Inviting coworkers and their spouses

I would say it's rather awkward being single and showing up alone to a wedding. It's not fair to the single people, versus the dating or married ones. Even if they all know each other, it's still unfair to them.

If it was 2-3 of them I would say no big deal, but it's only one extra plate. I would just offer it. She may not use it.

I agree. Since it is one plate, I would allow her a date.

Do you regularly go out with all those couples and the one single coworker? If that's the case, and it won't be any different then situations when your out with her any way and I don't see why it would be a problem.

If you're worried about it, and its just one plate, I would extend the offer, she might not even use it.

If there is ANYTHING couple specific though, I would offer her a plus one. I went to a wedding last year that had a bunch of "grab your partner" group activities, and I had just gotten dumped, and it was awful.

If it’s only plate, I would just let her bring a plus one. I’m not sure how much she would enjoy being at a table full of couples at a wedding. If at least one or two of the other girls were single, it would be fine but it would be weird in this case. Not trying to be mean, but putting myself in her shoes, if I got invited without a plus one and knew I would be sitting with my four coworkers and their significant others, I would decline the invite.

I would also let her bring a date since it is only 1 coworker in this situation. Also, I'm glad you saw how rude it would be NOT to invite your coworkers' spouses. It doesn't matter if you know them or not. Every couple should be invited together because they are a social unit. Also, there is over a year before your wedding, it is possible this coworker will be dating someone. You must also extend an invitation to anyone she might be dating at the time your invitations go out. (This goes for anyone on your guest list.)

If it was multiple people without a +1, it would make sense... Just one girl, I would give her one. That's just awkward.

If one plate is going to break your budget, I would revisit the idea of inviting your co-workers at all. The general guideline is to only invite those co-workers with whom you have a social relationship outside work, Do you socialize with these people outside work? (work functions, lunches and drinks after work don't count).

You also have lots of time before your wedding. Everyone's status could change before then.