Is there a fee? If so, how much?

Yes, there is a 2.5% fee on the tax amount for credit cards and a flat fee of $2.50 for e-check. The fees post separately in your bank account. For example, if your taxes are $1,000 the convenience fee will be $25.00 for a credit card and $2.50 for an e-check. Fees are non-refundable for duplicate entries.