Debt-to-Income Ratio (DTI) Calculator
Calculate your current front-end and back-end debt-to-income ratios.
Income
Monthly Housing Costs
Other Monthly Debts
Target DTI Ratios
How it works: The debt-to-income ratio compares your monthly debt obligations to gross monthly income. Front-end DTI uses housing costs only (PI + taxes + insurance + HOA + PMI), while back-end DTI includes all recurring debts. All calculations run locally in your browser for complete privacy.
Overview
Use this DTI calculator to measure both front-end debt-to-income ratio (housing only) and back-end debt-to-income ratio (all debts), the two numbers lenders often check during mortgage approval. Enter your gross income, mortgage or rent components (principal and interest, taxes, insurance, HOA, PMI), and other monthly debts such as auto loans, student loans, credit cards, personal loans, or support payments. You will get clear percentages, a color-coded status, and a transparent breakdown. Planning ahead? Switch to Required Income to see the monthly and annual income needed to hit a target ratio, or Max Housing to estimate a sustainable housing budget. The What-If mode lets you test how changes in income or debt affect approval-style thresholds. Everything runs locally in your browser for speed and privacy.
About
About Debt-to-Income Ratio Calculator
The debt-to-income ratio compares your monthly debt obligations to gross monthly income. Mortgage lenders and financial planners often look at both a front-end ratio (housing only) and a back-end ratio (housing plus all recurring debts). This calculator separates housing components (principal and interest, property taxes, homeowners insurance, HOA dues, and optional PMI) from other debts (auto, student, credit cards, personal loans, child support or alimony). Results are immediate and transparent, with editable targets so you can tailor the analysis to your situation. Because underwriting rules vary, use these numbers as planning estimates and confirm exact requirements with your lender or advisor.
Features:
- Calculate front-end DTI (housing costs only)
- Calculate back-end DTI (all monthly debts)
- Required Income mode to find minimum earnings for target DTI
- Max Housing mode to determine affordable housing budget
- What-If scenarios to test changes in income or debts
- Editable target percentages (default 28% front / 36% back)
- Color-coded status badges (green/amber/red)
- Detailed breakdown of income, housing, and debts
- Copy summary and CSV export
- 100% client-side calculation for complete privacy
What Is a Good DTI for Mortgage Approval?
Many conventional mortgage programs prefer a front-end DTI around 28% and a back-end DTI around 36%, though some lenders and loan programs allow higher limits. In practice, a lower DTI usually improves approval odds and can make it easier to qualify for better rates. If your ratio is too high, common ways to improve it include paying down revolving debt, increasing gross income, reducing the proposed housing payment, or waiting until an installment loan balance falls. Use this calculator as a planning tool, then compare the result with your lender's specific underwriting rules.
FAQ
What's the difference between front-end and back-end DTI?
Front-end DTI uses housing costs only (principal, interest, taxes, insurance, HOA, PMI) divided by gross monthly income. Back-end DTI includes housing costs plus all other monthly debts (auto, student loans, credit cards, personal loans, support payments) divided by gross monthly income.
Does this use gross or net income?
Calculations use gross monthly income to align with common DTI practices used by lenders and financial planners. Gross income is your total income before taxes and deductions.
Are utilities or groceries included?
No. Only debt obligations and housing items listed are included. Utilities, groceries, and other living expenses are not part of DTI calculations.
Can I enter rent instead of a mortgage?
Yes — place the total monthly rent in the Principal & Interest field and set other housing items (taxes, insurance, HOA, PMI) as needed or leave them at zero.
Are targets fixed?
No — you can edit the target percentages to your preference using the sliders. Common targets are 28% for front-end and 36% for back-end, but these vary by lender and situation.
What DTI ratio do I need for a mortgage?
Many conventional lenders prefer a front-end DTI below 28% and a back-end DTI below 36%, though FHA, VA, and other programs may allow higher ratios depending on credit profile, reserves, and compensating factors. Check with your specific lender for the rules that apply to your loan program.
How can I lower my DTI ratio?
You can lower DTI by increasing gross income, paying down monthly debt obligations, consolidating or refinancing to reduce required payments, or choosing a lower housing payment. Even small reductions in credit card minimums or auto payments can materially improve back-end DTI.
How do I use the Required Income mode?
Enter your housing costs and other debts, set your target DTI ratios, then switch to Required Income mode and calculate. The tool will show the minimum monthly and annual income needed to meet those targets.
What does binding mean in Max Housing mode?
Binding refers to which DTI target (front-end or back-end) is more restrictive and limits your maximum housing budget. The calculator shows both caps and identifies which one is binding.