When should we send the wedding invitations?

The mailing date looks like a matter of taste and is really a matter of arithmetic. At the end of the chain sits a date somebody else gives you: the day your venue or caterer needs a guaranteed number. Everything before it follows backwards from there.

This article works that chain through, names the situations where you have to mail considerably earlier, and describes what happens between the RSVP deadline and the final count. The wording of the card itself is a separate subject.

Six to eight weeks is not an arbitrary window. It is the point where two opposing forces balance out. Mail too early and the card sits in a pile for three months: guests reply late because the date feels distant, and the invitation disappears under the post. Mail too late and vacations are booked, childcare is spoken for and hotels are full.

In between sits the window where an invitation still feels urgent but guests can still shape their weekend around it. If you have already sent save-the-dates, you can comfortably use the lower end — the date is already blocked, and the invitation only has to deliver the detail.

Without save-the-dates, plan for eight to ten weeks. The invitation then does both jobs at once, and people reliably need longer to decide whether they can come than to fill in a reply card.

A second factor is who is on your list. A wedding attended mostly by people who live in the same city copes with six weeks easily. As soon as a meaningful share of your guests are older, harder to reach by message, or need help booking travel, every reply shifts later — and eight weeks becomes the safe choice.

In practice: for a wedding on 12 September, eight weeks before means 18 July. The print order would need to go out roughly two weeks earlier, and the artwork approval two weeks before that. Put those three dates in a calendar rather than in your heads; they are the ones that get lost between venue visits and menu tastings.

Count backwards from the wedding day, not forwards from today. It is the only way to notice when two steps collide.

Only the last row is genuinely fixed. Look up how many days before the wedding your guaranteed number is due, then set the RSVP deadline at least ten days earlier. Squeeze that gap down to three days and you will spend the final week phoning people.

Four situations move the window forward, and they move it by weeks rather than days.

• Destination weddings or weddings requiring a flight: three months, ideally four. Guests need flights, leave from work and sometimes a valid travel document.
• Holiday and long weekends: three months. Those weekends are the first ones your guests fill.
• Many guests with young children: ten weeks. Weekend childcare does not arrange itself in two weeks.
• Peak season at your venue's location: ten weeks, if guests need a room and the town sells out in summer. Hold a block of rooms and say so in the invitation.

There is almost no reason to mail later than six weeks out. One exception: a very small wedding among people who have all been told verbally. The card is then a confirmation rather than a question, and four weeks is enough.

In every other case, split the stack rather than moving the date for everyone. Overseas addresses, guests who are flying and anyone who needs a room get their invitation one or two weeks before the rest. Nothing changes for the printer and only the order changes at the post office; the work is entirely in sorting the list into two piles first.

The RSVP deadline belongs visibly on the reply card or the invitation, with a full date rather than a vague "as soon as possible". A share of your guests will only reply once a stated deadline has arrived.

Expect a quarter to a third of replies to be missing when the deadline passes. That is normal and not a sign of indifference. Plan a chasing round deliberately: one week after the deadline, by message or phone, one sentence, no reproach. Split the list between the two of you and it is done in an evening.

A prepared sentence helps, so you both use the same one: "Hi Maria — we're putting the table plan together and haven't heard from you yet. Could you let us know by Sunday whether you can make it? Absolutely no problem if you can't." It gives a reason, sets a new deadline and makes declining easy — the three things friendly chasers usually miss.

If you are working from a replacement list, send that second round no later than four weeks before the day. After that an invitation reads as exactly what it is. And if you collect replies online anyway, you skip transcribing reply cards and can see the running total at any point — a wedding website keeps that ledger while the card stays the thing that lands on the doormat.

Everything posted on the same day. Overseas addresses need a head start. Separate the stack and post international invitations one to two weeks earlier.

Mailing just before the holidays. An invitation that lands in an empty house in late July is read in late August. Move it forward, or behind the school break.

An RSVP deadline with no cushion. If the deadline falls on the day your caterer needs numbers, you have no room at all. Ten days is the minimum gap.

Checking addresses at the envelope stage. Missing addresses hold up the whole stack. Close the list four months out, not at the kitchen table on mailing night.

Forgetting the print lead time. Between approval and doormat sits a few days for digital printing and several weeks for letterpress. The mailing date is only realistic once the printing method is decided.

Leaving postage to mailing day. A full invitation with reply card, details card and envelope weighs more than you expect, and square envelopes attract a non-machinable surcharge in the United States and push you into Large Letter territory in the United Kingdom. Weigh one fully assembled sample before you buy stamps for the whole stack.