Its been said before - don’t need to put 100% of salary in. Make sure of your tax free allowance and reduce your income to £12.5k (if that’s yours) Not sure about NI these days, so check it and factor a bit of that in too if required. So you get £1k a month and pay no income tax at all after the HNRC reconciliation.
The balance into a SIPP, accessible in 2024 or 2025 at age 55 is fine. You will get the tax back on anything taken at source. Not the NI though.
The 25% lump sum, doesn’t trigger the money purchase annual allowance of 4k - it’s only when you take an income.
By taking the 25% - it’s a 100% benefit crystallisation event, so i don’t believe you will get any more tax free lump sum on future contributions or investment growth.
So yes it is a very tax efficient maneuvre at that level.
Other factors….
You may need to be wary of Lifetime allowance of £1.073m, either now or in the future. Punitive tax rates, which are going to screw pensioners in about a decade, but few people think that far in advance and think they wiling ever accrue that much lol. Dont forget any DB schemes, use a 20x multiplier of annual income to contribute to that.
There is a chance that labour will immediately in their first budget stabdardise the standard and higher rate tax reliefs on pension payments.
Im 53, i’m hoping they don’t change the minimum retirement ages before 2024! There is an issue about productivity of the UK right now and is regarded as a barrier to growth (the real problem we face in the uk right now - once you get past the immediate COL crisis) and if they can screw a few wealthy middle class people, with a ‘it’s fairer for all’ argument to increase their coffers and thus spending capacity, i see this as an easy win for them. They are going to have such a huge majority, they will be able to do anything.
25% Lump sums….. I’ve heard some horror stories of that being emergency tax coded at the point it’s taken…. You can get it back but as always, HMRC finds it easy to take moeny and is never keen to return it quickly, so be cautious with your timings.
Finally…. I’m not a FA or an IFA…. I suspect the big thing for you will be the MPAA, so please double/triple check that for your own benefit.