Can my ARM payment go down?

Yes. If the underlying index falls at an adjustment date, your rate and payment can decrease, subject to the terms of your loan.

Rates & Loans

How does an adjustable-rate mortgage (ARM) work?

Updated Jul 1, 2026

The short answer

An adjustable-rate mortgage has an initial fixed-rate period — often written as 5/6 or 7/6, meaning 5 or 7 years fixed then adjusting every 6 months — after which the rate resets based on a published index plus a fixed margin. Rate caps limit how much it can change per adjustment and over the life of the loan. Your payment can increase significantly once the fixed period ends.

Key points

Notation like 5/6 means 5 years fixed, then adjusts every 6 months.
New rate = index + margin, subject to caps.
Caps limit each adjustment and the lifetime maximum.
Budget for the possibility of higher payments later.

Reading the caps

ARM disclosures show initial, periodic, and lifetime caps. Knowing the worst-case payment at the lifetime cap — not just the intro payment — is essential to judging whether an ARM is affordable for you.

Common questions

Can my ARM payment go down?: Yes. If the underlying index falls at an adjustment date, your rate and payment can decrease, subject to the terms of your loan.

Sources

Every claim above traces to a public government source.

T1What is an adjustable-rate mortgage (ARM)?
Consumer Financial Protection Bureau · Government / primary · 2024
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