Debt-to-Income (DTI) Ratio Calculator
Enter your income and monthly debts to see your front-end and back-end DTI ratio instantly — the same numbers mortgage lenders use to judge affordability.
Front-End Ratio
Back-End Ratio
Add your income
Enter gross (before-tax) income for each source, choosing yearly or monthly.
Add your debts
Fill in housing costs and other recurring debt payments — leave unused fields at $0.
Click Calculate
Your front-end and back-end ratios appear instantly, with a status label for each.
Compare to lender limits
Check your ratios against the conventional, FHA, and VA loan limits further down the page.
What is a Debt-to-Income ratio?
Debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward paying debts. It's calculated by dividing total monthly debt payments by gross (before-tax) monthly income. For example, someone earning $5,000 a month who pays $1,500 toward debts each month has a DTI of 30%.
DTI is closely related to, but different from, the debt-to-credit ratio (also called credit utilization) — that measure compares how much of your available credit you're using and directly affects your credit score. DTI, by contrast, is a cash-flow measure lenders use to judge whether you can comfortably take on a new payment.
Why DTI is important
Lenders — mortgage companies, credit card issuers, and auto lenders alike — use DTI to estimate the risk of extending credit to you. A high ratio suggests a larger share of your income is already committed to existing debt, leaving less room for a new payment if income drops or expenses rise.
Different lenders and loan types tolerate different ratios: a credit card issuer might approve someone at 45%, while a mortgage lender might cap approvals well below that. DTI is only one input into a lending decision, but it's usually a significant one.
Front-end vs. back-end ratio
Front-end ratio
Sometimes called the housing ratio, this divides your total monthly housing costs — mortgage or rent, property tax, HOA fees, and homeowner's insurance — by your gross monthly income. In the US, conventional mortgage lenders commonly cap this at 28%.
Back-end ratio
This is the broader, more commonly cited DTI figure. It includes everything in the front-end ratio plus all other recurring debt — credit cards, student loans, auto loans, and other liabilities. Conventional mortgage lenders commonly cap the back-end ratio at 36%.
House affordability & loan limits
In the US, DTI is one of the primary factors lenders use to determine how much home you can afford. Typical front-end/back-end limits vary by loan program:
| Loan type | Front-end limit | Back-end limit |
|---|---|---|
| Conventional | 28% | 36% |
| FHA | 31% | 43% |
| VA | 41% | 41% |
These figures are general guidelines rather than hard rules — individual lenders can be more or less flexible depending on credit score, down payment, and cash reserves.
DTI and financial health
Beyond lending decisions, DTI is a useful personal check on financial health. As a general rule of thumb, a DTI of around 33% or less is usually considered manageable, while a ratio of 50% or higher means at least half your income is going straight to debt — leaving little room for savings, emergencies, or other goals.
How to lower your DTI ratio
Increase income
Taking on overtime, a side job, or negotiating a raise raises the denominator of the ratio. If your debt stays flat while income rises, your DTI automatically improves.
Budget and cut expenses
Tracking spending against a monthly budget makes it easier to find room to pay down debt faster, which lowers the numerator of the ratio over time.
Make debt more affordable
Refinancing high-interest debt, negotiating a lower credit card APR, or consolidating multiple debts into a single lower-rate loan can reduce your monthly payment amount even before the balance is paid off — which improves DTI immediately.
Frequently asked questions
What's a good debt-to-income ratio?
Generally, 36% or lower is considered healthy for most lenders, with 43% often treated as an upper limit for mortgage qualification. Lower is generally better, but there's no single universal cutoff.
Does DTI affect my credit score?
Not directly — DTI isn't a factor in standard credit scoring models. However, high credit card balances relative to your limits (credit utilization) does affect your score, and that's a separate but related figure.
Should I use gross or net income?
DTI is calculated using gross (before-tax) income, which is why this calculator asks for pre-tax figures.
Does rent count toward DTI?
Yes — if you're renting, your rent payment is treated the same way a mortgage payment would be in the front-end ratio calculation.
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