Use the tool below to help you calculate an estimated down payment. Enter the price you expect to pay on your new home and then click your mouse in any of the total boxes and you’ll be giving an estimate for both good credit and not-so-good credit. The Expercent Loan Specialist in our loan division, GNM Home Loans, have over a hundred different loans programs including zero down payment loans. This tool is only meant to be a starting point. Please contact our loan division for detailed information tailored to your exact needs.