Debt-to-Income (DTI) Calculator
Debt service ratio, debt-to-income and loan-to-value from your income and loans
Loading the tool…
Calculates debt ratios from your income and loans: front-end and back-end debt-to-income, the debt service ratio (DSR), the Korean DTI and loan-to-value. With a limit you type in, it also estimates how much more principal would fit.
How to use
- Choose "Income entered as" and enter your "Gross income". For LTV, also enter the "Home value"; add "Other housing costs per month" such as property tax and insurance.
- Under "Your loans", enter each loan's "Type", "Balance or new amount", "Interest rate (annual)", "Time left" and "Repayment type". Use "Add a loan" for more.
- The ratios and bars appear on the right at once.
- Type limits under "Your own lines" and set the "Assumed new loan" to see the extra principal that would fit.
How it works
- Back-end DTI = (all monthly loan payments + other housing costs) ÷ gross monthly income; front-end DTI counts only the mortgage and housing costs. LTV = mortgage balance ÷ home value.
- Payments are the next 12 months of each loan's actual schedule. For an interest-only loan the principal is spread over a period you choose.
- No lender or legal limits are built in, and lenders count income and debts in their own ways, so their figures can differ.
Questions and answers
- How do I calculate my debt-to-income ratio?
- Add up your monthly debt payments, including housing, and divide by your gross monthly income. Payments of 2,000 on an income of 6,000 a month give a back-end DTI of 33.3%.
- What is the difference between front-end and back-end DTI?
- Front-end counts only housing costs: mortgage payment, property tax, insurance and similar. Back-end adds every other debt payment, such as car, student and personal loans.
- What is DSR?
- The debt service ratio is a year of principal and interest on all loans divided by a year of income. It is close to back-end DTI but leaves out non-loan housing costs.
- Does the estimate mean a lender will approve that amount?
- No. It is arithmetic based on the limit, rate and term you enter. Approval depends on the lender's own assessment.