There is no one-size-fits-all answer to this. It will vary from person to person and will depend on how much you will need to fund the lifestyle you want in retirement and when you plan to retire.
If you have a money-purchase pension, the performance of your investments between now and when you retire will have an impact on the size of your pension pot.
Regardless of the type of pension you have, the effects of inflation mean it can be hard to know exactly how much you’ll need in order to meet your expectations.
But in rough terms, if you’re on target to receive a full state pension and you expect to work until the statutory retirement age, building up a personal pension pot of about £200,000 means you might expect to receive a total income of between £20,000 and £25,000 a year (including the full state pension allowance).
If you pay into a pension throughout your working life, building up about £70,000 by the time you are 40 you have a greater chance of hitting that £200,000 target by retirement, although this is not guaranteed.
However, if you haven’t hit that figure or if you haven’t been saving since you started working it’s never too late to start a pension.