When I read your question, I interpreted it as how much money do you need to write your earnest money deposit for. That varies by location. In this area, you can put down as little as $1000 in some areas, such as Prince Georges County, and in some price ranges. In other areas, such as Montgomery County, you'll need to put between three and five percent of the purchase price down. That money will be credited to your closing costs and down payment at settlement, and if you've paid more than you need, the settlement firm will rebate the difference back to you. If you're going after a low money down loan, you could probably put less down. If you're paying all cash, the seller would expect more. In a multiple offer situation, you'll need to put down more. Hope that helps.