Dear Liz: I am selling a rental property that I have owned for several years. I know I could do a 1031 exchange, which would allow me to put off the tax bill by investing in another commercial property. But I just want out. I’ll pay the capital gains tax and invest the rest of the proceeds. I am considering paying the taxes by credit card and taking on the 3% premium to get rewards points offered through the card issuer. Is this a dumb idea, or does it have some merit?

Answer: The companies that process federal tax payments have processing fees of just under 2%, not 3%. You’ll still want to make sure you get more value from your rewards than you pay in fees, and that’s not a given. If your card offers only 1.5% cash back, for example, charging your taxes doesn’t make a lot of sense. But the math changes if you can get more than 2% in rewards, or if you could use the charge to help you meet the minimum spending requirements for a new credit card with a generous sign-up bonus.

If you do charge your taxes, you’ll obviously want to pay the balance in full before incurring any interest.