How to switch between the old and new regime

For a salaried person, the regime is chosen in the return. You can compare both every year and pick the one with lower tax. The main limit in TaxCare's rules is that a belated return cannot use the old regime, so file on time if you want to keep it. If you have business or professional income, the rules on switching can be stricter, so ask a Tax Expert before you switch.

TaxCare's rules treat the choice as made in the return and closed to the old regime in a belated return. They are not yet signed off against the Income-tax Act, 2025.

The figures used for the tax year 2026-27 are provisional because they repeat the 2025-26 values.

Where the choice is made

There are two places a regime shows up:

1. At your employer. You may tell your employer which regime to use for TDS during the year. The way to tell your employer is set by your employer's payroll process. This only affects how much tax is deducted from your pay month by month.
2. In your return. The regime you pick when you file decides your actual tax. Any difference from the TDS deducted shows up as extra tax to pay or as a refund.

So, on TaxCare's rules, an employer's choice does not lock your return.

How to compare before you switch

1. Collect your income: salary, interest, rent, capital gains.
2. Collect your deduction details: 80C, 80D, NPS, home loan interest, education loan interest, donations.
3. Compute tax under the old regime: subtract the standard deduction (₹50,000) and the Chapter VI-A deductions you can claim, then apply the old slabs.
4. Compute tax under the new regime: subtract the standard deduction (₹75,000) and the employer's NPS contribution, then apply the new slabs and the rebate.
5. Compare the two after adding 4% cess.

The old regime has slabs of nil, 5%, 20% and 30%; the new regime has nil, 5%, 10%, 15%, 20%, 25% and 30%. See old vs new tax regime for the full table and worked examples, and new regime: what deductions are still allowed for the list.

When the old regime tends to win

The old regime usually needs large deductions to beat the new one. These can include:

• Section 80C up to ₹1,50,000.
• Extra NPS under 80CCD(1B), ₹50,000. See section 80CCD(1B).
• Health insurance under 80D, up to ₹1,00,000 in total across self and parents.
• Interest on a self-occupied home loan, up to ₹2,00,000.
• HRA, where your rent is high.

If your deductions are small, the new regime's lower slabs and ₹12,00,000 rebate (on the 2025-26 rules) usually give the lower tax. Only a calculation tells you for sure.

Restrictions to know

• Belated return. The old regime is closed. File by the due date to keep the choice. See ITR due dates for the tax year 2026-27.
• Revised return. If the original return was belated, the old regime stays closed in the revision.
• Updated return (ITR-U). The same date-based limits apply, and an updated return cannot reduce tax or increase a refund.
• Proofs. The old regime needs details of every deduction in the return's schedules. The department rejects a claim whose schedule does not add up.

What if you picked the wrong regime in the return?

You can file a revised return, within its window, and choose again. A revision after 31 December carries a fee of ₹5,000, or ₹1,000 if total income is ₹5,00,000 or less. A revision is possible until 31 March after the tax year ends, from the tax year 2025-26.

The one limit TaxCare applies is that a revision of a belated return cannot move to the old regime.

A short checklist before you decide

1. Total your likely deductions and proofs.
2. Calculate both taxes, including cess.
3. Check that your return will be on time.
4. Tell your employer, if you want payroll TDS to follow your choice.
5. Keep the proofs if you pick the old regime.

How TaxCare helps

TaxCare compares both regimes automatically from the data it fetches from the Income Tax portal: salary, TDS, interest and more. It shows the difference before you decide, and flags when a belated return closes the old regime. The choice is yours, and nothing is filed until you approve. Try the income tax calculator, or ask a Tax Expert.

This guide gives general information and is not professional tax advice.