When Do Stamp Prices Increase In 2024. Washington, dc — today, the united states postal service filed notice with the postal regulatory commission (prc) of mailing services price changes to take. If it is approved, this would go into effect july 14 and would increase stamp prices by 7.8%.

This probably won’t be the only stamp price increase in 2024, either. The cost of a forever stamp is set to increase in july 2024 as part of the us postal service’s ‘delivering for america’ plan.