By the mailbox
How Many Wedding Invitations Do You Need?
By Jared Waterworth · Updated June 10, 2026 · 5 min read
You don't invite people; you invite households. Count by envelope instead of by head and the order quantity — and the postage — finally makes sense.
The count
Order one invitation per household, not per guest (usually about 60% of your guest count), plus 10–15 extras for keepsakes and last-minute additions. For 150 guests that's roughly 85–95 invitations.
Skip to the numbers
Use the invitations calculator for your wedding.
The most common invitation mistake is ordering one per guest. You invite households, not individuals, so counting by headcount means buying — and addressing — roughly twice what you need. Here's how to get the count, postage, and timeline right, then let the invitation postage calculator tally the stamps.
Order by household, not headcount
A single invitation usually covers a couple or a whole family. The quick estimate is to divide your total guest list by the average number of guests per invitation:
- Households ≈ total guests ÷ ~2
Then order about 10% extra for keepsakes, last-minute additions, and the addressing mistakes that are inevitable when you're hand-writing dozens of envelopes. Order extra envelopes too — they're the part you're most likely to ruin, and ordering more later often means a second minimum print run.
Budget the postage
Stamps add up across more mailings than couples expect. Plan for:
- Outgoing invitations: one stamp each (square or over-1-oz invites need roughly double).
- Reply cards: a courtesy stamp on each so guests can mail them back.
- Save-the-dates: often cheaper at the postcard rate.
- Thank-you cards: one stamp each after the wedding.
Worked example: a 150-guest list
Run the numbers end to end:
- Invitations: 150 guests ÷ 2 = 75 invitations
- Add ~10% extra: order about 83
- Postage: at about $0.78 per stamp (the U.S. First-Class Forever rate as of mid-2026, rising to $0.82 in July 2026) across outgoing invitations, reply cards, save-the-dates, and thank-you cards, the total comes to roughly $234.
That single postage figure is easy to forget when you're focused on the design, so fold it into your stationery budget from the start.
The mailing timeline
Working backward from the wedding date:
- Save-the-dates: ~6 months out.
- Invitations: ~8 weeks out.
- RSVP deadline: ~4 weeks out.
- Final headcount to the caterer: ~2 weeks out.
That spacing gives guests time to respond and gives you a buffer to chase the stragglers before the caterer needs a number.
Weigh before you buy stamps
Postage depends on weight and shape, and a fully loaded invitation — inner envelope, reply card, details insert — can tip past one ounce or hit the square-envelope surcharge. Take one fully assembled invitation to the post office to weigh it before you buy a whole roll of stamps, so you don't end up with returned mail.
Build the count off your guest list
Every number here starts with an accurate guest list, so nail that down first. The guest list calculator helps you estimate how many guests will actually attend, which feeds straight into your household and postage counts.
One caveat on these numbers
The two-guests-per-invitation average and the timeline reflect common U.S. planning norms, and stamp prices change over time. Treat the totals as a starting estimate and confirm current postage rates with your local post office.
Frequently asked questions
How many invitations do I need for 150 guests?
Order by household, not headcount. With an average of about 2 guests per invitation, 150 guests is roughly 75 invitations. Add about 10% extra for keepsakes and addressing mistakes, so order around 83 — and order extra envelopes too.
Why order invitations by household instead of guest count?
One invitation usually goes to a couple or a family, not to each person, so ordering one per guest means buying roughly double what you need. Estimate households as total guests divided by about 2.
How much should I budget for invitation postage?
Plan an outgoing stamp per invitation (square or over-1-oz invites need roughly double), a courtesy stamp on each reply card, save-the-dates (postcard rate is cheaper), and thank-you cards. For 150 guests at about $0.78 per stamp (the U.S. First-Class Forever rate as of mid-2026, rising to $0.82 in July 2026) across all of these, postage runs around $234 — confirm the current rate before you buy.
When should I mail wedding invitations?
Working back from the wedding date: send save-the-dates about 6 months out, invitations about 8 weeks out, set the RSVP deadline about 4 weeks out, and give the final headcount to your caterer about 2 weeks out.
Sources
Last reviewed June 2026 by Jared Waterworth. Estimates use widely accepted wedding-planning rules of thumb — see how we estimate. Numbers vary by region, season, and vendor, so verify before you book or buy.