Advance Tax Due Dates and Interest Under 234B and 234C

Who needs to pay advance tax?

Advance tax means paying income tax during the financial year instead of waiting until you file the return. Under the FY 2025-26 rules, it generally applies when estimated tax payable after eligible TDS, TCS and other relevant adjustments is ₹10,000 or more. Freelancers, business owners, landlords and investors commonly need to check it. Salaried employees can also owe advance tax when payroll deductions do not cover their total taxable income.

This article uses the Income-tax Act, 1961 framework for FY 2025-26 and AY 2026-27. The Income-tax Act, 2025 is scheduled to take effect from 1 April 2026; check current section numbers and official payment instructions before acting. The financial year to which income belongs remains important even if you calculate interest later. A payment labelled for the wrong assessment year may not settle the liability you intended to discharge.

What are the advance tax due dates for FY 2025-26?

For taxpayers following the regular instalment schedule, the cumulative targets are at least 15% by 15 June 2025, 45% by 15 September 2025, 75% by 15 December 2025 and 100% by 15 March 2026. These percentages are cumulative, not additional percentages payable each quarter. Check the official portal for any specific extension or relief rather than assuming that an income tax return deadline extension also changes advance tax dates.

If your estimated annual advance tax is ₹1,00,000, the cumulative payment targets are ₹15,000, ₹45,000, ₹75,000 and ₹1,00,000. After paying ₹15,000 in June, you would ordinarily add ₹30,000 in September, not another ₹45,000. Recalculate when income changes. Tax paid by 31 March can still be treated as advance tax for that year, but paying after 15 March does not automatically remove interest for missing the March instalment deadline.

Need help with this? Read our guide to Income Tax Return Filing (ITR Filing) Online.

How do you calculate the amount to pay?

Estimate income from every relevant source, including salary, business profits, rent, interest, dividends and taxable gains. Apply the appropriate regime, deductions, special tax rates, surcharge where applicable and health and education cess. Then account for eligible tax credits and tax deducted or collected at source. The remaining annual liability is the starting point for instalment planning. Do not estimate tax merely by applying your highest slab rate to every rupee received.

Suppose your estimated total tax, including cess, is ₹1,80,000 and expected eligible TDS is ₹1,20,000. Your estimated advance tax is ₹60,000. The regular cumulative targets become ₹9,000, ₹27,000, ₹45,000 and ₹60,000. If bank interest or business profit rises later, update the annual estimate and subtract advance tax already paid. Keep the calculation because a bank debit proves payment, but does not explain why the amount was sufficient for a particular instalment.

How does section 234C interest work?

Section 234C addresses deferment of advance tax instalments. Under the regular schedule, interest is generally 1% per month for three months on the relevant June, September and December shortfalls, and for one month on the March shortfall. The calculation uses the statutory tax-due measure based on returned income, with applicable reductions. It is not simply interest on gross income, turnover or the amount of tax that an employer happened to deduct.

For illustration, assume the relevant annual advance tax requirement is ₹1,00,000 and nothing was paid by 15 December. The December target is ₹75,000, so that instalment’s interest is ordinarily ₹75,000 × 1% × 3, or ₹2,250. Earlier instalments may create additional interest. For June and September, limited tolerance applies when payments reach 12% and 36% respectively; falling below those levels can trigger calculation against the 15% and 45% targets.

How does section 234B interest differ?

Section 234B concerns an overall failure to pay sufficient advance tax. It generally applies when advance tax paid is less than 90% of assessed tax, using the statutory definition and reductions. Interest ordinarily runs at 1% for every month or part of a month from 1 April of the assessment year until the relevant payment or determination. Paying the March instalment late can therefore have consequences beyond the instalment-interest calculation.

Assume assessed tax after the relevant credits is ₹1,00,000 and advance tax paid is ₹80,000. The payment is below the 90% threshold, and the initial shortfall is ₹20,000. If the entire shortfall is paid on 20 July, a simplified calculation covering April through July is ₹20,000 × 1% × 4, or ₹800. Actual computations must account for payment dates, interest allocation, statutory rounding and any later changes to assessed tax.

Can 234B and 234C both apply?

Yes. The provisions address different defaults: section 234C examines whether instalments arrived on time, while section 234B examines whether enough advance tax was paid overall. You can pay the full annual amount by March and still owe instalment interest for earlier delays. Conversely, a taxpayer who repeatedly underestimates income may face both kinds of interest. Neither should be confused with section 234A, which concerns delay in furnishing the return.

Suppose you owe ₹1,00,000 and pay the entire amount on 15 March after making no earlier payments. You may avoid section 234B because sufficient advance tax was paid during the year, but earlier instalment shortfalls can still attract section 234C. If you instead pay only ₹70,000 by year-end, both provisions may become relevant. Use the official return computation or a checked calculation rather than assuming one interest charge replaces the other.

What relief applies to senior citizens and unexpected income?

A resident individual aged 60 or more during the financial year is generally not liable to advance tax if they have no income chargeable under profits and gains of business or profession. This exemption does not cover every older taxpayer automatically: residence and the nature of income matter. A retired person with only pension and interest may qualify, while someone running a consultancy or business must examine the position separately.

Section 234C also contains targeted relief for specified income that can be difficult to estimate, including certain capital gains, lottery-type income, first-time business or professional income and qualifying dividend income. Conditions apply, including payment of the related tax through the remaining instalments or by 31 March when no instalment remains. This is not a blanket exemption from tax or section 234B. Record the receipt date and check the precise statutory category before relying on relief.

What changes for presumptive taxpayers?

Taxpayers using the eligible presumptive schemes under sections 44AD or 44ADA generally pay their entire advance tax by 15 March rather than following four regular instalments. As of FY 2025-26, this concession should not be treated as a universal rule for everyone who uses the word presumptive. Confirm the applicable provision, eligibility and income treatment. Other presumptive provisions do not automatically receive the same instalment arrangement merely because profit is estimated.

For example, an eligible professional using section 44ADA with annual advance tax of ₹80,000 would generally aim to pay the full ₹80,000 by 15 March. A shortfall can attract section 234C interest for the March obligation, and insufficient annual payment can also raise section 234B issues. Keep turnover or receipt records, TDS details and the presumptive computation together. The simplified profit method does not remove the need to identify other income or pay tax correctly.

How do you pay advance tax and fix mistakes?

Use the official income tax portal’s payment facility and select the correct PAN, assessment year and advance tax payment category. Review the payment preview before authorising the transaction. Save the challan receipt and bank confirmation, then check that the payment appears in your tax records. A pending transaction is not necessarily a completed payment. Avoid making a second payment immediately without checking status, particularly when the bank account has already been debited.

If you selected the wrong year or payment details, investigate the official challan correction facility and its conditions promptly. Do not conceal the error by claiming a payment against an unrelated year. Before filing, reconcile every challan and calculate any remaining self-assessment tax and interest. Paying interest voluntarily through the correct process is usually more useful than waiting for a processing demand, but verify the computation so that you do not pay twice.