Plus-ones are where a lot of guest-list tension lives. You want everyone to feel welcome, but you also have a venue capacity, a per-head catering cost, and a cousin who's been seeing someone for three weeks. The trick is deciding your rule early, applying it to everyone the same way, and then being kind but firm when the questions come.
Decide your rule before you write a single name
The single biggest cause of plus-one drama is making it up as you go. You offer one to Sarah because she asked, then you can't work out why you didn't offer one to Tom, and suddenly it looks like you're playing favourites. So sit down with your partner and agree a clear policy first.
Most couples land on some version of these tiers:
- Anyone married, engaged, cohabiting or in a long-term relationship gets their partner invited by name.
- Guests in a newer but real relationship get a plus-one if you've met the person, or if you've got the space.
- Single guests who'll know plenty of people at the wedding usually don't get a random plus-one.
The phrase to hold onto is "by name". If you know the partner's name, put it on the invitation. A guest is far less likely to ask for an extra spot when their actual partner is already invited.
Be honest about the numbers
Plus-ones aren't free, and pretending otherwise just makes the budget conversation harder later. Bridebook's UK wedding research has put the average cost per guest at well over £100 once you count food, drink and the rest, so twenty surprise plus-ones is a serious line item, not a rounding error.
Here's a rough way to think about what a blanket plus-one policy adds:
| Single guests offered a plus-one | Likely extra attendees | Rough added cost at £120/head |
|---|---|---|
| 10 | 6 to 8 | £720 to £960 |
| 20 | 12 to 16 | £1,440 to £1,920 |
| 30 | 18 to 24 | £2,160 to £2,880 |
Not everyone takes the offer, which is why the middle column is lower than the first. But you should plan for the higher end, not hope for the lower.
Word the invitation so the rule is obvious
Vague invitations create plus-one requests. Specific ones prevent them. The address line does a lot of quiet work here.
- For a couple: "Daniel Okafor and Priya Shah"
- For a guest plus a real partner you've met: "Hannah Wells and Guest"
- For a guest you're not extending the offer to: just their name, "Hannah Wells"
If you're sending digital invitations or pointing people to your wedding website, you can be even clearer. A short line such as "We've reserved seats for the names on your invitation" reads warmly and removes the guesswork. With Build The Day, your RSVP form only shows the spaces you've allocated to each guest, so people reply for exactly who's invited and nobody assumes an extra seat is going spare.
Handle the awkward asks gracefully
Someone will ask. Maybe a parent lobbying on behalf of an aunt, maybe a friend who's just started dating. Decide in advance how you'll respond, and keep it consistent.
A line that works: "We'd have loved to, but we're keeping the day to close family and friends, so we've had to draw the line at partners we've met. I hope you understand." It's honest, it's kind, and crucially it's the same answer you'd give anyone, which is what fairness actually means.
The one situation worth bending for is a guest who genuinely won't know a soul. Sitting someone alone among strangers for eight hours isn't generous, it's a bit lonely. If you can, give them a plus-one or seat them with a friendly group rather than at a table of couples.
Keep your guest list moving in one place
Plus-ones turn a tidy list into a moving target. People reply, then their partner can't come, then a name changes. Trying to track all that across texts and a scribbled spreadsheet is how you end up catering for the wrong number.
Keep one master list where each guest's allocated spaces, RSVP status and plus-one name all sit together. When the catering numbers are due, you want a single screen that tells you exactly who's coming, not a forensic search through your messages. Get the rule right at the start and the rest is mostly admin, which is a far nicer problem to have than a fairness one.
Header photo by Thomas William on Unsplash
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