If you're happy with the service your credit card processor provides, you should at least contact them once a year for a rate review. Every time I do that I get a rate decrease.
If you're in the market for a new processor there are a couple things to beware of:
- Know whether your old equipment will work (and whether you own it or are renting it). The equipment is expensive!
- Make sure the processor you go with is reputable and you know when they will fund. My vendor puts the money in my bank account next day. Some may take two days or more. I've heard of salons getting into serious cash flow problems because their credit card transactions had not funded yet.