Self-Assessment Tax

What is Self-Assessment Tax?#

Self-Assessment Tax (SAT) is the tax that you calculate and pay yourself after the financial year ends, before or at the time of filing your Income Tax Return (ITR). It represents the remaining tax due after accounting for all TDS deducted and advance tax paid throughout the year.

In other words:

Self-Assessment Tax = Total Tax Payable
                    - TDS Deducted (from all sources)
                    - Advance Tax Paid
                    - Any other tax credits (TCS, MAT credit)

If the result is positive → you owe self-assessment tax. If the result is negative → you're entitled to a refund.

When Do You Pay Self-Assessment Tax?#

SAT is paid before filing your ITR. The portal requires you to pay any outstanding tax before you can submit your return.

Typical scenario:

1. You earned ₹10 lakh salary + ₹2 lakh freelance income
2. Employer deducted TDS on salary: ₹85,000
3. No advance tax paid on freelance income
4. Total tax on ₹12 lakh: ₹1,10,000
5. SAT = ₹1,10,000 - ₹85,000 = ₹25,000

How to Pay Self-Assessment Tax#

1. Visit incometax.gov.in → e-Pay Tax
2. Select Challan 280
3. Choose "Self-Assessment Tax" (300)
4. Enter your PAN, Assessment Year, and amount
5. Pay via net banking / UPI / debit card
6. Save the Challan Identification Number (CIN) — you'll need it for your ITR

Entering SAT in Your ITR#

After paying SAT:

1. In your ITR, go to the Tax Details section
2. Enter the challan details (BSR code, date of deposit, serial number, amount)
3. The system will validate and credit the payment against your liability

Interest on Late Payment#

If you pay SAT late (after the ITR filing deadline), you incur:

• Section 234A interest: 1% per month on outstanding tax
• Section 234B: 1% per month if advance tax paid was < 90% of total tax

Pay SAT as early as possible to minimize interest costs.

SAT vs Advance Tax#