Do I need to pay for my Bridal Party's Mani/Pedi

You don't have to, you do if you can, it's a nice gesture but it's not something you have to do. I didn't pay for any of their stuff, I got them each a nice thank you gift, it was a clutch, they had to carry instead of a bouquet and they got to keep them.

Unless you require your attendants to have mani/pedis, you do not have to pay for them. To avoid the cost, you could give the women a choice as to whether to have mani/pedis, and/or allow them the option to DIY.

It's not required you pay for them however you can not require the bridesmaids get mani/ pedis if you don't pay for them.

Ditto. If you are not requesting it, you dont have to pay for it.

Good Idea!! I did get the girls really nice clutches. I also do not expect them to get the nails done I am okay with DIY. I guess I am just worried that they will think I am rude for not offering to pay for them.

Additionally all of these girls had a formal SPA day that they send out invites to. Because I am not paying for it should i do a more low key day at the nails salon? Maybe just mention to all my girls where I am going to get mine done and ask if they want to join me?

I am buying my girls jewelry because I made them buy their dresses that I wanted they had no say. So for their gift I am giving them the choice between a mani, pedi, or a massage the weekend before. If they want more than one they can pay for the rest. We are paying for most of the wedding ourselves so I know how it is.

Yes, you can ask them to join you, then again you gotta be clear because they might take it as an offer and you'll cover the cost, so just be clear. I didn't invite anyone to mine, au contraire, one of my BM offered to pay for my mani but i decline since she had already spent at least $300 on the wedding, plus she cooked for the bridal shower and brought 2 gifts for us.