8 unexpected business expenses you can put on a card

I can recall the day almost 10 years ago when I unwittingly discovered one of the most unexpected ways to earn points and miles that also made sense for our business.I was on a phone call with our national Coca-Cola account rep when the conversation took a turn to payment terms. That's when I learned we could charge all of our Coke flavor cartridges to a credit card with no fee.I did a double take. "There's no fee?" I asked.By the next morning, we were putting all of those purchases on a credit card. With 10 restaurants, that meant a significant amount of previously untapped credit card spending, and a lot more points and miles.Ever since, our team has made a habit of asking vendors whether they'll accept credit cards without a fee — and we've found opportunities in some surprising places.Of course, the math matters. Vendors can change their payment policies, and a typical 3% credit card surcharge can easily outweigh the value of the rewards you earn.But when the numbers work, you could be leaving a lot of rewards on the table by assuming a vendor won't take a card. Here are some business expenses you might be surprised you can charge to a credit card — and in some cases even earn ...