Direct and Indirect Taxation · Input Tax Credit

Input Tax Credit in Special Situations: Reversal Rules

Updated 10 October 2026 · Fact-checked

Special-situation ITC rules deal with credit that must be reversed, restricted or newly allowed because facts change. Examples are non-payment to the supplier within 180 days, capital goods used for exempt supplies, switching registration status and transfer of business. Identify the situation, apply its formula or condition, then reverse or claim the credit with interest where due.

Understand Input Tax Credit in Special Situations

Normal ITC is simple: you buy for business, you hold a valid invoice, and you take the credit. Special situations arise when the facts change after you take the credit, or when the use of goods is mixed. The law then asks you to reverse the credit, claim it later, or carry it to another person.

Non-payment to supplier. If you do not pay the supplier the invoice value plus tax within 180 days of the invoice date, you must add back the ITC on the unpaid part to your output tax liability, with interest. When you pay later, you may claim that credit again. This rule does not apply to supplies on which you pay tax under reverse charge.

Capital goods used partly for exempt supplies. Capital goods have a useful life of five years (60 months) from the invoice date. If they are used only for taxable (including zero-rated) supplies, you get full credit. If they are used only for exempt supplies or non-business purposes, you get no credit. If they are used for both, you take the full credit but reverse a share every month during the useful life. Rule 43 gives the formula.

Change in registration status and transfer of business. If you move from composition to regular registration, or your exempt supplies become taxable, you may claim credit on inputs in stock, in work-in-progress, in finished goods and on capital goods, subject to the conditions. If you move to composition or your supplies become wholly exempt, you must reverse credit on stock and capital goods. For capital goods the reversal is the higher of the credit on the remaining life (reduced by 5 percentage points for every quarter or part of a quarter) and the tax on the transaction value. On sale, merger, demerger or transfer of a business with liabilities, the unutilised ITC in the ledger can be moved to the new entity, with a certificate and in the prescribed form.

The exam tests whether you can name the situation and compute the amount. Learn the trigger, the formula and the consequence for each one.

Key rules to remember

Useful life of capital goods: Useful life = 5 years = 60 months from the date of the invoice; Rule 43 uses 60 as the divisor. Part of a month counts as a full month only in the final calculation for real estate projects under sub-rule (2).
Monthly credit on common capital goods: Tm = Tc ÷ 60; Tc is the total of 'A' (ITC on the invoice) for common capital goods whose useful life is still running in the tax period. Tm is the credit attributable to that tax period.
Credit attributable to exempt supplies: Te = (E ÷ F) × Tr; E is the value of exempt supplies in the tax period. F is the total turnover in the State in that period. Clause (f) of Rule 43 is omitted, so in numericals use the monthly credit Tm as the credit to be apportioned.
Treatment of Te: Te + applicable interest is added to output tax liability in every tax period of the useful life; Compute Te separately for CGST, SGST/UTGST and IGST. Declare it in GSTR-3B.
No turnover in the period: Use E and F of the last tax period for which turnover details are available; This applies where there is no turnover or the information is not available.
180-day reversal (proportionate): ITC to reverse = Total ITC on invoice × (Unpaid amount ÷ Invoice value including tax); Add the amount to output tax with interest. It can be claimed again on payment to the supplier. It does not apply to reverse charge supplies.
Capital goods when registration status changes: Reversal = higher of (a) ITC on the remaining life, reduced by 5 percentage points per quarter or part, and (b) tax on the transaction value; Applies when you move to composition or your supplies become wholly exempt.
Capital goods moving from exclusive-exempt use to common use: Ineligible credit Tie = 5 percentage points for every quarter or part, for the period the goods were exclusive-exempt, added to output tax liability; Applies when goods earlier covered by clause (a) later fall under clause (c). Compute Tie separately for each tax.

How to solve Input Tax Credit in Special Situations questions

Use this method for any question on special-situation ITC. It keeps you from mixing up the rules.

1Read the facts and name the situation: unpaid supplier, capital goods with mixed use, change in registration, or transfer of business.
2List the facts you need: invoice date, invoice value, tax amount, payments made and dates, exempt turnover, total turnover, and months used.
3Check the trigger. For the 180-day rule, count days from the invoice date and check whether the supply is under reverse charge.
4For capital goods, classify the use: exclusive non-business or exempt (no credit), exclusive taxable (full credit), or common (credit and monthly reversal).
5Apply the formula in order: Tc, then Tm = Tc ÷ 60, then Te = (E ÷ F) × Tm. Work each tax head separately if the question gives them separately.
6State the consequence: add to output tax liability, pay interest if asked, and note any right to claim the credit again.
7Write the answer with the formula, the substitution and a one-line conclusion.

Quickest way: Three-line shortcut for mixed-use capital goods

When to use it: Use it when the question asks for the monthly reversal on capital goods used for both taxable and exempt supplies.

Divide the ITC on the capital goods by 60 to get the monthly credit.
Find the exempt ratio E ÷ F for that month. Reduce it to a simple fraction or percentage.
Multiply the monthly credit by the ratio. That is the amount you add to output tax for the month.

Common mistakes in Input Tax Credit in Special Situations

Dividing the ITC on capital goods by 12 or 5 instead of 60.
Students remember five years and divide by the number of years.
Fix: Rule 43 works monthly. Use 60 months, and always write Tm = Tc ÷ 60.
Reversing the whole ITC when only part of the invoice is unpaid under the 180-day rule.
Students treat any non-payment as a total reversal.
Fix: Reverse ITC only on the unpaid part, in proportion to the unpaid amount over the invoice value including tax.
Applying the 180-day rule to reverse charge supplies.
Students apply the rule to every inward supply.
Fix: The rule does not apply where you pay the tax yourself under reverse charge. Check for reverse charge before computing.
Using exempt turnover divided by exempt turnover plus taxable turnover, or the wrong total in F.
Students rebuild the ratio from memory.
Fix: F is the total turnover in the State in the tax period. Use the figure given for F. Do not add or subtract anything unless the question says so.
Forgetting that the reversal under Rule 43 continues every month of the useful life, and ignoring the interest.
Students treat the reversal as a one-time entry.
Fix: State that Te, with applicable interest, is added to output tax in each tax period of the useful life.
Taking credit on capital goods used exclusively for exempt supplies, or giving no credit on goods used exclusively for taxable and zero-rated supplies.
Students mix up clauses (a) and (b).
Fix: Exclusive exempt or non-business use: no credit. Exclusive taxable or zero-rated use: full credit. Mixed use: credit, with monthly reversal.

Worked examples

Example 1

Sharma Traders, Jaipur, bought goods on 1 January from Kapoor Enterprises. The invoice value is ₹5,90,000 (taxable value ₹5,00,000 plus GST at 18% of ₹90,000). By the end of 180 days from the invoice date, Sharma Traders had paid ₹2,36,000 only. The supply is not under reverse charge. Compute the ITC to be reversed.

Show the solution

The 180-day period has ended with part of the invoice unpaid, so ITC on the unpaid part must be added to output tax liability.
Unpaid amount = ₹5,90,000 − ₹2,36,000 = ₹3,54,000.
Ratio of unpaid amount to invoice value = 3,54,000 ÷ 5,90,000 = 0.6.
ITC to reverse = ₹90,000 × 0.6 = ₹54,000.
Interest is also payable on ₹54,000 as prescribed. The ₹54,000 can be claimed again when the balance is paid to the supplier.

Answer: ITC of ₹54,000 must be added to output tax liability with interest. It can be re-availed when the balance ₹3,54,000 is paid.

Example 2

Mehta Pharma Ltd. bought a machine for use in both taxable and exempt supplies. The ITC on the invoice is ₹1,20,000 (all capital goods, no other common capital goods). In a month, its exempt supplies in the State are ₹6,00,000 and total turnover in the State is ₹30,00,000. Compute Te for that month. If exempt supplies in the next month are ₹9,00,000 on the same total turnover, compute Te for that month.

Show the solution

Tc = ₹1,20,000, since the machine's useful life is running and it is the only common capital good.
Tm = Tc ÷ 60 = 1,20,000 ÷ 60 = ₹2,000 per month.
Month 1: E ÷ F = 6,00,000 ÷ 30,00,000 = 0.2. Te = 0.2 × 2,000 = ₹400.
Month 2: E ÷ F = 9,00,000 ÷ 30,00,000 = 0.3. Te = 0.3 × 2,000 = ₹600.
Each Te, with applicable interest, is added to the output tax liability for the month and shown in GSTR-3B. It is computed separately for each tax head.

Answer: Te is ₹400 for the first month and ₹600 for the second month. Add each to output tax liability with applicable interest.

Exam tips

In MCQs, check the keywords: 180 days means proportionate reversal with interest and re-claim on payment. 60 months means Tm = Tc ÷ 60. A change to composition means a higher-of reversal on capital goods.
In written answers, set out the formula, the substitution and the conclusion. Step marks go to the formula and the correct figure for each step.
Always read whether the question gives amounts separately for CGST, SGST and IGST. If so, compute each separately.
Count days carefully for the 180-day rule. Start from the invoice date, not the date of delivery or receipt of goods.
Where the question is silent on a fact, say so and state your assumption in one line.

Practice questions from Input Tax Credit

Input Tax Credit in Special Situations in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

CFA Level IIIPrivate Special Situations Overview

Input Tax Credit in Special Situations: frequently asked questions

What happens if I do not pay my supplier within 180 days?

You must reverse the ITC on the unpaid part of the invoice and add it to your output tax liability with interest. When you later pay the supplier, you can claim the credit again. The rule does not apply to supplies on which you pay tax under reverse charge.

How is ITC on capital goods used for exempt supplies reversed?

For common capital goods, you take the credit and reverse a share every month during the five-year (60-month) useful life. Work out Tm = Tc ÷ 60 and then Te = (E ÷ F) × Tm. Add Te with interest to output tax liability and declare it in GSTR-3B.

Do I get credit on capital goods used only for exempt supplies?

No. Credit on capital goods used exclusively for exempt supplies or for non-business purposes is only indicated in GSTR-3B and is not credited to the electronic credit ledger. Credit is allowed where the goods are used exclusively for supplies other than exempt supplies, including zero-rated supplies.

Can unutilised ITC be transferred when a business is transferred?

Yes, on sale, merger, demerger or transfer of a business with liabilities, the unutilised ITC in the electronic credit ledger can be moved to the new entity, subject to the prescribed conditions and form. The transferor must also give the certificate required by the rules.