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Wedding Invitation Postage: How Many Stamps Do You Need in 2026?
Quick Answer: How Much Postage Do Wedding Invitations Need?
Most wedding invitations need more than one stamp. A standard rectangular invitation weighing one ounce mails for $0.82 — one Forever stamp. But most invitation suites are heavier, thicker, or square, and those start at $1.31 and climb. Here’s the 2026 cheat sheet:
| Invitation Type | 2026 Postage | Stamps Needed |
|---|---|---|
| Standard rectangular, ≤1 oz | $0.82 | 1 Forever stamp |
| Rectangular, ≤2 oz | $1.11 | 2 Forever stamps |
| Square or unusually shaped | from $1.31 | 2 Forever stamps |
| Thick/rigid suite (nonmachinable) | $1.31+ by weight | 2–3 Forever stamps |
| RSVP postcard (standard size) | $0.65 | Postcard stamp |
| RSVP card + envelope, ≤1 oz | $0.82 | 1 Forever stamp |
The only way to know for sure is to weigh and measure one finished invitation — sealed, stuffed, exactly as it will mail. The sections below walk you through the whole checklist.
Step 1: Weigh One Finished Invitation Suite
Everything inside the envelope counts: invite card, inserts, RSVP card, envelope, seals. Borrow a kitchen scale or use the self-service kiosk at a post office:
- Up to 1 oz: $0.82 — one Forever stamp
- Each extra ounce: add $0.29 (letters max out at 3.5 oz — beyond that it’s a “flat” or package)
A typical suite — invitation card, details card, RSVP card with envelope, in an outer envelope — runs 1–2 ounces. Add ribbon, wax seal, or vellum wrap and you’re firmly in 2 oz territory.
Step 2: Measure the Shape (This Triples the Price If You Miss It)
If your invitation is square, or lumpy, or rigid, it’s “nonmachinable” — and that starts at $1.31 even at one ounce. USPS automation can’t process it, so you pay a surcharge:
- Square envelopes: any side shorter than 6¼” after aspect ratio rules — $1.31 minimum
- Lumpy or rigid: bows, buttons, wax seals, thick cardstock — $1.31 minimum
- Clasps or strings: same surcharge
The vast majority of premium wedding suites are square or lumpy — which is exactly why “how much postage for wedding invitations” is such a common panic search. Budget for $1.31 per invitation, not $0.82, unless your suite is plain and rectangular.
Step 3: Price the RSVP Cards Separately
The RSVP inside your invitation doesn’t add postage — but the RSVP the guest mails back does, and you’re paying for it. Two options:
- RSVP postcard: $0.65 to mail back — cheapest, and the design is on you (nice photo on front works beautifully)
- RSVP card + envelope: $0.82 — guests need a stamp on it; etiquette traditionally says you provide that stamp, pre-affixed
Include the reply envelope’s pre-stamped weight in your invitation weight from Step 1.
Step 4: Don’t Forget Save-the-Dates and Thank-Yous
The full wedding mailing calendar usually runs four rounds of postage:
| Mailing | When | Typical Postage Each |
|---|---|---|
| Save-the-dates | 6–8 months before | $0.82 (postcard: $0.65) |
| Invitations | 8–10 weeks before | $0.82–$1.69+ |
| Thank-yous (shower gifts) | 2 weeks after shower | $0.82 |
| Thank-yous (wedding gifts) | 2–3 months after | $0.82 |
One engaged couple’s full paper trail often totals 300+ stamps across all rounds. That’s why buying them below face value moves the needle on a real budget line.
The Budget Math: 100 Guests, 2026 Rates
Take the most common scenario — 100 invitations, average 1.5 oz, square suites, RSVP cards with envelopes:
| Item | Stamps | At Post Office | Discounted Sheets | You Keep |
|---|---|---|---|---|
| 100 invitations (2 stamps each) | 200 | $164.00 | $50.00 | $114.00 |
| 100 RSVP envelopes (1 each) | 100 | $82.00 | $25.00 | $57.00 |
| 100 save-the-dates | 100 | $82.00 | $25.00 | $57.00 |
| Total | 400 | $328.00 | $100.00 | $228.00 |
Read that bottom row again: the same 400 genuine USPS stamps cost $228 less when bought as discount sheets. That’s the photography upgrade, the extra hour of reception venue, the welcome-party bar — real wedding budget, redirected from postage nobody remembers.
Browse wedding stamp designs here — sheets of 20 in themes that match invitation suites, from floral to commemorative. For very large guest lists, wholesale lots push the per-stamp price even lower.
When to Buy Your Wedding Stamps
Buy early, buy Forever. USPS raises prices nearly every year (the letter rate went to $0.82 in July 2026). A Forever stamp bought today still covers the full rate on your wedding day no matter what increases happen in between — mailing a rate-hike hedge into your own stationery budget.
Order at least 2–3 weeks before your mailing date. Stamps ship free and arrive within 3 business days, but weddings have enough hard deadlines without adding one.
Five Mistakes That Cost Brides Real Money
- Weighing the empty envelope. Stuff it first. Cardstock, vellum, and ribbon add ounces fast — every missing ounce’s worth of postage gets your invitation returned.
- Assuming “one stamp” because it looks like a letter. Square means $1.31 even at a half ounce.
- Forgetting the RSVP return stamps. You pay for both directions; 100 guests × $0.82 you didn’t budget is $82.
- Buying decorative postage at collector markup. A theme-matched genuine USPS design below face value beats a specialty “wedding stamp” at 3× face value. See our guide to verifying discount stamps.
- Metering invitations. Meter marks are ugly, expire, and can’t be bought ahead at a discount. Real stamps — especially themed ones — are part of the invitation’s look.
FAQ
How many stamps do I need for wedding invitations?
One Forever stamp only if the invitation is rectangular, under 1 oz, and flexible. Square, heavy, or lumpy suites need 2–3 stamps ($1.31–$1.69+). Weigh and measure one finished suite to be sure.
Can I put two Forever stamps on a wedding invitation?
Yes — two Forever stamps provide $1.64 of postage, which covers the $1.31 square/nonmachinable rate with room to spare for a second ounce.
How much is postage for 100 wedding invitations?
For standard 1 oz rectangular invitations: $82 at retail, or $25 if bought as discount sheets. Square or heavier suites cost more per piece.
Do I have to put a stamp on RSVP envelopes?
Etiquette says yes — a pre-stamped reply envelope gets you dramatically higher response rates. RSVP postcards ($0.65) are the budget-friendly version.
Can I use old Forever stamps for my wedding?
Yes. Forever stamps never expire and always cover the current rate, regardless of when or where you bought them.
Rates verified October 2026 (USPS First-Class Mail, effective July 12, 2026). Official price list: usps.com. For general postage math, see our Forever stamp quantity chart.
[…] invitations or holiday cards, or you want themed designs without paying collector markup. See our wedding invitation postage guide for how the math works on a large […]