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Are there cons to paying monthly bills with a rewards card and then paying it off monthly?
There are a few potential downsides but they are minor: If you forget to make the payment the interest hit the following month could be significant. With many cards the new charges will be charged interest from the start if the previous payment was late/missed. Just make sure you don't forget to pay the entire bill. If the $5K in monthly bills is a large portion of the credit limit for that credit card you could run into a problem with the grace period. During the three weeks between when the monthly bill closes and the payment is due, new charges will keep rolling in. Plan on needing a credit limit for the card of 2x the monthly bills. Of course you don't have to wait for the due date. Just go online and pay the bill early. If the monthly bills are a significant portion of the total credit limit for all credit cards, it can decrease your credit score because of the high utilization rate.  The good news is that over time the credit card company will increase your credit limit thus reducing the downsides of the last two items. Also keep in mind you generally can't pay a credit card bill or loan with a credit card, but many of the other bills each month can be handled this way.