We've never considered this regarding PTO, but I do have a small (very small) amount of knowledge from other areas. You probably need to talk to your bank. You need what is called a "merchant account" or a "merchant services account" to be authorized to accept credit cards. I'm not sure about the setup costs, but somewhere I heard $200-$300. There'a percentage fee on each sale, I think ranging from 2%-3%. With AmEx, it's taken out directly. That I see at work. If we charge a $100 fee and someone pays with American Express, we only get something like $97.10 in our account. With Mastercard and Visa, it hits a little differently - I'm not sure how as it doesn't hit my cost center directly.
I think any major bank could tell you what your options are.
Does anyone know the process or the fees associated with accepting charge cards? We are scheduling an Auction for our Winter event and it would be alot of high end merchandise. It would be really nice to be able to accept credit cards! Has anyone attempted this, and how did it go?