The caterer wants a firm number. You only have partial RSVPs and a deadline three weeks out. Rule of thumb: about 20% declines on a mixed local / abroad list, sometimes higher in August (holidays).
Simple model
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100 invited → expect ~80 attending, ~20 out
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70% RSVP return: extrapolate, do not treat silence as « yes »
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Caterer buffer: +2–3 covers for last-minute fixes
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Day-of no-shows: 1–3% on confirmed list (plan without massive over-order)
Never confirm 100% of « yes » to the caterer if your RSVP deadline has not passed. See follow-ups. At ~80% confirmed, start the seating chart. Adjust by profile
Mostly local list: declines closer to 10–15%.
Many overseas guests or summer date: plan for 25%.
Recount at D-14 after nudging the silent ones.
How Fiancé can help
Fiancé's guest list handles RSVP, plus-ones, children, and dietary needs. The public page lets guests reply without creating an account. Nudge from the app and track who received save-the-dates, invitations, or menu choices. Every extra guest adds up: stress-test your cap with the budget calculator. Disclaimer
Please be advised that the contents of this article are intended for general information purposes only and not professional advice. The information contained herein is for informational purposes only. Nothing herein shall be construed as legal, financial, or tax advice. The content reflects the opinions of the author and/or the Drakkar Software team. Drakkar Software does not guarantee any particular outcome.
About the author
Camille
Budget, guests & seating expert