How much can an ARM payment increase at reset?

The maximum payment increase at each reset is limited by rate caps written into your loan. Most ARMs have a periodic cap (often 2% per year) and a lifetime cap (often 5–6% above the initial rate). For example, a 5/1 ARM at 4% with a 2% periodic cap and 6% lifetime cap could reset to a maximum of 6% in year 6, then 8% in year 7, and no higher than 10% over the life of the loan.

What is a 5/1 ARM reset?

A 5/1 ARM has a fixed interest rate for the first 5 years, then resets annually based on a market index (typically SOFR) plus a margin set in your loan documents. The first reset in year 6 is often the largest single change. After that, it adjusts once per year up to the periodic cap.

Can I refinance before my ARM resets?

Yes, refinancing to a fixed-rate loan before your ARM resets is one of the most common ways to avoid payment increases. To qualify you need sufficient income, credit, and equity. Apply several months before your reset date — the process typically takes 30–60 days. If your credit or equity has declined, a loan modification through your servicer may be an alternative.

What index does my ARM use?

Most new ARMs originated after 2022 use SOFR (Secured Overnight Financing Rate) as their index. Older ARMs may use LIBOR replacements or Treasury indices. Your loan documents state the exact index. The new rate at each reset equals the index value on the reset date plus your margin (a fixed number specified in your loan, typically 2.25–3%).

What happens if I cannot afford the higher ARM payment?

If you cannot afford the new payment after an ARM reset, contact your servicer immediately. Options may include requesting a loan modification, applying for forbearance, or refinancing if you qualify. Acting before you miss payments preserves more options. A HUD-approved housing counselor can help you evaluate the right path for your situation.

Adjustable-rate mortgages

ARM loan rate reset: what to expect and how to prepare

An ARM reset is the moment your adjustable-rate mortgage switches from its fixed introductory period to variable annual adjustments. For many homeowners, the first reset brings a significant payment increase — sometimes $300 to $700 per month or more. Understanding how the reset is calculated and what options you have before the date gives you the most room to act.

Last reviewed: May 2026 · About this site

Check your reset date now: Your ARM note documents state the exact first adjustment date. If you do not know when your loan resets, call your servicer and ask. Acting 6–12 months before the reset date gives you the most options.

Free private tool

Check your Mortgage Stress Score

Answer a few private questions about your payment, income, reserves, and mortgage situation. See whether your risk looks low, moderate, or high — and which next steps may fit your situation.

Check my free score →

Free · Private · No lender calls · No phone number required

How an ARM reset is calculated

When your ARM reaches its adjustment date, your new rate is not chosen arbitrarily. It is calculated using a formula your lender disclosed at closing: new rate = current index + your margin. Your margin is fixed for the life of the loan — typically 2.25% to 3%. The index changes with market conditions.

Most ARMs originated since 2022 use SOFR (Secured Overnight Financing Rate). Your loan documents identify the exact index. On your reset date, the servicer looks up the index value, adds your margin, and that sum becomes your new rate — subject to caps.

Rate caps: the limits on how high your payment can go

Federal regulations require ARMs to have rate caps. There are typically three:

Initial cap: limits how much the rate can change on the first adjustment (often 2% or 5%).
Periodic cap: limits changes at each subsequent adjustment, usually 1% or 2% per year.
Lifetime cap: the maximum increase over the original rate, typically 5% or 6%.

Example: a 5/1 ARM at an initial rate of 4.5% with 2/2/6 caps can reset to at most 6.5% in year 6, 8.5% in year 7, and never above 10.5% total — regardless of where the index goes.

Lower rate scenario

If the index falls or stays low, your payment may stay similar or even decrease at reset. Not all resets mean higher payments.

Higher rate scenario

If rates have risen significantly since your loan closed, the first reset is often capped at the initial cap limit — which can still mean a $200–500/month increase.

What a reset means for your monthly payment

The rate change translates directly into a payment change. As a rough guide: for every 1% rate increase on a $300,000 loan balance, the monthly payment increases by approximately $180–200. A 2% increase moves the payment up $360–400 per month. Run the math on your actual balance and remaining term to estimate your post-reset payment.

Request a written reset notice from your servicer. Federal regulations require servicers to notify ARM borrowers of an upcoming rate change 60–120 days before the first adjustment. If you have not received this notice, call and request it.

Options before your reset date

Option 1: Refinance to a fixed-rate loan

Converting to a 30-year or 15-year fixed removes rate uncertainty permanently. To refinance you need sufficient equity (typically 5–20% depending on loan type), acceptable credit, and income that qualifies for the new payment. Apply 3–6 months before your reset date — processing takes 30–60 days and rushing increases error risk. Compare the total cost of refinancing (closing costs, new term length) against the savings from avoiding the higher ARM rate.

Option 2: Ask your servicer about ARM conversion

Some ARM loans include a conversion option — a clause that allows you to convert to a fixed rate at specific reset dates, sometimes for a fee, without a full refinance. Check your original loan documents for a "conversion feature" section, or ask your servicer directly.

Option 3: Loan modification for hardship cases

If the reset will make your payment unaffordable and you cannot qualify for a refinance, a loan modification through your servicer may be available. This is particularly relevant for FHA ARMs, where HUD requires servicers to evaluate loss-mitigation options. See our FHA loan modification guide for details on the FHA process.

Option 4: Sell or pay down principal before reset

If you plan to move in 1–2 years, selling before the reset avoids the payment increase entirely. If you have accessible savings, making a principal-reduction payment before the reset date lowers the balance the new rate applies to, reducing the payment impact.

What to ask your servicer right now

What is my exact first adjustment date?
What index does my loan use, and what is the current index value?
What is my margin?
What are my rate caps (initial, periodic, lifetime)?
Does my loan have a conversion option?
What would my estimated payment be at the maximum cap rate?

Get it in writing: Ask your servicer to send you the next adjustment calculation in writing — the date, the index value used, the margin, and the resulting rate. Compare this to your loan documents to confirm accuracy.

Check your full mortgage stress level

An ARM reset is one factor. Your Mortgage Stress Score combines payment burden, missed payments, equity, loan type, and urgency to show your complete risk picture.

Check my free score →

Sources