Rs 50 Lakh Unpaid to an MSME Beyond 45 Days = Rs 12.5 Lakh Extra Tax for the Buyer. Section 43B(h) Is the Most Underreported Provision Affecting Invoice Discounting, TReDS Adoption, and MSME Cash Flow.
Most MSME owners do not know this provision exists. Most corporate buyers are pretending it does not apply to them. Most invoice discounting articles ignore it entirely.
Section 43B(h) of the Income Tax Act, effective from FY 2024-25, makes it financially painful for corporate buyers to delay payments to MSMEs. It does not force them to pay on time — it makes the alternative expensive.
This is the single biggest regulatory incentive for TReDS adoption, invoice discounting usage, and MSME payment compliance in India. Here is how it actually works.
What Section 43B(h) Actually Says
The Income Tax Act’s Section 43B lists expenses that are deductible only in the year of actual payment — regardless of when they were incurred (accrual basis).
Clause (h), added by the Finance Act 2023, adds a new category:
Any sum payable by the assessee to a micro or small enterprise beyond the time limit specified in Section 15 of the MSMED Act 2006.
In plain language: if you owe money to an MSME and you do not pay within the MSMED Act timeline, you cannot deduct that expense from your taxable income in the current year. You can deduct it only when you actually pay.
The Timeline Rules (MSMED Act Section 15)
| Scenario | Payment Deadline |
|---|---|
| No written agreement between buyer and MSME | 15 days from date of acceptance |
| Written agreement exists | Date agreed upon — but cannot exceed 45 days |
| Buyer does not communicate acceptance/rejection within 15 days of delivery | Deemed accepted on day 15 — payment clock starts |
Critical point: Many MSMEs accept payment terms of 60, 90, or 120 days from their corporate buyers. Under the MSMED Act, any contractual term exceeding 45 days is void to that extent. The 45-day cap is non-negotiable by law — even if the MSME “agreed” to 90 days.
The Tax Math: Why It Hurts
Example 1: Single MSME Invoice
| Parameter | Amount |
|---|---|
| Invoice value (goods supplied by MSME) | Rs 50,00,000 |
| Payment deadline under MSMED Act | 45 days |
| Actual payment by buyer | Day 90 (45 days late) |
| Disallowance under 43B(h) | Rs 50,00,000 added back to taxable income |
| Tax impact at 25% corporate rate | Rs 12,50,000 additional tax |
| Tax impact at 30% (old regime individual) | Rs 15,00,000 additional tax |
The buyer does not lose Rs 12.5 lakh permanently — the deduction is available in the year of actual payment. But the cash flow impact is immediate. And if the buyer consistently delays MSME payments, the disallowance accumulates across hundreds of invoices.
Example 2: Large Corporate with Rs 100 Crore MSME Payables
| Parameter | Amount |
|---|---|
| Annual purchases from registered MSMEs | Rs 100 crore |
| Average payment delay | 75 days (30 days beyond 45-day limit) |
| Outstanding beyond 45 days at year-end | Rs 40 crore (estimate) |
| 43B(h) disallowance | Rs 40 crore added to taxable income |
| Additional tax at 25% | Rs 10 crore |
For a company with Rs 100 crore in MSME payables, the tax penalty for delayed payments can exceed Rs 10 crore per year. This is not a theoretical risk — it is a line item that auditors and tax teams are now required to track.
Who It Applies To (And Who It Does Not)
Applies When ALL of These Are True:
- The supplier has valid Udyam Registration as a Micro or Small Enterprise (Medium Enterprises were originally excluded but are now included in the broader MSMED Act protections)
- The buyer follows accrual method of accounting (virtually all companies)
- Payment is not made within the MSMED Act timeline (15 or 45 days)
- The expense relates to goods or services supplied by the MSME (not loans, advances, or other transactions)
Does NOT Apply When:
- Supplier does not have Udyam Registration — even if they are a small business by size
- Supplier is a large enterprise
- Buyer follows cash method of accounting (rare for companies)
- The transaction is not a supply of goods or services (e.g., inter-company transfers)
The Udyam Registration Gap
| Metric | Number |
|---|---|
| Total MSMEs in India (estimated) | 6.3 crore |
| MSMEs with Udyam Registration | ~1.5 crore |
| Registration rate | ~24% |
This means 76% of MSMEs are not protected by Section 43B(h). For buyers, dealing with unregistered small businesses avoids the disallowance entirely — creating a perverse incentive against MSME formalization.
How 43B(h) Changes the Invoice Discounting Landscape
For MSME Sellers
Section 43B(h) is your strongest negotiation tool. Tell your buyer:
“If you pay us beyond 45 days, your accounts team will add Rs [amount] back to taxable income under Section 43B(h). At 25% tax rate, that costs you Rs [tax amount]. Instead, accept our invoice on [TReDS platform name] — we get paid in 24-48 hours through a bank, your payment obligation stays the same, and your 43B(h) compliance is automatic.”
This reframes TReDS as a solution to the buyer’s tax problem — not just your cash flow problem.
For Corporate Buyers
You now have three options:
- Pay within 45 days — Claim the deduction normally. But this strains your own working capital.
- Register on TReDS and accept invoices — The MSME gets paid by a bank within 48 hours. You pay the bank on the due date (within 45 days). 43B(h) is satisfied.
- Set up a reverse factoring/dynamic discounting program — Through Cashflo, Vayana, or your bank’s supply chain finance desk. MSME gets paid early. You pay the financier within 45 days.
Option 1 costs you working capital. Options 2 and 3 cost you nothing extra (the MSME bears the discount) while preserving your tax deduction.
For Invoice Discounting Platforms
43B(h) is the best thing that happened to TReDS volumes. It creates a tax penalty that makes the status quo (paying MSMEs in 90-120 days) financially irrational for any company that does the math.
TReDS volume growth from Rs 38,000 crore (FY24) to Rs 48,000 crore (FY25) is partly attributed to increased buyer compliance driven by 43B(h) awareness.
The Loopholes and Criticisms
Loophole 1: Avoid MSME Suppliers
Some corporates have reportedly shifted procurement to unregistered suppliers to avoid 43B(h). This defeats the purpose of MSME development and creates a two-tier supplier market.
Counter: The government is tightening this through mandatory TReDS registration and CPSE mandates. The space for avoidance is shrinking.
Loophole 2: Dispute the Invoice
If the buyer “disputes” the invoice, the 45-day clock may not start until the dispute is resolved. Some buyers use frivolous disputes to delay payments and defer the disallowance.
Counter: The MSMED Act has clear deemed acceptance provisions — if the buyer does not communicate rejection within 15 days of delivery, the goods/services are deemed accepted.
Loophole 3: Get Suppliers to Deregister
Reports suggest some buyers have pressured MSME suppliers to withdraw their Udyam Registration or not disclose it. Without registration, 43B(h) does not apply.
Counter: Udyam Registration provides access to TReDS, government procurement preference, CGTMSE credit guarantees, and other benefits. Deregistering to accommodate a buyer’s tax avoidance is a bad trade for the MSME.
Criticism: Harsh on Cash-Strapped Buyers
Not all payment delays are intentional. Some buyers delay MSME payments because their own customers have not paid them — creating a chain of delayed payments. 43B(h) penalizes the immediate buyer regardless of the reason for the delay.
Counter: The buyer has recourse — use invoice discounting or factoring to manage their own receivables. The law addresses the symptom (delayed MSME payments) because the root cause (payment culture) has resisted decades of moral suasion.
How to Verify 43B(h) Compliance
For MSMEs: Check If Your Buyer Is Compliant
- Confirm your Udyam Registration is active — Check at udyamregistration.gov.in
- Share your Udyam Registration number with your buyer’s accounts team — they need it to track 43B(h) exposure
- Track payment dates against invoice acceptance dates — maintain a log showing the 45-day calculation for each invoice
- If payment is delayed beyond 45 days: File a complaint on MSME Samadhaan portal — this creates a formal record
For Buyers: Track Your Exposure
- Identify all suppliers with Udyam Registration — request Udyam numbers from your supplier master data
- Flag invoices approaching 45 days — configure your ERP system to trigger alerts at day 30
- Calculate year-end disallowance — any MSME payable outstanding beyond 45 days as of March 31 is subject to 43B(h) disallowance
- Consider TReDS onboarding — automatic compliance. The MSME is paid within 48 hours. You pay the bank within the agreed tenure (max 45 days).
Section 43B(h) + MSMED Act Interest: Double Penalty
| Penalty | How It Works | Cost |
|---|---|---|
| Section 43B(h) disallowance | Expense added back to taxable income | 25-30% of invoice value in additional tax |
| MSMED Act Section 16 interest | Compound interest at 3x RBI bank rate | ~19.5% per annum (at current RBI bank rate of ~6.5%) |
| MSME Samadhaan complaint | Formal arbitration through MSEFC | Legal costs + mandatory interest award |
| Combined annual cost of delayed MSME payment | Tax penalty + penal interest + legal risk | 30-50% of invoice value annualized |
The combined cost of delayed MSME payments now exceeds the cost of invoice discounting on TReDS (8-10%) by a factor of 3-5x. For rational corporate buyers, paying the TReDS discount rate to ensure timely payment is dramatically cheaper than absorbing the 43B(h) disallowance plus MSMED Act interest.
The Bottom Line
Section 43B(h) does not force corporate buyers to pay MSMEs on time. It makes the alternative — delayed payment — financially expensive through tax disallowance.
For MSMEs: Get Udyam Registration if you do not have it. Disclose your MSME status to buyers. Use 43B(h) as a negotiation lever for TReDS adoption. File on Samadhaan if payments are delayed beyond 45 days.
For buyers: Register on TReDS. Accept MSME invoices on the platform. The 8-10% discount rate the MSME pays is their cost — your cost of non-compliance (25-30% tax disallowance + 19.5% penal interest) is far higher.
For investors: 43B(h) is bullish for TReDS volumes and invoice discounting adoption. As more corporates comply, the quality of invoices on platforms improves, buyer participation increases, and discount rates may compress. This is structural tailwind for the invoice discounting market in India.
This article is for educational purposes only. Consult a chartered accountant for specific tax compliance advice related to Section 43B(h). HonestMoney.in does not provide tax advisory services.