Section 343 specifies situations where income previously accumulated under Form 10 is retrospectively treated as income of an earlier year — triggering tax plus interest. This happens when accumulated funds are applied for purposes other than stated in Form 10, or remain unapplied after the 5-year period.
Registered NPOs that filed Form 10 for accumulation but did not use the funds as specified, or used them for a different purpose.
Scenario
In TY 2026-27, a trust accumulated ₹20 lakh via Form 10 for 'building a computer lab.' In TY 2028-29, the trust spends this ₹20 lakh on salaries instead.
Calculation
TY 2026-27: Accumulated ₹20L for computer lab → Exempt at that time TY 2028-29: ₹20L spent on salaries (wrong purpose) Deemed income for TY 2026-27: ₹20,00,000 Tax at MMR (30%): ₹ 6,00,000 Interest u/s 423 (approx. 2 years): ₹ 1,44,000 Total dues: ₹ 7,44,000
Result
The ₹20 lakh is retroactively taxed in TY 2026-27 with interest. The trust should either maintain purpose discipline or formally amend the Form 10 with AO approval before changing the application.
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Section references are based on the Income Tax Act 2025 (Tax Year 2026-27). Examples are illustrative — verify with a Chartered Accountant before filing.