Direct and Indirect Taxation · Filing of Return of Income
Defective Return, Late Fee and Consequences of Non-Filing
Updated 10 October 2026 · Fact-checked
Late or non-filing of a return of income attracts a fee under section 428: ₹1,000 if total income is up to ₹5,00,000, otherwise ₹5,000. Section 266(1) requires tax, interest and fee to be paid before filing, with proof of payment. The supplied text does not cover defective returns, so check that provision in the Act.
Understand Defective Return, Fees and Consequences of Non-Filing
Filing a return is not just a form. The Act expects the return to be accompanied by proof of tax paid, and to be filed on time. When any of these fails, there are consequences. This topic groups them.
Defective return. The text supplied for this page does not cover defective returns. It gives no definition, no time limit for correction and no effect of not correcting. Check the provision in the Act or ICMAI study material, and in an exam use the period and effect given in the question. What section 266(1) does say is that the tax, interest and fee must be paid before furnishing the return, and the return must carry proof of that payment.
Fee for default. Section 428 imposes a fee, not a penalty. Clauses (a) and (b) are two separate defaults with the same amounts.
- Clause (a): you fail to furnish a return required under section 263 by the due date in section 263(1).
- Clause (b): you furnish a return under section 263(5) beyond nine months from the end of the relevant tax year.
In each case the fee is ₹1,000 if total income does not exceed ₹5,00,000, and ₹5,000 in any other case. Section 428 also has fees for failing to get accounts audited and furnish the report under section 63, and for failing to furnish an accountant's report under section 172.
Interest and payment. Section 266(1) requires tax together with interest and fee payable for any delay in furnishing the return, or any default or delay in payment of advance tax, to be paid before the return is furnished. Section 266(4) says interest payable under section 423 is computed on the tax on the total income declared in the return, reduced by advance tax, TDS/TCS, and the reliefs and credits listed. The rate and the way of counting months are not in the text supplied, so use the rate given in the question.
Losses. Whether a late return affects the carry forward of losses is governed by the loss carry-forward provisions, which are not part of the text supplied here. Study the conditions and exceptions in the chapter on carry forward of losses.
Key rules to remember
- Fee for failing to file by the due date - section 428(a)
- Total income ≤ ₹5,00,000 → ₹1,000; otherwise → ₹5,000
- Applies when a return required under section 263 is not furnished by the due date in section 263(1). Test total income, not gross receipts.
- Fee for filing beyond nine months - section 428(b)
- Total income ≤ ₹5,00,000 → ₹1,000; otherwise → ₹5,000
- A separate default. It applies only when the return under section 263(5) is furnished beyond nine months from the end of the relevant tax year.
- Fee for failure to audit accounts - section 428(c)
- Delay up to one month → ₹75,000; thereafter → ₹1,50,000
- Applies where accounts are not audited and the report is not furnished as required by section 63.
- Fee for failure to furnish accountant's report - section 428(d)
- Delay up to one month → ₹50,000; thereafter → ₹1,00,000
- Applies to the report required by section 172.
- Payment before filing - section 266(1)
- Amount to pay before filing = (Tax on total income - amounts listed in section 266(2)) + interest + fee
- The amounts in section 266(2) include tax already paid, tax deducted or collected at source, relief under section 157, foreign tax relief under sections 159 and 160, and the tax credits listed there. Interest and fee are paid in addition to the tax. The return must carry proof of payment of tax, interest and fee. Do not confuse this list with the list used for the interest base in section 266(4).
- Order of adjustment of short payment - section 266(3)
- Payment adjusted first to fee, then to interest, then to tax
- Any balance left is tax still unpaid.
- Interest under section 423 (base) - section 266(4)
- Interest = Base tax × rate given in the question × period of delay
- Base tax = tax on total income declared in the return - advance tax - TDS/TCS - listed reliefs and credits under section 266(4). The rate and the month-counting rule are not in the supplied law, so use those stated in the question.
How to solve Defective Return, Fees and Consequences of Non-Filing questions
Use this order for any question on late, defective or non-filed returns.
- 1Find the due date and the actual date of filing. Work out whether the return missed the due date, and whether it was furnished beyond nine months from the end of the tax year.
- 2Check whether the return was defective. Apply the time limit and effect given in the question, as they are not in the text supplied here.
- 3Compute total income and pick the fee under section 428(a) or (b): ₹1,000 if total income is up to ₹5,00,000, else ₹5,000.
- 4Compute the base tax for interest under section 266(4): tax on total income less advance tax, TDS/TCS and listed reliefs and credits.
- 5Compute interest using the rate and month-counting rule given in the question. If the question asks for payment order, apply fee first, interest second, tax last.
- 6Add any audit-related fee under section 428(c) or (d) if accounts or reports are missing.
- 7If the question asks about losses, apply the carry-forward provisions from that chapter. Do not assume one rule for all losses.
- 8Write the final figures under clear headings and give one line of conclusion.
Quickest way: Three-line scan for MCQs and short answers
When to use it: In Section A MCQs and in 2-4 mark parts of written answers.
- Fee question: look only at total income. Up to ₹5,00,000 means ₹1,000. Above it means ₹5,000. Check whether clause (a) or clause (b) is the default.
- Interest question: base tax after section 266(4) reductions × rate given × period as the question counts it.
- Payment shortfall question: fee, then interest, then tax.
- Carry-forward question: go to the loss carry-forward chapter. Do not answer from sections 428 or 266.
Common mistakes in Defective Return, Fees and Consequences of Non-Filing
Applying the ₹5,000 fee because gross turnover is high.
Students look at receipts, not total income.
Fix: Use total income. Up to ₹5,00,000 the fee is ₹1,000.
Ignoring the month-counting rule stated in the question when computing interest.
Students count only complete months by habit.
Fix: If the question says interest runs per month or part of a month, round every part-month up. For example, 2 months 10 days counts as 3 months.
Calculating interest on total tax instead of tax after advance tax and TDS.
Students skip the reductions in section 266(4).
Fix: Deduct advance tax, TDS/TCS, and the listed reliefs and credits first.
Adjusting a part payment to tax first.
Common sense says clear the principal first.
Fix: Section 266(3) is clear: fee first, then interest, then tax.
Filing the return without first paying tax, interest and fee, or without proof of payment.
The word 'filed' misleads students into thinking that filing alone is enough.
Fix: Section 266(1) requires payment before filing and proof of payment with the return. The rules on defective returns are in a different provision that is not in the supplied text, so check the Act and apply the period and effect given in the question.
Treating clauses (a) and (b) of section 428 as one default or charging both fees for one late return.
Both clauses carry the same amounts, so they look alike.
Fix: Clause (a) is failure to file by the due date. Clause (b) arises only when the return is furnished beyond nine months from the end of the tax year. Read the facts of each clause.
Worked examples
Example 1
Mr. Ramesh Iyer, a salaried individual, has total income of ₹12,00,000 for the tax year. He has paid no advance tax. After deducting TDS and the other reductions in section 266(4), the base tax on which interest is computed is ₹60,000. He files the return 2 months and 10 days after the due date and has paid nothing before filing. The question tells you to take interest at 1% per month or part of a month. This rate and the part-month rule are assumptions given in the question. They are not stated in the law supplied for this page. Compute the fee and interest, and show how a payment of ₹6,000 would be adjusted.
Show the solution
- Fee: total income ₹12,00,000 exceeds ₹5,00,000, so fee under section 428 is ₹5,000.
- Delay: 2 months 10 days, counted as 3 months because the question says per month or part of a month.
- Base tax: tax on total income less advance tax, TDS and listed reliefs under section 266(4) is given as ₹60,000.
- Interest: ₹60,000 × 1% × 3 = ₹1,800, using the rate and rule given in the question.
- Total due: tax ₹60,000 + interest ₹1,800 + fee ₹5,000 = ₹66,800.
- Adjustment of ₹6,000 under section 266(3): first fee ₹5,000, balance ₹1,000 to interest, nothing left for tax.
- Unpaid after adjustment: interest ₹800 and tax ₹60,000.
Answer: Fee ₹5,000; interest ₹1,800 (on the rate and rule given in the question); total due ₹66,800. A payment of ₹6,000 clears the fee and ₹1,000 of interest, leaving interest ₹800 and tax ₹60,000 unpaid.
Example 2
Anita Desai, a trader, has a business loss for the tax year, so her total income is nil. She is required to furnish a return under section 263. She files it after the due date in section 263(1) but within nine months from the end of the tax year. State the fee payable.
Show the solution
- The return is filed after the due date, so section 428(a) applies.
- Total income is nil, which does not exceed ₹5,00,000, so the fee is ₹1,000.
- Clause (b) is not attracted because the return is filed within nine months from the end of the tax year. The only default is the late filing under clause (a).
- The effect of the late return on her loss is decided by the loss carry-forward provisions, not by section 428.
Answer: Fee ₹1,000 under section 428(a). Clause (b) does not arise.
Exam tips
- In MCQs, the fee figure usually turns on one fact: whether total income is above ₹5,00,000. Read that figure first.
- Always show the payment order of fee, interest, tax in numerical answers. It earns a separate step mark.
- Learn the four section 428 fee amounts as pairs: ₹1,000/₹5,000, ₹75,000/₹1,50,000, ₹50,000/₹1,00,000.
- Write the month-counting rule you are using beside every interest computation, so the examiner sees the basis of your figure.
- In theory answers, list defective return, late fee, interest and loss carry-forward under separate headings, and state only the rules you are sure of.
Practice questions from Filing of Return of Income
- Under the Income-tax Act, 2025, the Assessing Officer finds a return furnished by a salaried individual to be defective and intimates the de…
- Under section 264 of the Income-tax Act, 2025, which statement about the Scheme for returns through tax return preparers is correct?
- Under the Income-tax Act, 2025, an individual who is not a company and whose accounts are not required to be audited wants to file the retur…
- Ms. Priya's return for a tax year was held invalid because she did not rectify a defect in time. She rectifies the defect 20 days after the …
- Mr. Iyer filed an original return for a tax year and later discovers an omission. He wants to furnish a revised return. As per section 263(5…
Defective Return, Fees and Consequences of Non-Filing in other exams
The same ground in other exams, if you are preparing for more than one or want another angle on it.
Defective Return, Fees and Consequences of Non-Filing: frequently asked questions
What is a defective return and what happens if I do not rectify it?
The text supplied for this page does not cover defective returns, so it gives no definition, time limit or effect. Check the relevant provision in the Act or ICMAI study material and apply what the question states. What section 266(1) does require is payment of tax, interest and fee before filing, with proof of payment.
What is the late fee for filing income tax return after the due date?
Under section 428(a), the fee is ₹1,000 if total income does not exceed ₹5,00,000. In any other case it is ₹5,000. Section 428(b) is a separate default for a return furnished beyond nine months from the end of the tax year, with the same two amounts.
Can I carry forward losses if I file the return late?
The conditions for carrying forward losses sit in the loss carry-forward provisions, not in sections 428 or 266. Check the filing-date condition and its exceptions there. Do not assume one rule for all losses.
In what order is a short payment adjusted under section 266?
Section 266(3) says the amount paid is adjusted first against fee, then interest, and the balance against tax. Any unadjusted tax stays payable.
How is the interest base worked out under section 266?
Under section 266(4), interest payable under section 423 is computed on the tax on the total income declared in the return, reduced by advance tax, TDS/TCS and the listed reliefs and credits. Use the rate and month-counting rule given in the question.