Transaction fees do vary between merchants, and so it is important to check. As a ballpark figure, transaction fees vary between 1.6% and 1.75%. Some providers are as high as 2.75%, but within this transaction fee will be other costs that you may pay for separately. Providers also have packages from time to time to entice new business customers. PayPal, for example, have a sliding scale when it comes to transaction fees. The higher the sales volume, the lower the transaction fee. It can fall as low as 1%, the tool they use to entice customers and to encourage businesses to put as many transactions through the system as possible.