These are a few tips to help you.

Contemplate your business needs: think about your target market. Does your business have a number of global clients? Then be sure the payment processor will be able to manage different countries without problems. Will you be taking paid ads on your website? Some payment processors like 2Checkout will not service advertising payments. Is your business beginning your business or established? look into start up costs and estimate your expenses to suit. You may want to use a no cost company like Paypal or a different Internet credit card processing company.
 

If you choose Paypal you should have a backup processor: pay pal is notorious for determining that you are in receipt of too many payments and just restricting your account. If you have a product which could be a chartbuster be wary and have a 2nd solution ready. This will also improve your integrity in your customer’s eyes and you will make more sales.
 

Read the fine print: make sure there are no hidden fees. Some creditcard processing companies will make everything look inviting in the beginning, but when you look deeper you will see that you have to pay unexpected every month. Worse still you may even have to pay more money when you make less than a certain quantity. If you are a new company you do not want to get trapped with this type of contract.
Make sure the business is not going to bind you in a yearly commitment. You don’t know what your position will be in 1 year or how good the new payment procesor will be. Try to find a payment processor that will let you cancel whenever you decide.

These are a few points to aid you.

Think about your particular needs: think about your market. Do you have a number of international clientele? Then be sure the payment processor will be prepared to service different countries without restrictions. Will you be taking paid ads on your website? Some payment processors like 2Checkout will not service advertising transactions. Are you a start up business or established? Check out initial fees and estimate your operating expenses accordingly. You may want to use a free company like Paypal or a different Internet credit card processing company.

Whatever you decide you should have a back up service provider: pay pal is renowned for making the decision that you are getting a lot of transactions and just freezing your account. If you have an e-book which could be a smash hit be wary and have a 2nd solution ready. This will also improve your credibility in your customer’s eyes and you will make more sales.

Pay attention to details: make sure there are no hidden fees. Some creditcard processing companies will make everything look alluring in the beginning, however when you look a little deeper you will understand that may incur some unexpected every month. Worse still you may even have to pay extra fees when you make less than a definite quantity. If you are a brand new company you do not want to get trapped with this type of contract.
Make sure the enterprise is not going to contract you in an annual agreement. You do not know what your position will be in one year or how trustworthy the new company might be. Try to find a payment service that will let you change at any time you want to.