Tax Regime Copilot
FY 2026-27

Improve your tax savings

Upload your salary slip or offer letter to know how you can optimize your tax. Built for salaried people.

Nothing leaves this browser. Your document is read locally and is never uploaded — not to a server, not to a model. There's no account, no database, and no analytics. Close the tab and it's gone.

Pick what you're starting from.

How this works, and what it deliberately won't do

Every rupee on the result page is computed by a deterministic engine in this file, from a rulepack of current-year rates. No language model touches the arithmetic — a model is used only to answer follow-up questions in plain English, through a shared backend with no setup needed.

The engine is checked against 21 hand-built salary profiles whose expected answers were computed by a second, independently written implementation — including the ₹12 lakh rebate cliff, marginal relief just past it, the ₹50 lakh surcharge boundary, and a profile that sits ten rupees from the break-even point.

Out of scope on purpose: business or freelance income, capital gains, foreign assets, non-resident status, more than two employers. You'll be asked about these up front and told plainly if you need a CA.

Step 1 of 3

Here's what I read. Fix anything that's wrong.

Read as
To read this as a different kind of document, start over.

Annual figures

Annual gross salary
₹0
Step 2 of 3

Anything here apply to you this year?

These push a return beyond what a payslip can answer. Better to say so now than twenty questions in.

Good catch — this one's worth getting right

What you ticked changes the computation in ways a payslip alone can't settle. Rather than guess, here's exactly what to hand your CA — plus a salary-only estimate you can use right now.

Your salary-only numbers are ready

The salary side of the computation is done and correct — it's only the items you ticked above that need a professional. Your CA can start from these numbers.

Step 3 of 3

A few questions — only the ones that can change the answer

Deductions needed for the old regime to win
Found so far₹0
The answer

How confident this is

The computation, line by line

Every row shows where the number came from and which rule shaped it. Check the ones marked as estimates.

Review & edit your answers

Change any value and the verdict above updates instantly.

What to do next

What this assumed

Save this session

Nothing was stored anywhere. Download the session file and re-import it next February — the interview will pick up where it left off instead of starting from scratch.

Enter your salary numbers

Annual figures. If you only know monthly, multiply by twelve — or better, take them from your Form 16 Part B or your HR portal's tax sheet.

Annual gross salary
₹0

Golden test suite

Twenty-one salary profiles. Expected values were produced by a second implementation written independently of the engine — if the two disagree, one of them is wrong and neither ships.