State pension payouts are set to rise by 3.9% in April - probably. We can be almost certain of this - but not quite 100%.
Much like minimum wage, these are normally announced in the Budget. Given that was postponed the official rate isn't known yet.
That said, the Government has guaranteed the rules won't change around pension rises - and under those rules, retired Brits are in line for a 3.9% increase adding £5.05 a week to the ‘old’ basic state pension and £6.60 a week to the ‘new’ state pension.