Income Tax Due Date Calculator

Track time remaining to an income-tax filing deadline you enter. Enter your own values below to see time since entered due date and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Calendar-day difference between the reference date and the applicable deadline you enter.

Before you use the result

  • The sample date is not a determination of your filing deadline. Audit status, filing type and CBDT extensions can change due dates; verify at https://www.incometax.gov.in .

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What is Income Tax Due Date Calculator?

Income Tax Due Date Calculator helps you track time remaining to an income-tax filing deadline you enter.

The main result is time since entered due date, with a breakdown of entered filing deadline. The formula, example and assumptions below explain how to interpret it.

How to use Income Tax Due Date Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather applicable income-tax due date and reference date. Use values from the same situation or reporting period.
  2. Replace the example applicable income-tax due date with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read time since entered due date with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Select the applicable income-tax due date as a calendar date. The example uses 2026-07-31.
  • Select the reference date as a calendar date. The example uses 2026-09-14.

Income Tax Due Date Calculator: a worked example

With the inputs below, the result is 45 days (time since entered due date). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Applicable income-tax due date2026-07-31
Reference date2026-09-14
Time since entered due date45 days
Entered filing deadline2026-07-31

Understanding the Income Tax Due Date result

Read time since entered due date alongside entered filing deadline. These describe different parts of the same calculation.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

  • Example Entered filing deadline: 2026-07-31

Income Tax Due Date Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • The sample date is not a determination of your filing deadline. Audit status, filing type and CBDT extensions can change due dates; verify at https://www.incometax.gov.in .
  • Check whether endpoints are included and which weekend or holiday settings apply. An entered deadline is not a live notification from an authority.

For wider guidance, visit Government of India calendar. The formula and scope of this specific tool are stated on this page.

Income Tax Due Date Calculator FAQs

What does Income Tax Due Date Calculator calculate?

Income Tax Due Date Calculator helps you track time remaining to an income-tax filing deadline you enter. Its main output is time since entered due date in days.

What inputs do I need for Income Tax Due Date Calculator?

You need applicable income-tax due date and reference date. Use the field labels and units to match your figures to the formula.

Which formula does Income Tax Due Date Calculator use?

Calendar-day difference between the reference date and the applicable deadline you enter.

What is a worked example for Income Tax Due Date Calculator?

Example inputs: Applicable income-tax due date: 2026-07-31; Reference date: 2026-09-14. The result is 45 days (time since entered due date).

How should I enter applicable income-tax due date?

Select the applicable income-tax due date as a calendar date. The example uses 2026-07-31.

How do I choose reference date?

Select the reference date as a calendar date. The example uses 2026-09-14. The example uses 2026-09-14; replace it if your circumstances differ.

How should I read time since entered due date?

Read time since entered due date alongside entered filing deadline. These describe different parts of the same calculation.

Why might my Income Tax Due Date Calculator result differ from my records?

The sample date is not a determination of your filing deadline. Audit status, filing type and CBDT extensions can change due dates; verify at https://www.incometax.gov.in . Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Income Tax Due Date Calculator?

Yes. Note your first time since entered due date, change applicable income-tax due date or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Income Tax Due Date Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.