--- title: "Interest-Only Mortgages: Who They Are For, Who They Hurt | Ondo Real Estate | Ondo RE" canonical: https://www.ondorealestate.com/blog/interest-only-mortgages-who-they-are-for/ --- # Interest-Only Mortgages: Who They Are For, Who They Hurt A lower required payment is not the same as a lower note rate, and it is not forever. [Home](/)[Learn](/learn/)Loan ProgramsLoan Programs Educational [← Mortgage learning hub](/learn/) An interest-only mortgage is for borrowers who can document a plan for the fully amortizing payment when the IO period ends — typically jumbo or portfolio overlays, not a standard conforming 30-year you can assume. It hurts anyone who budgets only the interest draft and treats IO as a teaser that never ends. Snapshot as of 2026-08. This page does not quote an IO rate, a payment, or a promise that an IO file will be originated. Compare Loan Estimates. Extra principal during IO is a choice, not a required amortization schedule. ## What interest-only is Interest-only (IO) means scheduled payments for a stated period cover interest, not principal. The note rate still exists. Principal usually starts amortizing when the IO period ends, or earlier if you pay extra principal. Typical conversation: jumbo or portfolio files, high cash-flow borrowers, and some investors who plan the payment change. It is an overlay product, not a standard conforming 30-year you can assume. IO vs ARM vs temporary buydown as of 2026-08. Not a rate quote.QuestionInterest-only[ARM (amortizing)](/buy/adjustable-rate/)[Temporary buydown](/blog/temporary-buydown-who-pays-year-three/) What it changesInterest-only (IO) means scheduled payments for a stated period cover interest, not principal. The note rate still exists. Principal usually starts amortizing when the IO period ends, or earlier if you pay extra principal.Caps are often written as initial / periodic / lifetime, for example 2/1/5. Those numbers are percentage-point limits on how far the note rate can move, not a promise of what it will do.A 2-1 buydown typically means year 1 is about 2 percentage points below the note rate, year 2 about 1 point below, then the full note payment. The note rate does not change; a subsidy account covers the difference. When the payment can jumpWhen IO ends, the payment is recalculated to amortize remaining principal over the remaining term. That payment can jump even if the note rate did not. Taxes, insurance, and HOA can still rise during IO. Plan the fully amortizing payment, not only year-one interest.A cap on the rate is not a cap on taxes, insurance, or HOA. The full payment can still rise when those change.When the subsidy ends, you pay the full note payment plus taxes, insurance, and HOA. Plan for that payment, not only year-one principal and interest. If you expect to refinance before then, still run break-even after costs — a buydown is not a free refinance option. Some ARMs are also IO. Caps and IO are still different machines. ## Payment shock When IO ends, the payment is recalculated to amortize remaining principal over the remaining term. That payment can jump even if the note rate did not. Taxes, insurance, and HOA can still rise during IO. Plan the fully amortizing payment, not only year-one interest. - Write down the fully amortizing P&I the note describes after IO — not only year-one interest. - Add taxes, insurance, HOA, and mortgage insurance. Those lines are not capped by an IO schedule. - Extra principal during IO is optional. It is not the same as a recast or a refinance. See [recast vs refinance](/blog/recast-vs-refinance/). ## Not a teaser, not an ARM slogan IO is not a temporary buydown and not an ARM teaser. A 2-1 buydown subsidizes a fully amortizing note for a few years. An ARM changes the rate after a fixed period. IO changes whether principal is required. Do not market IO as “the best rate” or a forever-low payment. Some ARMs are also IO; many are not. Caps limit rate movement on an ARM. They do not prevent IO payment shock when amortization starts. Read ARM caps and this page as different machines. Cap structure: [ARM caps in plain English](/blog/arm-caps-in-plain-english/). Commercial ARM overview: [adjustable-rate mortgages](/buy/adjustable-rate/). Why a news average is not your quote: [rates hub](/buy/rates/). ## Who it is for vs who it hurts - **Often in the conversation:** high cash-flow files, jumbo/portfolio overlays, borrowers who will sell or refinance with eyes open before amortization starts — still run [break-even after costs](/blog/refinance-break-even-when-lower-rate-loses/) if a refinance is the plan. - **Often a poor fit:** stretching to the IO draft on a first home, treating IO as “the best rate,” or ignoring the reset. Jumbo context: [jumbo loans](/loans/jumbo/). ## What this page will not do - Quote an IO start rate or a payment. - Promise that Ondo or any investor will originate IO on your file. - Call IO a teaser, a buydown, or a forever-low payment. ## What happens next - On any Loan Estimate, find whether the payment is IO or fully amortizing, and for how long. - Illustrate P&I on the [payment calculator](/calculators/mortgage-payment/) using the post-IO payment, not only the IO draft. - Talk through overlays: [start a mortgage conversation](/qualify/). ## Common questions ### Is interest-only a teaser rate? ### What is payment shock on an IO loan? ## Keep going [Adjustable-rate mortgages ARM structure, caps, and when a shorter fixed period can be a planning tool rather than a gamble.](/buy/adjustable-rate/)[ARM Caps in Plain English Initial, periodic, and lifetime caps are percentage-point limits on the note rate — not a payment promise. How to read 2/1/5 on an ARM.](/blog/arm-caps-in-plain-english/)[Jumbo loans in Utah Financing above the conforming limit for the property county. Limits change annually.](/loans/jumbo/)[Why your quote is not the 30-year average Why a news 30-year average is not your Loan Estimate. Locks, APR, and points. Not a live rate table.](/buy/rates/)[Mortgage payment calculator Principal, interest, and optional taxes, insurance, and PMI. Not a quote.](/calculators/mortgage-payment/)[Start a mortgage conversation What you will be asked, and what a conversation will not promise. This is not an instant approval, a lock, or a commitment to lend.](/qualify/) ## What to do next Education first. A conversation with a loan officer is how you find out what may actually fit your file. [Adjustable-rate overview](/buy/adjustable-rate/)[Jumbo loans in Utah](/loans/jumbo/)[Mortgage payment calculator](/calculators/mortgage-payment/) Loan information is provided by Ondo Real Estate (NMLS ID on file). This is not a commitment to lend, a loan approval, or an offer of credit. Rates, terms, and payments shown are estimates for illustration only, are not a quote, and are subject to credit approval, underwriting, and market conditions. You are not required to use Ondo for financing to buy or sell with Ondo. Equal Housing Lender. Program rules, fees, and county loan limits change. Confirm the current published schedule and lender overlays. Nothing here is a quote, a lock, or a credit decision. [Licensing and disclosures](/licensing/)