Debt-to-Income Ratio Calculator
Lenders will calculate this ratio for you eventually. Better to know it before an application puts it on record.
What This Calculator Does
Housing payment and total monthly obligations are each divided by gross monthly income to give the front-end and back-end ratios lenders underwrite. Both are measured against the traditional 28/36 benchmark, and the calculator then shows the extra room the stretch bands some programs allow — generally 43-50% — would open up.
Who Is This For
Buyers preparing for pre-approval, borrowers carrying student loans or car payments who want to see the impact, and anyone in Miami whose housing costs include association dues and Florida insurance premiums that lift the ratio further than expected.
How It Works
Provide gross monthly income, the housing payment you are targeting including taxes, insurance and association dues, and your other recurring monthly debt. Both ratios appear, along with where they sit against typical program limits.
Frequently Asked Questions
Where does the 28/36 rule come from?
It is the traditional benchmark: housing costs at no more than 28% of gross monthly income, all debt payments combined at no more than 36%. Conservative by current standards — and still the cleanest test of whether a payment is genuinely comfortable rather than merely approvable.
How far will lenders actually stretch?
Past 36%. Depending on the program and your compensating factors — reserves, credit profile, down payment — approvals commonly reach into the 43-50% band. Where you land inside it is a lender and program question rather than a rule you can look up.
Which obligations are counted as debt?
Recurring obligations appearing in your credit file: mortgage or rent, car payments, student loans, minimum credit card payments, personal loans, child support and alimony. Utilities, groceries, and general living costs do not count — which is why approvable and affordable are not the same word.
Which income will a lender accept?
Gross income before tax, documented and stable. Salary, self-employment income averaged over time, and a dependable bonus or commission history typically qualify. Income you cannot document the way the lender requires does nothing for the ratio, however real it is.
Why is my ratio worse in Miami?
Because the housing side carries property taxes, homeowners insurance, and condo or HOA dues — and in South Florida the last two weigh unusually heavily. Two identical incomes buying identically priced homes can land in different bands purely on insurance and association costs.
What improves it fastest?
Clear the smallest recurring payments rather than the largest balances, since the ratio counts monthly obligations and not total debt. Retiring one car payment shifts the number more than trimming a large balance does. And leave new accounts alone while you are in process.