Aside from knowing how to address a wedding invitation to your single guest (see Bridaltrack.com’s easy format for that handy information), sometimes you have to decide if you have room for their “and Guest.”

Allowing single guests to bring a date can send your guest list and price tag up a bit more than you wanted, especially on a tight budget. If that’s a consideration for you, you aren’t alone. One of TheKnot.com’s readers asks about single guests also.

Another reader at Brides.com’s Wedding Advice section, had the following:

Q.
I’m inviting friends to our wedding whom I know do not have a significant other. Do I still have to include a guest on their invitations?

A.
Nope. You’re expected to invite the spouses, fiancé, live-in partners and serious beaus of your guests, but anyone less committed can fly solo. Just make sure that what you think of as “less committed” mirrors the sentiment of the guest that falls into that gray area, to avoid offending someone who’s fallen head-over-heels in the last three weeks. Ask a trusted friend if you aren’t positive about someone’s dating status. Rest assured that at least one or two of your single pals will call and ask about bringing a tag-along. If they do, tell them that you simply can’t accommodate any extra guests. If they refuse to come without a date, then so be it. Invite someone else who might turn out to be a better friend in the long run.

Plus, read a few more tips from Julie Dubin at ivillage.com’s wedding section who reminds us that people usually understand “that you can’t invite the world.”

The consensus seems to be that if your single guest is living with someone or in a long-term relationship, they should be treated the same as a “married” couple. Otherwise, they’re a solo act when it comes to invites.

After all, your near and dear ones, single or not, will certainly want to share the day with you, even if they are sans “and guest.”