The MSME 45-day rule cuts both ways for tour operators

Your Ladakh transporter invoices you ₹2,80,000 in June. You pay it in October, once the season's cash has actually come in, the way you've probably always done it. Under the MSME 45-day payment rule, that habit can now cost you real tax money, not just an awkward call from the transport union.

Section 43B(h) of the Income Tax Act turned a common operator practice, paying ground vendors whenever the cash allows, into something with a hard deadline. Miss it, and the amount you owe gets added back to your taxable income at year end, whether or not you've paid it by the time you file.

The same law also hands you a lever you might not have used yet: a way to make a slow-paying corporate client feel a real interest clock. This post covers both sides, and where the law is genuinely unclear, it says so.

What Section 43B(h) actually disallows

Section 43B(h) says that if you owe money to a Udyam-registered micro or small enterprise vendor, and that amount is still unpaid at the end of the financial year past the 45-day limit (or 15 days if there's no written agreement), you cannot claim it as a business expense for that year. Instead of a deduction, the unpaid amount gets added back to your taxable profit, so you pay tax on money you haven't actually spent (Bankbazaar). The rule, inserted by the Finance Act 2023, took effect from FY 2023-24 (AY 2024-25) and has now run through three filing cycles.

For most kinds of business this is a bookkeeping nuisance you handle once and move past. For a tour operator it can be a genuine tax hit, because so much of what you owe at any given point sits with exactly the kind of vendor this rule targets: the transporter who ran your Ladakh convoy, the local handling agent in Kochi, the trekking guide collective in Manali, the homestay owner in Coorg. These are, overwhelmingly, small operations, and many qualify as Udyam-registered micro enterprises whether or not you've ever asked them for a registration number.

Micro, small or medium: which of your vendors actually count

Only vendors classified as micro or small enterprises under Udyam registration trigger Section 43B(h). Medium enterprises are excluded entirely from this particular provision. As of August 2026, the current thresholds (revised upward from 1 April 2025) are set out below (Udyam Registration portal).

Classification	Investment limit	Turnover limit	Covered by the 45-day rule
Micro	Up to ₹2.5 crore	Up to ₹10 crore	Yes
Small	Up to ₹25 crore	Up to ₹100 crore	Yes
Medium	Up to ₹125 crore	Up to ₹500 crore	No

Udyam registration explicitly covers service businesses, not just manufacturing. A single registration can list "any number of activities including manufacturing or service or both," so a transporter, a homestay, or a local handling agent registers the same way a small factory would (Udyam Registration portal). Note that some older articles online still quote the pre-revision, lower thresholds, so don't trust a figure you can't date.

Before you assume a vendor is covered, or that they aren't, check. Ask for their Udyam Registration Number and verify it stayed live on the portal. It takes a minute and settles the question rather than leaving it to guesswork at year end.

"Date of acceptance": what starts the clock on an eight-day tour

The 45-day (or 15-day) clock starts from the date you accept the goods or service, not from the date the invoice lands in your inbox. For a single delivery, like a vehicle rental invoiced after the vehicle is returned, that's straightforward. For a service that runs across several days, such as ground handling through an eight-day tour, exactly when "acceptance" happens is genuinely underexplored in the guidance currently available, and this post won't pretend otherwise.

The practical question is whether the clock starts on day one of the tour, when the vendor's service begins, or on tour completion, when the final invoice is typically raised and reconciled. Treating the final invoice or tour-completion date as your working marker is the more conservative reading, and it's the one that gives you the longer runway. But confirm your specific invoicing cutoff with your CA before you build a payment calendar around it, particularly for long multi-city or multi-vendor itineraries where several clocks could plausibly be running at once.

The math: what an unpaid vendor bill costs you at tax time

Example: Say your agency's FY 2026-27 taxable profit, before any 43B(h) adjustment, works out to ₹18,00,000. Buried in payables is a ₹3,00,000 transporter bill for a Ladakh season, accepted in June, still unpaid on 31 March because the season's cash hadn't fully cleared. Under Section 43B(h), that ₹3,00,000 cannot be claimed as a deduction for this year. It gets added back, taking taxable profit to ₹21,00,000. At a 30% effective slab, that's roughly ₹90,000 of extra tax on money you haven't actually paid out yet. This is illustrative maths only. Run your own numbers past your CA before you rely on them.

The amount typically becomes deductible in whichever year you actually pay it, the way most other 43B clauses work on a paid basis. Confirm the exact mechanics for this clause with your CA rather than assuming it carries forward automatically, since that specific detail wasn't something this post could verify from a primary source.

Writing the 45-day term into every vendor agreement

A written agreement is what lets your payment clock run to 45 days instead of collapsing to 15. Without one, on paper, you owe a Udyam-registered vendor within 15 days of accepting their service, which is an unrealistic window for most seasonal operators juggling multiple vendor payments through a busy quarter.

A working clause is short: "Payment for services rendered under this agreement shall be made within 45 days of [Operator]'s acceptance of the completed service, in accordance with the MSMED Act, 2006." Have your CA or lawyer confirm the exact clause language before you paste it in, then use it in every ground-handling, transport, and guide contract you sign, the same way you'd formalise a hotel rate contract rather than working off a WhatsApp confirmation.

Two more things worth building into onboarding:

1. Ask every new local vendor for their Udyam Registration Number before the first invoice, not after a payment dispute.
2. Keep a simple register (even a spreadsheet column) of which vendors are Udyam-registered and which aren't, so you know at a glance whose invoices carry the 45-day exposure.

MSME Form-1: who actually has to file it

MSME Form-1 is a Ministry of Corporate Affairs filing, not a general obligation on every travel agency. Only companies registered under the Companies Act, with amounts outstanding beyond 45 days to Udyam-registered micro or small vendors, have to file it. A proprietorship, partnership, or LLP has no MSME Form-1 obligation at all, even though the Section 43B(h) tax disallowance itself applies to any of them, regardless of entity type (IndiaFilings).

Reporting period	Filing due by
April to September	31 October
October to March	30 April

The form discloses supplier names and PAN, the amount owed, how long it's been outstanding, and the reason for the delay. Nothing to disclose means nothing to file. Missing the filing, where it applies, carries a penalty under Section 405(4) of the Companies Act: ₹20,000 upfront, plus ₹1,000 for every day the default continues, capped at ₹3 lakh (IndiaFilings). Build this into your existing travel-agency compliance calendar if your agency is incorporated, alongside your GST and TDS deadlines, rather than tracking it separately and forgetting it.

When a corporate client sits on your invoice: Samadhaan and the interest clock

Once your own agency is Udyam-registered, you can use the same law against a slow-paying client. The MSME Samadhaan portal lets a registered micro or small enterprise file a case against a buyer who has sat on an invoice past the payment deadline, and the buyer becomes liable for compound interest at three times the RBI-notified bank rate, which isn't deductible as a business expense for them either (IndiaFilings).

Filing requires your own Udyam Registration Number, OTP verification through your registered email, and uploading the work order and invoice as PDFs (capped at 1 MB each) under the portal's "Entrepreneur/MSE Units" tab. The Micro and Small Enterprise Facilitation Council examines the case and can direct the buyer to pay the outstanding amount plus accrued interest.

Careful: Don't quote a specific current bank-rate percentage in a client conversation, a demand letter, or your own calculations. The RBI-notified bank rate moves with monetary policy, and this post deliberately doesn't print one. Confirm the live figure with your CA or on rbi.org.in before you use it in anything that involves real money.

Samadhaan is a formal, last-resort escalation, worth knowing exists but not the first move on every overdue invoice. For the softer stages before you get there, a structured approach to chasing dues from a client or sub-agent who owes you money covers the ground that usually resolves things before a portal filing is needed. It's also worth building payment discipline into how you win and manage corporate travel clients in the first place, since corporate accounts are disproportionately the slow payers this rule was built to pressure.

Common questions

Does the MSME 45-day rule apply to traders?

Whether the 45-day rule applies to pure trading businesses, as distinct from manufacturers or service providers, is contested in trade commentary and isn't settled here by a primary source. A travel agency operates squarely as a service provider, so this question matters more for your suppliers' classification than your own. If it affects how you treat a specific vendor, confirm the position with your CA rather than relying on an online interpretation.

From what date does the MSME 45-day payment rule apply?

Section 43B(h) took effect from 1 April 2024, applicable from Assessment Year 2024-25 (Financial Year 2023-24) onward (Bankbazaar). It has now applied through three full filing cycles, including the return you're likely preparing for FY 2025-26 right now.

What interest rate applies to a delayed MSME payment?

The MSMED Act sets penal interest at three times the RBI-notified bank rate, compounded, once a buyer pays a registered micro or small vendor beyond the deadline. The exact current rate moves with RBI policy, so don't rely on any specific percentage circulating online. Confirm the live figure with your CA or on rbi.org.in before using it in a real calculation.

The short version

• Section 43B(h) disallows the deduction for any amount owed to a Udyam-registered micro or small vendor that stays unpaid past 45 days (15 without a written agreement) at year end.
• Medium enterprises aren't covered. Verify each vendor's actual Udyam classification instead of assuming it either way.
• Get payment terms in writing with every ground vendor. It's what keeps your clock at 45 days instead of 15.
• MSME Form-1 is an MCA filing for registered companies only, proprietorships, partnerships and LLPs don't file it, but the tax disallowance itself applies to every entity type.
• Once you're Udyam-registered yourself, the MSME Samadhaan portal lets you pursue a slow-paying corporate client for compound interest at three times the RBI-notified bank rate.
• Track the 45-day clock from the date of acceptance on every vendor bill, and confirm the specific mechanics with your CA before this rule costs you at tax time.