DTI Calculator NZ 2026

Your debt-to-income (DTI) ratio is one of the most important factors lenders consider when assessing your loan application. This ratio measures your ability to take on additional debt by comparing your current monthly debt payments to your gross monthly income. A lower DTI ratio increases your chances of loan approval, while a higher ratio may signal risk to lenders. Our DTI calculator makes it easy to determine where you stand. It calculates your ratio based on your gross monthly income, which is your earnings before tax (PAYE) and other deductions, and your total monthly debt payments, including mortgages, personal loans, credit cards, car finance, and other financial commitments. By dividing your total debt payments by your gross income, the calculator provides a percentage that represents your financial health in the eyes of lenders. A DTI ratio above 40 percent is typically considered high risk, meaning lenders may be hesitant to approve a loan or may offer higher interest rates. A lower DTI ratio, ideally under 30 percent, increases your chances of approval for mortgages, car loans, and personal loans with more favourable terms. If your DTI ratio is too high, there are ways to improve it. Reducing your monthly debt payments by paying off outstanding balances or increasing your income through salary growth or additional income sources can help lower your ratio and strengthen your financial position. Use our Debt-to-Income Ratio Calculator today to assess your borrowing capacity and take control of your financial future.

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