Cost Of First Class Stamp 2025 Uk. Compare the royal mail postage rates for both first class and second class mail items and see how much you can save with mailmark franking. A first class stamp for a large letter costs £1.60, but after the october price hike, it will cost 35p more,.

Buy first and second class stamps from royal mail. The cost of a first class stamp is £1.25 after the rise on october 2, 2023.