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How much more than my mortgage should I charge for rent?
I think you are trying to figure out what will be a break-even rental rate for you, so that then you can decide whether renting at current market rates is worth it for you. This is tricky to determine because future valuations are uncertain. You can make rough estimates though. The most uncertain component is likely to be capital appreciation or depreciation (increase or decrease in the value of your property). This is usually a relatively large number (significant to the calculation). The value is uncertain because it depends on predictions of the housing market. Future interest rates or economic conditions will likely play a major role in dictating the future value of your home. Obviously there are numerous other costs to consider such as maintenance, tax and insurance some of which may be via escrow and included in your mortgage payment. Largest uncertainty in terms of income are the level of rent and occupancy rate. The former is reasonably predictable, the latter less so.  Would advise you make a spreadsheet and list them all out with margins of error to get some idea. The absolute amount you are paying on the mortgage is a red herring similar to when car dealers ask you what payment you can afford. That's not what's relevant. What's relevant is the Net Present Value of ALL the payments in relation to what you are getting in return. Note that one issue with assessing your cost of capital is, what's your opportunity cost. ie. if you didn't have the money tied up in real estate, what could you be earning with it elsewhere? This is not really part of the cost of capital, but it's something to consider. Also note that the total monthly payment for the mortgage is not useful to your calculations because a significant chunk of the payment will likely be to pay down principal and as such represents no real cost to you (its really just a transfer - reducing your bank balance but increasing your equity in the home). The interest portion is a real cost to you.