TDS Interest Calculator

Archived historical, non-current snapshot — dated July 9, 2026 (2026-07-09). The 1% and 1.5% monthly rates, modeled due dates, and Section 234E fee rules described below may not reflect current Indian TDS provisions. Check authoritative sources for the applicable period before relying on this estimate.

The TDS interest calculator estimates charges for three common Indian Tax Deducted at Source delays: late deduction, late payment after deduction, and late TDS return filing. Choose the scenario, enter the TDS amount and relevant dates, and the result includes the interest or fee with the main assumptions shown in the results. The calculator uses rupees, so outputs are shown in ₹ and rounded to whole rupees.

TDS is a withholding system. Instead of waiting for the recipient to pay tax later, the payer deducts tax at source and deposits it with the government. This calculator focuses on the deductor’s timing cost when the deduction, deposit, or return filing is delayed. For cash planning around the amount due, you can compare the result with the interest calculator, budget calculator, and income tax calculator for Pakistan if you are comparing regional tax withholding concepts.

How to use

Select what you want to estimate. For interest on late deduction, enter the transaction date and the actual deduction date. The calculator counts every calendar month touched between those dates. For interest on late payment, enter the date of TDS deduction and the date of TDS payment. The calculator calculates a modeled due date: March deductions are due on April 30, while other months use the seventh day of the following month. If payment is not late, the charge is zero. For fee for late return filing, enter the quarter, filing year, and actual filing date.

This is an educational estimate, not a tax filing system. TDS rules vary by deductor type, nature of payment, form, assessment year, challan status, and official updates. Use the result to understand the arithmetic, then confirm the amount on the Income Tax Department portal, TRACES utilities, challan records, or a qualified tax professional before paying.

How it works

For late deduction, the model applies 1% for every month or part of a month touched between the date tax was deductible and the actual deduction date. The helper function returns zero if the deduction date is not after the transaction date. Otherwise, it counts calendar months inclusively. That means April 30 to May 1 touches two months even though only one day elapsed.

For late payment, the model first calculates the statutory-style due date used in the calculator. If payment is on or before that date, the result is zero. If payment is late, it applies 1.5% per month or part month, counted from the deduction date to the payment date. That matches the way the current calculation is written; it does not count only from the due date.

For late return filing, the model finds a due date by quarter. Q1 is July 31 of the selected year, Q2 is October 31, Q3 is January 31 of the following year, and Q4 is May 31 of the following year. It then charges ₹200 per late day, capped at the TDS amount entered.

Formula

$\text{late deduction interest} = \text{TDS amount} \times 1\% \times \text{chargeable months}$

$\text{late payment interest} = \text{TDS amount} \times 1.5\% \times \text{chargeable months}$

$\text{late filing fee} = \min(\text{late days} \times \text{Rs 200}, \text{TDS amount})$

The key phrase is month or part of a month. This is not the same as simple daily interest. A short delay that crosses a month boundary may cost more than a longer delay within one month.

Checking the primary result

Late deduction. Suppose TDS of ₹10,000 should have been deducted on April 15, 2025, but was actually deducted on May 2, 2025. The helper function counts April and May, so the chargeable months are 2. The interest is:

$\text{interest} = \text{Rs 10,000} \times 1\% \times 2 = \text{Rs 200}$

The results therefore shows interest on late deduction of ₹200, months charged of 2, and a monthly rate of 1%.

Late payment. Suppose TDS of ₹10,000 was deducted on October 12, 2025 and paid on December 12, 2025. The modeled due date is November 7, 2025, so the payment is late. The calculator then counts October, November, and December as chargeable months, for 3 months. The interest is:

$\text{interest} = \text{Rs 10,000} \times 1.5\% \times 3 = \text{Rs 450}$

The results shows the due date, three months charged, and interest on late payment of ₹450.

Late filing. For Q1 of filing year 2025, the calculator uses July 31, 2025 as the TDS return due date. If the return is filed on September 19, 2025, the delay is 50 days. The uncapped fee is ₹10,000 because 50 multiplied by ₹200 equals ₹10,000. Since the TDS amount entered is also ₹10,000, the capped fee remains ₹10,000.

Tax and compliance notes

The calculator uses the most common educational interpretation of the interest rates shown in the calculator. Actual TDS compliance can involve more than these three rows. A deductor may need to correct challans, revise a TDS return, handle lower-deduction certificates, consider higher rates for missing PAN, or respond to a notice. The Income Tax Department portal and TRACES records are the authoritative places to verify challan matching and return status.

Rates and dates can change. Government notifications may extend due dates for specific periods, utilities may update form validation, and laws may be amended by a Finance Act. The calculator’s built-in due dates are a model; they should be checked against the current official calendar for the relevant financial year.

Common mistakes

• Counting only complete months instead of every month or part month touched.
• Entering the date of payment in the deduction date field.
• Forgetting that March deductions have a different modeled due date in this calculator.
• Assuming the Section 234E fee is unlimited when the calculator caps it at the TDS amount.
• Treating this estimate as a substitute for portal-generated demand or professional advice.
• Using net payment to the recipient instead of the TDS amount as the input.

Sources

• Income Tax Department, Government of India, e-Filing portal — official portal for tax filing, TDS workflows, and current compliance information.
• Reserve Bank of India, Frequently Asked Questions — official financial consumer information useful when TDS interest affects payment planning.