A Forever Stamp on a standard, single-ounce letter currently costs $0.66. This price, set by the United States Postal Service (USPS), allows you to send one ounce of first-class mail anywhere in the United States no matter how prices change later. The value of a Forever Stamp is tied to the cost of a one-ounce First-Class Mail letter; if postal rates rise, you add additional stamps or postage instead of replacing old Forever Stamps. Use this guide to understand pricing, coverage, and how to calculate the right amount of postage for envelopes, flats, and heavier mail.
What Is a Forever Stamp
The Forever Stamp is a nondenominational First-Class Mail stamp sold by the USPS at the current one-ounce letter price. Its defining trait is that it remains valid for first-class letters regardless of future price increases. When you buy a Forever Stamp at $0.66, you are paying the exact one-ounce letter rate at the time of purchase. For future mailings of one ounce or less within the United States, that stamp covers the required postage without adding extra cost. You do not need to purchase new stamps for each rate change as long as you bought enough Forever Stamps to match the new rate when you mail your item.
Pricing and Current Rates
Current Price and Scope
As of the latest published rates, a Forever Stamp for a one-ounce letter costs $0.66. This single stamp is sufficient to mail a standard letter weighing up to one ounce to any U.S. address. If your letter weighs more than one ounce, you must either use additional ounces priced at $0.26 per extra ounce or include enough Forever Stamps to equal the combined total. For example, a letter weighing two ounces would require $0.92 in postage, which could be met with one Forever Stamp and one additional ounce stamp, or two Forever Stamps if the new two-ounce rate aligns.
Price History and Rate Stability
The Forever Stamp was introduced in 2007 at $0.41, and its price has adjusted over time in response to rising mailing costs and USPS regulatory requirements. Historically, rates have increased every few years, often in increments of a few cents. Understanding this pattern helps you plan: buying Forever Stamps over time at various prices still covers future one-ounce mailings because the stamp’s value tracks the First-Class letter rate. Below is a simplified comparison of notable price points and timing to illustrate how the cost per Forever Stamp has evolved.
| Price per Forever Stamp | Effective Period or Rate Date | Context |
|---|---|---|
| $0.41 | 2007 (introduction) | Initial Forever Stamp price for first-class one-ounce letters |
| $0.42 | 2007–2008 (small increase) | First adjustment after introduction |
| $0.44 | 2008–2009 | Continued rate adjustments |
| $0.47 | 2010–2011 | Reflects rising operational costs |
| $0.49 | 2013 | Mid-decade adjustment |
| $0.50 | 2015 | Move to $0.50 prior midyear increase cycle |
| $0.55 | 2016–2018 | Series of increases to align with costs |
| $0.58 | 2019–2020 | Rate set in regulatory environment |
| $0.59 | 2020–2021 | Pandemic adjustments and inflation factors |
| $0.60 | 2021 | Post-pandemic rate readjustments |
| $0.63 | 2023 | Continued cost-based updates |
| $0.66 | 2024 | Current published rate for first-class one-ounce letters |
How to Calculate Postage for Common Items
- Standard Letter (1 ounce): One Forever Stamp at the current one-ounce rate ($0.66).
- Letter Over 1 Ounce: Add $0.26 for each additional ounce or portion thereof; use multiple Forever Stamps or additional-ounce stamps to reach the exact total.
- Postcard: Typically requires less postage than a letter; currently often $0.66, but lower postcard-specific rates may apply depending on shape and size.
- Large Envelope (Flats): Pricing is based on weight, size, and shape; you usually cannot rely on a single Forever Stamp and should check the USPS price calculator for exact amounts.
Practical Tips and Best Practices
When to Use Forever Stamps
Use Forever Stamps when mailing standard letters up to one ounce within the United States. If you anticipate sending letters over time, buying Forever Stamps at current prices can protect you against future rate increases. For packages, flats, or heavier letters, you will likely need additional postage beyond a single Forever Stamp. Always verify the total weight and dimensions and use the USPS price calculator or consult retail counters for accurate postage.
Common Mistakes to Avoid
- Assuming one Forever Stamp suffices for any weight: it only covers up to one ounce for first-class letters.
- Using outdated postage for postcards if specific postcard rates apply; check current postcard pricing.
- Relying only on Forever Stamps for flats and large envelopes; these often require higher-value stamps or metered postage.
- Forgetting to include extra ounces when a letter exceeds one ounce; each additional ounce or portion costs $0.26.
Special Considerations and Limitations
Forever Stamps are designed for standard domestic first-class letters. International mail, priority mail, express services, and specialized items (such as oversized envelopes or packages) have different pricing structures that do not align with the Forever Stamp model. For items requiring extra services like tracking or insurance, you must purchase additional services beyond basic postage. If you are sending mail to military addresses (APO/FPO), treat them as domestic for pricing, but verify size and weight rules to ensure correct postage. When in doubt, ask a USPS associate or use the official price tools to avoid underpaying or overpaying.
Bottom Line
A Forever Stamp currently costs $0.66 and covers postage for one standard first-class letter up to one ounce within the United States. It remains valid for future one-ounce letters even if postal rates increase, though heavier mail requires additional postage. By knowing the current price, how weight affects postage, and when to use Forever Stamps versus other options, you can mail confidently and cost-effectively.