How Much Does It Cost to Mail a Letter in the U.S.? (2025 Guide)
Wondering how much it costs to mail a letter in 2025? The USPS raised postage rates again, and we're here to break it all down. Whether you're sending a one-page letter, need certified mail pricing, or mailing something overseas, this updated guide covers every scenario — including mailing a letter online (guide).
Quick Answer: 2025 USPS Letter Costs
- $0.78 = 1 oz standard letter
- $1.07 = 2 oz letter ($0.78 + $0.29)
- $0.61 = Postcard
- $1.70 = International letter (1 oz)
Letters over 3.5 oz are priced as "flats" (large envelopes).
Complete 2025 USPS Mail Rates
Prices shown reflect USPS rates effective July 13, 2025 and may change. Always verify current rates before mailing.
| Mail Type | 2025 Price | Best For |
|---|---|---|
| First-Class Letter (1 oz) | $0.78 | Standard letters, bills, documents |
| Additional Ounce (each) | + $0.29 | Multi-page letters, thick documents |
| Metered Mail (1 oz) | $0.74 | Business bulk mailings |
| Postcard (Domestic) | $0.61 | Marketing, quick notes |
| Large Envelope/Flat (1 oz) | $1.63 | Catalogs, magazines, large documents |
| International Letter (1 oz) | $1.70 | Letters to other countries |
| Certified Mail Add-On | + $5.30 | Proof of delivery needed |
| Registered Mail Add-On | From $19.70+ | Maximum security, valuable items |
💡 Pro Tip: Forever Stamps are always valid for First-Class postage, regardless of future rate changes. Stock up when rates are lower!
Average Annual Stamp Price Increases
USPS postage rates have steadily increased over recent years. Here's how Forever Stamp prices have changed, showing the importance of buying stamps in advance:
| Year | Forever Stamp Price | Annual Increase |
|---|---|---|
| 2022 | $0.60 | — |
| 2023 | $0.66 | +$0.06 (10%) |
| 2024 (July) | $0.73 | +$0.07 (11%) |
| 2025 (July) | $0.78 | +$0.05 (7%) |
USPS implemented a mid-year increase on July 13, 2025 (Forever Stamp to $0.78). Historical data shows an average annual increase of 4-5%, with rate changes typically announced in advance.
Letter vs Postcard vs International: Visual Cost Comparison
Standard Letter
1 oz domestic
Postcard
Domestic postcard
International
1 oz international
Need help addressing your envelope? Check out our full guide on how to address an envelope.
FAQs: Mailing Costs and Postage
How much does it cost to mail a letter in 2025?
As of July 13, 2025, it costs $0.78 to send a standard First-Class letter (1 oz) within the U.S.
How many stamps do I need for 2 ounces?
You'll need $1.07 in postage — one Forever Stamp ($0.78) and one additional ounce stamp ($0.29).
How can I send a letter online?
You can prepare letters online using USPS.com tools or other services. Review current options and requirements at USPS.com.
How much does Certified Mail cost?
Certified Mail adds an extra fee on top of regular postage. Check current USPS pricing before you send. Learn more about Certified Mail costs.
How much is a book of stamps in 2025?
A book of 20 Forever Stamps costs $15.60 in 2025 (20 x $0.78 each).
Can I reuse old stamps?
Yes, Forever Stamps can be used regardless of when you bought them. They're always valid for First-Class postage.
What happens if I underpay postage?
The mail will be returned to sender or the recipient will need to pay the shortage plus a handling fee.
Related Questions People Ask
Stamp Values & Worth:
- • How much is a Forever Stamp worth? Always valid for First-Class postage ($0.78 current value)
- • Are old stamps still good? Yes, Forever Stamps never expire
- • How much is a roll of stamps? 100 stamps = $78 (2025 pricing)
Weight & Postage:
- • How many stamps for 3 ounces? $1.36 total ($0.78 + $0.29 + $0.29)
- • How many stamps for 4 ounces? Flat pricing applies; 4-oz flat = $2.50
- • Is it cheaper to mail online? It depends on the method and service level
Complete Guide Hub: Everything About USPS Mail
📝 Addressing & Formatting
📧 Certified & Tracked Mail
🖨️ Print & Mail Guides
Disclaimer: USPS rates accurate as of July 13, 2025 and subject to change. This guide is for informational purposes and isn't postal or legal advice. Verify current rates before mailing.
• Next review: January 2026