Can You Refinance an ARM to Another ARM: Costs and Break-Even

You can refinance an ARM to another ARM, and lenders treat it as a routine transaction. The move makes sense when the new loan resets your introductory fixed period, lowers the margin used to calculate future adjustments, tightens the rate caps, or drops your current rate enough to pay back the closing costs within the time you plan to keep the home. Fannie Mae will buy the new loan as long as you meet a 640 minimum credit score and hold at least 5% equity for a limited cash-out refinance.¹

Why Refinance One ARM Into Another

The strongest reasons are mechanical, not emotional. If your current ARM’s fixed period is running out, a new ARM buys you another five, seven, or ten years of a locked rate before adjustments begin again. If rates or your credit have improved since you first closed, you may qualify for a lower margin, and that margin stays with the loan for its entire life. Better rate caps can also matter: a new note with a lower initial-adjustment cap or lifetime cap reduces your worst-case future payment even if today’s rate is similar.

None of that requires committing to a 30-year fixed. If you expect to sell, pay down significantly, or refinance again before the next fixed period ends, another ARM keeps the starting rate lower than a comparable fixed-rate loan would.

Do You Qualify

Three numbers govern eligibility: credit score, equity, and debt load.

Fannie Mae’s minimum credit score for an ARM is 640, higher than the 620 floor on fixed-rate mortgages.¹ Lenders offering the most competitive margins typically look for scores of 700 or above.

For equity, a limited cash-out refinance on a primary residence allows a loan-to-value ratio up to 95%, meaning you need at least 5% equity. A true cash-out refinance, where you pull equity out of the home, caps LTV at 80%, so you need at least 20% equity.²

On debt-to-income ratio, the old 43% federal ceiling no longer applies. A 2021 amendment replaced that cap with a pricing-based test for Qualified Mortgages, so there is no single federal number that automatically disqualifies you.³ Lenders still consider DTI during underwriting and apply their own internal limits.

If your balance exceeds the 2026 conforming limit of $832,750, you will need a jumbo ARM.⁴ Jumbo lenders usually want credit scores of 720 or higher and at least 20% equity. Because Fannie Mae and Freddie Mac do not purchase these loans, each lender sets its own terms, and shopping around matters more.

Read the New ARM Before You Sign

Every ARM has three parts that control what you pay. Compare offers on all three, not just the teaser rate.

Introductory Fixed Period

Your rate is locked during the initial phase, most often five, seven, or ten years. A longer fixed period usually carries a slightly higher starting rate in exchange for more payment stability. Refinancing resets this clock, which is often the main reason borrowers move from one ARM to another.

Index and Margin

After the fixed period ends, your rate adjusts on a formula: a floating index plus a fixed margin. Nearly all new ARMs use the Secured Overnight Financing Rate as their index, after Fannie Mae and Freddie Mac stopped buying LIBOR-based ARMs at the end of 2020.⁵ The margin, typically 2% to 3%, is set at closing and stays the same for the life of the loan. SOFR plus your margin equals the fully indexed rate you pay during each adjustment period.

Rate Caps

Rate caps limit how much your payment can jump. They work on three levels:⁶

The initial adjustment cap limits the first reset after the fixed period, commonly two or five percentage points.
The subsequent adjustment cap limits each later reset, most often one or two percentage points.
The lifetime cap limits the total increase over the life of the loan, most commonly five percentage points above the initial rate.

A “2/2/5” cap structure means the rate can rise no more than 2% at the first adjustment, 2% at each later adjustment, and 5% total above the starting rate. These figures appear in the mortgage note and set the absolute ceiling on your future payment.

Check Your Current ARM for a Prepayment Penalty

Before you apply, confirm that paying off your existing ARM early will not trigger a fee. Federal law prohibits prepayment penalties on adjustable-rate loans that qualify as Qualified Mortgages, and most ARMs from mainstream lenders in recent years fall into that category.⁷

For the smaller number of non-QM or portfolio ARMs that do carry a penalty, federal law caps it at 3% of the balance in the first year, 2% in the second year, and 1% in the third year. After three years, no prepayment penalty is allowed on any Qualified Mortgage.⁷ Your mortgage note or a call to your servicer will confirm whether one applies.

Run the Break-Even Number

A refinance saves money only if you keep the loan long enough for lower payments to cover closing costs. Divide total closing costs by the monthly payment reduction. The result is how many months you need to break even.

If the refinance costs $4,000 and your payment drops by $150 a month, you break even in about 27 months. Selling or refinancing again before that point means the transaction cost more than it saved. You can sharpen the estimate by multiplying your monthly savings by one minus your marginal tax rate before dividing into total costs.⁸

What the Refinance Will Cost

Total closing costs typically run 3% to 6% of the outstanding loan balance, depending on optional charges like discount points.⁸ Expect these line items:

A loan origination fee, often 0% to 1.5% of the loan amount.
Optional discount points, each costing 1% of the loan amount in exchange for a lower rate.
An appraisal fee, generally $300 to $700 for a single-family home.⁸
Title search and title insurance charges.
An attorney or settlement fee for the closing agent.
Recording fees and transfer taxes, which vary by jurisdiction.

Some lenders advertise “no-closing-cost” refinances that roll fees into the balance or trade them for a slightly higher rate. That reduces cash out of pocket but raises either what you owe or what you pay each month. Run both versions through the break-even formula and pick the one that costs less over the years you actually plan to keep the loan.

Streamline Options if Your Current ARM Is FHA or VA

Government-backed ARMs come with faster refinance paths that skip parts of standard underwriting.

An FHA-insured ARM on a primary residence can be refinanced into another FHA ARM through the FHA Streamline program without a new appraisal. A non-credit-qualifying streamline does not require a credit check or income verification; the lender mainly confirms an on-time payment history and that the new loan produces a tangible benefit like a lower payment.⁹

Veterans and service members with a VA-backed ARM can use the Interest Rate Reduction Refinance Loan, or IRRRL, to move into a new ARM or a fixed-rate loan. You must certify that you currently live in or previously lived in the home, and the refinance must lower your rate or shift you from adjustable to fixed.¹⁰ Both streamline programs cut cost and time compared with a standard refinance, so check which one you qualify for before starting a conventional application.

1
Fannie Mae. General Requirements for Credit Scores
2
Fannie Mae. Eligibility Matrix
3
Federal Register. Qualified Mortgage Definition Under the Truth in Lending Act Regulation Z General QM Loan Definition
4
U.S. Federal Housing Finance Agency. FHFA Announces Conforming Loan Limit Values for 2026
5
U.S. Federal Housing Finance Agency. LIBOR Transition
6
Consumer Financial Protection Bureau. What Are Rate Caps With an Adjustable-Rate Mortgage ARM and How Do They Work
7
Office of the Law Revision Counsel. 15 US Code 1639c – Minimum Standards for Residential Mortgage Loans
8
Board of Governors of the Federal Reserve System. A Consumers Guide to Mortgage Refinancings
9
Federal Deposit Insurance Corporation. Streamline Refinance
10
U.S. Department of Veterans Affairs. Interest Rate Reduction Refinance Loan