It's July. Your Form 16 has landed in your inbox, and the income tax portal is finally working properly. You feel like you're one login away from being done for the year.
But here's something worth knowing: most people who get a tax notice this year did not get it because they skipped filing their Income Tax Return, or ITR for short. They got it because they filed in a hurry instead of filing carefully.
The due date for most individual taxpayers, meaning people filing ITR-1 or ITR-2, for the Financial Year 2025-26 (also called FY 2025-26, or Assessment Year 2026-27, written as AY 2026-27) is 31st July 2026. If you miss it, or file it carelessly, the cost is not just a late fee. You could lose refunds, lose the ability to carry forward certain losses, and receive automated mismatch notices that take months to sort out.
Below are the mistakes that trip up honest taxpayers every single year, explained simply, along with exactly how to avoid each one.
In This Post:
The Deadline, in One Table
Mistake 1: Filing the Wrong ITR Form
Mistake 2: Not Checking Your AIS, TIS, and Form 26AS
Mistake 3: Skipping Exempt Income
Mistake 4: Leaving Out Foreign Assets or Crypto Income
Mistake 5: Wrong Bank Details Blocking Your Refund
Mistake 6: Filing Online but Never Verifying It
Mistake 7: Mixing Up the Different Return Deadlines
Worked Example: What a Late Filing Actually Costs
FAQs
Key Takeaways
Go Deeper
Disclaimer
The Deadline, in One Table
Before we go through the mistakes, here is exactly which date applies to you.
| Taxpayer Category | Due Date (AY 2026-27) |
|---|---|
| Individuals filing ITR-1 or ITR-2 (salaried, no audit needed) | 31 July 2026 |
| ITR-3 or ITR-4 filers not requiring an audit (freelancers, small business owners) | 31 August 2026 |
| Belated return (if you miss the date above) | 31 December 2026 |
| Revised return (to correct mistakes in a return you already filed) | 31 March 2027 |
As of July 2026. The government sometimes extends deadlines in unusual years, but it is risky to plan your filing around a possible extension that may never come. Penalties apply the moment you cross the original date.
Mistake 1: Filing the Wrong ITR Form
Picking the wrong form does not just slow you down. It turns your return into what the tax department calls a defective return, which can be rejected completely, forcing you to refile under time pressure.
Here is a simple check: if you have salary income, one house property, and other income like interest or dividends, ITR-1 usually works for you. But this only holds true if your long-term capital gains, often shortened to LTCG, meaning profit earned from selling shares or funds you held for a longer period, from equity shares or mutual funds stay under ₹1.25 lakh for the year, and you have no other capital gains.
If you cross that LTCG limit, or you have gains from property, debt funds, gold, Exchange Traded Funds (commonly called ETFs), or crypto, you need ITR-2 instead. If some of those gains came from an ETF, ETF capital gains reporting follows the same tax rules as regular equity shares.
Fix: Before you open the filing website, write down every source of income you had this year: salary, rent, interest, dividends, capital gains, crypto, and any foreign income. Then match your list against what each form actually covers.
If you are unsure, ITR-2 covers a wider range of income types than ITR-1, so it is rarely the wrong choice for a salaried person who also has investments.
Mistake 2: Not Checking Your AIS, TIS, and Form 26AS
The tax department's system automatically compares your return against information reported by your employer, your bank, your broker, and your mutual fund provider. Even a missed ₹50 dividend triggers the same automatic mismatch alert as a much bigger gap would. The system does not care how small the amount is, it only checks whether the numbers match.
Fix: Log in to the income tax portal and open three documents before you fill in a single field. Your Annual Information Statement, called AIS, your Taxpayer Information Summary, called TIS, and your Form 26AS, which is simply a statement showing tax already deducted or paid on your behalf. Check every entry in these documents against your own records.
Building this one habit alone prevents most of the notices that get sent out after filing season.
You may also want to read: What Is SIP? How Systematic Investment Plans Build Wealth in India
Mistake 3: Skipping Exempt Income Because It Feels Unnecessary
Agricultural income, interest from your Public Provident Fund (commonly known as PPF), life insurance maturity money, and LTCG below the ₹1.25 lakh limit all cost you zero tax. But all of it still needs to be written down in your return.
Leaving something out just because no tax applies to it is still a filing mistake. It is a common way that honest, careful taxpayers still end up with a mismatch notice.
Fix: Think of "exempt from tax" and "not worth mentioning" as two completely different things. If money entered your account, or you made any kind of gain, it needs to be recorded somewhere on the form, even if that section is just for exempt income.
The same idea applies to any deductions you are claiming. If you invested in an ELSS fund this year, meaning an Equity Linked Savings Scheme, a type of mutual fund that comes with a fixed lock-in period, make sure your ELSS lock-in and Section 80C claim are backed by proper proof. Section 80C refers to a part of the Income Tax Act that allows you to reduce your taxable income through specific investments and expenses.
Mistake 4: Leaving Out Foreign Assets or Crypto Income
A foreign bank account, an investment held overseas, or even a small dividend from a US stock bought through an Indian app, all of it needs to be declared. This falls under Schedule FA and FSI inside ITR-2. Crypto and similar holdings, officially called Virtual Digital Assets or VDA, have their own stricter disclosure rules this year.
Not disclosing foreign assets falls under a separate law called the Black Money Act, which carries penalties far more serious than regular income tax rules. This is not an area where small oversights get overlooked.
Fix: If you have ever held a foreign account, a foreign stock, or made any crypto transaction this year, assume it needs its own section in your return. Collect the relevant statements well before the deadline, not at the last moment.
Mistake 5: Wrong Bank Details Blocking Your Refund
This year, the portal only sends refunds to bank accounts that are pre-validated, meaning approved in advance, and EVC-enabled, where EVC stands for Electronic Verification Code, a method used to confirm your identity. An incorrect IFSC code, meaning the code that identifies your bank branch, an account that has not been validated, or an account linked to a different PAN, which stands for Permanent Account Number, your unique tax identity number, means your refund simply has nowhere to go.
Fixing this after the fact means submitting a refund re-issue request and waiting several extra weeks.
Fix: Log in to the portal, go to My Profile, then Bank Accounts, and confirm your account shows as pre-validated before you begin filing, not after you have already submitted your return.
Mistake 6: Filing Online but Never Verifying It
Submitting your return is only the first step. It is not legally considered filed until you verify it electronically, a step commonly called e-verification, and you only have 30 days from your filing date to complete it.
Miss that window, and your return is treated as though it was never filed at all, with the same late fees and lost benefits you would face by not filing in the first place.
Fix: Verify your return on the same day you file it, using an Aadhaar One-Time Password (commonly shortened to OTP), your net banking login, or whichever method you prefer. Do not put this off for later.
Mistake 7: Mixing Up the Different Return Deadlines
These three terms sound alike, but they mean very different things, and confusing them can be an expensive error.
| Return Type | When It Applies | Deadline (AY 2026-27) |
|---|---|---|
| Belated Return | You missed the original due date completely | 31 December 2026 |
| Revised Return | You filed on time but need to fix an error | 31 March 2027 |
| Updated Return (ITR-U) | You missed the belated deadline as well | Within 48 months of the assessment year, with 25 to 70 percent additional tax |
Fix: A revised return can only be filed if you have already filed an original return or a belated one. If you have not filed at all yet, your remaining options are the belated return, due by 31 December, or later, an Updated Return, which comes with a steep additional tax cost.
Do not wait for the December deadline assuming you can simply revise your way out of never having filed in the first place.
Worked Example: What a Late Filing Actually Costs
These numbers are for illustration only, not a real case.
Suppose Rohan, a salaried professional, earns a total income of ₹9 lakh and misses the 31 July deadline. He files instead on 15 September 2026, with ₹20,000 in unpaid self-assessment tax:
- Late filing fee (Section 234F): ₹5,000, since his income is above ₹5 lakh
- Interest (Section 234A): 1 percent per month on the unpaid ₹20,000 tax for around 2 months, so about ₹400
- Lost benefit: Any capital or business losses from this year cannot be carried forward to future years
- Regime lock-in: Filing after the due date automatically places him in the new tax regime, so he loses the choice of the old regime even if it would have saved him more money
The ₹5,400 in direct penalties often turns out to be the smaller part of the cost. Losing the ability to carry forward losses and losing the choice of tax regime usually end up mattering more over time.
FAQs
Q1. What is the ITR filing due date for FY 2025-26 (AY 2026-27)?
31st July 2026 for individuals filing ITR-1 or ITR-2. Taxpayers filing ITR-3 or ITR-4 who do not need an audit have until 31st August 2026.
Q2. What happens if I miss the ITR deadline?
You can still file a belated return by 31st December 2026. You will pay a late fee under Section 234F, which is ₹1,000 if your income is up to ₹5 lakh and ₹5,000 above that, along with interest on any unpaid tax, and you will lose the right to carry forward most losses.
Q3. Can I choose the old tax regime if I file late?
No. Filing after the due date automatically places you under the new tax regime, even if the old regime with your deductions and exemptions would have worked out cheaper for you.
Q4. Do I need to report income that is tax exempt, like PPF interest or agricultural income?
Yes. Exempt income still needs to be recorded in the correct section of your return, even though no tax applies to it. Leaving it out is still a filing mistake and can still trigger a mismatch notice.
Q5. What is the difference between a belated return and a revised return?
A belated return is for when you missed the original deadline entirely, and is due by 31st December 2026. A revised return is for correcting mistakes in a return you already filed on time or as a belated return, and is due by 31st March 2027. You can only revise a return that was actually filed in the first place.
Key Takeaways
- The due date for most salaried individuals is 31 July 2026. Do not plan around an extension that may not happen.
- Check your AIS, TIS, and Form 26AS carefully before you fill in a single number.
- Report exempt income and small amounts too, since the automatic system does not care about the size of the mismatch.
- Pre-validate your bank account and verify your return on the same day you file it.
- Filing late costs more than just the fee. You also lose loss carry-forwards and the choice of tax regime.
Go Deeper
- What Is an Index Fund? A simple next step once tax season is behind you and you are ready to start investing with a clear head.
- What Does Promoter Holding Really Tell You About a Stock? Useful once you move beyond mutual funds and start picking individual stocks.
- FII vs DII: Who Is Really Buying the Indian Stock Market? Helpful context on where larger institutional money is moving this year.
Disclaimer: This content is for educational purposes only and does not count as investment or tax advice. Tax rules and deadlines can change, and markets and tax positions carry risk. Please consult a SEBI-registered investment advisor or a qualified chartered accountant before making any financial or filing decisions specific to your situation.