First identify the tax year and the Act named in your order: a demand for an earlier assessment year can remain governed by the Income-tax Act, 1961, even if it is still unpaid after the Income-tax Act, 2025 took effect on 1 April 2026. For a demand under section 220(2) of the 1961 Act, calculate simple interest at 1% of the applicable unpaid amount for each month or part of a month after the notice’s payment period expires, through the payment date. Penalties are separate charges and do not share one blanket calculation.
Start with the tax year and the Act on your notice
Do not choose a calculation based only on when you received or paid the demand. Check the assessment year, tax year, order date and the statutory section cited in the order and demand notice. The Income Tax Department says the 2025 Act came into effect on 1 April 2026, while proceedings relating to earlier tax years continue under the repealed 1961 Act’s transition provisions. So an unpaid demand for AY 2022–23 does not become a 2025 Act demand simply because it remains outstanding after that date. See the Department’s New Act FAQs.
As an Amazon Associate I earn from qualifying purchases.
The post-demand interest provision discussed below is section 220(2) of the 1961 Act. The successor demand provision is section 411 of the 2025 Act; confirm the provision printed on your actual notice rather than applying the old-law formula automatically to a new-law demand. The Department’s Tax Payments FAQ also identifies the transition to the new Act.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11How to calculate section 220(2) interest
For a demand governed by section 220(2) of the Income-tax Act, 1961, the statutory rate is simple interest of 1% for every month or part of a month. The section and Department’s text are available at Section 220. Calculate the charge in this order:
#1 Best Overall
- Find the payment deadline. Read the demand notice and any later order allowing an extension or instalments. A section 156 demand notice usually allows 30 days, but the notice controls; a shorter period may be set with the required approval. The applicable notice rules are in the Income-tax Rules, 2026 notification.
- Establish the unpaid amount subject to interest. Start with the demand amount and account for payments and any later order that reduces or otherwise changes it. Reconcile the order’s figures with tax credits and challans before calculating.
- Count the chargeable months. The period starts on the day immediately after the permitted payment period expires and runs through the payment date. Count each month or part of a month; even a partial month counts under the statutory wording.
- Apply the rate to the relevant unpaid amount. For a single unchanged balance, use: unpaid amount × 1% × number of counted months or parts of months. The provision specifies simple interest, not interest compounded on earlier interest.
- Rework the calculation when the record changes. Payments and qualifying rectification, appeal, revision or other specified orders can change the amount on which interest is calculated. The Department’s Interest and Fees guidance discusses adjustments and possible refunds of excess interest.
Arithmetic example
If ₹10,000 remains unpaid for two counted months, the arithmetic is ₹10,000 × 1% × 2 = ₹200. This illustrates the formula only; it is not a Department calculator result or an estimate for a particular notice. The actual result depends on the notice period, payment date, any partial payments, changes made by later orders, and applicable rounding.
Keep demand interest, other interest and penalties separate
A demand can contain multiple charges, but they do not all accrue for the same reason or period. Sections 234A, 234B and 234C concern defaults connected with filing a return and paying advance tax; they may already appear in the assessment computation before the demand’s payment deadline. Do not count those amounts again as section 220(2) late-payment interest. The Department’s Interest and Fees page covers these interest provisions.
| Charge | What it relates to | How to review it |
|---|---|---|
| Section 220(2) interest under the 1961 Act | Late payment of a demand after its payment period expires | Check the notice deadline, unpaid balance, counted months or parts, payments and later orders. |
| Sections 234A, 234B or 234C interest | Return-filing or advance-tax timing defaults | Check the assessment computation and the relevant default; these are distinct from post-demand interest. |
| Penalty | A separate penalty provision and order, based on the facts and grounds stated there | Read the cited provision, penalty order, calculation base, rate, defenses and any appeal or immunity consequences. Do not apply one percentage to the entire demand without checking the law and order. |
There is a narrow transition rule for some penalty demands: the Finance Bill 2026 says that, for section 270A penalty demands arising from assessments or reassessments made on or after 1 April 2027, section 220(2) interest does not run up to the specified Commissioner of Income-tax (Appeals) order date, or, for the described cases involving the Dispute Resolution Panel, the specified Income Tax Appellate Tribunal order date. This is not a general exemption for every penalty demand. Check the exact wording and conditions in the Finance Bill 2026 and the dates and facts of the case.
Check the demand before paying or disputing it
Use the Income Tax Department e-Filing portal to compare the demand with the underlying order, your credits and your payment records. The Department’s Response to Outstanding Demand guidance describes the response options.
- Sign in to the e-Filing portal and open Pending Actions → Response to Outstanding Demand.
- Match the demand reference number and assessment year against the order and notice. Check their dates and compare the tax, interest and penalty breakup with TDS, advance-tax and self-assessment-tax credits and payment challans.
- If you agree with the demand, use its Pay Now route where available. The Department lists online payment, NEFT/RTGS and counter payment options in its Tax Payments FAQ. Keep the challan or receipt.
- If you partly disagree, submit a partial-disagreement response and pay the portion you do not dispute. The Department specifically says to pay the undisputed portion.
- If you fully disagree, select the full-disagreement route and provide the reason and requested details. Submitting a response is not a substitute for checking or, where appropriate, pursuing the relevant remedy.
If you cannot pay by the stated deadline, you may apply to the Assessing Officer for an extension or instalments before that deadline. Under the 1961 Act, the officer has discretion to allow them on application; do not assume a request has changed the due date unless an order says so. The Department also describes possible reduction or waiver under section 220(2A), subject to its statutory tests and authority process; it is not automatic. See Section 220 and Interest and Fees.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When an individual calculation needs professional review
A reliable total cannot be established from the rate alone. It requires the actual demand notice, assessment or other order, payment history, credits, any extension or instalment order, and subsequent rectification or appeal orders. For a substantial penalty or a disputed assessment for an earlier year, consider asking a qualified Indian tax professional to review the order and procedural dates.
Quick Recap
Best Value
- Federal India: Emerging economic issues
- Product type: ABIS BOOK
- Brand: Indian Tax Institute
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
