Debt-to-Income (DTI) Ratio Calculator

DTI is the percentage of your gross monthly income that goes toward monthly debt payments. Lenders use it to assess your ability to take on additional debt. If you earn $7,500/month gross and your total debt payments are $2,250/month, your DTI is 30%. The lower the number, the more financially flexible you appear to lenders.

Below 36% is considered ideal. Up to 43% is acceptable for most conventional mortgages — that's the federal Qualified Mortgage threshold. FHA loans can sometimes go to 50% with compensating factors (high credit score, large reserves). Above 50% makes qualifying for most major loans difficult, and lenders may require you to pay down debt before approval.

It depends on which DTI: the front-end DTI (housing-only) includes just your housing payment; the back-end DTI (the one most lenders care about) includes ALL monthly debt — housing, auto, student loans, credit card minimums, personal loans, and child support or alimony. This calculator computes back-end DTI, which is the standard for mortgage qualification.

Required minimum monthly payments only. Include: mortgage or rent, auto loans, student loans, credit card minimums, personal loans, HELOCs, child support, alimony. Do NOT include: utilities, groceries, gas, insurance premiums (unless escrowed with mortgage), 401(k) contributions, taxes withheld, or subscription services. Discretionary spending doesn't count even if you regularly pay it.

Always gross (pre-tax) income. This is the standard lenders use because tax situations vary widely. If you're salaried at $90,000/year, your gross monthly income is $7,500. If you're self-employed, lenders typically average the last 2 years of tax-return income (line 31 of Schedule C or net business income). 1099 income usually requires 2+ years of history.

Two paths: increase income or decrease debt. Quick wins on the debt side: pay off credit cards or small personal loans entirely (eliminates the whole payment, not just reduces it), refinance high-rate debt into lower-rate debt, sell a financed car and replace with cash purchase. Income wins: ask for a raise, take on a second job (though lenders require 2 years of side income history to count it), or wait until your spouse can document their income.

The 43% cap comes from the Dodd-Frank Act's Qualified Mortgage rule. Loans above this DTI lose certain legal protections for the lender, making them riskier for the bank to issue. Some loan programs (FHA, VA, jumbo) have higher allowed DTIs with compensating factors. Non-QM loans can go to 50%+ but typically come with higher rates and stricter terms.

Yes — when applying for a mortgage, the new housing payment (principal, interest, taxes, insurance, and HOA fees if any) replaces your current rent in the calculation. This is your projected post-purchase DTI. Lenders calculate both: current DTI to assess your existing situation, and post-purchase DTI to verify you can afford the new loan.

DTI itself doesn't appear on credit reports and doesn't directly affect your FICO or VantageScore. However, the components that drive a high DTI — large credit card balances, multiple loan accounts — DO affect your credit utilization and account mix, which together account for nearly 40% of your credit score. So lowering DTI usually improves credit score as a side effect.

Sometimes. With excellent credit (760+), substantial cash reserves (6+ months of payments saved), large down payment (20%+), or a stable long-term job, lenders may approve DTI up to 50%. FHA loans are most flexible — they go to 50% with manual underwriting. VA loans for eligible veterans can sometimes exceed 50%. Expect higher rates and stricter scrutiny when DTI is above 43%.