The tapered annual allowance is a limit on pension contributions before you pay a tax charge, which is lower than the normal annual allowance.
It may apply if your income is over £200,000 in a tax year.
If it applies, your annual allowance may be reduced below £60,000.
The lowest it can usually go is £10,000.
This means less can be added to your pensions before you may need to pay a tax charge.
The rules depend on your income and pension payments, so you may need to check this carefully.
You can check if this applies to you on GOV.UK: