Section 234C: Interest for Deferment of Advance Tax
Understand when instalment-wise advance-tax interest is charged, the statutory due dates, calculation method, exceptions and the transition from Section 234C of the Income-tax Act, 1961 to Section 425 of the Income-tax Act, 2025.
What is interest under Section 234C?
Section 234C imposes interest when a person liable to pay advance tax does not pay the required cumulative amount by the prescribed instalment dates. The corresponding rule is now in Section 425 of the Income-tax Act, 2025. The provision concerns timing of advance-tax instalments, rather than merely the final amount outstanding at year-end.
Under the earlier Act, Section 208 provided for advance-tax liability and Section 234C prescribed interest for deferment. Under the new Act, Section 404 addresses advance-tax liability and Section 425 governs instalment shortfalls. Advance tax is generally payable when the estimated tax liability reaches Rs. 10,000 or more, subject to statutory exclusions and adjustments.
Advance tax due dates and interest
| Due date | Cumulative advance tax due | Interest on shortfall |
|---|---|---|
| 15 June | 15% | 3% (1% per month for 3 months) |
| 15 September | 45% | 3% (1% per month for 3 months) |
| 15 December | 75% | 3% (1% per month for 3 months) |
| 15 March | 100% | 1% (for 1 month) |
The percentages refer to the cumulative share of tax due on returned income, after permissible reductions. For the June and September instalments, no interest is charged if the cumulative payment is at least 12% and 36%, respectively, even though the normal instalment targets are 15% and 45%.
How is Section 234C interest calculated?
For each due date, calculate the required cumulative tax, subtract the advance tax actually paid by that date, and apply the statutory interest percentage to the positive shortfall. A shortfall in one instalment does not automatically disappear for that instalment merely because a later instalment is paid.
Illustrative example
Assume tax due on returned income is Rs. 100,000 and no advance tax is paid until a payment of Rs. 100,000 on 15 March. The illustrative instalment-wise interest is:
| Instalment | Shortfall | Interest |
|---|---|---|
| 15 June | Rs. 15,000 | Rs. 450 |
| 15 September | Rs. 45,000 | Rs. 1,350 |
| 15 December | Rs. 75,000 | Rs. 2,250 |
| 15 March | Nil | Nil |
| Total illustrative interest | Rs. 4,050 | |
This is a simplified illustration. Actual interest depends on the correct tax base, eligible credits, payment dates, applicable exceptions and the taxpayer's circumstances.
When can interest be avoided?
Section 425 provides relief for qualifying shortfalls arising from underestimation or failure to estimate specified categories of income, including capital gains, certain special-category income, first-time business or professional income, and qualifying dividend income, provided the tax attributable to that income is paid in full in the remaining advance-tax instalments or, where no instalments remain, by 31 March. The precise statutory conditions must be met.
Under the 1961 Act, the analogous provisos to Section 234C also dealt with capital gains, specified winnings, first-time business income and certain dividend-related income. Historical provisions concerning surcharge changes in 2000-01 were transitional and are not current general exemptions.
Special rule for presumptive taxation
Eligible taxpayers declaring presumptive income under the specified schemes do not follow the four-instalment schedule. They must generally discharge the entire advance-tax liability by 15 March. Under the 1961 Act this included eligible cases under Sections 44AD and 44ADA; under the 2025 Act, see Sections 58 and 408(2), read with Section 425(3).
Section 234C of 1961 Act and Section 425 of 2025 Act
The Income-tax Act, 2025 came into force on 1 April 2026. The official section mapping identifies Section 425 as the successor to Section 234C. The underlying instalment dates and broad interest structure continue, but taxpayers should use the statutory text applicable to the relevant tax year.
The Income Tax Department clarifies that a default in paying advance tax for FY 2025-26 remains governed by the 1961 Act, even if interest is determined after 1 April 2026. Advance-tax obligations for tax year 2026-27 arise under the 2025 Act.
Section 234C compared with Sections 234A and 234B
| Provision | Type of default |
|---|---|
| Section 234A | Delay in furnishing an income-tax return |
| Section 234B | Failure to pay adequate advance tax overall |
| Section 234C | Shortfall or deferment of individual advance-tax instalments |
Frequently asked questions
What is Section 234C interest?
Interest charged for a shortfall in advance-tax instalments. The general instalment rates are effectively 3% on the June, September and December shortfalls and 1% on the March shortfall.
Is Section 234C the same as Section 234B?
No. Section 234C concerns instalment-wise deferment during the year; Section 234B generally concerns failure to pay sufficient total advance tax.
Do presumptive taxpayers pay four instalments?
Eligible taxpayers under the specified presumptive schemes generally pay 100% of advance tax by 15 March instead of four instalments.
Does the 2025 Act change the instalment dates?
No. Section 425 of the Income-tax Act, 2025 retains the 15 June, 15 September, 15 December and 15 March schedule for the general category.
Official statutory sources
- Income Tax Department: Section 234C, Income-tax Act, 1961
- Income Tax Department: Income-tax Act, 2025 (Section 425)
- Official section mapping: 1961 Act to 2025 Act
- Income Tax Department: Tax payment and transition FAQs
Information is general in nature. Consult the applicable statute and official guidance for the relevant tax year and specific facts.