Should you give a plus-one to a guest who is married or engaged?

Married and engaged couples are usually treated as a social unit, so it would be rude to invite one without the other. The same applies to partners who live together or have been together for a year or more. If you are working to a tight budget, still try to include these partners, because excluding them can cause real offence. For guests who are single or casually dating, you can choose not to offer a plus one, and that is widely accepted. If you cannot accommodate a partner for a genuine reason, such as venue capacity, speak to the guest personally and explain kindly. Do not put it in writing on the website. Offer a compromise, such as inviting the partner to the evening reception only, if that works for you. Remember that your guest may decline if their partner cannot come, and that is their choice. Being fair and consistent with your plus-one policy will avoid hurt feelings.