I always procrastinate on my taxes — not out of anger at writing a check to the IRS (though I feel some) or a desire to put off unpleasantness (though I feel that too) — but because I want to wait for the best mileage offers to appear.

Several credit cards will offer bonuses for making tax payments with their card. These bonuses tend to offset the processing fee for paying taxes by credit card. I want to get the best bonus possible. Two years ago I took advantage of a United Visa offer of 5000 miles for any tax payment (I paid $5 online and the rest with a check). Last year I earned double Starwood points for my online tax payment. I haven’t heard what the credit card offers are yet — they usually appear around early March.

Last year I did my taxes online, which was cheaper than buying tax software and just as easy. I paid $20 to H&R Block for use of their web-based software, and earn 500 America West miles on top of it.

This year H&R Block already has an offer out with United – first time customers using an H&R Block office earn 1000 miles, and all customers earn 250 miles for doing taxes online.