Your ability to obtain a loan for a new home purchase is based on a number of factors. Lenders typically make lending decisions based on three key ratios: (1) Loan-to-value ratio (LTV), which represents the ratio of the loan amount to the value of the home. Lenders ideally want to see an 80% LTV, meaning a 20% down payment is preferred; (2) Housing Ratio, which represents the percentage of your total income that goes towards housing expenses; and (3) Debt-to-Income Ratio, which represents your total debt payments, plus housing expenses as a percentage of your total income. Lenders will typically look at any of these ratios as constraints, meaning once any of these ratio limits is reached, the amount of the loan will be capped.
Loans for more than 80% LTV (less than 20% down payment) are available, but they require mortgage insurance. Mortgage insurance payments are not included in the Monthly Payment shown above. The amount of mortgage insurance must be included to calculate your Housing Ratio and Debt-to-Income Ratio.