Quick Answer
On an adjustable-rate mortgage, a rate cap limits how far your interest rate can rise at each adjustment and across the full loan term. Caps are commonly expressed as three numbers, such as 2/2/5, covering the first adjustment, each later adjustment, and the lifetime maximum.
- Applies to
- Adjustable-rate mortgages (ARMs)
- Common format
- Expressed as three numbers, e.g. 2/2/5
- What it limits
- How much the rate can rise per adjustment and over the loan's life
- Why it matters
- Keeps payment increases within a predictable range
How Rate Caps Are Structured
A typical cap structure has three parts: the initial adjustment cap, the periodic adjustment cap, and the lifetime cap. Together, they set boundaries on how much your rate, and therefore your payment, can move at each step and over the full term of the ARM.
Cap structures vary by lender and loan program, so it's worth reviewing your specific loan's caps rather than assuming a standard structure applies.
Why Rate Caps Matter to Borrowers
Without a cap, an ARM's rate could theoretically rise sharply at each adjustment. Caps give borrowers a predictable ceiling, which makes it easier to budget for a worst-case scenario before choosing an ARM over a fixed-rate mortgage.
Understanding your loan's specific caps, along with how often adjustments occur, is an important part of deciding whether an ARM fits your plans.
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Frequently Asked Questions — Rate cap
What does a 2/2/5 cap mean?
It commonly means the rate can rise up to 2 percent at the first adjustment, up to 2 percent at each later adjustment, and up to 5 percent over the life of the loan, though exact structures vary by lender.
Do all ARMs have rate caps?
Most ARMs sold today include caps, but the specific limits vary by lender and loan program, so always confirm your loan's terms.
Can my rate ever go down with an ARM?
Yes. ARM rates adjust based on an index and can move down as well as up, within the loan's cap structure.
Is a rate cap the same as a fixed rate?
No. A rate cap limits how much a variable rate can change; a fixed-rate mortgage doesn't change at all over the loan term.