The rise is subject to Royal Mail accepting the regulator's overall price control, which is currently out for consultation, and Royal Mail said it would not take its decision on whether to accept until early March.
The 1p discount on franked and Printed Postage Impression First Class mail will remain, and has been extended to franked and PPI Second Class mail.
Business customers will find that prices for a range of services including Mailsort, Presstream and door-to-door have also been changed.
Royal Mail's prices are set for further change when Pricing in Proportion is introduced on August 21.
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