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Fidelity Residential home
Guide · Investors and buyers

The Payment You Are Underwritten On Is Not the Payment You Make

The lighter interest-only payment is usually not the one you are measured on. This guide shows how the real underwriting payment is built, so you can run the math before anyone runs it on you.

Who it is for: Investors and buyers weighing an interest-only loan to free up monthly cash flow.

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  • NMLS #103098
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Cover of the guide The Payment You Are Underwritten On Is Not the Payment You Make
A short guide in PDF form, sent by email or text when you ask for it below.
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Why it matters

The opening payment is not the bar

Most people assume the interest-only payment they will make is the payment they are underwritten on. On many of these loans, underwriting uses the payment that starts after the interest-only period ends, when the balance has to be paid down over the time that is left.

That later payment is not just an underwriting number: it is the payment you start making when the period ends. On an adjustable-rate version, a rate change can move it again. Interest-only can help cash flow, but it does not lower the bar the way most people expect.

What the guide covers

  • The myth that trips up almost everyone
  • How the underwriting payment is really built, step by step
  • Where the qualifying rate comes from on an adjustable-rate loan
  • What to have ready before you apply
  • When a simpler loan beats this one, and smart moves before you commit
  • Questions worth asking out loud

The honest part. If a conventional loan fits comfortably and you do not need the lower opening payment, it is often the cleaner and cheaper choice.

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This page is general information, not a commitment to lend. Programs, terms and eligibility depend on credit, income, property and underwriting review and are subject to change without notice.