There's a quiet tension at the heart of wedding stationery: send too early and guests forget; send too late and they've already booked a city break. The right answer is narrower than you'd think, and the rules barely move between a twenty-person ceremony in a registry office and a hundred-and-fifty-person reception in a barn.
Here are the actual windows that work for UK weddings in 2026.
Save-the-dates — 6 to 9 months out
A save-the-date is a pre-commitment request. You're asking guests to block a date before you can give them the full details. That means you only need to send one if the full invitation is still months away, or if your date has meaningful logistical friction attached to it.
Send save-the-dates when: your wedding is on a bank holiday weekend; it's in summer holidays or half-term; it requires international travel; or a meaningful portion of your guests live abroad. Skip them if your wedding is in under six months or all guests are local — the formal invitation will be timely enough on its own.
Formal invitations — 8 to 12 weeks out
Formal invitations go out between eight and twelve weeks before the wedding. Earlier than that feels over-eager; later and guests have genuinely too little time to book trains, time off work, or childcare.
If you're doing both paper and digital invitations, send them on the same day. Guests who receive both appreciate the coherence; guests who receive only one shouldn't see friends mentioning an invitation they never got.
Destination weddings — add four to eight weeks
If your wedding is in another country — or in a remote part of the UK that requires a real journey — push both timings earlier. Save-the-dates should land nine to twelve months out, and formal invitations at the three-to-four-month mark. Guests need real time to book flights, arrange leave, and sort passports.
Include accommodation recommendations and rough travel notes in the formal invitation or on your wedding site. Removing the friction of logistical planning meaningfully improves attendance for destination events.
The RSVP-by date — four weeks before
Your caterer and venue will need final numbers two to three weeks before the wedding. Setting your RSVP deadline four weeks out gives you a week to chase stragglers and a safety margin before the supplier locks in.
Don't set it earlier than four weeks. Guests treat RSVP deadlines like tax returns — most respond in the final days, regardless of how long a window you give them. A longer deadline just means a longer period of uncertainty for you, not a higher response rate for them.
Digital, paper, or both?
Digital invitations (email plus a wedding site with an RSVP form) are now standard and entirely acceptable for any UK wedding short of the most formal. They're faster, cheaper, and easier to update if something changes.
Paper invitations still work for couples who want the ritual and keepsake, or for guest lists that skew older. Many couples do both: a beautiful printed piece for the day, plus a wedding website link where guests actually RSVP and find the details.
Edge cases
Short engagements (under four months): skip the save-the-date, send the formal invitation as soon as you've set the date, and set the RSVP deadline three weeks out rather than four.
Second weddings or low-key elopements: the formal etiquette still broadly applies, but feel free to be more casual. A well-written email six weeks out with a link to an RSVP form is entirely appropriate.
Big weddings (200+ guests): lengthen everything by two weeks. Larger guest lists take longer to respond and chasing them is a bigger job.
The simplest rule
Save-the-dates at nine months, invitations at ten weeks, RSVP deadline at four weeks. Adjust for distance and formality, ignore everything else. That's all the timing you need.