Interest-Only Mortgages: When They Make Sense and How They Work in 2026

Interest-only mortgages carry an unfair reputation shaped by their misuse before the 2008 financial crisis. Used correctly for the right borrower in the right scenario, an IO loan structure is a legitimate financial tool with real advantages.

How Interest-Only Loans Work

A standard fully amortizing mortgage applies each payment to both interest and principal, gradually reducing the loan balance over 15, 20, or 30 years.

An interest-only loan has an initial IO period — typically 5 to 10 years — during which your payment covers only interest. You make no contribution to principal. After the IO period ends, the loan converts to a fully amortizing schedule for the remaining term, which results in a meaningfully higher payment than during the IO period.

Who IO Loans Are Designed For

Real estate investors focused on maximizing cash flow during a hold period and planning to sell before the IO period ends. High-income earners with variable compensation — commissions, bonuses, equity distributions — who want lower required minimum payments but can and will pay down principal when cash flow allows. Buyers in strong appreciation markets building value through price growth rather than equity paydown.

The Risks to Understand

You build no equity through principal paydown during the IO period. When the IO period ends, your payment increases substantially and may create affordability stress. If values decline, you may owe more than the property is worth. Refinancing out of an IO loan requires sufficient equity and qualifying income.

IO Loans for DSCR Investors

Interest-only DSCR loans are popular with cash-flow-focused investors because the lower IO payment improves the DSCR ratio and cash-on-cash return compared to a fully amortizing structure. A property that barely cash flows on a standard DSCR loan may perform strongly with IO financing.

At East Coast Mortgage, we offer interest-only DSCR and jumbo IO products through our lender network. Submit your scenario to explore your options.