To ensure I don't overflow my pension in future, I require some way of best-guessing what the pension pot limit will be when I retire (it's currently £1.25M, soon to be £1M due to new policy).

Assuming I can withdraw from age 55 in the future, I will need to project forward 27 years from now (I am currently 28 years old).

Let's assume I can contribute the maximum of £40K each year.

Assuming the limit remained at £1M, and assuming an annualised market return of 9%, I would only need to make 3 years of contributions (£120K) to breach the £1M limit by retirement age - which would result in taxation on the difference (and hence poor financial planning in hindsight!).

However, it seems unlikely this limit will be £1M in 2043. One assumption would be a limit closer to £2M, given an estimated 3% annualised inflation.

How should I calculate when to stop contributing to my pension? (For example, is projecting a future pension pot limit based on inflation sensible?)

  • I'm not familiar with UK rules, but why would you be concerned about overflowing the account? Is there a penalty for doing so?
    – quid
    Mar 10, 2016 at 17:57
  • 3
    Yes, there's effectively a penalty, and the way in which it's applied varies depending on how you withdraw the pension. Ultimately it's not in your best interest to overflow the pot moneyadviceservice.org.uk/en/articles/… Mar 10, 2016 at 18:14

1 Answer 1


Predicting government regulation in the near future is hard enough. Predicting what the government will do 25 years out is so hard I'm not sure there is a good answer to your question.

Your assumptions and answer seems sensible and you appear to be doing the right calculations. You might improve on this by making a couple scenarios. Would it be worth putting some extra money in just on the chance that the limit might rise faster? What about if it rises more slowly? If capturing the upside of tax deferral is more important than the penalty, as I suspect it might be, than maybe being 10%-20% over the limit is a better way to go.

  • Very good point re. the positives of tax deferral. I will need to double-check that the interest is not taxed, and the penalty does in fact only apply when you come to withdraw - in which case your point about the advantages of tax deferral would be a good argument for overflowing despite the penalty. Mar 10, 2016 at 21:43
  • @Rhasket the tax penalties are quite severe so its best not to hit the limit and there are tax efficient things like EIS VCT's which can be used if you are going to hit the limit
    – Pepone
    Mar 12, 2016 at 16:41

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