Tax Year in Income Tax - Replaces Previous Year

India’s Income Tax Act, 2025, introduced a major reform by replacing the term “Previous Year” with “Tax Year.” This change aligns India’s tax system with global standards, improves compliance, and enhances transparency.

“Tax year” means a period of twelve months starting from 1st April of a financial year. However, if a new business or profession is set up, or a new source of income starts during the year, the tax year will begin from the date of such start and will end on 31st March of that same financial year.

Now, in India, a Financial Year starts from 01st April and it ends with 31st March. For the purpose of Income Tax, this financial year earlier was called as previous year and the following year was called as Assessement year as we all know that Income Tax Return for income earned in one financial year is filed in next financial year.

What is Financial Year, Previous Year and Assessement Year

Lets take a period from 01st April 2025 to 31st March 2026. This is a 12 months period which starts from 01st April 2025 and it ends at 31st March 2026,

Now this 12 months period is called as follows-

  • Financial Year 2025-26.
  • Previous Year 2025-26

Now For Income Tax purpose, this period i.e 01st April 2025 to 31st March 2026 was called as previous year because Income Tax Return for this year is filed in the financial year i.e 2026-27. This year i.e 2026-27 was called as Assessement Year with respect to Previous Year 2025-26. Which is to say that the Income of Financial Year (Previous Year) 2025-26 is Assessed in Financial Year 2026-27 thereby 2026-27 becomes the assessement year for the previous year 2025-26.

How previous year replaced by tax year in new Income Tax Laws

Lets take the same example of the period from 01st April 2025 to 31st March 2026.

Now, earlier this 12 month period was called as follows:

  • Financial Year 2025-26
  • Previous Year 2025-26

Now, in the new Income Tax Act, the terminology of previous year has been replaced by Tax Year.

Thereby, now this 12 month period will be called as follows:

  • Financial Year 2025-26
  • Tax Year 2025-26

Thereby, it helps simplify the law for common man, by simply replacing previous year with Tax year denoting that tax year is the 12 month period in which one earns money and for which he is to pay tax & file return in the subsequent tax year.

What happens to Assessement Year Now ?

The concept of Assessement year also vanishes under New Income Tax Now.

Assessement Year meant the subsequent year in which the Income Tax Return was filed for the Income earned in the previous year.

Now, this Assessement Year is simply replaced under Income Tax Act as Following/subsequent Tax Year.

Meaning, Income Tax Return of a Tax year is to be filed in the following Tax Year.

That is to say, Income Tax Return for Salary Earned in Tax Year 2025-26 is to be filed in the next tax year i.e Tax Year 2026-27.

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CA Bhuvnesh Goyal Partner
CA Bhuvnesh Goyal is a Chartered Accountant with expertise in taxation, finance, and business compliance. He shares practical insights to help readers navigate complex financial matters with ease.