The fine print doesn't say what that fee is. For that, you have to call a toll-free number or visit a Web site, which are listed in the fine print. It turns out the fee is 2.5 percent of the taxes paid. Credit card companies say the charge is necessary because, by law, the IRS cannot pay any of the processing fees that stores and restaurants typically pick up when consumers pay by plastic. Whether the option makes sense for you depends on what you use the miles for.
Some commercials prominently note the fee.
Television and radio ads for Official Payments Corp., one of two firms the IRS has authorized to process tax payments made by credit card, clearly disclose the convenience fee. That's the fine print at the bottom of the promotion. If you read those terms and conditions carefully, you'll also learn that, unlike the tax payment, the convenience fee does not earn double miles. News Jobs AP Shopping Archives Entertain.