/ Free Tool · Advance Tax · Updated 2026-10-29

Advance Tax Calculator FY 2026-27: 15 December Instalment and Interest, what to pay by 15 December 2026.

By 15 December 2026, 75% of your FY 2026-27 tax (after TDS) should be paid as advance tax. Enter your estimate and what you have paid; the calculator shows the December shortfall and the interest under Sections 425 and 424 of the Income-tax Act, 2025 (earlier Sections 234C and 234B).

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Written by CA Durgesh Chavda

Chartered Accountant (ICAI) · Founder, Bharat Quantum Prospera · NRI taxation, US incorporation, transaction due diligence, forensic audit, AEO, cross-border tax · LinkedIn

/ Calculator

Check your 15 December payment.

Inputs

All amounts in INR.

Estimated tax for FY 2026-27, after TDS/TCS Your full-year tax liability minus tax already deducted at source.

Presumptive income (44AD/44ADA-type)? Presumptive taxpayers pay 100% by 15 March in one instalment.

Paid by 15 June 2026

Paid 16 June - 15 September 2026

Paid / planned 16 September - 15 December 2026

Planned 16 December 2026 - 15 March 2027

Months from 1 April 2027 until the balance is paid If less than 90% was paid by 31 March, interest runs monthly; e.g. 4 if you pay with a July return.

Estimated interest

INR 0

Cumulative due by 15 December (75%)INR 0

Shortfall at 15 DecemberINR 0

Interest for deferment (Sec. 425 / earlier 234C)INR 0

Interest for shortfall (Sec. 424 / earlier 234B)INR 0

/ The schedule

Cumulative instalments.

By	Cumulative	No interest if at least
15 June 2026	15%	12%
15 September 2026	45%	36%
15 December 2026	75%	75%
15 March 2027	100%	100%

Advance tax applies if tax after TDS is INR 10,000 or more; resident senior citizens without business income are exempt.
Interest for deferment: 1% a month on the shortfall, for three months for each of the first three instalments and one month for the last.
Interest for shortfall: 1% a month from 1 April 2027 if less than 90% was paid by 31 March 2027.
Interest is computed on amounts rounded down to the nearest INR 100.

/ What counts

Getting the estimate right.

Include capital gains, interest, rent and freelance or business income, not just salary.
Foreign income is taxable if you are resident and ordinarily resident; claim credit for foreign tax in the return.
Gains arising after an instalment date can be paid in the next instalment without deferment interest for that part.

Sources: India Briefing: advance tax under the Income-tax Act, 2025.

Last updated: 29 October 2026. Assumes the 2025 Act keeps the same rates and schedule as the 1961 Act's Sections 234B and 234C.

/ Ready when you are

Want a CA to check the numbers?

Email durgesh@bharatquantumprospera.com or WhatsApp +91 78018 87130. Fixed-scope quote within 48 hours.

Get a firm quote → WhatsApp Durgesh

FAQ

Common questions, answered.

When is the third advance tax instalment for FY 2026-27?

15 December 2026, by which 75% of the year's tax (after TDS) should be paid.

What is the interest for missing the 15 December instalment?

1% a month for three months on the shortfall against 75% of the tax, under Section 425 of the Income-tax Act, 2025 (earlier Section 234C).

Who has to pay advance tax?

Anyone whose tax after TDS is INR 10,000 or more, except resident senior citizens without business income.

When does Section 424 (earlier 234B) interest apply?

If less than 90% of the tax was paid as advance tax by 31 March, at 1% a month from 1 April until the balance is paid.

Can BQP compute and pay my advance tax?

Yes, including capital gains, foreign income and NRI cases. Email durgesh@bharatquantumprospera.com or WhatsApp +91 78018 87130. Fixed-scope quote within 48 hours.