How Much Are Additional Ounce Stamps Worth?
Understand the precise value of additional ounce stamps and how to effectively use them for your postal needs. Maximize your postage knowledge.
An additional ounce stamp serves as a specific type of postage designed to cover the cost of mailing items that exceed the standard initial weight for First-Class Mail. This stamp provides a convenient way to add the necessary postage for heavier letters or flats without requiring a precise combination of multiple base-rate stamps. Its purpose is to supplement primary postage, ensuring mail pieces with extra weight reach their destination.
Understanding Additional Ounce Stamps
Additional ounce stamps cover the incremental cost for each ounce a mail piece weighs beyond the initial standard ounce. For First-Class Mail letters, the initial ounce is covered by a standard stamp, such as a Forever stamp. These supplemental stamps are distinct from Forever stamps, which always cover the prevailing base rate for a one-ounce letter, regardless of future price adjustments.
Additional ounce stamps streamline the process of mailing heavier items. Instead of purchasing multiple full-value stamps, these stamps allow for precise postage application. They provide flexibility, enabling senders to combine them with Forever stamps or other denominational stamps to meet the exact postage requirement for mail up to 3.5 ounces.
Determining Current Value
The current monetary value of an additional ounce stamp is $0.29 for First-Class Mail letters, effective July 13, 2025. This value is subject to periodic adjustments by the United States Postal Service (USPS), reflecting changes in operational costs and economic factors. Unlike Forever stamps, which are non-denominational, additional ounce stamps have their monetary value printed on them.
To verify the current value, individuals can consult the official USPS website, visit a local Post Office, or refer to USPS rate charts. These resources provide accurate information on all postage rates, including those for additional ounces. Staying informed about these rates helps ensure proper postage application and avoids potential mail delays.
Using Additional Ounce Stamps Effectively
To use additional ounce stamps effectively, calculate the total postage needed for a mail piece based on its weight. For a First-Class Mail letter, this typically means applying a standard one-ounce stamp (like a Forever stamp) for the first ounce, then adding an additional ounce stamp for each subsequent ounce, up to a maximum of 3.5 ounces. For example, a two-ounce letter requires one Forever stamp and one additional ounce stamp.
These stamps can be combined seamlessly with other postage, such as Forever stamps or stamps with specific denominations, to meet the exact required postage amount. For instance, if a letter weighs 2.5 ounces, apply a Forever stamp for the first ounce and then two additional ounce stamps for the remaining weight.