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.
A mortgage pre-qualification can be useful as an estimate of how much you can afford to spend on your home, but a pre-approval is much more valuable because this means the lender has actually checked your credit and verified your documentation to approve a specific loan amount (usually for a particular time period such as 90 days).