Frequent flyers can now earn points or miles for paying rent online with a credit card at http://www.williampaid.com even if your landlord doesn’t accept credit or debit card payments. To use the service and pay from a checking or savings account, you can choose from three rent payment packages: $4.15 a month, $10.60 for three months, $17.35 for six months or $29.95 for 12 months. On top of the payment package fee, an additional fee of 2.45 percent of the payment amount will be charged for using a credit or debit card to pay rent.

Bottom line: Before you whip out that plastic, consider this: at 2.45 percent of the payment amount, this fee can really add up. If your rent is $1,000 a month, you would be paying $24.50 (plus the rent payment package fee) to earn just 1,000 miles, which is only a little bit cheaper than buying miles directly from the airlines in most programs. If you were planning on buying miles, using williampaid.com to pay your rent for a few months may be a slightly cheaper way of acquiring a few thousand miles, but we don’t recommend using this service on an ongoing basis.