Can I Use Forever Stamps for International Mail?

Many households that stock up on Forever Stamps for domestic mailing eventually ask whether those same stamps work on an international letter, postcard, or greeting card. The good news is that USPS does accept Forever Stamps on international mail — but you need to understand how the face value applies, how many stamps to use, and when a dedicated Global Forever Stamp may be a simpler option.

How Forever Stamp Value Applies to International Postage

A domestic Forever Stamp is always worth the current First-Class Mail letter rate. Right now that value is $0.82. When you place a Forever Stamp on an international letter, the USPS treats it as $0.82 toward the total international postage required — just like applying a $0.82 postage meter impression or adhesive stamp.

This means if an international letter requires $1.55 in postage, you can affix two Forever Stamps ($0.82 × 2 = $1.56). The extra penny is simply absorbed by USPS — no penalty, no surcharge. In practice, this is the most common way people use Forever Stamps for international mail: they round up to the next whole stamp.

Current International Letter Rates

First-Class Mail International letter rates depend on weight and destination group. USPS assigns countries to pricing groups, though for a standard 1-oz letter the rate is fairly uniform. The table below shows approximate postage for common international letter weights:

Rates vary slightly by destination group and may change under the USPS price schedule effective July 12, 2026. Always verify the exact postage for your destination before mailing.

Domestic Forever Stamps vs. Global Forever Stamps

USPS sells a separate product called the Global Forever Stamp. It is designed specifically for a standard 1-oz letter sent to nearly any country in the world. The key differences are:

• Domestic Forever Stamp ($0.82): Covers domestic 1-oz letters. Can be used on international mail by combining multiple stamps. Value rises automatically if domestic rates increase.
• Global Forever Stamp (~$1.75): Covers a single 1-oz international letter in one stamp. Simple to use — one stamp, done. Its value adjusts if the international rate changes.

For a 1-oz international letter, either option works. The practical difference comes down to convenience and cost:

Using two domestic Forever Stamps is slightly cheaper than one Global Forever Stamp, though the difference is small. If you already own a supply of domestic Forever Stamps, there is no reason to buy Global stamps just for occasional international letters — combine what you have.

When It Makes Sense to Use Domestic Forever Stamps Internationally

Occasional International Mail

If you send international mail only a few times a year — a birthday card to a relative abroad, a holiday greeting to a friend overseas — using two or three domestic Forever Stamps is simple and cost-effective. You avoid buying a separate stamp category just for a handful of mailings.

Postcards

International postcards require less postage than letters. A single Forever Stamp ($0.82) covers most international postcards, making your domestic stamp supply even more useful for this category.

Wedding Invitations with International Guests

USPS rates effective July 12, 2026 should be treated as current, not as a future buying deadline.

• 20 international invitations × 2 Forever Stamps each = 40 Forever Stamps
• Cost at $0.82 per stamp: $31.20

Holiday Cards

Many families send holiday cards internationally. If you mail 15 international cards each December, you need roughly 30 Forever Stamps. Purchasing those stamps in advance — while the price is $0.82 — locks in your postage cost even if rates increase before the next holiday season.

Scenarios Where a Global Forever Stamp Is Better

A single Global Forever Stamp may be the better choice in specific situations:

• You mail international letters frequently and prefer one-stamp simplicity over affixing two or three stamps per envelope.
• You buy stamps only when you need them and do not keep a domestic supply on hand.
• The envelope layout does not comfortably fit two or three stamps in the upper-right corner (overstuffed envelopes, unusual sizes, or formal correspondence where a single stamp looks cleaner).

For most households, though, the domestic Forever Stamps already in a drawer are more than sufficient for international mail.

What Does Not Work: Common Mistakes

USPS rates effective July 12, 2026 should be treated as current, not as a future buying deadline.

Quick Reference: Steps to Use Forever Stamps on International Mail

1. Weigh your letter. A standard greeting card with a folded letter usually falls under 1 oz. Heavier mailings (photos, thick cards) may push into 2 oz or more.
2. Look up the international postage rate for your letter’s weight and destination on the USPS website or at your local post office.
3. Divide the required postage by $0.82 and round up to the next whole number. That is how many Forever Stamps you need.
4. Affix all stamps in the upper-right corner of the envelope. Stamps may overlap slightly if the envelope is small.
5. Include a return address and verify the international address format for the destination country before dropping the letter in the mail.