The pension you built up since 1 April 1997 will increase in line with inflation every April, up to 5% a year.
The pension you built up before 1 April 1997 won’t increase.
If you were contracted out of the Additional State Pension before 5 April 1997, you might also get an extra amount to make sure your pension meets the Guaranteed Minimum Pension (GMP) we need to provide. Some of that extra amount will increase with inflation each year.
Check if you were contracted out of the Additional State Pension.