The MSME 45-Day Payment Rule (Section 43B(h)): What Small Buyers and Suppliers Must Get Right
Section 43B(h) disallows your tax deduction for payments to Micro and Small enterprises unless paid within 15 or 45 days. The 45-day cap is absolute. Here is how the rule works and what to fix before year-end.
- Section 43B(h) defers a buyer’s deduction on payables to Micro/Small enterprises unless paid within 15 days (no agreement) or 45 days (with agreement).
- The 45-day cap is absolute — a contract allowing longer credit does not protect the buyer; the deduction is still deferred.
- Late payment is a double hit: deferred deduction plus mandatory non-deductible interest at three times the RBI bank rate, compounded monthly.
If you buy from a small supplier and pay them late, the tax cost lands on you — not them. Section 43B(h) of the Income-tax Act disallows your deduction for any amount owed to a Micro or Small enterprise unless you pay within the MSMED Act limit: 15 days with no written agreement, or a maximum of 45 days with one (Tally Solutions, 2024). As your FY 2025-26 books close on 31 March 2026, this clause decides which expenses you can actually claim.
- Section 43B(h) defers your deduction on payables to Micro/Small enterprises unless paid within 15 days (no agreement) or 45 days (with agreement).
- The 45-day cap is absolute — a contract allowing 60-day credit does NOT protect you; the deduction still gets deferred.
- It applies only to suppliers with valid Udyam Registration classified as Micro or Small; Medium enterprises are excluded.
- Late payment is a double hit: deferred deduction plus mandatory interest at 3x the RBI bank rate, compounded monthly — and that interest is itself non-deductible.
What exactly does Section 43B(h) do?
Inserted by the Finance Act, 2023 and effective from AY 2024-25, the clause says a buyer can claim a deduction for amounts payable to a Micro or Small enterprise only in the year the payment is actually made, if it crosses the MSMED Act time limit (IndiaFilings, 2024). Pay on time and you deduct in the same year; pay late and the deduction shifts to the year you finally pay, inflating your taxable income now.
The clock runs from the date of acceptance — or deemed acceptance — of goods or services under Section 15 of the MSMED Act, 2006. With no written agreement the limit is 15 days; with a written agreement the limit is whatever you agreed, capped at 45 days.
My contract allows 60-day credit. Am I safe?
No. The 45-day period is an absolute ceiling. A written agreement can shorten it but cannot extend it (Cashfree, 2024). If you pay after 45 days, the deduction is deferred regardless of what the contract says. Many buyers assume a long credit term in the purchase order protects them — it does not.
Who counts as a covered supplier?
Only Micro and Small enterprises with a valid Udyam Registration. Medium enterprises are excluded, and old Udyog Aadhaar or EM-I/II registrations no longer count (Tally Solutions, 2024). Your own registration status is irrelevant — what matters is the supplier's classification (IndiaFilings, 2024). The cleanest control is to collect each supplier's Udyam Registration Number and verify their current category before treating any payable as covered. A vendor's Udyam status is one more reason to keep your own MSME Udyam registration and records current.
The hidden second penalty: non-deductible interest
Late payment triggers two costs. First, 43B(h) defers your deduction on the principal. Second, Section 16 of the MSMED Act mandates interest at three times the RBI bank rate, compounded monthly, from the day after the deadline until you pay — even if the contract is silent (Udyamita Helpline, 2024). Worse, that interest is permanently non-deductible under Section 23 of the MSMED Act (My Digital Filing, 2024).
Frequently Asked Questions
My contract with an MSME supplier allows 60-day credit. Am I safe from 43B(h)?
No. The 45-day period is an absolute ceiling. A written agreement can shorten it but cannot extend it. If you pay after 45 days, the deduction is deferred to the financial year in which you actually pay, regardless of what your contract says — adding to your taxable income for the current year.
Does Section 43B(h) apply to payments to all my suppliers?
Only to suppliers registered as Micro or Small enterprises on the Udyam portal. Medium enterprises are excluded, and old Udyog Aadhaar or EM-I/II registrations no longer count. Collect each supplier's Udyam Registration Number and verify their classification before treating any payable as covered.
What extra cost do I face if I pay an MSME supplier late?
Two costs. Section 43B(h) defers your deduction on the principal until you actually pay. Separately, Section 16 of the MSMED Act mandates interest at three times the RBI bank rate, compounded monthly, from the day after the deadline — and that interest is permanently non-deductible under Section 23.
Does this rule still apply under the new Income-tax Act, 2025?
Yes. The provision carries forward under the new Act, effective 1 April 2026, with equivalent clause numbering (ClearTax Advisors, 2026). For your FY 2025-26 books closing 31 March 2026, clear all Micro and Small enterprise payables within the 15/45-day limits to preserve your deductions.
What should you do next?
Before 31 March 2026, run a payables ageing report, flag every Micro/Small supplier by Udyam status, and clear anything past 45 days. For year-end books and tax, see Bizeract bookkeeping services and business ITR filing. For the wider month's updates, read our June 2026 Indian SMB news roundup.
What should you verify before using this MSME Finance guide?
Before acting on the msme 45-day payment rule), verify the current rules or platform behavior with the GST Portal. The practical answer depends on your business model, state, turnover, documents, software stack, and whether the decision affects tax, customer data, paid media spend, or a production workflow.
Use this article as a working checklist, then confirm thresholds, registration status, return forms, document rules, and portal notices. In our audits, most expensive mistakes do not come from ignoring the whole process. They come from one stale assumption, one mismatched address, one missing event, or one automation path that nobody tested after launch.
| Checkpoint | Why it matters | Where to confirm |
|---|---|---|
| Current rule or platform status | Limits, forms, policies, and APIs can change after a blog update. | GST Portal |
| Your exact business case | A local shop, freelancer, D2C store, agency, and SaaS team rarely need the same next step. | Documents, invoices, campaign data, analytics setup, or workflow logs |
| Implementation evidence | The safest business decision is backed by proof, not memory or screenshots from an old setup. | Portal acknowledgement, dashboard export, invoice sample, test lead, or error log |
How do we apply this in real business work?
We start with the smallest decision that can be verified. For compliance work, that means matching PAN, address, bank, invoices, and portal status before filing. For websites, marketing, analytics, and automation, it means testing the real user path from first click to final record. The boring checks catch the costly failures.
A useful rule: if a claim changes money, tax, reporting, or customer communication, keep evidence for it. Save the acknowledgement, export the report, test the form, and note the date you verified the source. That gives you a clean trail when a client, officer, platform, or internal team asks why the setup was done that way.
When should you get expert review?
Get expert review when the next action can create tax exposure, lost reporting data, ad waste, broken customer communication, or production downtime. A simple self-check is enough for low-risk learning. A filed return, new registration, tracking migration, paid campaign restructure, or live automation deserves a second set of eyes before it affects customers or records.
How often should this be rechecked?
Recheck the decision whenever your turnover, state, product mix, campaign budget, website stack, analytics property, or workflow ownership changes. Also recheck it after major portal updates, platform policy changes, annual filing deadlines, and vendor migrations. The guide is useful today only if the facts behind it still match your business.
What is the fastest safe way to decide?
Write the decision in one sentence, list the proof needed for that sentence, and verify only those items first. This keeps the work focused. If the proof confirms the decision, proceed. If one item is unclear, pause and resolve that point before changing filings, campaigns, tracking, website code, or automation logic.
What can go wrong if you skip verification?
The usual failure is not dramatic at first. It looks like a rejected application, a wrong tax invoice, a missing conversion, a duplicate lead, a broken report, or a workflow that silently stops. Those small failures become expensive when nobody notices them until month-end reporting, filing day, or a customer escalation.
What evidence should you keep after making the change?
Keep enough evidence to reconstruct the decision later. For a compliance topic, that usually means the application reference number, registration certificate, invoice sample, return acknowledgement, payment challan, notice reply, or source link checked on the day of filing. For a website, campaign, analytics setup, or automation, keep the before-and-after screenshot, test submission, dashboard export, webhook log, and the exact setting that changed.
This matters because most business fixes are revisited months later, when nobody remembers the original reason. A short evidence trail makes audits faster, handovers cleaner, and vendor conversations more precise. It also keeps the advice in this guide tied to your real operating context instead of becoming a generic checklist that gets copied without review.
- Date checked: record when the official source, dashboard, or portal screen was reviewed.
- Business context: note the entity, state, product, campaign, property, or workflow affected.
- Proof of action: save the acknowledgement, report export, test result, or live URL.
- Owner: assign one person to re-check the item when rules, tools, or business volume change.
Which next step should you take after reading this?
Turn the article into one action list. Mark what is already true, what needs proof, and what needs expert review. If you want to go deeper, compare this guide with MSME / Udyam Registration, Bookkeeping Services, and Business ITR Filing. Then update the decision only after the official source and your own records agree.
Frequently asked questions
My contract with an MSME supplier allows 60-day credit. Am I safe from Section 43B(h)?
No. The 45-day period is an absolute ceiling. A written agreement can shorten it but cannot extend it. If you pay after 45 days, the deduction is deferred to the financial year in which you actually pay, regardless of what your contract says, adding to your taxable income for the current year.
Does Section 43B(h) apply to payments to all my suppliers?
Only to suppliers registered as Micro or Small enterprises on the Udyam portal. Medium enterprises are excluded, and old Udyog Aadhaar or EM-I/II registrations no longer count. Collect each supplier’s Udyam Registration Number and verify their classification before treating any payable as covered.
What extra cost do I face if I pay an MSME supplier late?
Two costs. Section 43B(h) defers your deduction on the principal until you actually pay. Separately, Section 16 of the MSMED Act mandates interest at three times the RBI bank rate, compounded monthly, from the day after the deadline — and that interest is permanently non-deductible under Section 23.
Does this rule still apply under the new Income-tax Act, 2025?
Yes. The provision carries forward under the new Act, effective 1 April 2026, with equivalent clause numbering. For your FY 2025-26 books closing 31 March 2026, clear all Micro and Small enterprise payables within the 15/45-day limits to preserve your deductions.
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