This amount will also have to be no more than 41% of your total income when these other payments are factored in. Things like the cash needed for a down payment and closing costs are also factored into this amount, as well as your credit history. Basically, your lender will come up with the maximum amount that they would feel lending to you bases on your current income and your current expenses. If they feel as though you would be a very high risk because of your current expenses, they may reject your application completely, so make sure that the time is right when applying for a loan.