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Money & Finance

Debt-to-Income Ratio Calculator

Compare monthly housing and other debt obligations with gross monthly income. See housing and total ratios without assuming lender approval.

Private, in-browser calculationUpdated

Illustrative arithmetic using your assumptions. No personalized recommendation, eligibility decision or market forecast.

Let’s work it out

Enter your numbers. We’ll show the working.

Use one currency throughout; the country selector changes display only.
For a mortgage scenario, use the full housing amount required by the lender; do not add it again below.
Enter payments, not outstanding balances. Exclude the housing amount already entered.

How to use this calculator

  1. Convert income and obligations to the same monthly basis; use one household scope consistently.
  2. Enter housing once and add the required monthly payments on other debts.
  3. Review both percentages, then check the lender’s definition and a separate take-home budget.

The formula

Total ratio = (monthly housing + other monthly debt payments) ÷ gross monthly income × 100

The denominator is monthly income before deductions, not take-home pay. The housing share is also shown separately. You choose the obligations relevant to your comparison; lenders may apply different inclusion rules or income assessments.

PUTTING IT INTO PRACTICE

A worked example

Gross income of 6,000, housing of 1,500 and other monthly debt payments of 600 produce a 2,100 total. The total ratio is 35%, while housing alone is 25%.

How to interpret your result

A change in the ratio identifies a change in entered obligations relative to gross income. It cannot tell you how much is left after taxes, living costs and saving.

Assumptions and limitations

All amounts are monthly and in the same currency. Gross income must be positive. Ratios above 100% are allowed because obligations can exceed income.

This is not a universal lending test, Canadian GDS/TDS assessment, UK affordability assessment or Australian serviceability calculation. It does not infer permitted debts, income eligibility, thresholds or local housing costs.

Common questions

Should I enter debt balances?

No. Use required monthly payments for this ratio. A balance is a stock; the calculation compares monthly flows.

Is a particular percentage good?

There is no approval rule built into this tool. Lender, product, income assessment and country matter; consult the relevant requirements.

How do I convert weekly income?

For an annualized planning average, multiply weekly income by 52 and divide by 12. This is not the cash received in every calendar month.

Is rent included?

Include the housing amount that fits your purpose and clearly record it. A lender’s treatment of current rent and proposed housing payments may differ.

Sources

For informational purposes only. This calculator does not provide financial, tax, legal, or investment advice. Results are estimates.