On one of my rental properties, I pay electric & water. I pay the water using an rewards CC and usually debit on the electric. (electric charges $3 for CC). (HUD pays me a fixed amount on the utilities--I come out ahead). If I need to get to a spending threshold on a CC, I will prepay about 5-6 months of estimated electric bill ($1K or so) using a CC as $3 is trivial for that amount. (0.3%).