Summary: In direct taxation, the Previous Year (PY) and Assessment Year (AY) are fundamental concepts. The Previous Year is the financial year, from April 1st to March 31st, in which income is earned. The Assessment Year is the subsequent financial year in which the income from the Previous Year is assessed by the tax authorities, and the tax return is filed. For example, income earned in PY 2023-24 (April 1, 2023, to March 31, 2024) is assessed in AY 2024-25. While this is the standard rule, there are several exceptions, primarily to prevent tax evasion or to address specific business scenarios. These exceptions include cases of income escaping assessment (Section 147), deemed accrual of income for non-residents, and income from a discontinued business. Additionally, a new business may have a short Previous Year that is less than twelve months, and certain transactions, such as benami arrangements or non-resident shipping income, have specific rules for when their income is taxed.
1. What is the Previous Year (PY)?
As per Section 3 of the Income Tax Act, 1961:
The Previous Year means the financial year immediately preceding the Assessment Year in which the income is assessable.
Standard Financial Year =
1st April – 31st March of the next year.
Example:
If you earned income between 1st April 2023 – 31st March 2024, then:
The Previous Year (PY) is 2023–24.
2. What is the Assessment Year (AY)?
Definition:
The Assessment Year (AY) is the year immediately following the Previous Year, in which the income earned in the PY is assessed by the Income Tax Department.
Example:
For PY 2023–24, the corresponding AY is 2024–25.
During AY 2024–25, the individual or business will:
✔ File their Income Tax Return (ITR)
✔ Compute tax liability based on income of PY 2023–24
✔ Pay tax for that PY
3. Normal Rule of PY → AY Flow
| Previous Year (PY) | Income Earned | Assessment Year (AY) |
| 1 Apr 2023 – 31 Mar 2024 | Salary, Business Income, Capital Gains | 1 Apr 2024 – 31 Mar 2025 |
This is the standard practice where the income of a PY is assessed in the immediately following AY.
4. Key Exceptions to the PY → Immediate AY Rule
Exception 1: Income Escaping Assessment – Section 147
- Income not disclosed in the original return, detected later by the Income Tax Department.
- ➔ Tax is levied in a later AY, even though the income relates to an earlier PY.
Example:
Undisclosed income of PY 2018–19is detected in AY 2024–25 → Assessed under Section 147.
Exception 2: Deemed Accrual of Income – Section 9(1)
- Certain types of income are deemed to accrue or arise in India in a specific PY, even if received later.
Example:
A non-resident provides technical services in PY 2019–20, but payment is received in PY 2022–23→
The royalty is deemed to accrue in PY 2019–20 → Tax assessed in AY 2020–21.
Exception 3: Income of Discontinued Business
- When a business is discontinued mid-PY, the income is computed only up to the date of discontinuation and assessed in a special AY.A business runs from 1 Apr 2020 – 31 Dec 2021, and is discontinued →
Income up to 31 Dec 2021is assessed in AY 2021–22.
Exception 4: Non-Resident Shipping Income – Section 44B
- Income of a non-resident from shipping business is calculated on a deemed basis (percentage of freight receipts) and taxed in the PY in which the shipping activity occurs, irrespective of when payment is received.
Exception 5: Benami / Alienation of Assets to Avoid Tax – Sections 69, 69A, etc.
- When a person tries to avoid tax by transferring assets (e.g., in a benami arrangement), the income is deemed to belong to a specific PY and taxed when detected, even if in a later AY.
Exception 6: New Business Setup (Short Previous Year)
- When a new business is started during a financial year, the Previous Year (PY)is calculated from the date of business commencement till 31st March of that financial year.
Example:
Business starts on 1st November 2023 →
PY = 1 Nov 2023 – 31 Mar 2024 → Assessed in AY 2024–25.
This is an exception to the assumption that PY is always 12 months long.
Summary Table of Exceptions
| No. | Exception Type | Relevant Section | Brief Explanation |
| 1 | Income Escaping Assessment | Section 147 | Income of PY reassessed in later AY when detected |
| 2 | Deemed Accrual of Income | Section 9(1) | Income deemed to accrue in earlier PY irrespective of actual receipt |
| 3 | Discontinued Business Income | Section 5(2) | Tax income up to date of discontinuation in specific AY |
| 4 | Non-Resident Shipping Income | Section 44B | Deemed income taxed in PY of activity |
| 5 | Benami / Alienation of Asset | Sections 69, 69A | Income deemed in PY and assessed later when detected |
| 6 | New Business Setup (Short PY) | Section 3 | PY from date of business start to 31st March of that year |
Conclusion
In most cases, the Previous Year (PY) and Assessment Year (AY) follow a simple rule:
Income of PY → Assessed in the next immediate AY.
But important exceptions exist to reflect:
✔ Economic substance of transactions
✔ Prevention of tax evasion
✔ Correct treatment of new businesses and special non-resident cases
Mastering these rules and exceptions ensures you remain fully compliant and can confidently handle professional tax assessments.
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