Mailing keys costs $4.15 for 1 ounce in 2026
USPS has a special price for keys and identification devices, like key tags that come back to you if lost. It costs $4.15 for 1 ounce and $0.29 for each extra ounce, up to $7.63 for 13 ounces.
Key and ID device postage from USPS
| 1 ounce | $4.15 |
|---|---|
| 2 ounces | $4.44 |
| 3 ounces | $4.73 |
| 4 ounces | $5.02 |
| 5 ounces | $5.31 |
| 6 ounces | $5.60 |
| 7 ounces | $5.89 |
| 8 ounces | $6.18 |
| 9 ounces | $6.47 |
| 10 ounces | $6.76 |
| 11 ounces | $7.05 |
| 12 ounces | $7.34 |
| 13 ounces | $7.63 |
| 1 pound | $13.21 |
| 2 pounds | $15.66 |
This price is for keys and ID devices returned through the mail. Source: USPS Notice 123, Price List, effective July 12, 2026 (Postal Explorer).
What changes your price
- Weight. Each ounce adds $0.29.
Ways to pay less
- Weigh the keys first. Most single keys are under 1 ounce.
How we got these numbers
USPS sets one national price for mailing keys. Every price on this page comes from USPS Notice 123, the official price list the Postal Service publishes. The prices we use took effect on July 12, 2026. Where we show a total, we simply add up the separate USPS fees, so you can see what one item costs all in. We do not add our own guesses or use a calculator, because USPS sets these fees and they are the same at every Post Office. USPS changes its prices from time to time, so check the price at the counter if your visit is far from September 26, 2026, the day we last checked.
Common questions
How much to mail a key?
$4.15 for 1 ounce.
How much for 2 pounds?
$15.66.