What is Assessment Year and Financial Year in Income Tax?

As per Income Tax Act, 1961, financial year or FY refers to the 12 month period starting from April 1 to March 31 in the next calendar year during which income subject to income tax is earned. During this period tax saving investments can also be made by the tax payer in order to decrease their income tax liability. As per current rules, income earned in a FY is under one or more the following heads - income from salary, income from profits and gains from business or profession, income from house property, income from capital gains and income from other sources.

An Assessment Year in income tax is the period during which the income earned during the previous Financial Year is estimated for tax purposes. This is the time when taxpayers have to submit their Income Tax Returns (ITRs), claim deductions, report taxes paid, and complete any other income tax-related formalities.

The Assessment Year comes immediately after the Financial Year ends. For example, for income earned in FY 2025-26, the corresponding Assessment Year will be 2026-27. In simple words, Financial Year is when income is earned, and the Assessment Year is when the income earned is assessed by the Income Tax Department and the income tax return needs to be filed. Knowing this concept helps in choosing the correct year for filing ITR and avoiding mistakes related to taxation.

Assessment Year (AY) is commonly mentioned in conjunction with Financial Year (FY). This is because in Income Tax Act, 1961 these two terms were intrinsically linked. While these terms are related, the terms Financial Year and Assessment Year cannot be used interchangeably.

Below is a comparison between assessment year vs. financial year as per Income Tax Act, 1961:

Note: After implementation of the Income Tax Act, 2025 from April 1, 2026, the concept of FY and AY have been scrapped. The Income Tax Act, 2025 uses a single uniform terminology of tax year instead.

The Assessment Year always follows the Financial Year. As a result, the AY is typically one year ahead of the FY. The table below provides a reference for commonly used Financial Years and their corresponding Assessment Years.

Note: From an income tax perspective, there will not be any FY 26-27 or AY 27-28. These will be replaced with the terminology of tax year 2026-27 instead. This has happened as the concept of AY and FY have been discontinued under the Income Tax Act, 2025.

The Income Tax Act, 2025, introduces the Tax Year concept from 1 April 2026 to simplify tax reporting and compliance. The new concept replaces the separate use of Former Year/Financial Year and Assessment Year with the single uniform concept of Tax Year to simplify understanding and compliance of Income Tax.

The new framework states that a Tax Year is the 12-month period from 1 April to 31 March. This is expected to simplify tax compliance and reduce the confusion between related terminologies - FY and AY.

For instance, income for the year beginning on 1st April 2026 and ending on 31st March 2027 will be listed as income earned during Tax Year 2026-27. This change is expected to help the taxpayer clearly understand their tax liability by using a single reference point.

It is important to select the right Assessment Year (AY) when you are filing your Income Tax Return (ITR). The Assessment Year (AY) comes immediately after the Financial Year (FY) in which the income was earned. You can use the following steps to determine the correct AY while filing your ITR.

• Step 1 - Identify Financial Year: The financial year when income has been earned for which the return is being prepared.
• Step 2 - Find the Corresponding Assessment Year: The Assessment Year will always be the year immediately following the Financial Year.
• Step 3 - Review Key Tax-Related Documents: Review Form 16, Form 26AS, AIS and TIS. These documents are typically accompanied by a relevant Financial Year and should assist you in choosing the appropriate AY.
• Step 4 - Fill the Correct Assessment Year on the Income Tax Portal: During the ITR filing process, you must fill in the Assessment Year, which is the year in which the income earned in the former Financial Year is estimated for taxation.
• Step 5 - Check Before Submitting the Return: Check the chosen AY before submitting your return. An incorrect year could cause delays in processing, mismatches to tax credits, or the requirement for a corrected return.

For the investors who want to make timely decisions to save tax, understanding both the financial year and the assessment year becomes critical. Planning before 31st March helps in reducing the taxable income. Here’s what you can do:

• Invest up to ₹1.5 lakh under Section 80C, a legitimate option, such as ELSS, NSC, and life insurance premiums.
• Pay eligible life insurance and health insurance premiums within the Financial Year to claim deductions under Sections 80C under the old tax regime and Section 80D.
• Make eligible donations under Section 80C before 31 March to claim tax benefits.
• Review your investments and set off eligible capital losses against capital gains, where applicable.
• If your estimated tax liability after considering TDS exceeds ₹10,000 in a financial year, pay advance tax by 15 March to avoid interest penalties.
• Keep records of the investment plan, premium payments, and donation receipts for smooth tax filing in the Assessment Year.
• Consider tax-efficient solutions such as life insurance plans and ULIPs that can support long-term financial goals while offering tax benefits under applicable provisions of the Income Tax Act.

Note: Section 80C deductions are available only under the old tax regime.

Financial Year (FY) and Assessment Year (AY) play an important role in proper tax filing. The Financial Year is the year of the income earned and the Assessment Year is the year where the income is estimated and reported. Understanding the proper assessment year for income tax filling is crucial to prevent ITR filing mistakes and ensure easier tax compliance. It also provides the opportunity for better tax planning and helps taxpayers make better financial choices for the year.