Money Calculators
Use this DTI calculator to compare monthly debt payments against gross monthly income before taking on a mortgage, rent payment, car loan, personal loan, or credit card payoff plan.
Live calculator
Total monthly debt divided by gross monthly income.
Housing payment divided by gross monthly income.
$2,570.00 in monthly debt payments entered; taxes and payroll deductions are not subtracted.
Lenders use their own rules. These are planning ranges, not approval thresholds.
| Back-end DTI | Planning read |
|---|---|
| Under 36% | Often considered easier to manage |
| 36% - 43% | May still qualify, but budget pressure rises |
| 43%+ | Often needs closer review before adding debt |
Use this as a debt-to-income planning estimate. Gross income, required monthly payments, housing costs, credit report details, and lender or landlord rules can change how the ratio is interpreted.
Quick answer
Debt-to-Income Ratio Calculator calculates front-end DTI from housing payment and back-end DTI from housing, auto loans, student loans, credit cards, and other monthly debts divided by gross monthly income. Use it before adding a mortgage, rent payment, loan, or payoff plan.
Formula
Back-end DTI = total monthly debt payments / gross monthly income x 100Front-end DTI uses housing payment only. Back-end DTI includes housing plus other recurring monthly debt payments.
How to use
Example
Calculator use
Before relying on it
Details
These notes make the assumptions explicit, especially where the same search query can mean slightly different things.
Debt-to-income ratio is usually calculated before taxes and payroll deductions. Gross income after listed debts is not take-home pay, so actual cash flow may feel tighter than the DTI percentage suggests.
Include housing, auto loans, student loans, personal loans, minimum credit card payments, and similar obligations. Do not mix one-time expenses into DTI unless you convert them to a monthly debt payment.
Front-end DTI looks at housing only. Back-end DTI includes housing plus other monthly debts, which is usually the more useful pressure check.
After checking DTI, use the mortgage calculator for a specific payment, mortgage affordability for shopping range, mortgage-vs-rent for housing choice, and loan or payoff tools for debt changes.
Source notes
Benchmarks
The calculator is a decision aid, not a fixed rule. Use the output to compare scenarios and document your assumptions. Benchmark ranges are broad planning heuristics unless this page names a specific source for the range.
Often easier to manage in a monthly budget, depending on expenses.
May still be workable, but budget flexibility can shrink.
Usually worth reviewing debts before adding another payment.
Calculator accuracy
The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.
Back-end DTI = total monthly debt payments / gross monthly income x 100
Gross monthly income, Current or proposed housing payment, Auto loans, Student loans, Credit cards, Other monthly debts
DTI results divide the required monthly debt payments you enter by the gross monthly income you enter. They do not check credit reports, underwriting rules, cash reserves, living expenses, local rent standards, or loan approval criteria.
June 6, 2026
Toolkit Shelf. Debt-to-Income Ratio Calculator. Last reviewed June 6, 2026. https://toolkitshelf.com/tools/debt-to-income-ratio-calculator
FAQ
Debt-to-income ratio compares monthly debt payments with gross monthly income. It helps show how much income is already committed to debt.
Front-end DTI is housing payment divided by gross monthly income. It does not include other loan or credit card payments.
Include recurring monthly debt payments such as mortgage or rent, auto loans, student loans, minimum credit card payments, personal loans, and similar obligations.
No. Lenders can also review credit, assets, reserves, loan program rules, property details, income documentation, and other underwriting requirements.
Most lender-style DTI comparisons use gross monthly income, but budgeting comfort should also be checked against take-home pay and real living costs.
Include required monthly debt payments such as mortgage or rent if the scenario calls for it, auto loans, student loans, minimum card payments, support obligations, and other recurring obligations.