What Is a Debt-to-Income Ratio?
Your debt-to-income ratio, or DTI, compares how much you owe each month to how much you earn before taxes. It is written as a percentage, and lenders lean on it heavily whenever they decide whether to approve a mortgage, an auto loan, or a new credit card. A lower percentage tells a lender that a smaller slice of your paycheck is already spoken for, which generally makes you a safer bet to repay a new loan on top of your existing bills.
There are two versions of the ratio that matter for most borrowers: the front-end ratio, which only counts housing-related costs, and the back-end ratio, which adds every other recurring debt on top of housing. Mortgage lenders in particular look at both numbers side by side, since a household can look fine on one measure while stretched thin on the other.
Why Does This Number Matter?
Beyond loan approvals, tracking your own DTI is a quick, honest gauge of your household's financial breathing room. As a rule of thumb, a ratio near or below one-third of income is usually considered comfortable, while a ratio approaching half of income leaves very little room for savings, emergencies, or a drop in earnings.
How to Use This Calculator
1. Choose your currency from the dropdown — the calculator supports US Dollars, Euros, Hungarian Forint, and several others, so figures display in the currency you actually budget in.
2. Enter every source of income before tax: salary and wages, pension or social security, investment income, and anything else you receive regularly. Select whether each figure is a monthly or yearly amount.
3. Enter your recurring debts and housing costs: rent or mortgage, property tax, HOA fees, insurance, credit cards, student loans, auto loans, and any other loan payments.
4. Press Calculate. The tool instantly converts everything to a monthly basis and shows your front-end ratio, back-end ratio, and total monthly gross income, along with a colour-coded indicator of how healthy each ratio is.
5. Press Clear at any time to reset every field and start over.
Example Calculation
Suppose someone earns 600,000 Ft a month in salary and pays 150,000 Ft in rent plus 40,000 Ft toward a credit card each month, with no other income or debt.
Monthly gross income: 600,000 Ft
Front-end ratio: 150,000 ÷ 600,000 = 25%
Back-end ratio: (150,000 + 40,000) ÷ 600,000 ≈ 31.7%
A back-end ratio of roughly 32% sits close to the commonly used 36% back-end guideline, meaning this household still has a modest amount of room before most lenders would consider its debt load too high.
How to Lower Your DTI Ratio
Grow your income. Overtime, a raise, a side project, or a second job all raise the denominator of the ratio without touching your debt, which pulls the percentage down.
Trim recurring expenses. Reviewing a budget line by line often reveals subscriptions, dining, or discretionary spending that can be redirected toward paying down balances faster.
Make existing debt cheaper. Calling a credit card issuer to ask for a lower rate, or consolidating several high-interest balances into one lower-interest loan, reduces the monthly payment that feeds into your ratio.
Frequently Asked Questions
What counts as income in this calculator?
Any regular, pre-tax inflow: salary or wages, pension and social security payments, investment or savings income such as dividends and interest, and other recurring income like alimony or gifts. One-time windfalls are usually left out since they don't reflect ongoing repayment ability.
What is a good DTI ratio?
Most conventional mortgage lenders look for a front-end ratio no higher than 28% and a back-end ratio no higher than 36%, though government-backed programs sometimes allow more. Outside of lending, keeping your overall DTI at or below one-third of income is a common personal-finance target.
Does this calculator store or send my financial data anywhere?
No. Every calculation runs directly in your browser using plain JavaScript. Nothing you type is transmitted to a server, saved, or shared — closing or refreshing the page clears it completely.
Can I use this with Hungarian Forint or another currency?
Yes. Pick your currency from the dropdown at the top — Forint, US Dollar, Euro, British Pound, Pakistani Rupee, and several others are built in — and every figure and result will display with that currency's symbol.
Why do I have two ratios instead of one?
The front-end ratio isolates housing costs, which is what a mortgage lender cares about most, while the back-end ratio reflects your full debt picture. Looking at both gives a more complete view than either number alone.