Debt-to-Income (DTI) Calculator – Affordability & Lending Eligibility
Work out your DTI ratio for mortgages and loans. Enter monthly income and payments to see your percentage instantly, with tips to improve it.
⚠️ Advisory only: Results are estimates. Lender policies vary; verify with your lender or a qualified advisor.

Calculate Your Debt-to-Income Ratio
Why Use This DTI Calculator?
Instant Debt-to-Income % Result
Automatically computes your ratio as you type.
Simple, Clear Input Fields
Add income and monthly debts with simple fields.
Supports Multiple Currencies
Works with £ / ₹ / € / $ — just keep units consistent.
Tips to Improve Your DTI Score
Guidance to lower your DTI over time.
DTI Calculation Process (3 Simple Steps)
Enter Total Monthly Income
Use gross monthly income (before tax).
Add Monthly Debt Payments
Loans, credit cards (min), car, student loans, alimony; include expected housing payment if assessing mortgage.
Review DTI % and Next Steps
See DTI %, then explore tips to reduce it if needed.
How to Use This Debt-to-Income Calculator
How Lenders Use Your DTI Ratio for Approvals
Your Debt-to-Income ratio compares your total required monthly debt payments to your gross monthly income. A lower DTI generally indicates more capacity to take on new debt. Lender limits vary by product and market, so use this figure as an orientation—not approval.
DTI Formula Explained (With Worked Example)
- DTI (%):
DTI = (Total monthly debt payments / Gross monthly income) × 100 - Convert annual to monthly income:
Gross monthly = Annual gross / 12 - What counts as monthly debt? Required payments like loans, car finance, student loans, alimony/child support, minimum card payments; optionally housing payment when evaluating a mortgage.
Worked example: Gross monthly income = £4,000. Monthly debts: Car £300 + Credit card £150 + Student loan £200 = £650 total.
DTI = 650 / 4,000 × 100 = 16.25%.
Typical guidance (varies by lender): Lower is better. Some products prefer < 35% and may cap around 40–45%. Always check the exact criteria of your lender and country.
DTI Calculator – FAQs
What Users Say About Our Financial Tools
This estimator feels like a mini financial advisor. It’s incredibly helpful for first-time buyers to understand their limits. The income-to-debt ratio logic is spot on.
This tool is a lifesaver for budgeting. It’s intuitive and gives a clear breakdown of monthly payments. I especially like the amortization summary—it’s great for planning long-term.
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