Wedding Invitation Postage: Complete Guide
Invitation postage is determined by the finished envelope, not by the number of cards. Assemble one complete sample before ordering stamps for the entire guest list.
Build and Test One Finished Invitation
- Assemble the invitation exactly as it will be mailed, including liner, details card, reply materials, ribbon, pocket, seal, and outer envelope.
- Seal it before measuring length, height, thickness, and weight.
- Check flexibility, uniform thickness, address orientation, and other nonmachinable criteria.
- Find the weight-based letter amount, then add a surcharge if the finished piece qualifies as nonmachinable.
- Approve one final sample before ordering postage for the guest list.
July 2026 Domestic Letter Examples
| Finished invitation | Machinable | Nonmachinable |
|---|---|---|
| Up to 1 oz | $0.82 | $1.31 |
| Over 1 oz through 2 oz | $1.11 | $1.60 |
| Over 2 oz through 3 oz | $1.40 | $1.89 |
| Over 3 oz through 3.5 oz | $1.69 | $2.18 |
These figures apply only while the piece remains a qualifying domestic letter. International invitations, flats, and parcels use different rules.
Complete Wedding Order Example
Assume a couple has 120 U.S. mailing addresses. Their finished invitation weighs 1.6 ounces, remains flexible and rectangular, and has no nonmachinable characteristic. Each outbound piece therefore needs $1.11. They also include 90 physical RSVP envelopes for U.S. recipients; the other 30 guests reply online. Each qualifying one-ounce RSVP envelope needs $0.82.
| Piece | Count | Postage each | Total postage |
|---|---|---|---|
| Outbound 1.6 oz invitations | 120 | $1.11 | $133.20 |
| Physical RSVP envelopes | 90 | $0.82 | $73.80 |
| Planned postage | 210 pieces | $207.00 |
If the couple keeps five replacement outbound sets and five replacement RSVP envelopes, the allowance adds $9.65, bringing the planning total to $216.65. International addresses, changed components, or a nonmachinable result must be calculated separately rather than averaged into this example.
Count Addresses, Replies, and Replacements Separately
Order one outbound set per mailing address, not per invited guest. Add postage only for physical reply envelopes that will actually be mailed. Then keep a modest replacement allowance for addressing mistakes, lost pieces, or damaged envelopes. Recheck stock and delivery time if a specific design is important.
Frequently Asked Questions
Should the complete invitation be tested before stamps are purchased?
Yes. Weight and machinability can change after liners, cards, pockets, ribbons, seals, and the outer envelope are added.
Does every RSVP envelope need a stamp?
A physical reply envelope normally needs appropriate return postage; guests replying online do not need a mailed reply envelope.
Does every wax seal require the surcharge?
No. Evaluate the seal's effect on the completed envelope's rigidity, thickness, and uniformity.
How should international guests be counted?
Separate them from the domestic example and calculate the outbound and return arrangements for each destination.
After testing a complete invitation sample and calculating the full quantity, shop postage stamps for invitations by postage category, design, and package size.
Sources and Scope
- USPS Notice 123 for retail prices effective July 12, 2026.
- USPS Domestic Mail Manual 101 for letter dimensions and nonmachinable criteria.
- USPS Postage Price Calculator for destination-specific checks, including international pieces.
The quantities and mailpiece characteristics in the worked wedding example are hypothetical. Test the actual finished invitation.