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Interest-only mortgages.
An initial period where the loan does not amortize. A cash-flow tool for a specific kind of borrower, and the wrong answer for most people.
Cash-flow structure
What it means
An ordinary mortgage payment splits between interest and principal, so the balance falls a little every month. On an interest-only loan, for an initial period, only the interest is due. The balance does not fall during that window unless you choose to pay it down.
When the interest-only period ends, the loan begins amortizing over whatever term is left. That is the part people miss, and it is the part to understand before you sign: the payment steps up at that point, and it steps up by more than it would have if the loan had been amortizing all along.
Who it actually fits
- Lumpy income. Commission, bonus or distribution earners who want a low required payment and pay down principal in bulk when the money lands.
- Investors. Maximizing property cash flow, where the plan is to sell or refinance before amortization begins.
- Borrowers with a defined bridge. A known event — vesting, a sale, a career change already in motion — that changes the picture inside the window.
Who it does not fit
Anyone using it to afford a house they could not otherwise afford. That is the use that got this product its reputation, and the reputation was earned. If the amortizing payment is out of reach, the honest answer is a different house, not a different structure.
Also worth saying plainly: you build no equity through payments during the interest-only period. Any equity you gain comes only from the market moving in your favor, and markets do not owe you that.
Questions people ask
Can I pay principal anyway?
Yes, on essentially every program, and that is the whole point of the structure for most sensible users of it. The interest-only payment is the minimum, not the maximum.
Are these the loans that caused 2008?
They were part of it, in combination with no income documentation and negative amortization. Today’s interest-only loans are fully documented, subject to ability-to-repay rules, and qualified against the higher payment that applies after the interest-only period ends — not against the introductory one. That last rule is the one that matters.
Are they only for jumbo loans?
Mostly they show up on jumbo and non-QM programs, and on investor loans. They are uncommon in the agency world.
Program availability varies by state, by occupancy and by loan size. A licensed loan officer will confirm what is available for your situation.
Find out what you qualify for.
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