Months of supply is the measure of how many months it would take for the current inventory of homes on the market to sell, given the current pace of home sales. For example, if there are 50 homes on the market and 10 homes selling each month, there is a 5 month supply of homes for sale.

Months of supply is a good indicator of whether a particular real estate market is favoring buyers or sellers. Typically, a market that favors sellers has less than 6 months of supply, while more than 6 months of supply indicates an excess of homes for sale that favors buyers.

Months of supply is the inverse of absorption rate.