Decide the number before you send, not after the reply arrives. If each household gets its own personal link, you can attach a number of places to that link, and their reply cannot go past it. The cousin who would have assumed four sees two, replies for two, and nobody has to have the conversation. The one condition is that they arrive on a link addressed to them. Somebody who comes in through the public version of your invitation has no allowance to hold them to, and picks their own number from a general range of one to twenty.
Nobody over-invites on purpose
Over-invitation is almost always a reading error, not bad manners. You wrote one name on an envelope. They read it as a household, because that is how invitations have worked in their family for forty years. Your cousin brings his partner, and her sister who is visiting, and the two children, and none of that felt like a liberty to him. It felt like turning up.
The awkward part is never the limit. It is the correction afterwards. Once someone has told their children they are coming to a wedding, you are not negotiating about seats any more. You are asking a family to undo a plan. That is the conversation worth engineering out, and the way to do it is to put the number in front of them before they form the picture in their head.
There is a practical deadline behind this too. Your caterer wants final numbers well before the day, and your venue has a capacity that does not move because your aunt is fond of her nephews. Every seat you never actually offered is a seat somebody else could have had.
Give each household its own number
The fix is to stop thinking about a single policy for the whole wedding and start thinking about one number per household. When you add someone to your guest list, you set how many places that invitation carries. Their personal link carries the number with it, and when they reply, the count stops there.
- A university friend coming on her own: one.
- A couple you have known for years: two.
- Your aunt, your uncle and the two children old enough to sit through dinner: four.
- A colleague you like but whose partner you have never met: one, and no explanation required.
Each number is attached to one invitation, not stamped on the guest, which starts to matter the moment you are running more than one event. The same household can sit at a different figure on each card. Four at the wedding, two at the family party. Calling a family a four once does not commit you to four everywhere their name appears.
What your guest actually sees
Very little, which is the point. Their invitation opens with their name on it and their reply form shows the number of places they have. The counter will not go above it. There is no field to type an ambitious number into and no message thread where the two of you negotiate. They confirm for the people they were invited with, and the count lands in your RSVP dashboard already correct.
This only holds on links you sent to a particular household, which is worth being clear about before you lean on it.
Deciding who gets how many
Work downwards from what you can seat, not upwards from the list. Take the capacity, subtract the households whose numbers are not negotiable (immediate family, the wedding party), and see what is left before you start being generous with anybody else.
The conventional rules of thumb for a plus one - and they are conventions, not findings - are that you offer one to anyone in a long-standing relationship, to the wedding party, and to a guest who will not know a single other person in the room. Beyond that it is your wedding and your judgement. Two habits keep the judgement defensible:
- Set every number in one sitting, before you send anything. Deciding household by household over three weeks is how you end up giving a friend’s new boyfriend a place you have already refused your cousin.
- Be consistent inside a group. If one aunt’s family gets four, the other aunt will hear about it, and you will be defending an inconsistency rather than a rule.
Changing a number after you have sent
Raising an allowance is the easy direction. Somebody’s partner turns out to be coming after all, you add the place, and because the code in their link never changes there is no second message to send. The extra seat is simply there the next time they open the form.
Lowering one is messier than it looks, because it does not reach backwards. Cutting a household from four to two sets the ceiling for the next answer they give; the four they already confirmed stays four on your list until they reply again. So the allowance quietly drops while the count does not, and the only thing that really settles it is a phone call. Which is the argument for fixing the numbers before the invitations go out rather than after.
When a seat limit is the wrong tool
Sometimes it is. If your families treat a wedding as an open invitation, where the village comes and the count is settled by how many chairs the hall holds, a per-household number will not hold the line and a reply form is a poor place to try. Set the allowance you can actually seat, then speak to the two or three people who will bring extras, because they are the whole problem and they will not be persuaded by a counter.
If your list is short enough that you know every household on it personally, you do not need a mechanism either. You need a handful of short conversations, and you were probably going to have them anyway. Seat allowances earn their place on long lists, on lists spread across several events, and on lists where the person replying is somebody you would rather not have to correct.
Frequently asked questions
Do I have to write no children on the invitation?
Usually not. If a household has two places and both of them are the parents, the invitation has already said it without saying it. If you would rather be explicit, put it once in your wording rather than repeating it in a reply to every family who asks.
What if a guest replies for more people than they have places?
On the personal link you sent them they cannot. The count stops at the number you set. Through the public version of the invitation they can, because a visitor arriving that way has no allowance to stop at, but that reply reaches you as a pending sign-up to approve or turn down.
Can the same family have different numbers at different events?
Yes. Every invitation holds its own figure for that household, so four at the wedding and two at the family party is an ordinary pair of numbers to set for one family.
Related: Guest list · RSVPs and replies