Net proceeds from a home sale are the total amount of money you walk away with after paying off the existing mortgage, closing costs and any other associated fees. This will be different for every home seller, even if they sell their home for the same price. If you sell your house for $300K, you will need to add up your closing costs, mortgage payoff amount, Realtor commissions and other fees, then subtract that total from $300K to determine your net proceeds.