To qualify for an FHA loan you will need to be able to put a minimum of 3.5 down, but in order to qualify for this minimum down payment, a minimum FICO score of 580 is required. If your FICO score is lower than 580, you will not be automatically excluded from eligibility, but a 10% down payment will be required. Your DTI can be as high as 50%. Your DTI ratio consists of all your monthly debt payments — including your new mortgage — divided by your gross monthly income.