Can You Use Old Postage Stamps?

Yes. U.S. postage does not expire. USPS states plainly on its First-Class Mail page that all postage stamps issued by the United States since 1860 remain valid, and a Forever stamp bought years ago is still worth today’s 1-ounce letter rate — $0.82 as of July 12, 2026 — no matter what you paid for it.

That old book of stamps in your desk drawer is not a collectible curiosity. It is usable postage.

Forever stamps vs. printed-value stamps

The two behave differently, and mixing them up is the most common reason mail gets returned.

What the stamp says	What it is worth today	How to use it
Forever	The current 1 oz letter rate — $0.82	One covers a standard letter, forever
Additional Ounce	The current extra-ounce price — $0.29	Add one per ounce over the first
Two Ounce	The current 2 oz letter price — $1.11	One covers a letter up to 2 oz
Non-Machinable Surcharge	1 oz price plus surcharge — $1.31	One covers a square or rigid 1 oz letter
Postcard	The current postcard price — $0.65	Use on postcards; a letter needs more
Global Forever	The 1 oz international price — $1.75	One covers a 1 oz letter to any country
A printed price, such as 37¢	Exactly 37¢ of postage, always	Combine until you reach today’s rate

A stamp with a number printed on it never “inflates.” A 29¢ stamp from 1991 is still 29¢ of postage. You simply add stamps until the total reaches the current price.

How to top up an old stamp

1. Find the required postage for your letter. A standard 1-ounce letter is $0.82 in 2026; heavier, square, or oversized pieces cost more.
2. Add up what you have. Scratch paper helps: 37¢ + 29¢ + 20¢ = 86¢, which is over $0.82 and perfectly fine to mail.
3. Stick them all in the upper-right corner. USPS reads the total, not the arrangement.
4. Leave the stamps uncovered. Do not tape over them, and do not layer them so thickly that the envelope bulges.

Overpaying slightly is normal and harmless — USPS does not refund the difference, but the letter mails.

Three exceptions worth knowing

• No price and no word. Some older nondenominated stamps (the “G” stamp, for example) carry a fixed value set when they were issued. Look the value up rather than guessing from the year.
• Semipostal (charity) stamps. Breast Cancer Research and similar fundraising stamps are worth the 1-ounce price on the day you bought them, not today’s price. One bought before a rate increase needs extra postage.
• Damaged stamps. If you cannot read the denomination, ask at a Post Office counter before relying on it.

Should you use old stamps or sell them to a collector?

USPS counts every stamp at face value only, however rare it looks. If a stamp might be worth more to a collector, ask a stamp dealer before you lick it. For ordinary modern Forever stamps — the ones bought in books of 20 or coils of 100 — face value is essentially the whole story, so using them is the better move.

Storing stamps so they stay usable

Old stamps fail for practical reasons long before they expire legally:

• Keep them flat and dry. Humidity makes self-adhesive stamps curl and stick to each other.
• Avoid direct sunlight, which fades both the design and the printed denomination.
• Do not peel self-adhesive stamps off their backing until you are ready to use them.
• Keep a small stack of additional-ounce stamps alongside your Forever stamps, so topping up does not turn into an arithmetic problem.

Frequently asked questions

Do Forever stamps expire?

No. An unused Forever stamp is always valid for one 1-ounce domestic First-Class letter, regardless of when you bought it or what you paid.

Can I use stamps from the 1990s?

Yes. Combine them until the total face value meets or exceeds the current postage for your mailpiece.

Will USPS take stamps that are slightly yellowed or curled?

Usually yes, as long as the denomination is readable and the stamp is not damaged. If a clerk questions it, they can verify it at the counter.

Is it worth buying discount Forever stamps?

If you mail regularly, yes — the savings compound with volume. We broke down the math in How Much Can You Save on Forever Stamps and explained why prices vary in Discount Stamp Prices Explained.

Replace that old book with fresh stock

Modern Forever stamps never lose value, so buying ahead is one of the few household purchases that genuinely cannot go stale. Start with our American Flag Forever stamps, the 2012 Four Flags issue, or browse the full commemorative range. Want to know what a letter cost in the years your old stamps came from? See the Forever stamp price history. If you mail for a business, buying Forever stamps in bulk is where the real savings are.

Need the stamps? Browse our full shop of discount USPS Forever stamps.