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Income Tax · Updated for tax year 2026-27

Advance Tax Calculator with Interest u/s 424 & 425 (old 234B & 234C)

Advance tax is payable when your tax for the year, after TDS, is ₹10,000 or more: 15% by 15 June, 45% by 15 September, 75% by 15 December and 100% by 15 March. Shortfalls attract 1% a month interest under Section 425 (old sec. 234C) and Section 424 (old sec. 234B). Enter your estimated tax and payments to see the schedule and any interest.

Enter your details

Values you enterComputed values
Income type

Advance tax paid

Result

Due byPayCumulative
15 Jun 2026₹15,000₹15,000
15 Sep 2026₹30,000₹45,000
15 Dec 2026₹30,000₹75,000
15 Mar 2027₹25,000₹1,00,000
Sec 425 (old 234C) — 15 June (3 mo)₹450Interest u/s 425 (old 234C)₹450Interest u/s 424 (old 234B), 0 mo₹0Total interest₹450

Disclaimer: Computed to the best of our knowledge, as per the law — including the section changes under the Income-tax Act, 2025 — in force on the date this website was last deployed (28 Sep 2026). Results are estimates for guidance only and are not tax, legal or investment advice. Please verify with the Act, rules and notifications, or a qualified professional, before relying on them. Rates and limits last reviewed on 28 Sep 2026.

How to use the Advance Tax Calculator

  1. 1

    Estimate your total tax for the year — use the income tax calculator if you need to.

  2. 2

    Enter the TDS and TCS you expect for the year; advance tax is due only on the balance.

  3. 3

    Choose presumptive taxation if your income is taxed on a presumptive basis under Section 58 (old sec. 44AD / 44ADA) — then the whole amount is due by 15 March.

  4. 4

    Enter what you paid in each instalment and the date you will pay any balance, to see the interest.

Advance tax schedule and interest

Due by 15 Jun: 15% · 15 Sep: 45% · 15 Dec: 75% · 15 Mar: 100% (cumulative)

Sec 425 (old 234C): 1% × 3 months on the shortfall at 15 Jun, 15 Sep and 15 Dec; 1% × 1 month at 15 Mar

(no sec 425 interest if you paid at least 12% by June and 36% by September)

Sec 424 (old 234B): 1% a month on the unpaid tax from 1 April after the year until payment, if less than 90% was paid

Shortfalls are rounded down to the nearest ₹100 before interest is worked out. Resident senior citizens with no business or professional income do not have to pay advance tax.

Worked example

  • Estimated tax after TDS for FY 2026-27: ₹1,00,000. Instalments due: ₹15,000, ₹30,000, ₹30,000 and ₹25,000.
  • You pay nothing in June, then ₹45,000 in September, ₹30,000 in December and ₹25,000 in March.
  • The June shortfall of ₹15,000 costs 1% × 3 months = ₹450 under Section 425 (old sec. 234C). The later instalments are met, and since the full tax was paid by March there is no interest under Section 424 (old sec. 234B).

Who has to pay advance tax

Anyone whose tax for the year, after TDS and TCS, is ₹10,000 or more — typically salaried people with large interest, rental or capital-gains income, freelancers and business owners. Salaried people whose only income is salary usually don’t, because their employer deducts TDS.

Capital gains or winnings that arise suddenly during the year only need to be covered in the instalments after they arise. Advance tax is now governed by Section 404–408 (old sec. 207).

Frequently asked questions

15 June 2026 (15%), 15 September 2026 (45%), 15 December 2026 (75%) and 15 March 2027 (100%) — each percentage is cumulative.