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Christmas Card Postage 2026: How Many Stamps You Need (Plus USPS Holiday Deadlines)
USPS published its 2026 holiday deadlines on September 22, and the Forever stamp sits at 82¢ after July's increase. Here's exactly how much postage your Christmas cards need — and the mistakes that get them returned.
Every December the same thing happens. Thousands of holiday cards come back stamped “postage due,” or they arrive in January. Almost all of it traces back to two things people never check: the shape of the envelope and the weight of what’s inside.
USPS published its 2026 holiday deadlines on September 22, and the Forever stamp sits at 82¢ after July’s increase. Here’s exactly how much postage your Christmas cards need, when to mail them, and the mistakes that get them returned.
Christmas Card Postage at a Glance (2026 Rates)
These are the USPS prices that took effect on July 12, 2026.
| Type of holiday card | Postage needed | Stamps to use |
| Standard rectangular card, 1 oz or less | $0.82 | 1 Forever stamp |
| Standard card, over 1 oz up to 2 oz | $1.11 | 1 Forever + 1 additional-ounce (29¢) |
| Square card, 1 oz or less | $1.31 | 1 Forever + 1 nonmachinable (49¢) |
| Square card, over 1 oz up to 2 oz | $1.60 | 1 Forever + 1 additional-ounce + 1 nonmachinable |
| Oversized card mailed as a large envelope (flat) | $1.69 | 2 Forever + 5¢ |
| Holiday postcard (up to 4¼″ × 6″) | $0.65 | 1 postcard stamp |
| Card mailed outside the U.S., 1 oz | $1.75 | 1 Global Forever stamp |
For most families, that first row is the whole story. One Forever stamp covers a standard rectangular card weighing an ounce or less — and most single cards with a lined envelope land well under an ounce.
The rows below it are where the postage-due stickers come from. If you want the full weight-by-weight math for any letter, our guide to how many Forever stamps you need breaks down every scenario.
2026 USPS Holiday Deadlines: Last Day to Mail
USPS released its recommended send-by dates on September 22, 2026. Mail by these dates for expected delivery before December 25:
| Destination | USPS Ground Advantage | First-Class Mail (cards & letters) | Priority Mail | Priority Mail Express |
| Lower 48 states | Dec 17 | Dec 17 | Dec 18 | Dec 19 |
| Alaska, Hawaii, Puerto Rico, U.S. territories | Dec 16 | Dec 17 | Dec 18 | Dec 19 |
Cards travel as First-Class Mail, so December 17 is your date — Thursday, December 17, 2026.
Two groups need to start much earlier:
- Military addresses (APO/FPO/DPO): Ground Advantage by November 4; First-Class Mail and Priority Mail by December 9; Priority Mail Express Military by December 16.
- International: First-Class Package International Service and Priority Mail International by December 9; Priority Mail Express International by December 16. Customs processing abroad is outside USPS control, so add a week if you can.
One honest caveat: these dates are recommendations, not guarantees. USPS handled about 16 billion pieces between mid-November and early January last season. The practical move is to mail cards during the first week of December and treat December 17 as the emergency backup, not the plan.
The 49¢ Surcharge That Catches Most Holiday Cards
USPS letter-sorting machines need a rectangular envelope with a predictable shape. When a card fails that test, a nonmachinable surcharge of 49¢ is added on top of the weight-based postage — not instead of it. A one-ounce square card costs 82¢ + 49¢ = $1.31.
These are the triggers, according to the Domestic Mail Manual:
- Square or odd proportions. Length divided by height must fall between 1.3 and 2.5. A square envelope has a ratio of 1.0, so it always fails.
- Rigid contents that won’t bend — cards mounted on cardboard, wooden or metal keepsakes.
- Clasps, string ties, buttons or ribbon closures.
- Lumpy contents — a gift card, coins, keys or a pen that makes thickness uneven.
- Plastic wrapping or a non-paper exterior. Paper envelopes with windows are fine.
- Address written parallel to the short side, as on some vertical designs.
Here’s the expensive part. Most people reach for two Forever stamps on a square card. That’s $1.64 against a requirement of $1.31 — you overpay 33¢ on every single envelope. Mail 100 square cards that way and you’ve handed USPS $33 of postage that bought you nothing. The right combination is one Forever stamp plus one nonmachinable stamp, which USPS sells at exactly the 49¢ surcharge value.
The same arithmetic applies at scale to invitations. We covered it in detail in our wedding invitation postage guide.
How to Check Any Christmas Card in 60 Seconds
Do this once, and you’ve settled the postage for the entire stack.
- Assemble one complete card exactly as it will be mailed — every insert, the photo, the ribbon, the seal.
- Weigh it. A kitchen scale that reads in tenths of an ounce is enough. Under 1 oz means one Forever stamp covers the weight.
- Check the shape. Divide the length by the height. Between 1.3 and 2.5 passes. A 5″ × 7″ card has a ratio of 1.4 and passes; a 6″ × 6″ card does not.
- Do the bend test. If the envelope won’t flex, add the 49¢ surcharge.
- Count the extras. A photo or a plastic gift card holder usually pushes a card past 1 oz and often makes it lumpy — that’s two surcharges at once.
If you’d rather not do the math, weigh one assembled card at the Post Office counter and let the clerk confirm the total. It takes two minutes and it’s free.
What It Actually Costs to Mail Your Card List
The Post Office charges full face value no matter how many you buy — 82¢ each, 100 or 1,000. Here’s the difference using genuine discount Forever stamps:
| Cards mailed | At the Post Office (82¢) | With discount Forever stamps | You save |
| 50 cards | $41.00 | $12.50 (25¢ each) | $28.50 |
| 100 cards | $82.00 | $25.00 (100-stamp pack) | $57.00 |
| 500 cards | $410.00 | $75.00 (15¢ each) | $335.00 |
| 1,000 cards | $820.00 | $200.00 (1,000-stamp roll, 20¢ each) | $620.00 |
For churches, schools, real estate agents and small businesses mailing a few hundred holiday cards, that’s real money back in January. You can see the full breakdown of how much you can save on Forever stamps, and if you’re wondering whether discounted stamps are legitimate, here’s how to tell if discount Forever stamps are genuine.
Industry News: Holiday Package Prices Went Up — Cards Didn’t
On October 4, 2026, USPS added a temporary seasonal increase to Priority Mail Express, Priority Mail, USPS Ground Advantage and Parcel Select. It runs through January 17, 2027, and it adds anywhere from 50¢ to $20.80 per package depending on weight and distance.
Stamps, First-Class letters and Media Mail are not affected. Mailing a Christmas card in December 2026 costs exactly what it cost in July — 82¢. That’s worth knowing, because the headlines about “USPS holiday price increases” apply only to packages.
Looking further ahead, there may be one more change coming. In July 2026 USPS asked the Postal Regulatory Commission to move its annual mailing price increase from July to January, starting with January 2027, and projected roughly 4.5%. The PRC denied part of that request in August, which would limit any January change to an inflation-based adjustment of around 1.8%. As of late October, no January 2027 increase had been announced. Either way, discount stamps beat waiting for the next rate change — we track this in Forever stamps vs. rising USPS rates.
5 Mistakes That Get Holiday Cards Returned
1. Assuming every card takes one stamp
Square, rigid and oversized cards all cost more. Check one card from each design you’re sending — most people mail two or three different styles without realizing only one qualifies for the single-stamp rate.
2. Forgetting what you put inside
A photo, a gift card or a folded newsletter can push a card past 1 oz. That’s $1.11, not $0.82 — and if it also makes the envelope lumpy, add the 49¢ surcharge too.
3. No return address
If a card is underpaid or undeliverable, USPS can only send it back if there’s a return address. Without one it may simply be discarded.
4. Trusting a blue collection box on the last day
Collection times vary by box and by route, especially in December. If a deadline genuinely matters, hand the card to a clerk at the counter and ask for a postmark so you have proof of when you mailed it.
5. Throwing away old Forever stamps
Forever stamps never expire. A Forever stamp bought years ago at a lower price still covers a 1 oz letter today, and you never owe the difference. The only thing that changes the postage you owe is weight and shape — not when you bought the stamp.
Frequently Asked Questions
How many stamps do I need for a Christmas card?
One Forever stamp for a standard rectangular card weighing 1 oz or less, which covers most holiday cards. Square cards need an extra 49¢ nonmachinable stamp, and cards over 1 oz need an extra 29¢ per ounce.
Do square Christmas cards really need extra postage?
Yes. A square envelope can’t be oriented by sorting equipment, so USPS adds a 49¢ nonmachinable surcharge. A 1 oz square card costs $1.31 — one Forever stamp plus one nonmachinable stamp.
Can I just put two Forever stamps on to be safe?
It will be delivered, and for a 2 oz letter it’s the simplest option. But on a 1 oz square card, two Forever stamps ($1.64) overpay the $1.31 requirement by 33¢. On a 2 oz standard card they overpay by 53¢.
What is the last day to mail Christmas cards in 2026?
December 17, 2026 for First-Class Mail to anywhere in the U.S., including Alaska, Hawaii, Puerto Rico and the territories. Military APO/FPO/DPO mail is much earlier — November 4 by Ground Advantage or December 9 by First-Class Mail. International cards should go out by December 9.
Did USPS raise stamp prices for the 2026 holidays?
No. The temporary holiday increase that started October 4, 2026 applies to package services only. Forever stamps remain at 82¢ and First-Class letter postage is unchanged.
Do Forever stamps expire?
No. A Forever stamp is always worth the current 1 oz First-Class letter rate, no matter what you paid for it or when you bought it. You may have more questions answered on our discount stamp FAQ page.
Get Your Holiday Postage Sorted Early
Christmas stamps sell out at Post Offices every December, and the last thing you want is a January trip to the counter. Stocking up now means you can address cards the week they arrive instead of the week they’re due.
- Shop holiday and Christmas stamps — 100 stamps for $25 (25¢ each), including nativity, poinsettia, Hanukkah, Kwanzaa and Lunar New Year designs.
- Shop wholesale stamp rolls — 1,000 stamps for $200 or 2,000 for $300 (15¢ each) if you’re mailing more than a few hundred cards.
Sending cards abroad? A Global Forever stamp covers a 1 oz international letter at $1.75. And if you’re comparing sellers, here’s why discount stamp prices vary so much.
Rates and deadlines in this article are current as of October 23, 2026, based on USPS Notice 123 prices effective July 12, 2026 and the USPS holiday mailing dates published September 22, 2026.