Income tax is not always fully covered by TDS or advance tax. You may earn interest, capital gains, rental income, or freelance income during the year that changes your final tax liability.
If the tax already paid is lower than the amount actually payable, the difference has to be settled through self-assessment tax before filing the ITR.
Here is how to calculate and pay it before filing the Income Tax Return (ITR).
Key Takeaways
- Self-assessment tax is the remaining tax payable after adjusting taxes already paid against the final liability.
- TDS, TCS, and advance tax can reduce the amount of self-assessment tax payable.
- Income from capital gains, interest, rent, or freelance work can create an additional tax liability.
- There is generally no separate fixed due date for self-assessment tax, but it should be paid before submitting the ITR.
- The tax payment should be linked to the correct assessment year or tax year to ensure the credit is reflected correctly.
What is Self-Assessment Tax?
Self-assessment tax is the tax an individual pays on the remaining income tax liability after considering taxes already paid during the year. These payments can include TDS, TCS, and advance tax.
For example, suppose the total tax liability for the year is ₹1,00,000. If ₹70,000 has already been deducted as TDS and ₹20,000 has been paid as advance tax, ₹10,000 remains payable. This ₹10,000 is the self-assessment tax.
The calculation is made after considering the taxpayer's total taxable income, eligible deductions, applicable tax rates, and taxes already paid.
The Income Tax Department states that after entering TDS and advance tax details in the ITR, the system determines whether any further tax is payable.
Self-assessment tax is a final adjustment before filing the return. It helps ensure that the tax liability is fully settled instead of leaving an unpaid amount in the ITR.
Who Needs to Pay Self-Assessment Tax?
A taxpayer needs to pay self-assessment tax when the final tax liability is higher than the TDS, TCS, and advance tax already paid. This can happen when:
- TDS was deducted at a lower rate than the actual tax liability.
- Income from interest, rent, or freelance work was not considered while paying advance tax.
- Capital gains were earned during the year.
- Additional taxable income was received after the last advance tax payment.
- The final tax calculation shows an amount still payable after adjusting available tax credits.
Salaried taxpayers can also have self-assessment tax liability. TDS deducted by an employer may cover tax on salary, but income from investments, rent, or other sources can increase the final liability.
How is Self-Assessment Tax Calculated?
The basic calculation starts with the total tax liability and then adjusts taxes and eligible credits already available.
Formula:
Self-assessment tax = Total tax liability + applicable interest - tax relief - MAT credit - TDS - TCS - advance tax
Here is what each component means:
- Total tax liability: Tax calculated on the taxable income using the applicable tax rates.
- Applicable interest: Interest payable under relevant provisions, where applicable.
- Tax relief: Relief available under applicable provisions for eligible taxpayers.
- MAT credit: Minimum Alternate Tax credit, where applicable.
- TDS: Tax already deducted at source during the year.
- TCS: Tax already collected at source, where applicable.
- Advance tax: Tax paid by the taxpayer during the financial year.
Example of Self-Assessment Tax Calculation
Assume a taxpayer has the following figures:
- Total tax liability = ₹1,50,000
- TDS = ₹90,000
- TCS = ₹5,000
- Advance tax = ₹40,000
- Eligible tax relief = ₹5,000
- Applicable interest = ₹2,000
The calculation will be:
Self-assessment tax = ₹1,50,000 + ₹2,000 - ₹5,000 - ₹90,000 - ₹5,000 - ₹40,000
Self-assessment tax = ₹12,000
The taxpayer has ₹12,000 to pay as self-assessment tax before filing the ITR.
Interest can arise in certain circumstances. For example, Section 234A relates to interest for late filing, while Sections 234B and 234C can apply to certain shortfalls or delays in advance tax payments.
When Should You Pay Self-Assessment Tax?
Self-assessment tax is generally paid after the financial year ends, when the final tax liability can be calculated. It should be paid before filing the ITR if an amount remains payable.
Unlike advance tax, self-assessment tax does not follow quarterly instalment dates. Advance tax is paid during the financial year based on estimated tax liability. Self-assessment tax is calculated later using the actual income and tax already paid.
For payments relating to Assessment Year 2026-27, the Income Tax Department has clarified that the Income Tax Act, 1961 applies.
For Tax Year 2026-27 and later, the Income Tax Act, 2025 applies. Selecting the correct year while making a payment is important because it determines where the tax credit is recorded.
How to Pay Self-Assessment Tax Online?
You can pay the tax online by using the Income Tax e-Filing portal.
Step 1: Log in to the Income Tax e-Filing Portal
Go to the official Income Tax e-Filing website and log in with the necessary credentials.
Step 2: Open e-Pay Tax
In the tax payment section, choose the option for making a new payment.
Step 3: Select the Relevant Tax
Select the income tax payment option that applies and then continue.
Step 4: Select the Correct Year
Indicate the appropriate assessment year or tax year corresponding to the period for which the tax is being paid.
Step 5: Choose Self-Assessment Tax
Choose the correct payment type for your self-assessment tax and enter the amount required.
Step 6: Make the Payment
Choose an available method of payment, finish the transaction, and keep the challan or the payment receipt for future reference.
The Income Tax Department states that the tax payment should be included in the return before it is submitted.
If the payment is not shown in the preliminary figures, it may be necessary to enter the payment details manually after waiting for the transaction to appear.
Note on Reflection Time and Immediate Filing: After paying via e-Pay Tax, the payment may take up to 48 hours to reflect automatically in your pre-filled ITR draft. If you are filing your return immediately without waiting:
- Keep your Challan Identification Number (CIN), BSR code, challan serial number, and payment date handy from the receipt.
- Manually enter these challan details into the self-assessment tax schedule of your ITR form before submitting it to ensure the tax department recognizes the payment.
What's the Difference Between Self-Assessment Tax and Advance Tax?
|
Factor |
Self-Assessment Tax |
Advance Tax |
|
Purpose |
Settles the remaining tax liability |
Pays tax in advance during the year |
|
Calculation |
Based on actual income and tax already paid |
Based on estimated tax liability |
|
Timing |
Generally after the financial year ends |
During the financial year |
|
Adjustment |
TDS, TCS and advance tax are adjusted |
Later adjusted against final tax liability |
|
Payment |
Before filing the ITR when tax remains payable |
Paid through prescribed instalments |
Advance tax is usually imposed when the amount of tax estimated is ₹10,000 or more, provided that the relevant rules and exceptions apply.
What Happens if Self-Assessment Tax is Not Paid?
The taxpayer could be liable for interest and other consequences under the relevant income tax provisions if the tax remains payable but is not paid before the return is filed.
An unpaid balance may also cause a discrepancy between the tax stated in the ITR and the tax actually paid. If the amount due is paid and the payment challan is kept, this will ensure that there is a clear record of the tax settlement.
The precise interest or any other effect will depend on the circumstances, such as the type of the tax shortfall and when it occurs.
Risk of a Defective Return
Filing an ITR with an unpaid tax balance (where tax payable is shown as due or mismatched) can cause the Centralized Processing Centre (CPC) of the Income Tax Department to treat your return as incomplete or incorrect. This can lead to your return being declared defective under Section 139(9), giving you a limited window to correct the discrepancy and pay the balance, failing which your return may be treated as invalid.
Conclusion
Self-assessment tax is the last tax adjustment carried out before filing the ITR in the case where the amount of tax deducted at source, tax collected at source, and advance tax do not altogether meet the total tax liability.
It is calculated by beginning with the actual taxable income and then taking into consideration the applicable deductions, the tax rates, the tax that has already been paid, and the eligible credits.
It is helpful to check the final tax position before you file the ITR in order to pick up any amount that is due. When making the payment, the right assessment year or tax year should be chosen so that the tax credit can be correctly recorded.
