How to Use ChatGPT and Claude to Calculate Deferred Tax: A Step-by-Step Guide for CAs
ChatGPT, Claude or Gemini can build a deferred tax working if you give it the book and tax bases, the applicable framework (AS 22 or Ind AS 12) and the tax rate, and ask it to show every line. It will make arithmetic and recognition errors unless you check them, so use it for the layout and first pass, and verify each figure yourself.
This guide walks through five prompts and a worked example with figures computed by hand, so you can test any AI answer against a known result.
What can ChatGPT or Claude do here, and what should you never delegate?
| Reasonable to use AI for | Never delegate |
|---|---|
| Laying out the working table | Deciding the tax rate that applies to your client |
| Classifying items as taxable or deductible differences, for you to confirm | Judging whether future taxable profit is probable, or virtual certainty exists |
| First-pass arithmetic (to be recomputed) | Final figures posted to the books |
| Drafting the note disclosure format | Concluding on recoverability of losses or MAT credit |
Step 1: Set up a safe workspace
Do not paste client names, PAN, GSTIN, CIN or balances that identify the client. Round the numbers, rename the entity "Company A" and keep the real ledger in your own file. Use a tool setting that does not train on your inputs. See the DPDP-safe prompt template library for anonymisation patterns.
Step 2: Gather the inputs in a table
Deferred tax needs, for each item, the book carrying amount and the tax base at both dates. Collect:
- Fixed assets: book WDV and tax WDV (see how Schedule II and income tax depreciation diverge).
- Provisions and accruals allowed only on payment, such as gratuity, leave encashment and bonus items under section 43B.
- Carried-forward business losses and unabsorbed depreciation.
- The tax rate and the framework.
Example input (Rs. lakh, synthetic):
| Item | Opening book | Opening tax base | Closing book | Closing tax base |
|---|---|---|---|---|
| Fixed assets (WDV) | 700 | 580 | 800 | 600 |
| Provision for gratuity | 30 | 0 | 40 | 0 |
| Provision for leave encashment | 10 | 0 | 20 | 0 |
| Unabsorbed business loss | n/a | 50 | n/a | 50 |
Rate: 25.17% (company under section 115BAA; 22% plus 10% surcharge plus 4% cess = 25.168%).
Step 3: Prompt the AI to classify each item
Act as a chartered accountant's assistant. Framework: [Ind AS 12 / AS 22].
For each item in the table below, state (a) the temporary difference
(book carrying amount minus tax base for assets; tax base minus carrying
amount for liabilities), (b) whether it is a taxable or deductible
temporary difference, and (c) whether it gives rise to a DTL or DTA.
Show the working. If the item is a carried-forward loss, say which
recognition test applies under the framework and do NOT assume it is met.
Do not compute tax yet. List your assumptions.
[paste table]
Expected classification: fixed assets are a taxable difference (book WDV above tax WDV), so a DTL; the two provisions are deductible differences, so DTAs; the loss is a deductible item subject to a recognition test.
Step 4: Prompt the AI to compute DTA / DTL and the movement
Using the classification above and a tax rate of 25.17% (enacted rate
for the reversal period), compute for OPENING and CLOSING:
1. Deferred tax liability and asset per item, rounded to 2 decimals in Rs. lakh.
2. Net deferred tax position.
3. The movement, i.e. the deferred tax charge / (credit) to profit or loss,
assuming no items go through OCI or equity.
Show each multiplication. Recognise a DTA on the loss ONLY if I state
[recognition evidence: ____]. Otherwise show it as unrecognised.
Re-check the arithmetic and list any assumption.
Step 5: Ask for the disclosure table
Prepare a table for the deferred tax note: for each component,
opening balance, charge/(credit) to P&L, charge/(credit) to OCI, closing
balance, split into deferred tax liabilities and deferred tax assets, then
the net. State whether DTA and DTL can be set off (same taxation
authority and legal right to set off current tax) and list the unrecognised
deductible differences or losses separately. Use only my figures.
What does a good answer look like?
Here is the correct result, computed by hand at 25.17%. AI output will vary from run to run, so treat any AI table as illustrative and compare it with these figures.
Temporary differences
| Item | Closing difference (Rs. lakh) | Type |
|---|---|---|
| Fixed assets: 800 - 600 | 200 (opening 120) | Taxable, DTL |
| Gratuity: 40 - 0 | 40 (opening 30) | Deductible, DTA |
| Leave encashment: 20 - 0 | 20 (opening 10) | Deductible, DTA |
Deferred tax
| Item | Opening | Closing | Movement to P&L |
|---|---|---|---|
| DTL, fixed assets | 30.20 (120 x 25.17%) | 50.34 (200 x 25.17%) | 20.14 charge |
| DTA, gratuity | 7.55 | 10.07 | 2.52 credit |
| DTA, leave encashment | 2.52 | 5.03 | 2.52 credit |
| Net DTL | 20.14 | 35.24 | 15.10 charge |
Check: the net taxable difference movement is 80 (assets) less 10 (gratuity) less 10 (leave) = 60, and 60 x 25.17% = 15.102, matching the 15.10 charge. Small 0.01 differences in the opening column arise from rounding; the unrounded net opening is 20.136 and closing 35.238.
Loss. The unabsorbed loss of 50 would give a potential DTA of 12.59 (50 x 25.17%). Without the evidence the framework demands (below), it is not recognised and is disclosed as an unrecognised item. If it were recognised at both dates, opening and closing net DTL would each fall by 12.59 (to 7.55 and 22.65) and the P&L charge would stay at 15.10. Recognising it only at closing would instead give a credit of 12.59 in the year.
AS 22 vs Ind AS 12: what changes in this working?
| Point | AS 22 | Ind AS 12 |
|---|---|---|
| Basis | Timing differences between accounting income and taxable income | Temporary differences between carrying amount and tax base (balance sheet method) |
| DTA on ordinary deductible items | Recognised where there is reasonable certainty of future taxable income | Recognised where it is probable that taxable profit will be available |
| DTA on carried-forward losses / unabsorbed depreciation | Only where there is virtual certainty supported by convincing evidence | Only to the extent of probable taxable profit; a history of recent losses requires convincing other evidence |
| Tax rate | Enacted or substantively enacted at the balance sheet date | Same |
| Presentation | Set-off only where legal right and same authority | Same |
In this example the fixed asset and provision numbers are identical under both; the frameworks diverge on losses and recognition tests, not on the arithmetic. Verify paragraph-level wording against the ICAI text for your engagement.
Where does AI go wrong?
- Arithmetic. Models mis-multiply or round early. Recompute each line: difference times rate.
- Wrong rate. It may pick 30% or 22% by default. For a company under section 115BAA the effective rate is 25.17%; for others use the rate enacted or substantively enacted for the reversal period.
- Sign errors. Book WDV above tax WDV is a DTL. Flipped classification reverses the answer.
- Mixing AS 22 and Ind AS 12. Watch for "temporary difference" used in an AS 22 answer, or "virtual certainty" in an Ind AS 12 one.
- Ignoring recognition tests. AI often books a DTA on losses automatically. Recoverability is your judgment.
Verify in 60 seconds
Enter the same synthetic figures into CORAA's free Deferred Tax Calculator at 25.17%. The net position should match your hand figure of 35.24 net DTL. Then compare your layout with the deferred tax working paper in the Working Papers hub. A mismatch usually means a sign error or a wrong rate.
Which assistant should you use?
ChatGPT, Claude and Gemini can all handle this if you paste in the figures and ask for shown working. Ask any of them to recompute independently, and prefer a tool that can run a spreadsheet or code for arithmetic where available. None replaces your own check.
Last reviewed: 26 September 2026.
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Frequently asked questions
Can ChatGPT calculate deferred tax accurately?
It can lay out the working, but arithmetic and rate errors are common. Recompute each line and verify against a calculator.
What tax rate should I use for deferred tax in India?
The rate enacted or substantively enacted at the reporting date that applies when the difference reverses. For a company that has opted for section 115BAA, the effective rate is 25.17%.
Do I recognise a DTA on carried-forward losses?
Only if the framework's test is met: virtual certainty with convincing evidence under AS 22, or probable taxable profit with convincing evidence where there is a loss history under Ind AS 12.
Is deferred tax on fixed assets always a DTL?
No. It is a DTL when book WDV exceeds tax WDV, and a DTA when tax WDV exceeds book WDV.
Can DTA and DTL be netted?
Only where the entity has a legally enforceable right to set off current tax and the balances relate to the same taxation authority.
Should I paste the client trial balance into the AI?
No. Use anonymised, rounded figures and keep real data in your own files.