Key Takeaways
- FY = when you earn — Financial Year runs April 1 to March 31.
- AY = when you file taxes — Assessment Year is the year AFTER you earn.
- Golden Rule: AY = FY + 1 — Earned in FY 2023-24? File for AY 2024-25.
- Most people file for wrong year — selecting FY instead of AY on the portal.
- India uses Apr-Mar calendar — not the Jan-Dec calendar year.
You earned money in March 2024. You're filing taxes in July 2024. But the Income Tax portal asks you to select "AY 2024-25." Why not 2023-24? Why is this so confusing?
Every year, millions of Indians file Income Tax Returns (ITRs) for the wrong year because they don't understand the difference between Financial Year (FY) and Assessment Year (AY). The result? Defective returns, notices from the IT department, and hours wasted refiling.
What Is Financial Year (FY)?
Definition:
Financial Year (FY) is the 12-month period in which you earn income.
Key Details:
- Period: April 1 to March 31 (next year)
- Also called: Fiscal Year, Previous Year (PY)
- Purpose: Track when income was actually earned
- Used by: Companies for accounting, government for budgets
Why April to March (Not January to December)?
India's fiscal calendar follows the British system, adopted in 1867. The reason: agricultural cycles. April-March aligns with harvest seasons, making it easier to calculate agricultural income and revenue for the government.
Examples of Financial Years:
| Financial Year | Start Date | End Date | When You Earn |
|---|---|---|---|
| FY 2022-23 | April 1, 2022 | March 31, 2023 | All income earned during this period |
| FY 2023-24 | April 1, 2023 | March 31, 2024 | All income earned during this period |
| FY 2024-25 | April 1, 2024 | March 31, 2025 | All income earned during this period |
| FY 2025-26 | April 1, 2025 | March 31, 2026 | All income earned during this period |
What Counts as "Earning" in FY?
- Salary: When it's credited to your account (even if paid on March 31)
- Interest income: When it accrues (even if you don't withdraw it)
- Rental income: When rent is due (not when tenant actually pays)
- Capital gains: When you sell the asset (not when you originally bought it)
- Business income: When invoice is raised or service delivered
What Is Assessment Year (AY)?
Definition:
Assessment Year (AY) is the 12-month period in which you file your tax return for income earned in the previous Financial Year.
Key Details:
- Period: April 1 to March 31 (but it's the YEAR AFTER you earned)
- Purpose: Government "assesses" (calculates) your tax liability
- Filing deadline: July 31 of the AY (for most individuals)
- Relationship to FY: Always FY + 1 year
Why "Assessment" Year?
The word "assessment" means evaluation or calculation. The Income Tax Department assesses (verifies) your income and calculates your tax liability in the year AFTER you earned the money. This gives you time to gather documents and file accurately.
Examples of Assessment Years:
| Income Earned In (FY) | Tax Filed In (AY) | Filing Deadline |
|---|---|---|
| FY 2022-23 (Apr 2022 - Mar 2023) | AY 2023-24 | July 31, 2023 |
| FY 2023-24 (Apr 2023 - Mar 2024) | AY 2024-25 | July 31, 2024 |
| FY 2024-25 (Apr 2024 - Mar 2025) | AY 2025-26 | July 31, 2025 |
| FY 2025-26 (Apr 2025 - Mar 2026) | AY 2026-27 | July 31, 2026 |
The Golden Rule: AY = FY + 1
Always remember: Assessment Year is always one year ahead of the Financial Year.
Formula: AY = FY + 1
Example:
Income earned in FY 2023-24 → File tax in AY 2024-25
On the Income Tax Portal: When selecting the year, ALWAYS choose the AY (the higher year number), not the FY.
FY vs AY: Side-by-Side Comparison
| Factor | Financial Year (FY) | Assessment Year (AY) |
|---|---|---|
| Definition | Year when you EARN income | Year when you FILE taxes for that income |
| Period | April 1 to March 31 | April 1 to March 31 (of the NEXT year) |
| Also Known As | Fiscal Year, Previous Year (PY) | Tax Year, Assessment Year |
| Purpose | Track income earning period | Track tax filing and assessment period |
| What Happens | You work, earn salary, get interest | You file ITR, government assesses your tax |
| Example (2023-24) | April 1, 2023 to March 31, 2024 | April 1, 2024 to March 31, 2025 |
| What to Select on Portal | DON'T select FY for current filing | ALWAYS select AY when filing ITR |
| Relationship | FY comes first | AY = FY + 1 year |
Real-World Examples: When Did You Earn and When Should You File?
Example 1: Salaried Employee (Rajesh)
- Situation: Rajesh works at TCS. He received his salary from April 2023 to March 2024.
- Financial Year: FY 2023-24 (because he earned during Apr 2023 - Mar 2024)
- When to file: Between April 1, 2024 and July 31, 2024
- Assessment Year to select on portal: AY 2024-25
- Common mistake: Selecting FY 2023-24 on the portal (wrong!) instead of AY 2024-25
Example 2: Freelancer (Priya)
- Situation: Priya is a freelance designer. Her clients paid her from June 2023 to February 2024.
- Financial Year: FY 2023-24 (all income between Apr 1, 2023 and Mar 31, 2024)
- When to file: By July 31, 2024
- Assessment Year to select: AY 2024-25
- Note: Even though she got paid in Feb 2024, she files in AY 2024-25 (not AY 2023-24)
Example 3: Investor (Amit)
- Situation: Amit sold shares on December 15, 2023, making ₹2 lakh profit.
- Financial Year: FY 2023-24 (sale happened between Apr 2023 - Mar 2024)
- When to file: By July 31, 2024
- Assessment Year to select: AY 2024-25
- Tax treatment: Capital gains will be taxed in AY 2024-25 return
Example 4: Late Filer (Sneha)
- Situation: Sneha earned income in FY 2023-24 but forgot to file by July 31, 2024. She files in November 2024.
- Financial Year: FY 2023-24
- Assessment Year: Still AY 2024-25 (doesn't change just because you're late)
- Penalty: Late fee of ₹5,000 (if income > ₹5L) or ₹1,000 (if income < ₹5L)
- Deadline for belated return: December 31, 2024 (end of AY)
Common Mistakes and How to Avoid Them
Mistake 1: Selecting FY Instead of AY on Portal
Error: You earned in FY 2023-24. On the Income Tax portal, you select "FY 2023-24" thinking that's correct.
Result: You just filed for income earned in FY 2022-23 (one year EARLIER). Your current year's income is not reported. Return will be defective.
Fix: ALWAYS select AY (the higher year). For income in FY 2023-24, select AY 2024-25.
Mistake 2: Thinking Calendar Year = Financial Year
Error: "I earned money in 2024, so I'll file for 2024, right?"
Reality: There's no such thing as "tax year 2024" in India. We use FY 2024-25 (Apr 2024 - Mar 2025) or AY 2024-25, not calendar years.
Fix: Ignore the calendar year (Jan-Dec). Focus on Financial Year (Apr-Mar).
Mistake 3: Filing Too Early (Before FY Ends)
Error: Trying to file ITR in February 2024 for FY 2023-24 (which ends March 31, 2024).
Reality: You can't file for a year that hasn't ended yet. The portal won't even allow it.
Fix: Wait until April 1 or later to file. Most people file in May-July.
Mistake 4: Using Wrong Year on Form 26AS
Error: Downloading Form 26AS (tax credit statement) for FY instead of AY.
Reality: Form 26AS uses AY, not FY. If you select the wrong year, you'll see TDS from the previous year.
Fix: When downloading Form 26AS, select the AY (e.g., AY 2024-25 for income in FY 2023-24).
Mistake 5: Confusing "Previous Year" with Last Year
Error: IT Act uses the term "Previous Year" (another name for FY). People think it means "last year."
Reality: "Previous Year" = Financial Year (the year you earned). It's called "previous" because you're assessing it in the NEXT year.
Fix: Ignore the confusing terminology. Stick to FY = earn, AY = file.
Quick Check Before You File
Before clicking "Submit" on your ITR, verify:
- Year selected: Is it AY (not FY)?
- AY matches income period: Earned in FY 2023-24 → Filing for AY 2024-25?
- Form 26AS year: Did you download for the correct AY?
- Form 16 year: Does your employer's Form 16 show FY 2023-24?
- Deadline: Filing before July 31 of the AY?
If all 5 are YES, you're good to submit!
Why Does India Use This System?
Historical Reason:
India adopted the April-March fiscal year in 1867 under British rule. The logic: April is post-harvest season (Rabi crop), making it easier to calculate agricultural revenue for the colonial government.
Modern Reason:
Even today, changing to a Jan-Dec calendar would be massively disruptive:
- Budgets: Union Budget is presented in February for FY starting April 1
- Company accounting: All Indian companies close books on March 31
- Government schemes: Fiscal allocations run April-March
- Banking system: Interest calculations, audits all aligned to March 31 year-end
Countries That Use Apr-Mar Fiscal Year:
- India
- United Kingdom
- Japan
- Canada (government, not companies)
- Australia (government)
ITR Filing Timeline: A Year in the Life
FY 2023-24 (Earning Year):
- April 1, 2023: FY begins, start earning and tracking income
- Throughout year: Employers deduct TDS, you receive salary/income
- March 31, 2024: FY ends, stop earning for this year
AY 2024-25 (Filing Year):
- April 1, 2024: AY begins, ITR forms for FY 2023-24 become available
- May-June 2024: Employers issue Form 16 (TDS certificate)
- July 31, 2024: Deadline for most individuals to file ITR
- Aug-Dec 2024: Belated returns allowed (with penalty)
- December 31, 2024: Last date to file belated return
- March 31, 2025: AY ends
The Bottom Line: When in Doubt, Choose the Higher Year
The FY vs AY confusion trips up millions of taxpayers every year. But the solution is simple:
The 3 Rules That Never Fail:
- FY = When you earn (April to March)
- AY = When you file (The NEXT April to March)
- AY = FY + 1 (Always one year ahead)
On the Income Tax Portal:
- If filing in July 2024, select AY 2024-25 (not FY 2023-24)
- If filing in July 2025, select AY 2025-26 (not FY 2024-25)
- When in doubt, always choose the higher year number
Remember: You earned in FY, but you FILE in AY. The year you select on the portal should always be the AY—the higher of the two numbers.
What to read next:
→ Family Budget Guide — Manage household expenses
→ Floating vs Fixed Rates — Home loan
decisions
→ Calculate Net Worth — Track your wealth
