12A/12AB Registration

Section numbers here are from the Income tax Act, 1961, the operative law for the current filing cycle. The Income tax Act, 2025 renumbers these provisions from Tax Year 2026-27 onward. This article is for general information and does not constitute tax advice.

From permanent to time-limited

Before 1 April 2021, registration under Section 12AA was perpetual once granted, unless specifically cancelled. Section 12AB replaced that with a fixed-term regime that every charitable or religious trust, society or Section 8 company now has to renew periodically to keep claiming exemption under Sections 11 and 12. Trusts already holding 12AA registration migrated through Form 10A; new trusts start directly under 12AB.

Provisional first, then regular

A new trust doesn’t get full registration straight away. It starts with provisional registration valid for 3 years, obtained through Form 10A. Before that runs out it must convert to regular registration by filing Form 10AB, and the deadline is whichever comes earlier: six months before the provisional period expires, or within six months of the trust actually commencing its charitable activities. If activities haven’t started, the second trigger simply doesn’t apply and the six-months-before-expiry deadline governs. Regular registration then runs for 5 years under the standard cycle.

A longer cycle for smaller trusts

The Finance Act, 2025 introduced a longer validity for smaller organisations. Where a trust’s total income, computed without giving effect to the Section 11 and 12 exemption, stayed at or below ₹5 crore in each of the two immediately preceding years, renewal grants 10 years instead of 5. Larger trusts, and those failing the two-year test, stay on the 5-year cycle. The registration certificate issued in either case is Form 10AC, carrying a Unique Registration Number.

Worked example: what the two cycles mean over 20 years

Two trusts, both past their initial provisional and first regular registration, looking ahead over the next 20 years. Trust A stayed at or below ₹5 crore in the two years before each renewal test and qualifies for the 10-year cycle throughout. Trust B ran slightly over ₹5 crore in one of the two preceding years at each test and stays on the 5-year cycle.

	Trust A (10-year cycle)	Trust B (5-year cycle)
Renewals needed over 20 years	2	4
Form 10AB filings over 20 years	2	4
Deadlines to track and not miss	2	4

Trust B carries exactly double the renewal exposure of Trust A over the same span, purely because of where it sat against the ₹5 crore line in the two years each test looked back at. A trust hovering close to that threshold has a genuine reason to manage its income recognition carefully in the run-up to a renewal test, since crossing it even once locks in the shorter cycle for that renewal, and each lapse of the 5-year cycle is a fresh opportunity to miss the six-months-before-expiry deadline covered below.

Renewal is permanent, recurring, and unforgiving

Form 10AB, filed at least six months before the current registration expires, is the renewal mechanism, and it recurs every cycle. 80G approval renewal can be combined into the same filing rather than handled separately.

Missing the window has real teeth. Registration lapses on expiry, and continuity generally cannot be claimed as a straightforward late renewal. The usual course is applying afresh under whatever rules are current then, unless condonation of delay is specifically granted under Section 119(2)(b) or a CBDT circular covers the situation, and neither is guaranteed.

Even a timely application isn’t a guarantee. Procedural queries and rejections on technical grounds happen to well-prepared filings, sometimes requiring resubmission. Building real buffer before the deadline leaves room to resolve those without putting the registration itself at risk.

The exit tax nobody budgets for

Losing registration is often described as simply losing exemption going forward. That understates it considerably. Under Section 115TD a trust can face tax on its accreted income, broadly the fair market value of its total assets less liabilities, charged at the maximum marginal rate. This is a charge on the accumulated asset base, not on a year’s income, and it sits on top of ordinary tax.

It is triggered where registration is cancelled, where the trust converts into a form not eligible for registration, where it merges with an entity that doesn’t hold similar registration, or where it dissolves without transferring its assets to another eligible institution within twelve months. The liability falls on the trust, and the principal officer and trustees can be held responsible for paying it.

For a trust that has accumulated property over decades on the strength of exempt income, this is the largest single number in the whole framework, and it is the real reason renewal deadlines deserve calendar discipline rather than a note in a file. It is also why winding up a charitable trust needs planning well before the decision is executed, not after.

If registration lapses in the meantime

For the period without registration, the organisation’s income is taxed like that of any other taxable entity, with the Sections 11 and 12 exemption unavailable until registration is restored or freshly granted. Being a Section 8 company under the Companies Act doesn’t help here; that status grants no income tax exemption on its own and needs separate registration under the Income Tax Act, exactly as a trust or society would.