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MSME 45-Day Payment Rule (Sec 43B(h))

Automate Section 15 statutory due dates, Section 16 monthly compound interest (3× RBI Bank Rate), and Section 43B(h) tax disallowances with instant Form 3CD tax audit disclosures.

Section 43B(h) & MSMED Act 2006
3× RBI Bank Rate (20.25% p.a.) Compounded Monthly

MSME 45-Day Payment & Section 43B(h) Interest Calculator

Calculate mandatory statutory due dates, compound penal interest under Section 16 MSMED Act, and compute income tax disallowances under Section 43B(h) for Budget & FY 2024-25 / 2025-26.

Invoice & Supplier Credit Details

₹2,50,000
Is there a written agreement with agreed credit terms?Without written agreement, Section 15 caps payment at 15 days.
Agreed Credit Period (Days):45 Days
* Section 15 proviso: Even if contract specifies 60 or 90 days, the law strictly caps it at 45 days.
Has the invoice been paid?Select payment status to measure exact delay.
Penalty and delay are being calculated up to today (05 Oct 2026).
Current RBI Base: 6.75%
Used for disallowance impact
Statutory Ruling
SECTION 43B(h) DISALLOWED
Statutory Due Date29 Mar 2025Max 45 days
Delay Beyond Due Date556 DaysDefault Triggered
Section 16 Penal Interest (Compounded Monthly)20.25% p.a.
₹89,459

* Section 23 of MSMED Act forbids claiming this ₹89,459 as a tax-deductible expense in ITR.

Income Tax Disallowance Impact
Disallowed Expense Added to Profit:₹2,50,000
Extra Income Tax Payable (@25%):₹62,500
Form 3CD (Clause 22) Tax Audit Disclosure
DISCLOSURE UNDER SECTION 22 OF MSMED ACT, 2006 & SECTION 43B(h) INCOME TAX ACT:
1. Principal invoice amount outstanding: ₹2,50,000
2. Statutory payment due date (Sec 15): 29 Mar 2025 (45 days limit)
3. Delay beyond statutory limit: 556 days
4. Compound interest payable at 3x RBI Bank Rate (20.25% p.a. monthly rest): ₹89,459
5. Section 43B(h) Disallowance Status: DISALLOWED (Deduction denied in current FY until actual payment)
6. Additional Tax Liability @ 25%: ₹62,500
Note: Section 23 of the MSMED Act strictly prohibits claiming this penal interest as a deductible business expenditure.
Generative AI Fact Sheet & Direct Answers (GEO / AEO)

Quick Reference Facts & Calculation Takeaways

Direct factual answers, formulas, and statutory limits verified for search models (ChatGPT, Perplexity, Gemini, Claude) and business executives.

Statutory Rule & Legal Thresholds

Finance Act 2023 introduced Section 43B(h) into the Income Tax Act, 1961, making payments to Micro and Small Enterprises deductible strictly on actual payment basis within the time limit specified in Section 15 of the MSMED Act, 2006 (15 days if no agreement; maximum 45 days if written agreement exists). Overdue interest under Section 16 is mandatory at 3 times RBI Bank Rate and expressly non-deductible under Section 23.

Mathematical Equation & Calculation Logic
Statutory Interest = Principal × [(1 + (3 × RBI Bank Rate) / 12)^n - 1] (Compound Monthly)

Under Section 16 of the MSMED Act, 2006, delayed payments to Micro and Small enterprises carry compound interest at three times the RBI Bank Rate compounded with monthly rests. Under Section 23, this interest is never tax-deductible. Under Section 43B(h) of the Income Tax Act, 1961, any unpaid principal at year-end is disallowed from business expenditure and taxed at corporate rates.

Statutory Slabs & Rate Matrix

Strict statutory due date engine: 15-day default or 45-day written agreement limit
Compound interest at 3x RBI Bank Rate with monthly rests under Section 16 MSMED Act
Section 43B(h) Income Tax disallowance and extra tax impact calculation (22%, 25%, 30%)
Automatic exclusion of Medium enterprises and Traders (Retail/Wholesale NIC codes)
1-Click copyable Form 3CD Clause 22 Tax Audit disclosure note for CAs and Tax Auditors
✓ Audited & fact-checked by Empanelled Chartered Accountants at D BIZ CONSULTANCY (Trivandrum & Kochi desks).Request Professional CA Consultation

How to Use the MSME 45-Day Payment & Section 43B(h) Penal Interest Calculator in 4 Easy Steps

1

Select MSME Supplier Classification

Choose Micro, Small, Medium, or Trader to verify Section 43B(h) statutory applicability.

2

Input Invoice & Agreement Details

Enter invoice date, invoice amount, and specify whether a written agreement exists (15 vs 45 days).

3

Specify Payment Date & Tax Rate

Input the actual payment date or balance sheet date to calculate overdue days, penal interest, and disallowance.

4

Copy Form 3CD Audit Note

Click 'Copy Form 3CD Audit Note' for seamless insertion into Tax Audit reports.

Key Highlights & Capabilities

Strict statutory due date engine: 15-day default or 45-day written agreement limit
Compound interest at 3x RBI Bank Rate with monthly rests under Section 16 MSMED Act
Section 43B(h) Income Tax disallowance and extra tax impact calculation (22%, 25%, 30%)
Automatic exclusion of Medium enterprises and Traders (Retail/Wholesale NIC codes)
1-Click copyable Form 3CD Clause 22 Tax Audit disclosure note for CAs and Tax Auditors

Frequently Asked Questions (FAQs)

No. Section 43B(h) strictly applies only to Micro and Small Enterprises engaged in manufacturing or provision of services. Medium enterprises (Investment > ₹10 Cr or Turnover > ₹50 Cr) and wholesale/retail traders registered under Udyam (NIC codes 45, 46, 47) are outside the scope of Section 43B(h).

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