When to send wedding invitations, worked backwards from the only fixed date
Almost every guide gives you the same set of numbers and presents them as etiquette. They are broadly right, but they are built forwards from convention rather than backwards from the one date in the whole chain that you do not control. Getting the order of reasoning right makes the numbers make sense.
Start with your caterer, not your stationer
There is exactly one immovable date in this process and it is not your RSVP deadline. It is the day your caterer needs final numbers, usually somewhere between seven and fourteen days before the wedding. After that, changes cost money rather than effort.
Everything else is arithmetic from there. You need roughly two weeks between your RSVP deadline and that date, because a meaningful number of people will not reply on time and you will spend that fortnight chasing them. So the RSVP deadline lands three to four weeks before the wedding.
Guests then need four to five weeks between receiving an invitation and that deadline, which is where six to eight weeks before the wedding comes from. The convention is not arbitrary. It is what falls out of the caterer's deadline once you allow for human behaviour.
Ring your caterer and ask for their exact date before you order anything. If theirs is fourteen days rather than seven, your whole chain shifts by a week.
The timeline, in UK terms
Save the dates: 9 to 12 months before. Optional, but useful if your date is in peak season, near a bank holiday, or requires travel. Only send them to people you are certain you are inviting, because a save the date is functionally a commitment.
Order your invitations: 4 to 6 months before you plan to send them. Print lead times are longer than people assume, and anything bespoke or letterpressed is longer still.
Send invitations: 6 to 8 weeks before. The standard window for a UK wedding with mostly domestic guests.
RSVP deadline: 3 to 4 weeks before. Some venues suggest six to eight weeks, which is worth checking against their own final numbers policy rather than assuming.
Never send with less than six weeks notice. Below that, guests cannot reliably book time off, arrange childcare or sort travel, and your acceptance rate suffers for reasons that have nothing to do with whether they want to come.
Watch out for a genuine UK and US divergence on save the dates. British guidance generally says 9 to 12 months. American guidance, including Zola's, commonly says 4 to 6 months. Both are internally consistent with their own norms, but a lot of the advice ranking well is American. If you follow the shorter window for a UK summer wedding, you are sending save the dates after a lot of your guests have already booked their annual leave.
When to send earlier than eight weeks
If you skipped save the dates entirely. Push invitations out to 10 to 12 weeks, because the invitation is now doing both jobs and guests have had no prior warning.
Destination weddings. 10 to 12 weeks minimum, and pair it with an early save the date. Guests are booking international flights and accommodation, and the cost of that goes up the longer they wait.
Weddings near a bank holiday or in school holidays. Add a couple of weeks. Guests competing for the same annual leave and the same flights need more notice than guests driving twenty minutes on a Saturday in February.
The instinct to send very early to be safe works against you. Send four months out and the invitation goes in a drawer, the RSVP deadline feels distant, and you end up chasing more people than if you had sent it at eight weeks.
Make the RSVP easy or you will be chasing
The single biggest driver of late replies is friction. A card that must be posted back requires a guest to find a pen, find a postbox and remember, which is three chances to fail.
Give at least one route that takes under a minute. A wedding website with an RSVP form, a phone number, or an email address. Keep the reply card if you like the tradition, but do not make it the only option.
Put the deadline on the invitation itself rather than only on the website, and phrase it as a date rather than a duration. Please reply by 14 June is unambiguous. Please reply within four weeks is a calculation nobody will do.
Ask for everything you need in one go: attendance, meal choice, dietary requirements, and any accessibility needs. Going back a second time for dietary information doubles your admin and halves your response rate.
Assume the deadline will be missed
Some proportion of your guests will not reply by the date you set. This is not rudeness, it is how deadlines work when there is no consequence attached, and planning as though it will not happen is the mistake.
Build the chase into the plan rather than treating it as a failure. Diary a reminder for a few days after the deadline, then contact non-responders directly by whatever route they actually use. A text gets answered. A second formal card does not.
Give them a specific new date and mention the reason. We need to give the caterer final numbers on the 20th does more work than a general nudge, because it explains that the deadline belongs to someone else.
If someone still has not replied when your caterer's date arrives, they are a no. Say so kindly if it comes up later, and do not hold a seat on the assumption they will turn up, because that is how you end up paying for an empty chair.
One thing to check before you order
Confirm your venue's licensed rooms and your ceremony time before anything goes to print. Invitations carry details that are genuinely difficult to correct once posted, and a change of room or a shifted start time means either a reprint or an awkward round of individual messages.
It sounds obvious. It is also one of the more common reasons couples end up reprinting, because the invitation gets ordered off the back of a provisional booking rather than a confirmed one.
Tracking who has replied?
Kismet keeps your guest list and RSVPs in one place, holds unconfirmed guests separately from your seating plan, and sends reminders as your deadline gets closer.
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