How to Use This Calculator

If your income tax refund took longer than expected, you may be owed more than just the principal amount. The department is legally required to compensate you for its own delay — yet few taxpayers ever check whether that compensation was paid correctly. This calculator and guide help you verify both: whether your refund qualifies for interest, and roughly how much it should be.

Complete Guide: What Is Section 244A

Section 244A of the Income Tax Act, 1961 entitles a taxpayer to simple interest on a delayed refund, at 0.5% per month (6% per annum), whenever the delay is caused by the department rather than the taxpayer. This applies regardless of whether the excess tax was paid through TDS, TCS, advance tax, or self-assessment tax.

For returns filed on or before the due date, the interest clock starts on 1 April of the relevant assessment year and runs until the date the refund is actually credited. For belated returns, the clock starts only from the date of filing. If any part of the delay is genuinely attributable to the taxpayer — an incorrect bank account, an unanswered notice, or incomplete disclosures — that portion of the period is excluded from the calculation, and only the department-caused period earns interest.

The Interest Formula

The calculation itself is simple once eligibility is confirmed, but eligibility is where most people go wrong. Two conditions must both be met before any interest is payable:

If both conditions pass, the interest itself is calculated as:

Worked Examples

Example 1 — Interest Applies. Refund of ₹24,000, total tax payable ₹1,80,000, filed on time, credited five months after 1 April 2026. Since ₹24,000 is above 10% of ₹1,80,000 (₹18,000), the refund is eligible. Interest = ₹24,000 × 0.5% × 5 = ₹600. Total credited: ₹24,600.

Example 2 — No Interest. Refund of ₹8,000, total tax payable ₹1,50,000, delayed by four months. Since ₹8,000 falls below 10% of ₹1,50,000 (₹15,000), the eligibility check fails and no interest is payable — regardless of the delay length.

Benefits of Checking Your Refund Interest

• Catches under-paid interest. CPC's automated figure can carry the same TDS-mismatch errors that caused the delay.
• Sets realistic expectations. Avoids confusion when an intimation shows ₹0 interest on a genuinely delayed refund.
• Supports a grievance. A documented expected amount strengthens any complaint over a missing credit.
• Helps next year's return. Interest received is taxable — knowing the figure early makes filing smoother.

Common Mistakes to Avoid

• Assuming every delay earns interest. The 10% threshold rule disqualifies many smaller refunds.
• Using the wrong start date. On-time filers count from 1 April of the assessment year, not the filing date.
• Forgetting the ₹100 minimum. Short delays on small refunds often round down to zero interest.
• Not declaring interest received. It's taxable and must be reported the following year.

Conclusion

Section 244A ensures a delayed refund doesn't cost you extra — but the eligibility rules mean interest isn't automatic for every case. Running your numbers through this calculator takes under a minute and gives you a figure to compare against whatever CPC actually credits.

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