For most taxpayers the maximum pension contrbution is £40,000 each tax year, although this depends on their earnings. This limit covers both contributions by the individual and their employer.
Note that the unused allowance for a particular tax year may be carried forward for three years and can be added to the relief for the current, but then lapses if unused. Note also that for higher rate taxpayers the net cost of saving £10,000 in a pension is only £6,000 but this higher rate relief may not last for ever.
