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Debt-to-Income Ratio: How to Calculate Yours and What It Means

Your debt-to-income ratio (DTI) is one of the main numbers lenders look at when you apply for a mortgage, car loan or other credit. It's also a useful number for you, because it shows how much of your income is already spoken for by debt before you buy groceries or save a dollar.

What Debt-to-Income Ratio Means

The Consumer Financial Protection Bureau defines DTI as all your monthly debt payments divided by your gross monthly income. "Gross" means before taxes and deductions, not your take-home pay.

DTI = total monthly debt payments ÷ gross monthly income × 100

How to Calculate Yours, Step by Step

1. Add up your monthly debt payments

Include the required monthly payment on:

  • Mortgage (including property taxes and insurance, if escrowed)
  • Car loans
  • Student loans
  • Personal loans
  • Minimum credit card payments
  • Other regular debt obligations, like child support, depending on the lender

Use the required minimum, not the extra you choose to pay. Everyday costs like groceries, utilities, phone and subscriptions generally aren't included.

2. Find your gross monthly income

Annual salary ÷ 12, or your pre-tax pay per period converted to a monthly figure. Your pay stub shows gross pay. (How to read your pay stub.)

3. Divide and multiply by 100

A Worked Example

Monthly debt payment Amount
Mortgage $1,500
Car loan $100
Other debts (card minimums, student loan) $400
Total $2,000

Gross monthly income: $6,000.

$2,000 ÷ $6,000 = 0.333, or a DTI of about 33%. This mirrors the example the CFPB uses.

Front-End vs. Back-End DTI

Mortgage lenders sometimes look at two versions:

  • Front-end (housing) ratio: only your housing payment divided by gross income. In the example, $1,500 ÷ $6,000 = 25%.
  • Back-end ratio: all debt payments divided by gross income, the 33% above. When people say "DTI," they usually mean this one.

What Is a "Good" DTI?

There's no single official cutoff. Different lenders and loan products set different DTI limits, and they weigh it alongside your credit history, savings and other factors. In general, a lower DTI gives you more flexibility, both with lenders and in your own budget.

A practical way to look at it for yourself: if a large share of your gross income goes to debt payments, there's less room for savings, surprises and goals, even if a lender would still approve you.

How Your DTI Affects Real Decisions

  • Buying a car: a new loan raises your DTI, which could affect a mortgage application later. (How much car can I afford?)
  • Renting: some landlords look at debts alongside rent-to-income. (How much rent can I afford?)
  • Consolidating debt: lenders check DTI before approving a consolidation loan.

How to Lower Your Debt-to-Income Ratio

You can lower DTI from either side of the fraction:

Reduce monthly debt payments

  • Pay off a small debt completely. Its whole payment disappears from the calculation.
  • Pay down credit card balances, which lowers minimum payments.
  • Avoid taking on new monthly payments before a big application.
  • Look at refinancing only if it genuinely lowers the payment without costly fees or a much longer term.

Paying off the smallest balance first is especially effective for DTI, because it removes a whole payment quickly. (Snowball vs. avalanche.) For a full plan, see debt payoff strategies.

Increase income

A raise, more hours or documented side income increases the denominator. Lenders usually want income to be stable and verifiable.

Frequently Asked Questions

Does rent count in debt-to-income ratio?

Rent usually isn't counted as debt in a standard DTI calculation, but when you apply for a mortgage, the new housing payment is included. Lenders' rules vary.

Is DTI based on gross or net income?

Gross (pre-tax) income, according to the CFPB definition.

Does DTI affect my credit score?

Income isn't part of your credit report, so DTI itself isn't a credit score factor. But the debts behind it, such as card balances, do affect scores.

A Number Worth Knowing Before You Need It

Calculating your DTI takes five minutes, and it gives you a clear view of how much of your income is committed to debt. Check it before any big borrowing decision, and watch it fall as you pay debts off.

My Money Map's debt payoff planner keeps every balance and minimum payment in one place, which makes this calculation easy to update.

This article is for general educational purposes and isn't personalized financial advice. Lender requirements vary.

Sources

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