Skip to content

Direct Tax Laws and International Taxation · Assessment of Individuals including Non-residents

Assessment Procedure, Returns and Advance Tax for Individuals

Updated 11 October 2026 · Fact-checked

For an individual, you compute total income, work out tax, then subtract advance tax, TDS/TCS and foreign tax relief. Any balance, with interest and fee, must be paid before you file the return (section 266). The assessing officer then assesses the return. Non-residents follow the same steps, with treaty or foreign tax relief.

Understand Assessment Procedure, Returns and Advance Tax for Individuals

Assessment is the process by which tax on your income is determined and collected. For an individual it runs in a cycle: you pay tax during the year (advance tax and TDS/TCS), you file a return after the year, you clear any balance tax, and the department may then assess the return.

The key idea is that tax is paid in instalments during the year, not only at the end. TDS and TCS are collected by others on your behalf. Advance tax is paid by you. Both are credits against your final tax bill.

When you file the return, the Act requires you to pay any remaining tax first. This is self-assessment tax. Under section 266(1), if tax is payable on the basis of the return, you must pay it, together with interest and fee payable for delay in furnishing the return or for default or delay in advance tax, before furnishing the return. The return must carry proof of that payment.

A non-resident individual is assessed on the same pattern. The difference lies in what is taxed (income received or accruing in India, or deemed to) and in the relief for tax paid abroad. Section 266 lists foreign tax relief under section 159(1) or 160 (country outside India) and section 159(2) (specified territory outside India) among the amounts you deduct before computing the balance payable.

The Board may make rules on forms, procedure for refunds, calculation of interest and similar matters under section 533. So many procedural details, such as forms and electronic filing, sit in the rules rather than the Act.

Key rules to remember

Self-assessment tax payable
Tax on total income − advance tax − TDS/TCS − relief under section 157 − foreign tax relief (section 159/160) − tax credit under section 206 (as listed) + interest + fee
Section 266(1) and (2) list the amounts to be taken into account. Pay this before furnishing the return and attach proof.
Order of adjustment of a short payment
First fee, then interest, then tax
Section 266(3): if the amount paid falls short of tax, interest and fee together, it is adjusted in this order. Tax may therefore remain unpaid.
Base for interest under section 423
Tax on total income as declared in return − advance tax paid − TDS/TCS − relief under section 157 − foreign tax relief − section 206 credit claimed
Section 266(4). Note that advance tax paid is reduced here.
Assessed tax (base for interest under section 424)
Tax on total income as declared − TDS/TCS on income included in total income − relief under section 157 − foreign tax relief − section 206 credit claimed
Section 266(6). Advance tax is not deducted here. Interest under section 424 is computed on the assessed tax, or on the amount by which advance tax paid falls short of it (section 266(5)).
Consequence of non-payment
Unpaid tax, interest or fee → assessee in default
Section 266(8). This is without prejudice to other consequences (section 266(9)).

How to solve Assessment Procedure, Returns and Advance Tax for Individuals questions

Use this order for any question on return, advance tax or self-assessment for an individual, resident or non-resident.

  1. 1Fix the residential status and identify the income taxable in India.
  2. 2Compute total income and tax on it, using the rates the question specifies.
  3. 3List every credit: advance tax paid, TDS/TCS, relief under section 157, foreign tax relief under section 159 or 160, and section 206 credits.
  4. 4Compute interest separately, using the correct base for section 423 (advance tax deducted) and section 424 (advance tax not deducted).
  5. 5Add the fee for delay in filing the return, if any.
  6. 6Compute the amount payable before filing the return and state that proof of payment must accompany the return.
  7. 7If a part payment is made, apply it to fee first, then interest, then tax.
  8. 8State the consequence or recommendation clearly, such as assessee in default for any unpaid balance.

Quickest way: Credit-ladder method

When to use it: Numerical questions where you must find balance tax payable with the return.

  1. Write the tax on total income on the top line.
  2. Subtract credits one per line: advance tax, TDS/TCS, foreign tax relief.
  3. Mark the result as balance tax.
  4. Add interest and fee given in the question.
  5. Write the total as the amount to pay before filing.
  6. Check that the foreign tax relief is not more than the Indian tax on that income.

Common mistakes in Assessment Procedure, Returns and Advance Tax for Individuals

  • Deducting advance tax when computing the base for section 424 interest.

    Students copy the section 423 base for both interests.

    Fix: Section 423 base deducts advance tax paid; the assessed tax in section 424 does not. Only TDS/TCS and the reliefs are deducted there.

  • Filing the return first and paying the balance tax later.

    Students treat payment as a post-filing step.

    Fix: Section 266(1) requires payment before furnishing the return, with proof of payment accompanying it.

  • Applying a short payment to tax first.

    Tax feels like the main liability.

    Fix: Section 266(3) adjusts the payment to fee first, then interest, then tax.

  • Ignoring foreign tax relief for a non-resident or resident with foreign income.

    The relief is not shown in the main computation.

    Fix: Include relief under section 159(1), 160 or 159(2) in your credit list, as section 266(2) names them.

  • Quoting old section numbers from the Income-tax Act, 1961, such as 140A.

    Older notes are still in circulation.

    Fix: Use the Income-tax Act, 2025: self-assessment is section 266, and rules are made under section 533.

Worked examples

Example 1

For tax year 2026-27, an individual, Rohan Mehta, has tax on total income of ₹4,80,000. Advance tax paid is ₹2,50,000 and TDS is ₹1,10,000. There is no foreign tax relief, no interest and no fee. Find the self-assessment tax payable and state when it must be paid.

Show the solution
  1. Tax on total income = ₹4,80,000.
  2. Credits: advance tax ₹2,50,000 + TDS ₹1,10,000 = ₹3,60,000.
  3. Balance tax = ₹4,80,000 − ₹3,60,000 = ₹1,20,000.
  4. Under section 266(1), this must be paid before furnishing the return, and proof of payment must accompany the return.

Answer: Self-assessment tax is ₹1,20,000, payable before the return is furnished, with proof of payment attached.

Example 2

A non-resident individual, Anita Rao, has tax on declared total income of ₹6,00,000 for the year. TDS on income included in total income is ₹80,000. Relief claimed under section 159(1) for foreign tax is ₹40,000. Advance tax paid is ₹2,00,000. Find the assessed tax for section 424 interest and the base for section 423 interest.

Show the solution
  1. Assessed tax (section 266(6)) = ₹6,00,000 − TDS ₹80,000 − foreign tax relief ₹40,000 = ₹4,80,000. Advance tax is not deducted.
  2. Base for section 423 interest (section 266(4)) = ₹6,00,000 − advance tax ₹2,00,000 − TDS ₹80,000 − relief ₹40,000 = ₹2,80,000.
  3. Section 424 interest is computed on the assessed tax of ₹4,80,000, or on the amount by which advance tax paid falls short of it. Here the shortfall is ₹4,80,000 − ₹2,00,000 = ₹2,80,000.

Answer: Assessed tax is ₹4,80,000. The section 423 base is ₹2,80,000. The section 424 interest is on ₹4,80,000 or, where advance tax was paid, on the shortfall of ₹2,80,000.

Exam tips

  • Memorise the two interest bases in section 266(4) and (6); the one difference (advance tax) is a favourite objective question.
  • In numerical answers, show the credit list line by line so you earn method marks even if one figure is wrong.
  • For non-residents, mention foreign tax relief under section 159 or 160 and the treaty angle in a single line of the answer.
  • Use Income-tax Act, 2025 section numbers and the term tax year; do not write assessment year or section 140A.
  • Close with a clear statement of amount payable and the consequence of default.

Practice questions from Assessment of Individuals including Non-residents

Assessment Procedure, Returns and Advance Tax for Individuals in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Assessment Procedure, Returns and Advance Tax for Individuals: frequently asked questions

Must I pay tax before filing my return?

Yes, if any tax is payable on the basis of the return. Section 266(1) requires payment of that tax, with interest and fee, before furnishing the return. The return must be accompanied by proof of payment.

Which credits reduce the tax payable with the return?

Advance tax already paid, TDS and TCS, relief under section 157, foreign tax relief under section 159 or 160, and the section 206 tax credits listed in section 266(2). The balance is the self-assessment tax.

What happens if my payment is less than tax, interest and fee together?

Section 266(3) adjusts it first to fee, then to interest, and the rest to tax. So unpaid tax may remain, and you can be treated as an assessee in default for the unpaid part.

Do non-resident individuals follow a different procedure?

The self-assessment steps are the same. The differences are the income taxable in India and the foreign tax relief claimed, which section 266 lists among the amounts you deduct.