debt service-to-income (DSTI) ratio

What is debt service-to-income (DSTI) ratio?

debt service-to-income (DSTI) ratio definition and meaning on Finance terms:
A measure of the amount of debt service payments relative to total disposable income. It is frequently used to assess the financial obligations of mortgage-indebted households and their ability to repay debt, and is useful for evaluating their vulnerability to changes in interest rates in countries with a high share of variable rate mortgages. <