If you have to resupply your postage stash, you may want to get to the post office before next month.

The cost of a Forever stamp could go up a nickel starting in late January, USA Today reported.

The U.S. Postal Service proposed the changes in October and if approved, the cost of a Forever stamp will increase from 50 cents to 55 cents. That's the largest increase in stamp costs since 1991, according to USA Today.

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But while the first-class stamps will be more expensive, the USPS says it will lower the price per additional ounce for letters, decreasing from 21 cents to 15 cents, according to the price breakdown from the USPS.

It will also get more expensive to ship items. Priority Mail flat rate prices will increase. A medium flat rate box that currently ships for $13.65 will cost $14.35 next year.

The new prices go into effect on Jan. 27 if the Postal Regulatory Commission approves them, according to post office officials.

The cost of Forever stamps is going up in January if the Postal Regulatory Commission approves the latest proposal.

Credit: USPS.com

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Credit: USPS.com

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Laurence Walker, a volunteer with the Cajun Navy Relief, left, takes two volunteers out on his boat on Lake Oconee to search for Gary Jones, Tuesday, February, 18, 2024, in Eatonton, Ga. The Putnam County sheriff is investigating and searching after Spelman College instructor Joycelyn Nicole Wilson and an Atlanta private school coach Gary Jones went missing on Lake Oconee over a week ago, Saturday Feb. 8th. The body of Wilson was found Sunday, Feb. 9th and Jones has not been found. (Jason Getz / AJC)

Credit: Jason Getz / Jason.Getz@ajc.com