Forever Stamps are a simple way to send a standard letter no matter when you bought them, as long as the letter remains under one ounce and postal rates allow continued use. At the post office, the price of a Forever Stamp always matches the current one-ounce First-Class Mail letter rate, which the United States Postal Service sets based on delivery costs and congressional guidelines. Understanding how pricing works, where to buy, and how many you need helps you avoid surprises at the counter and make predictable plans for ongoing mail needs.
What Is a Forever Stamp
A Forever Stamp is a nondenominated definitive stamp that the USPS sells for First-Class Mail letters up to one ounce. The defining rule is that once you buy it, the stamp remains valid for mailing a one-ounce letter forever, even as postal prices rise. Forever Stamps cannot be split into smaller denominations for use as regular stamps, and the mailer must still meet size, weight, and shape rules to qualify for the published letter price.
Current Forever Stamp Price at the Post Office
At the post office, a single Forever Stamp for a standard letter costs the current First-Class Mail one-ounce rate. As of the most recent published pricing change in July 2025, that rate is $0.66 for a letter up to one ounce. The price at the post office counter reflects this rate, plus applicable sales tax in some jurisdictions, and may vary slightly by location for in-store purchases. To get the exact total, ask the clerk for the current price list or check the USPS rate chart online before you buy.
Key Pricing Table: Price, Letter Weight, and Validity
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Price (July 2025) | $0.66 per Forever Stamp for a one-ounce letter | USPS published retail rates |
| Letter Weight Limit | Up to 1 ounce | USPS First-Class Mail domestic rules |
| Validity | Forever for one-ounce First-Class Mail letters | USPS official policy |
| Sales Tax | Applicable in some states at the point of sale | State tax regulations |
How to Buy Forever Stamps at the Post Office
You can buy Forever Stamps at the post office counter, from retail machines inside the lobby, or sometimes from outdoor vending kiosks during standard hours. Staff can sell books of stamps and individual stamps and can provide receipts for purchases. Payment options typically include cash, checks, credit cards, and contactless methods depending on the location. If rates have recently changed, the clerk will apply the new price to your purchase, so confirm the amount due before you complete the transaction.
Rules That Affect Forever Stamp Usage
- Weight rule: The letter must weigh 1 ounce or less to use a single Forever Stamp at the published rate.
- Size and shape rule: Letters must meet standard USPS dimensions for First-Class Mail, or they may be charged higher rates.
- Timing rule: Forever Stamps remain valid regardless of purchase date, but postal rates can change, so a Forever Stamp bought today will always cover the one-ounce letter rate in effect when you mail it.
- Non-denomination rule: Forever Stamps cannot be broken into smaller value stamps for partial postage.
- International and extra services: Forever Stamps do not cover additional fees like international shipping, tracking, or certified mail.
Recent Historical Price Context
Forever Stamp prices have changed several times over the years as the USPS adjusts rates to cover delivery costs. Understanding these changes helps you plan mail budgets and see how a single stamp once covered a letter and now covers only a one-ounce letter at the current rate.
| Date or Period | Event | Why It Matters |
|---|---|---|
| July 2025 | Rate change to $0.66 for a one-ounce letter | Current price for a single Forever Stamp |
| July 2024 | Rate change to $0.63 | Previous price before mid-2025 adjustment |
| January 2023 | Rate change to $0.60 | Earlier adjustment under recent pricing rules |
| January 2021 | Rate change to $0.55 | Prior increase tied to postal cost trends |
| January 2019 | Rate change to $0.50 | Earlier standardized pricing period |
Common Questions and Misconceptions
Some people assume Forever Stamps lose value if postal rates rise, but in practice they simply become sufficient for the current one-ounce letter rate without needing an additional stamp. Others wonder whether buying in bulk saves money; the USPS often provides slight per-stamp discounts in book form, but the total value equals the number of stamps multiplied by the current rate. At the post office, clerks follow the same published prices as online, so in-person and digital purchases should always align if the rate list is current.
Tips for Managing Forever Stamp Purchases
- Check the latest rate on the USPS website or by asking the clerk before you buy.
- Buy books if you mail frequently, as they may offer small per-stamp savings and reduce checkout friction.
- Combine purchases with other shipping needs to avoid extra trips.
- Track the date you bought stamps if you plan to use them years later, mainly for personal records rather than postal rules.
- Use a Forever Stamp for each one-ounce standard letter; do not add extra stamps to cover weight beyond one ounce, instead use additional ounces rates or extra services.
When to Use Alternatives Instead of Forever Stamps
If your letter weighs more than one ounce, you must calculate additional ounces or choose different postage. For time-sensitive or tracked items, services like Priority Mail, Certified Mail, or USPS Tracking provide specific benefits that Forever Stamps do not include. International mail requires different pricing and customs forms, so Forever Stamps are not valid alone. In these cases, the post office staff can help you select the correct postage and avoid returns or extra trips.