No part of wedding planning strains relationships like the guest list. The budget says 120; the combined families say 300. Someone has to blink.
The good news: a few honest rules, applied evenly, remove almost all of the awkwardness.
Start with the A/B list — quietly
List A is people the day wouldn't feel right without. List B is people you'd love to have if space allows. Invite List A early with a firm RSVP deadline; as declines arrive, invitations flow to List B with time to spare.
Digital invitations make this graceful — a List B guest gets the same beautiful, personal link, not a visibly late paper card.
One plus-one rule for everyone
Pick a line and hold it: partners in long-term relationships, yes; brand-new dates, no — applied to both families identically. The rule matters less than its consistency; unfairness, not strictness, is what people remember.
Let the RSVP itself do the asking. When a guest responds, they say whether they're coming alone, with a partner, or with family — and you see the real numbers instead of guessing.
The kids question
Adults-only is a perfectly good choice — if it's stated kindly and early. A single line on the invitation (“we love your little ones, but tonight is grown-ups only”) saves ten uncomfortable phone calls.
Cutting without guilt
A rule of thumb that survives contact with reality: if you haven't spoken in two years and they wouldn't recognise your partner in the street, they're a holiday-card friend, not a wedding guest. Your day, your table, your budget.