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What Is Debt-to-Income Ratio and How It Works

Discover what debt-to-income ratio is, how to calculate it, what percentages banks use and how to plan your credit responsibly with step-by-step guides and free tools.

What Is Debt-to-Income Ratio?

The debt-to-income ratio is the maximum amount of monthly installments you can assume without putting your basic expenses, savings and financial stability at risk. It is not a single legal limit, but a reference used by individuals and financial institutions to decide if new debt is sustainable.

It is typically expressed as a percentage of your net income (30%, 35% or 40%) and is adjusted by subtracting debts you already pay. Knowing this number before applying for a personal loan or a mortgage helps you plan better and avoid financial problems. To learn how to calculate debt-to-income ratio step by step, consult our detailed guide.

How the Calculator Works

The Bryxo debt-to-income ratio calculator gives you three key results:

With this data, you can estimate how much capital you could finance based on term and rate.

The Basic Formula

Available Capacity = (Net Income × 0.30 or 0.35) - Current Debt Installments

This formula is based on the debt-to-income ratio (DTI), which is the indicator banks use to evaluate your profile. If you want to dive deeper into the debt-to-income ratio formula, we have a specific guide with detailed examples.

Example: net income 15,000, current debts 1,800, using 35%:

Monthly Net Income 15,000
Maximum Installment at 35% 5,250
Current Debts 1,800
Available Capacity 3,450

With 3,450 in available capacity, you can simulate loans in the personal loan calculator.

Importance Before Applying for Credit

Calculating your debt-to-income ratio before applying for credit has multiple benefits:

It is important that you know what debt-to-income ratio percentage is recommended according to your profile and financial situation.

You can check your result with the debt-to-income ratio calculator

Get your ratio, maximum installment and available capacity in seconds. No registration required.

Check Your Result

Calculate How Much Loan You Can Request Based on Your Salary

Estimate how much you can request based on your monthly income with our specific calculators by salary level:

Complete Guides on Debt-to-Income Ratio

Related Bryxo Tools

For complete financial planning, combine the debt-to-income ratio calculator with other Bryxo tools:

Continue Planning Your Finances

Once you know your debt-to-income ratio, the next step is to simulate the installment of the credit you want and organize your budget to ensure the payment is sustainable.

Frequently Asked Questions About Debt-to-Income Ratio

What debt-to-income ratio percentage is recommended?

As an educational reference, less than 30% is considered healthy; between 30% and 40% moderate; above 40% the margin is usually limited. 35% is the threshold most cited by banks and regulators.

How is debt-to-income ratio calculated?

It is calculated by multiplying net income by a reference percentage (30%, 35% or 40%) and subtracting current debt installments. The result is the available capacity for a new installment.

Why is it important to calculate it before applying for credit?

Knowing your debt-to-income ratio helps you avoid over-indebtedness, plan sustainable payments and improve bank approval odds by showing a responsible profile.

How do I know how much loan I can borrow?

First calculate your available capacity using the Bryxo calculator. With that maximum installment, the term and an estimated rate, you can project the maximum capital you could finance with the French amortization system.