Do I need a transitional tax-free amount certificate?

Since 6 April 2024, a client who took benefits under the old Lifetime Allowance doesn’t start the new regime with a clean £268,275 lump sum allowance. There’s a standard transitional deduction first — 25% of the LTA percentage they used — and it’s built on the assumption that every past crystallisation took the maximum tax-free cash. A Transitional Tax-Free Amount Certificate swaps that assumption for evidence of the tax-free cash actually paid. Here’s the part that’s easy to miss: it isn’t a lever you pull when it suits. It replaces the assumption with the facts, and it binds whichever way those facts fall. So “do I need one?” really comes down to three questions.

1. Will the evidence beat the 25% assumption?

The default assumes maximum tax-free cash every time. That overstates things whenever income was taken without much cash alongside it — the classic case being defined-benefit scheme pension, where a big slice of the LTA gets used up for comparatively little PCLS. If the real tax-free amounts were lower than the default assumes, a certificate hands allowance back. Take a client who used 80% of the £1,073,100 LTA — that’s £858,480 crystallised — much of it DB pension, with scheme statements evidencing £150,000 of actual tax-free cash:

That’s £64,620 of headroom the default would have quietly buried. DB-heavy histories are the textbook “yes”.

2. Could the evidence be worse than the assumption?

It can — and then a certificate costs your client, permanently. If a scheme-specific protected lump sum paid out more than 25%, the evidenced deduction comes in above the default. Same 80% history as before, but this time the evidence shows £250,000 of tax-free cash:

Once a certificate is issued there’s no going back to the default, so applying before you’ve worked both paths is exactly how a £35,380 mistake happens. On these facts, the engine’s recommendation is to leave well alone and stay on the default.

PTM174000 — figures engine-computed against the 2026/27 config

3. Can your client still apply — and is the LSDBA in play?

Timing is the quiet trap. The application has to be made before the first relevant benefit crystallisation on or after 6 April 2024 — after that, the default is locked in for good. So this is a conversation for the start of the advice, not for when an excess turns up down the line. And don’t forget the death-benefit side: a certificate substitutes evidence for both allowances at once, and pre-75 serious-ill-health lump sums and death benefits carry a 100% transitional default on the LSDBA, not 25%. If one of those sits in the history, it moves the death-benefit arithmetic far more than the LSA arithmetic — so model it before applying.

The short version

Lean towards a certificate when DB scheme pension dominates the history, the actual tax-free amounts can be evidenced from scheme records, and there’s been no post-April-2024 crystallisation yet. Lean against it when maximum or protected (over-25%) tax-free cash was taken, the amounts can’t be evidenced, or there’s a pre-75 ill-health or death-benefit event in the mix. And whatever the answer looks like, work both paths first — the certificate can’t be undone.

The TTFAC calculator runs the default and the evidence path side by side and flags which one wins; for the full two-way mechanics, see when the certificate makes things worse.

PTM174000 (lock-in, evidence) · PTM174200 (LSDBA transitional defaults) · FA 2024 Sch 9