One free registration that cuts both ways
Most founders hear "MSME registration" and file it under nice to have someday — a certificate for a subsidy they may never claim. That badly undersells it. Udyam registration matters in two directions at once. As a supplier it puts a legal 45-day clock on everyone who buys from you and gives you a fast way to collect when they drag their feet. As a buyer, the same rule can quietly cost you a tax deduction if one of your vendors is a registered micro or small enterprise and you pay them late. So whether you are selling or buying — and every business does both — the MSME framework reaches your money. Here is how the registration works and what the 45-day rule actually does.
What counts as an MSME now — the 2025 limits
A Micro, Small or Medium Enterprise is defined by two numbers together: investment in plant, machinery or equipment and annual turnover. The thresholds were enhanced with effect from 1 April 2025 (announced in the Union Budget 2025-26), and the current bands are:
- Micro — investment up to ₹2.5 crore and turnover up to ₹10 crore.
- Small — investment up to ₹25 crore and turnover up to ₹100 crore.
- Medium — investment up to ₹125 crore and turnover up to ₹500 crore.
The test is composite: an enterprise must satisfy both limits for its category, and breaching either one pushes it up to the next band. Two details save a lot of confusion — export turnover is excluded when computing the turnover figure, and the classification is drawn automatically from your linked income-tax and GST data, so it stays honest to what you actually declare. Almost every young company, LLP, proprietorship or partnership starting out sits comfortably inside "Micro".
How Udyam registration actually works
Registration is on the government's Udyam Registration portal (udyamregistration.gov.in), and the process is deliberately light:
- It is free and fully online — there is no fee and no statutory requirement to pay an agent for it.
- It is self-declaration based, anchored to the Aadhaar of the proprietor, partner or authorised signatory. Your PAN and GSTIN are validated against government databases, and the investment and turnover figures are pulled from those records rather than typed in from scratch.
- You get a permanent Udyam Registration Number and an e-certificate. There is no renewal — the details refresh from your PAN/GST filings.
- An enterprise too informal to have PAN or GST — the smallest micro units — can still come on board through the Udyam Assist Platform, which onboards them via trusted intermediaries.
That is the whole registration. The value is entirely in what it unlocks.
What the badge gets you
A registered MSME becomes eligible for a stack of benefits built to lower the cost of being small:
- Collateral-free credit under the CGTMSE guarantee scheme, whose cover for micro and small enterprises was raised to ₹10 crore, plus classification as priority-sector lending for banks.
- Public-procurement preference — a share of government and PSU purchasing is reserved for micro and small enterprises, with tender-fee and earnest-money relaxations.
- Access to subsidies and interest concessions under various central and state schemes.
- And the one that touches every founder's cash flow: statutory protection against delayed payments.
The 45-day rule — your protection as a supplier
This is where the MSME badge earns its keep. Under the Micro, Small and Medium Enterprises Development (MSMED) Act, 2006, when a registered micro or small enterprise supplies goods or services, the buyer must pay within a hard limit set by Section 15:
- If there is a written agreement, the buyer must pay by the agreed date — but that date can never be more than 45 days from acceptance of the goods or services.
- If there is no written agreement, payment is due within 15 days of acceptance.
Miss that limit and Section 16 bites automatically: the buyer becomes liable to pay compound interest, with monthly rests, at three times the bank rate notified by the Reserve Bank of India — and that interest is not deductible in the buyer's tax computation. A supplier who is not paid can escalate through the MSME Samadhaan portal to the Micro and Small Enterprise Facilitation Council, a far faster route than an ordinary recovery suit. In practice, simply printing your Udyam number on your invoices puts every customer on notice that the clock is running.
The other edge — Section 43B(h), your risk as a buyer
Now flip it around, because this is the part that catches profitable, well-run companies off guard. Section 43B(h) of the Income-tax Act — inserted with effect from assessment year 2024-25 (financial year 2023-24) — says that any amount you owe to a micro or small enterprise for goods or services is deductible only in the year you actually pay it, unless you pay within the Section 15 time limit above.
The sting is in one crucial difference from the rest of Section 43B. For most items — statutory dues, bonus, interest to banks — you keep the deduction as long as you pay before the due date for filing your return. Clause (h) does not get that grace. If you owe a micro or small supplier and you cross 45 days (or 15 where there is no agreement), the expense is disallowed for that year and added back to your taxable income, and you only get the deduction in the later year when the money actually goes out — even if you clear it a week before you file. Your tax auditor is required to report the unpaid micro-and-small dues in the tax audit report (Form 3CD), so the add-back is visible and hard to miss. Two limits on the provision are worth knowing: it applies to dues to micro and small enterprises only (not medium), and only where the supplier is registered under the MSMED Act — which is precisely why you need to know your vendors' Udyam status.
The practical takeaway is symmetrical. Register so your own receivables are protected; track which of your payables are to registered MSEs so a slow payment does not turn into a tax bill.
Where this sits for a founder
Udyam registration is one of the early housekeeping steps that belongs right after you choose a structure and incorporate — cheaper and quicker than most founders expect, and worth doing whether you set up a private limited company, LLP or proprietorship. The 43B(h) side then becomes a recurring discipline that sits on the same compliance calendar as your other annual dues, because vendor payment timing now has a direct tax consequence. For a funded startup, the priority-lending and procurement benefits stack neatly on top of the tax and recognition benefits on the startup track.
How we handle it at RDA, Baner
At RDA Advisory, Baner, we register your enterprise on Udyam and then build the 45-day rule into how we run your books. On the supplier side we get you the Udyam number and make sure it is on your invoices so your receivables carry the statutory clock. On the buyer side we flag which of your vendors are registered micro and small enterprises, watch the payment window, and keep your Section 43B(h) exposure off the add-back list at tax-audit time — so a late payment never quietly becomes disallowed. Office No. 102, Snehraj Apartment, Baner, Pune 411045 · call +91 77570 45059.
Registered as an MSME yet — or tracking your MSME payables?
Whether you want the Udyam registration done or you buy from small suppliers and want your 43B(h) exposure controlled, RDA handles both sides — the registration, the invoicing discipline, and the vendor-payment tracking that keeps your deductions intact. Book a consult at rdatax.in or call +91 77570 45059, or see our business setup and registration service. RDA Advisory, Baner, Pune.
Verification note: The requirements described here are based on the Micro, Small and Medium Enterprises Development (MSMED) Act, 2006 and the classification notified by the Ministry of Micro, Small and Medium Enterprises, and on the Income-tax Act, 1961. The revised classification limits for micro, small and medium enterprises (investment up to ₹2.5 crore / ₹25 crore / ₹125 crore and turnover up to ₹10 crore / ₹100 crore / ₹500 crore, on a composite basis and excluding export turnover) took effect on 1 April 2025 as announced in the Union Budget 2025-26; registration is through the Udyam Registration portal on a self-declaration basis linked to Aadhaar, PAN and GSTIN, with the Udyam Assist Platform for informal micro enterprises. The delayed-payment provisions under Section 15 of the MSMED Act (payment within the agreed date not exceeding forty-five days, or within fifteen days where there is no agreement) and Section 16 (compound interest with monthly rests at three times the bank rate notified by the Reserve Bank of India) apply to registered micro and small enterprises, with recourse through the Micro and Small Enterprise Facilitation Council and the MSME Samadhaan portal. Section 43B(h) of the Income-tax Act, inserted with effect from assessment year 2024-25, allows a deduction for sums payable to a micro or small enterprise only in the previous year of actual payment where payment is not made within the time limit under Section 15 of the MSMED Act, and the general proviso permitting deduction on payment before the return due date does not apply to clause (h). Thresholds, schemes, forms and time limits are periodically revised; confirm the current position for your enterprise with your CA. This is general information, not legal or professional advice.
