The Basic Plus-One Rules
Anyone in a committed relationship (married, engaged, or living together) should receive a plus-one. Members of the wedding party or event hosts should also get plus-ones. Beyond that, it depends on your budget and capacity.
How to Indicate Plus-Ones on Invitations
Be explicit. If someone gets a plus-one, say so clearly: "[Name] and guest" or "[Name] + 1." If they do not get a plus-one, address the invitation only to them. Ambiguity leads to awkward conversations.
When Guests Ask for Uninvited Plus-Ones
It is perfectly acceptable to decline politely. A response like "We'd love to include everyone, but unfortunately our venue capacity means we can only accommodate the guests named on the invitation" is honest and respectful. Do not make exceptions, as word will get around.
Consistency Is Key
Apply your plus-one policy consistently. If single friends in the wedding party get plus-ones, all single friends in the wedding party should. Inconsistency creates hurt feelings and awkward conversations.
The Children Question
Whether children are welcome is related to plus-one etiquette. If it is an adults-only event, state it clearly on the invitation: "We kindly request an adults-only evening." Provide this information early so parents can arrange childcare.