What is Assessment Year? Meaning, definition & how it works in India
Assessment year, or AY, is the year in which the Income Tax Department evaluates the income you earned in the financial year just before it. In India, every financial year runs from April 1 to March 31. The moment a financial year ends, its corresponding assessment year begins. FY 2023-24 ends on March 31, 2024. AY 2024-25 begins on April 1, 2024.
This is the year in which you file your ITR, pay any remaining tax after accounting for TDS and advance tax, and interact with the Income Tax Department if needed. The term is defined under Section 2(9) of the Income Tax Act, 1961, governed by the Central Board of Direct Taxes (CBDT).
In informal usage, assessment year is also referred to as the “tax year.” In Hindi, it is called निर्धारण वर्ष (Nirdharan Varsh), which translates to “year of determination.” The financial year, in contrast, is sometimes called the “previous year” in legal tax language because it is the year preceding the assessment.
Did you know? Most countries define a single “tax year” covering both when income is earned and when it is filed. India separates these into two distinct terms: the financial year (when income is earned) and the assessment year (when it is taxed). This distinction matters every time you fill out a tax challan, ITR form, or advance tax payment.
How does assessment year work?
At its most basic, the assessment year is the administrative window the IT Department uses to process the income you reported from the previous year. Once a financial year closes, there is a defined period in which returns must be filed, reviewed, and assessed. That period is the assessment year.
Here is the sequence, step by step:
- Income is earned during the financial year. Example: salary, rental income, or business profits earned between April 1, 2023 and March 31, 2024 fall under FY 2023-24.
- Advance tax is paid during the FY itself, in four instalments. These payments are credited against the upcoming AY.
- TDS is deducted by employers, banks, and other deductors throughout the financial year.
- ITR is filed during the assessment year. For most individuals, the due date is July 31 of the AY unless CBDT extends it.
- The IT Department processes the return, matches TDS credits, advance tax payments, and declared income, then either issues a refund or raises a tax demand.
- Scrutiny notices and assessments (if any) are issued under the AY reference. All paperwork, notices, and rectifications link back to this year.
The AY typically ends on March 31 of the following year, though assessment and rectification proceedings may continue beyond that in certain cases.
Pro tip: When logging into incometax.gov.in to file a return or track a refund, the AY dropdown defaults to the current year. Always verify it before submitting. Filing AY 2024-25 data under AY 2023-24 is one of the most common errors taxpayers make, and correcting it requires filing a revised return.
Example of Assessment Year with real numbers
Consider Meera, a 34-year-old marketing manager working in Mumbai with an annual CTC of ₹16 lakh.
Between April 2023 and March 2024 (FY 2023-24), her employer deducts TDS totalling ₹1,80,000 over 12 months. Meera also pays advance tax of ₹20,000 in March 2024. Her total income for the year, after standard deduction, comes to ₹14,50,000.
On July 28, 2024, she logs into the income tax portal and files her ITR for FY 2023-24. She is now operating in AY 2024-25.
| Event | Financial year (FY 2023-24) | Assessment year (AY 2024-25) |
|---|---|---|
| Salary earned | April 2023 to March 2024 | — |
| TDS deducted (employer) | Across 12 months | Credited to AY 2024-25 |
| Advance tax paid | March 2024 | Credited to AY 2024-25 |
| ITR filed | — | July 28, 2024 |
| Refund processed | — | Under AY 2024-25 |
| IT scrutiny notice (if any) | — | References AY 2024-25 |
Meera’s total tax liability for the year works out to ₹1,87,500. Her combined TDS and advance tax payments of ₹2,00,000 exceed this by ₹12,500.
That refund of ₹12,500 gets credited to her bank account and appears on the income tax portal under AY 2024-25. Her Form 26AS and Form 16 from her employer both carry the same AY reference.
Key components — what to look for
Breaking down how assessment year connects to the rest of the tax system makes it easier to use correctly.
- Fixed start date — Every AY begins on April 1, without exception. AY 2025-26 begins April 1, 2025. This is set by Section 2(9) of the Income Tax Act and does not change based on notifications or budgets.
- Corresponding financial year (previous year) — Each AY is paired with exactly one financial year. AY 2024-25 covers income from FY 2023-24. The Income Tax Act formally calls the FY the “previous year” because it precedes the assessment.
- AY vs FY difference — The financial year is when you earn; the assessment year is when that income is taxed. They are always one year apart. FY 2024-25 income will be assessed in AY 2025-26. A quick rule: the second number in the AY always matches the second number in the preceding FY.
- Advance tax linkage — Advance tax instalments are paid during the FY (June 15, September 15, December 15, March 15) but are booked against the upcoming AY. A ₹50,000 advance tax payment made in December 2023 gets credited to AY 2024-25.
- ITR filing deadline — The standard deadline for filing ITR in the AY is July 31 for individuals not subject to audit. Missing this date means filing a belated return, which can attract penalties under Section 234F.
- Refund and demand tracking — Refunds are displayed by AY on the income tax portal. If a refund for excess TDS from FY 2022-23 has not arrived, you track it under AY 2023-24, not by the calendar year.
- Form 16 and Form 26AS — Both documents carry the AY reference. If your Form 16 says AY 2024-25 but you accidentally filed under AY 2023-24, the TDS credit will not match and your refund will not be processed.
Frequently asked questions
What is assessment year meaning in income tax?
Assessment year is the 12-month period beginning April 1 each year in which the Income Tax Department formally reviews and processes income earned in the previous financial year.
Every ITR you file is attached to an AY. For income earned during FY 2023-24 (April 2023 to March 2024), the relevant assessment year is AY 2024-25.
What does assessment year mean in Hindi?
In Hindi, assessment year is called निर्धारण वर्ष (Nirdharan Varsh). Nirdharan means “determination” and Varsh means “year.”
It refers to the year in which your income is formally determined and evaluated for taxation by the Income Tax Department.
When does assessment year begin?
Every assessment year in India begins on April 1. AY 2024-25 began on April 1, 2024. AY 2025-26 begins on April 1, 2025.
This start date is fixed under Section 2(9) of the Income Tax Act, 1961, and does not change based on budget announcements or circulars.
What is the difference between assessment year and financial year?
The financial year is when you earn income. April 1, 2023 to March 31, 2024 is FY 2023-24.
The assessment year is the following 12 months, April 1, 2024 to March 31, 2025, when that income is taxed, reviewed, and processed.
The FY is when it happened; the AY is when the tax on it is worked out. They always come one after the other, never together.
What is assessment year also known as?
Assessment year is informally called the “tax year” in everyday usage. The Income Tax Act refers to it formally as AY.
Older tax documents sometimes use the phrase “year of assessment.”
Outside India, particularly in countries like the UK, the term “tax year” covers what India separates into two distinct terms: the financial year and the assessment year.
How does assessment year work for advance tax?
Advance tax is paid during the financial year itself in four instalments, with deadlines on June 15, September 15, December 15, and March 15.
Even though these payments are made during the FY, they are credited against the upcoming assessment year.
When the IT Department processes your ITR in AY 2024-25, it checks whether the advance tax paid during FY 2023-24 matches your total liability for that year.
Why does assessment year matter for tax refunds?
Refunds are tracked and processed by AY on the income tax portal. If TDS was deducted in excess during FY 2023-24, the refund for it appears under AY 2024-25 on your dashboard.
If your ITR is filed under the wrong AY, or if TDS credits were booked under a different AY, the IT system cannot match them automatically. The refund does not get released until the mismatch is corrected through a rectification request.
When should I consider a CA for AY-related issues?
If you have advance tax challans credited to the wrong AY, TDS entries that are not reflecting in Form 26AS, or a refund pending for more than two assessment years, these are situations where a CA or tax consultant can help move things faster.
Online rectification on the portal handles straightforward mismatches. AY corrections on physical challans, however, require a written application to your Assessing Officer’s office, and a CA familiar with that process can save you multiple trips.