Identify the precise change of use
The proviso to CGST Rule 43(1)(c) addresses capital goods earlier covered by clause (a) that subsequently enter clause (c). Clause (a) concerns exclusive non-business or exempt use; clause (c) concerns the common-capital-goods category. Subject to the applicable eligibility conditions, the rule credits invoice tax A and adds the ineligible amount attributable to earlier clause (a) use to output tax liability. This guide isolates that transition; it does not apply a composition-entry stock-credit formula or the disposal rule for a sale of machinery. ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos.
Keep invoice credit and prior-use liability as different lines
The current wording uses gross invoice credit with a corresponding prior-use liability amount, rather than simply crediting a reduced historical balance. Maintain both entries and their evidence. An economic net difference can help reconcile the working but should not be presented as permission to ignore the rule's separate credit and output-liability mechanism. Check actual return reporting against current instructions rather than inventing a row number. ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos.
Calculate the earlier-use amount by quarters or parts
The specified prior-use amount is calculated at five percentage points for every quarter or part during the period covered by clause (a). Identify the invoice date, exclusive-use history and actual transition date. Preserve the quarter-count reasoning and avoid substituting company-law depreciation, an estimated remaining market value or a reducing-balance calculation. The examples stipulate supported counted periods to isolate the arithmetic; they do not decide an unusual disputed date convention. ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos.
The useful-life clock does not restart
Rule 43 identifies five years from the invoice date for the capital goods' useful life. A change to common use does not create a fresh five-year invoice or a new full life. Keep the original invoice and expiry data in the common-asset register. Later common-use attribution is a separate recurring working under the applicable provisions, with relevant turnover and classification inputs; this article does not attempt to resolve every formula or special real-estate rule within Rule 43. ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos.
Compute tax heads separately
The proviso requires the prior-use amount to be computed separately for central, State, Union territory and integrated tax and declared in GSTR-3B. A single net company total can conceal an incorrect head-level liability. Reconcile invoice tax and the resulting liability separately for each relevant head, and retain any other eligibility and reporting evidence. This calculation does not manufacture credit where a separate statutory restriction applies. ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos.
Close the transition once, then maintain the asset
Prepare a one-time transition schedule and a continuing original-life record. Do not repeat the same prior-use adjustment merely because the asset appears in the following month's common-capital register. Conversely, do not treat completion of the one-time adjustment as proof that no subsequent common-use attribution is required. The six models assume a lawful qualifying change, otherwise eligible invoice credit and no independent restriction; they illustrate the transition mechanism, not final net GST payable. ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos.
Applicable primary references
ICAI April 2026 GST bare law: Rule 43(1)(a)–(e), including clause (c) provisos
Six worked illustrations
All facts and amounts below are fictional. Assumptions describe the model, not additional statutory rules.
Illustrative example 1: One counted quarter
Invoice tax A is ₹60,000 and the supported earlier exclusive-use period counts as one quarter or part. The prior-use amount is ₹3,000. The model shows ₹60,000 invoice credit and ₹3,000 added output liability, with a ₹57,000 arithmetic difference rather than a substitute net-credit instruction.
Illustrative example 2: Part-quarter affects the count
Assume an earlier-use interval contains one complete quarter plus a part of the next, giving two counted quarters. On A of ₹120,000, prior-use liability is ₹12,000, not ₹6,000 from ignoring the part-quarter. Gross invoice credit remains the separate ₹120,000 line.
Illustrative example 3: Linear percentage points
On A of ₹200,000 and three counted quarters, the prior-use percentage is 15% and amount ₹30,000. The arithmetic difference is ₹170,000. Applying successive 5% reducing-balance deductions would instead produce ₹171,475 and does not reproduce the specified method.
Illustrative example 4: Separate CGST and SGST
Assume invoice CGST ₹30,000 and SGST ₹30,000, with two counted quarters. Prior-use liability is ₹3,000 under each head, totalling ₹6,000 against ₹60,000 gross credit. A company-level difference of ₹54,000 does not remove the head-wise reporting requirement.
Illustrative example 5: Gross versus net reconciliation
Invoice tax is ₹180,000 and four counted quarters produce 20%, or ₹36,000, prior-use liability. The economic difference is ₹144,000. Do not record only ₹144,000 as if that alone described the current gross-credit/liability mechanism.
Illustrative example 6: Original life preserved
An invoice dated 1 April 2024 reaches its five-year anniversary on 1 April 2029. A qualifying transition on 1 April 2026 does not move that anniversary to 1 April 2031: three years remain to the original anniversary, not a new five. The two-year difference is a life-clock error, separate from calculating the earlier-use liability.
Ten-step verification table
| Step | Action | Evidence |
|---|---|---|
| 1 | Identify asset and invoice | Match the capital item and original tax document. |
| 2 | Confirm earlier category | Prove exclusive clause (a) use before transition. |
| 3 | Confirm new common category | Document the actual qualifying change. |
| 4 | Review independent eligibility | Check restrictions rather than assuming all invoice tax is claimable. |
| 5 | Count earlier-use periods | Retain quarters and part-quarter reasoning. |
| 6 | Calculate prior-use liability | Apply five percentage points per counted quarter. |
| 7 | Preserve gross invoice credit | Show credit separately from output liability. |
| 8 | Split tax heads | Compute each relevant tax component independently. |
| 9 | Retain original life | Do not restart the five-year invoice clock. |
| 10 | Continue attribution controls | Avoid repeating the transition adjustment and perform later applicable workings. |
Sixteen practitioner FAQs
1. Which transition does the guide address?
Capital goods moving from Rule 43(1)(a) to common-use clause (c).
2. Is this the composition-entry calculation?
No. It is a specific Rule 43 change-of-use mechanism.
3. Does the current wording use only a net credit?
No. It separates invoice credit and prior-use output liability.
4. What rate is used for prior use?
Five percentage points per quarter or part as specified in the proviso.
5. Can a part-quarter be ignored?
No. The wording expressly includes a part thereof.
6. Is the calculation reducing balance?
No. The examples apply percentage points to the original invoice-tax amount.
7. Can book depreciation replace it?
No. The statutory transition working is different.
8. Must tax heads be separate?
Yes. The proviso requires separate computation for the relevant tax components.
9. Which return does the proviso mention?
GSTR-3B, without this guide inventing a specific row number.
10. Does the useful life restart at transition?
No. The original invoice-date life remains relevant.
11. Does a positive working create credit despite another restriction?
No. Independent eligibility must be established.
12. Does this guide cover every later common-use formula?
No. Later attribution and special rules require their own workings.
13. Is the prior-use adjustment repeated every month?
Do not duplicate the same one-time transition adjustment.
14. Does completing it eliminate future common-use attribution?
No. Maintain the ongoing applicable controls separately.
15. Does the example compute final GST cash payment?
No. Other credits, liabilities and reporting rules are outside the isolated model.
16. What should the final transition file contain?
Original invoice, category history, transition evidence, period count, separate tax-head entries and unchanged life dates.
Conclusion
On a qualifying change from exclusive exempt/non-business use to common use, Rule 43(1)(c) separates invoice credit from the prior-use amount added to output liability. Do not silently replace both with a net credit.