Millions of Indian taxpayers who missed the 15 March advance tax deadline still have a narrow window to limit extra costs. With interest now running under Sections 234B and 234C of the Income Tax Act, experts say swift action can reduce the hit and prevent a larger outflow in April.
The issue matters for anyone whose net tax liability for the year is at least Rs 10,000 after tax deducted at source. Those who fell short on the final installment are now facing interest for deferment and, in some cases, for default. The fastest way to cut losses is to pay the shortfall right away.
“Taxpayers who missed the 15 March advance tax deadline can still make the payment. However, delays incur interest under Sections 234B and 234C. Here’s what they should do now.”
What Advance Tax Requires
Advance tax is paid in four parts during the financial year: 15 percent by 15 June, 45 percent by 15 September, 75 percent by 15 December, and 100 percent by 15 March. The rule generally applies to salaried, self-employed, and retirees if their final tax due is Rs 10,000 or more after TDS or TCS.
Those who pay at least 90 percent of their final tax by 31 March can usually avoid interest under Section 234B. Missing the 15 March mark, however, triggers Section 234C interest for shortfall in the last installment. Paying the balance before 31 March still helps limit later interest.
How Interest Adds Up
Section 234C deals with late or short installments within the financial year. Interest is typically 1 percent per month for three months on the first three installments, and 1 percent for one month on the final March installment. It applies to the amount short of each required milestone.
Section 234B applies if total advance tax paid is under 90 percent of the final tax. Interest is 1 percent per month from 1 April of the assessment year until the date of payment of the balance. Paying the shortfall before 31 March can prevent this interest from starting.
There are limited exceptions under Section 234C for incomes like capital gains and certain winnings, if the related tax is paid by 31 March. Most other income types still face the regular schedule.
What Taxpayers Should Do Now
- Estimate total income for the year and compute final tax after TDS/TCS and reliefs.
- Calculate interest under Sections 234C and, if under 90 percent, potential 234B from 1 April.
- Pay the shortfall as advance tax right away via Challan ITNS 280 on the income tax portal or authorized banks.
- Save the challan and reconcile it in the Annual Information Statement and Form 26AS.
- Reflect the payment and interest in the income tax return when filing.
Tax professionals advise checking employer TDS, housing loan interest certificates, and Section 80C to 80G deductions to avoid overpaying. A careful review can lower the tax base and, in turn, reduce interest.
Why Acting Before 31 March Matters
For many, the difference between paying on 25 March and 5 April is not just a few days of cash flow. It can decide whether Section 234B applies at all. Hitting at least 90 percent of the final liability before the financial year ends helps avoid default interest from 1 April, though Section 234C on the March installment still applies.
Those who wait until April will pay the balance as self-assessment tax and face interest under Section 234B until the payment date. If a refund later arises due to higher TDS credits or reliefs, the system adjusts it, but cash tied up as interest is not easily recovered.
Outlook and Key Reminders
The tax department has tightened data matching through AIS and Form 26AS. Gaps in advance tax often surface quickly when returns are processed. Timely correction reduces the chance of notices and curbs interest growth.
Looking ahead, taxpayers with uneven income—consultants, freelancers, and traders—may benefit from quarterly reviews aligned with the installment dates. Building a buffer for March helps avoid last-minute misses caused by bonuses, capital gains, or one-off receipts.
For now, the guidance is clear: pay the shortfall without delay, compute interest accurately, and document everything. Acting before 31 March can prevent Section 234B from starting and contain Section 234C costs. After that date, interest compounds monthly, and the bill only grows. As filing season nears, careful reporting and reconciliation will be the next test for those catching up.
