(h) as a basis for insisting on 30-45 day payment cycles, knowing that the buyer's own tax advisor will support faster payment.
How This Connects to Your Business Loan
For MSME owners applying for working capital loans, this provision matters for a reason that isn't immediately obvious.
Banks evaluate your working capital cycle when assessing your loan application — specifically, how long it takes you to collect payments from your customers. If your financial statements show debtor days of 90-120 days, banks see a higher working capital risk and may offer tighter credit terms or lower sanctioned limits.
Section 43B(h) creates a genuine mechanism to compress debtor days — and a CMA report or project report that reflects a shorter, more predictable receivables cycle directly improves your working capital loan eligibility and the terms banks are willing to offer.
At Sharda Associates, when we prepare CMA data and project reports for MSME loan applications, we look at your actual receivables cycle — including whether Section 43B(h) has effectively shortened your collection period — and structure the working capital projection accordingly. This is the kind of detail that makes a project report reflect your business accurately rather than relying on historical numbers that may no longer apply.
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Compliance Checklist for Buyers
If you purchase goods or services from MSME vendors, here's what your finance team should be doing:
Maintain an updated vendor database identifying Udyam-registered Micro and Small suppliers separately from Medium and non-MSME vendors
For each MSME invoice, calculate the exact deadline — 15 days from acceptance date (no agreement) or the agreed date up to 45 days maximum (written agreement)
Flag invoices approaching the 15/45-day mark well in advance — not at the end of the financial year
Automate payment scheduling for MSME vendors where possible to avoid accidental breaches
Reconcile accounts payable against MSME vendor status before March 31 each year
Companies are also required to disclose outstanding amounts due to MSMEs in their financial statements, and tax audit reports (Form 3CD) now specifically capture MSME payment compliance — making this a formal audit point, not just a best-practice recommendation.
Conclusion
Section 43B(h) is one of the most practically useful pieces of MSME legislation India has introduced in recent years. It directly addresses the working capital problem that has constrained small businesses for decades—delayed payments from large buyers—by attaching a clear tax consequence to non-compliance.
For MSME owners, understanding this rule and actively using Udyam Registration to invoke its protections is a straightforward step that can meaningfully improve cash flow. For buyers, it's a compliance requirement that's now embedded in tax audit processes and carries real financial consequences if ignored. Either way, the rule is now fully operational under the Income Tax Act 2025 effective from April 1, 2026—and businesses that haven't yet adjusted their payables processes and loan application documentation to reflect this new reality are leaving money on the table.
📞 Need Help With Your MSME Financial Documentation? Contact Us
Whether you're an MSME owner looking to understand how your receivables cycle affects your loan application or you need a CA certified project report or CMA data prepared for a bank loan, Sharda Associates is here to help — without the complicated back-and-forth that most applicants dread.
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