A first-class stamp is the price you pay to mail a single standard letter weighing 1 ounce or less through the United States Postal Service First-Class Mail service. As of the most recent update, the cost for a Forever First-Class stamp is $0.66. This price covers delivery of one letter to any address within the contiguous United States, with limited exceptions for certain nonprofit mailers. The rate includes transportation, processing, and final delivery. If your letter exceeds 1 ounce, you must add additional postage in $0.24 increments per extra ounce. This guide explains how first-class stamp pricing works, what influences rates, and how to calculate total cost for common mailing scenarios.
What Is First-Class Mail and How Does Pricing Work
First-Class Mail is the Postal Service’s flagship service for personal and business correspondence, bills, cards, and lightweight parcels. Pricing is based on a base rate for the first ounce plus additional ounces when weight exceeds that threshold. The base rate for a first-class stamp is set by the Postal Regulatory Commission and approved by the Postal Service Board of Governors. Nonprofits with a permit can pay a discounted rate; these nonprofit First-Class Mail prices are lower than standard retail prices. The published price for a single, retail First-Class stamp is the most relevant number for most individual senders.
Current First-Class Stamp Price and Cost Examples
Because postage rates change periodically, the most reliable way to know the cost is to check the Postal Service’s current rate chart or retail price list. The following table shows typical retail pricing for a single, first-class stamp and total cost for common weights, based on the current published rate for Letters, Flats, and Cards.
| Weight | Retail Cost (1 stamp) | What It Covers |
|---|---|---|
| 1 ounce or less | $0.66 | Delivery via First-Class Mail within the U.S. |
| 2 ounces | $0.90 | $0.66 base plus $0.24 for the second ounce |
| 3 ounces | $1.14 | $0.66 base plus $0.24 for each additional ounce |
| 3.5 ounces (up to letter size 12.5” x 6.875”) | $1.14 | First-Class price for letters within size limits |
| Large envelopes (1 oz) | $1.50 | First-Class Price for flats (larger letters) |
Factors That Influence First-Class Stamp Prices
Several factors determine how much you pay for a first-class stamp. The base rate for the first ounce is the primary driver, and additional ounces are priced in increments. Size matters: if your mailpiece is larger than standard letter dimensions but within flats limits, you pay the First-Class price for flats rather than the simple stamp rate. Shape can also matter, because nonrectangular or rigid items may be priced as parcels. Nonprofit permit holders pay discounted retail prices, which lowers the effective cost per piece for eligible organizations. Finally, where and how you purchase stamps affects what you pay; vending machines, online print-and-mail services, and post office windows may show small variations due to convenience fees or bundled offerings.
How to Calculate Total Cost for a First-Class Letter
To determine how much to pay, start with the base rate for the first ounce ($0.66 as of the latest rate). Then add $0.24 for each additional ounce or fraction thereof. For example, a 1.2-ounce letter requires one Forever First-Class stamp ($0.66) plus one additional ounce stamp or equivalent ($0.24), totaling $0.90. If you are using a nonprofit permit rate, replace the base rate with the permitted nonprofit price per ounce and apply the same additional-ounce rule. Use the published rate chart to verify the latest numbers before printing or purchasing stamps.
First-Class vs Other Services and Trade-offs
First-Class Mail vs USPS Priority Mail
First-Class Mail is typically slower than Priority Mail, with delivery in 1–5 business days depending on distance. Priority Mail offers faster, more predictable delivery and may include tracking and insurance at a higher price. Choose First-Class for lightweight, time-tolerant letters and Priority when speed or proof of delivery matters more.
First-Class Mail vs Marketing Mail
Marketing Mail is designed for larger mailings and offers lower per-piece prices than First-Class, but it is slower and has fewer tracking options. Use First-Class when you need individualized, timely delivery; use Marketing Mail for high-volume, non-urgent campaigns.
First-Class vs Retail Postage Online
Buying online or through shipping software can be convenient and may include delivery confirmation and tracking at no extra cost. In many cases the price equals or slightly exceeds the retail First-Class rate, plus any processing fees from the vendor.
Practical Tips and Common Questions
- Always check the weight and dimensions before dropping mail in a collection box; oversized or overlong pieces may be returned or charged at a higher category.
- If you frequently send 1-ounce letters, consider a book of Forever stamps to lock in the current rate and avoid future increases.
- Nonprofit organizations should verify permit pricing and eligibility to ensure they are using the lowest allowable rate.
- Keep an eye on announced rate changes, typically announced in January and July, to budget mailing costs accurately.
- Use delivery confirmation and tracking when available, especially for important or time-sensitive correspondence.
Key Dates and Rate Change History
Postal rates for First-Class Mail are subject to periodic adjustments approved by the Postal Regulatory Commission. The published rates in this article reflect the most recent change at the time of writing. For the most authoritative and up-to-date information, consult the official USPS rate chart or retail price list.