What is the proper etiquette for giving a plus-one at a wedding?

A plus-one is a courtesy, not a right. Many couples invite their guests' partners by name when the relationship is long term. For shorter relationships, a named partner or a general plus-one can help a guest feel at ease.

Think about your venue size and budget first. A plus-one doubles the cost for one seat, food and favour. If you cannot afford everyone a plus-one, keep the rule fair. For example, invite all guests in long-term relationships by name, and leave others without a plus-one. Do not pick and choose randomly, or people will notice.

Be clear on the invitation and your website. Write 'and guest' only where you mean it. If you change your mind later, tell affected guests as soon as possible. Most people understand if you explain gently that numbers have changed.

Do not pressure guests to bring someone they do not know. Some prefer to come alone. Make it clear that solo attendance is perfectly fine.