There is also a three-digit code number assigned to each currency, in the same manner as there is also a three-digit code number assigned to each country as part of ISO 3166. This numeric code is usually the same as the ISO 3166-1 numeric code.
This calculator uses these guidelines for determining how much house you can afford, which are similar to common underwriting criteria that mortgage lenders use. 1  Your total mortgage payment should be no more than 28 percent of your gross monthly income.
The pre-approval process will actually determine two things. First, the lender will determine if you're even qualified for a home loan. You must meet their minimum criteria for credit score, debt ratios, income, etc. If you meet these requirements, the lender will give you a maximum loan amount.