Millions of Indian taxpayers who missed the March 15, deadline for withholding tax still have a narrow window to limit additional costs. With interest now in force under sections 234B and 234C of the Income Tax Act, experts say quick action can reduce the shock and prevent a larger capital outflow in April.
The question is important for anyone whose net tax liability for the year is at least Rs 10,000 after tax deducted at source. Those who have not paid the final installment are now being charged interest for suspension and, in some cases, default. The quickest way to reduce losses is to pay the deficit immediately.
“Taxpayers who missed the March 15 advance tax deadline can still make the payment. However, delays attract interest under sections 234B and 234C. Here’s what they need to do now.”
What the withholding tax requires
Withholding tax is paid in four parts during the financial year: 15 percent before June 15, 45 percent before September 15, 75 percent before December 15 and 100 percent before March 15. The rule generally applies to salaried, self-employed and pensioners 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 March 31 can generally avoid interest under Section 234B. However, missing the March 15 date triggers Interest under section 234C for loss of earnings during the last payment. Paying the balance before March 31 still allows you to limit subsequent interest.
How Interest Adds Up
Section 234C deals with late or short payments during the financial year. Interest is generally 1% per month for three months on the first three payments and 1% for one month on the last payment in March. It applies to the lower amount at each required step.
Section 234B applies if the total withholding tax paid is less than 90 percent of the final tax. Interest is 1 percent per month from April 1 of the tax year until the balance payment date. Paying the deficit before March 31 may prevent this interest from starting.
There are limited exceptions under section 234C for income such as capital gains and certain gains, if the relevant tax is paid before 31 March. Most other types of income still face the regular schedule.
What taxpayers should do now
- Estimate the total income for the year and calculate the final tax after TDS/TCS and reliefs.
- Calculate interest under sections 234C and, if less than 90%, potential 234B from April 1.
- Pay the shortfall immediately as advance tax through Challan ITNS 280 on the Income Tax portal or authorized banks.
- Register the challan and reconcile it in the annual information return and Form 26AS.
- Report the payment and interest on the tax return when filing.
Tax experts advise checking employer’s TDS, home loan interest certificates and section 80C to 80G deductions to avoid overpaying. Careful consideration can reduce the tax basis and, therefore, reduce interest.
Why acting before March 31 is important
For many, the difference between paying on March 25 and April 5 isn’t just a few days of cash flow. It can decide whether section 234B applies or not. Reaching at least 90 percent of the final debt before the end of the financial year allows for the avoidance of default interest from April 1, although section 234C on the March payment still applies.
Those who wait until April will pay the balance as self-assessment tax and will have to pay interest under section 234B until the payment date. If a refund arises later due to higher TDS credits or reliefs, the system adjusts it, but the cash tied up in the form of interest is not easily recovered.
Outlook and key reminders
The tax department has strengthened data matching through AIS and Form 26AS. Gaps in withholding tax often become apparent quickly during declaration processing. Rapid correction reduces the risk of notifications and slows interest growth.
In the future, taxpayers with unequal income (consultants, freelancers and traders) could benefit from quarterly reviews aligned with payment dates. Building a reserve for March helps avoid last-minute hiccups caused by bonuses, capital gains or one-off revenue.
For now, the instructions are clear: pay the deficit without delay, calculate interest accurately and document everything. Acting before March 31 can prevent Section 234B from starting and contain Section 234C costs. After this date, interest accumulates monthly and the bill only increases. As filing season approaches, careful reporting and reconciliation will be the next test for those playing catch-up.
