How to use the advance tax calculator
- Pick the financial year. FY 2026-27 is the current year, with the 15 December 2026 instalment coming next.
- Enter your estimated tax for the year, or switch to Estimate from income to work it out from salary, business income and capital gains under the new or old regime.
- Enter the TDS and TCS you expect. Advance tax is only due on the balance, and only if that balance is ₹10,000 or more.
- Enter what you have already paid in each period. The top box shows how much to pay by the next due date and how much interest you avoid by paying on time.
- Copy the summary, download the CSV, or save the share link to come back to the same numbers.
Advance tax due dates for FY 2026-27
| Due date | Cumulative advance tax | No 234C interest if paid at least | Interest on shortfall |
|---|
| 15 June 2026 | 15% | 12% | 1% × 3 months |
| 15 September 2026 | 45% | 36% | 1% × 3 months |
| 15 December 2026 | 75% | 75% | 1% × 3 months |
| 15 March 2027 | 100% | 100% | 1% × 1 month |
| 15 March 2027 (presumptive 44AD/44ADA) | 100% in one go | 100% | 1% × 1 month |
Payments made between 16 and 31 March 2027 still count as advance tax for section 234B, but are late for the 15 March instalment under 234C.
Interest under section 234C and 234B, with an example
Say your tax after TDS for FY 2026-27 is ₹1,00,000 and you pay nothing until 15 December, when you pay ₹75,000, then ₹25,000 by 15 March:
- June: 15% due (₹15,000), nothing paid → ₹15,000 × 1% × 3 = ₹450
- September: 45% due (₹45,000), nothing paid → ₹45,000 × 1% × 3 = ₹1,350
- December and March: fully paid → ₹0
- 234B: 100% paid by 31 March, more than 90% → ₹0
Total interest: ₹1,800. If you paid nothing at all and cleared the full ₹1,00,000 when filing on 31 July 2027, 234C would be ₹5,050 (₹450 + ₹1,350 + ₹2,250 + ₹1,000) and 234B ₹4,000 (4 months × 1%), a total of ₹9,050.
Section numbers under the Income-tax Act, 2025
From 1 April 2026 the Income-tax Act, 2025 replaced the 1961 Act. The rates and due dates are the same, but the section numbers changed: interest for short advance tax (234B) is now section 424, interest for late instalments (234C) is section 425, and presumptive taxation (44AD/44ADA) is section 58. FY 2025-26 still uses the old numbers. The calculator shows the right labels for the year you pick.
Frequently asked questions
What are the advance tax due dates for FY 2026-27?
15 June 2026 (15% of the year's tax), 15 September 2026 (45%), 15 December 2026 (75%) and 15 March 2027 (100%). The percentages are cumulative, so by 15 December you should have paid three quarters of your estimated tax after TDS. Anything paid by 31 March 2027 still counts as advance tax.
Who has to pay advance tax?
Anyone whose tax for the year, after TDS and TCS, is ₹10,000 or more. This usually means freelancers, consultants, traders, business owners, and salaried people with large interest, rent, capital gains or other income that has no TDS. Resident senior citizens (60 or older) with no business or professional income are exempt.
How is interest under section 234C (now section 425) calculated?
It is 1% a month on the shortfall at each due date: 3 months for the June, September and December instalments and 1 month for March. There is no interest for June if you paid at least 12% of the tax, or for September if you paid at least 36%. The shortfall is rounded down to the nearest ₹100 before the interest is worked out.
How is interest under section 234B (now section 424) calculated?
If your advance tax paid by 31 March is less than 90% of your tax after TDS, you pay 1% a month on the unpaid tax. It runs from 1 April after the year ends until the date you pay the balance, and a part of a month counts as a full month. Paying the balance on 31 July 2027 means 4 months of interest.
I missed the June and September instalments. What should I do now?
Pay the shortfall as soon as you can, at the latest by 15 December. Interest under 234C for June and September is fixed at 3 months each whatever date you pay. But if you catch up to 75% by 15 December, the December instalment carries no interest, and paying 90% or more by 31 March avoids 234B.
Do I need to pay advance tax on capital gains from selling shares?
Yes, if the tax after TDS crosses ₹10,000. Capital gains cannot be predicted, so 234C interest is not charged on an earlier instalment if you include the gain in the instalments due after you sell. Use the capital gains option in this calculator to see this relief.
What if I am a freelancer or small business using presumptive taxation?
If you use the presumptive scheme (section 58 of the Income-tax Act, 2025, formerly 44AD or 44ADA), you can pay all the advance tax in one go by 15 March. Tick “Presumptive (44AD/44ADA)” to see the single-instalment schedule. If you pay less by 15 March, 234C interest is 1% for one month on the shortfall.
Do salaried employees need to pay advance tax?
Usually not, because the employer deducts TDS on salary every month. You need it only if other income (FD interest, rent, capital gains, freelance work) pushes the tax not covered by TDS to ₹10,000 or more. You can also give these details to your employer so that more TDS is deducted instead.
How do I pay advance tax online?
Go to e-Pay Tax on the e-filing portal at incometax.gov.in (with or without logging in). Pick “Income-tax Act, 2025” for Tax Year 2026-27, or “Income-tax Act, 1961” for AY 2026-27 and earlier years. Choose the income tax tile, the year and the payment type “Advance Tax”. Pay by net banking, UPI, debit card or at a bank counter, and save the challan to claim the credit in your return.
Is this calculator accurate for the new Income-tax Act, 2025?
From 1 April 2026 the Income-tax Act, 2025 renamed sections. Section 234B became section 424 and section 234C became section 425, with the same 1% rates, cushions and due dates. This tool follows those rules. It gives an estimate, not tax advice, so check your AIS and Form 26AS before you pay.
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