Income tax thresholds, which have been frozen under successive chancellors, are expected to start to rise again after 2031.
John Healey may not have mentioned this change in his Budget speech - after all, it is still some way off - but according to the documents released by the Office for Budget Responsibility (OBR) this policy, which has been shaving additional tax off people's take-home pay for the past five years, is scheduled to end.
The proportion of your income that is taken in tax will continue to go up over the next four years in line with decisions made in previous Budgets.
But then the personal allowance - the point at which you start to pay tax - and other thresholds, where you tip into paying a higher rate of tax, will rise again with inflation, meaning you keep more of what you earn.
Freezing thresholds is often dubbed a stealth tax because, unlike raising the headline rates, it is not as obvious on your payslip.