Yes, you can refinance an ARM to another ARM, and lenders treat it as a routine transaction. Doing so resets the introductory fixed-rate period, can lower your margin, and can tighten your rate caps, all without locking you into a long-term fixed rate. What determines whether it’s worth doing is your eligibility, the terms of the new loan, and whether the closing costs pay back before you’d move or refinance again.
Who Qualifies
Three numbers drive the decision: your credit score, your equity, and your debt load.
Fannie Mae sets the minimum credit score for ARM loans at 640, which is higher than the 620 floor for fixed-rate mortgages.1Fannie Mae. General Requirements for Credit Scores Lenders offering the most competitive margins often look for scores of 700 or above.
For a limited cash-out refinance on a primary residence, the maximum loan-to-value ratio is 95%, meaning you need at least 5% equity. If you want to pull cash out, the cap drops to 80%, so you need at least 20% equity.2Fannie Mae. Eligibility Matrix
Lenders must also verify that you can handle the new payment under the federal Ability-to-Repay rule. The original version set a hard 43% ceiling on debt-to-income ratio, but a 2021 amendment replaced that cap with a pricing-based test for Qualified Mortgages. Lenders still consider DTI during underwriting and most apply internal limits, but there is no longer a single federal number that automatically disqualifies you.3Federal Register. Qualified Mortgage Definition Under the Truth in Lending Act Regulation Z General QM Loan Definition
Jumbo Loans
If your loan amount exceeds the 2026 conforming limit of $832,750, you will need a jumbo ARM.4U.S. Federal Housing Finance Agency. FHFA Announces Conforming Loan Limit Values for 2026 Jumbo lenders generally impose tighter standards. Credit scores of 720 or higher and at least 20% equity are common thresholds. Because these loans are not purchased by Fannie Mae or Freddie Mac, each lender sets its own terms, so shopping among several institutions matters more here than with a conforming loan.
What the New ARM’s Terms Actually Control
Every ARM has three mechanical parts that determine what you pay: the introductory fixed period, the index-plus-margin formula, and the rate caps. Understanding each one before signing lets you calculate the worst-case payment and compare offers meaningfully.
The Introductory Fixed Period
During the initial phase, commonly five, seven, or ten years, your interest rate stays locked. If you are refinancing from an ARM whose fixed period is expiring, the new ARM resets that clock. A longer introductory period gives more payment stability but usually comes with a slightly higher starting rate.
The Index and Margin
Once the fixed period ends, your rate adjusts periodically based on a floating index plus a fixed margin. Nearly all new ARMs now use the Secured Overnight Financing Rate (SOFR) as their index, after Fannie Mae and Freddie Mac stopped purchasing LIBOR-based ARMs at the end of 2020.5U.S. Federal Housing Finance Agency. LIBOR Transition The margin, typically between 2% and 3%, is negotiated at closing and stays the same for the life of the loan. Added together, the current SOFR value plus your margin equals the fully indexed rate you pay during each adjustment period.
Rate Caps
Rate caps protect you from extreme jumps in your payment. They work on three levels:6Consumer Financial Protection Bureau. What Are Rate Caps With an Adjustable-Rate Mortgage ARM and How Do They Work
- The initial adjustment cap limits how much the rate can change at the first reset after the fixed period, commonly two or five percentage points.
- The subsequent adjustment cap limits changes at each reset after the first, 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 loan described as having a “2/2/5” cap structure means the rate can rise by no more than 2% at the first adjustment, 2% at each later adjustment, and 5% total above the starting rate. These figures are recorded in the mortgage note and set the absolute maximum payment you could face.
Prepayment Penalties on Your Current ARM
Check your existing loan before you start. Federal law prohibits prepayment penalties entirely on adjustable-rate loans that qualify as Qualified Mortgages.7Office of the Law Revision Counsel. 15 US Code 1639c – Minimum Standards for Residential Mortgage Loans Most ARMs originated by mainstream lenders in recent years fall into that category, so most borrowers owe nothing extra for paying off the old loan early.
For the small number of loans that do carry a penalty, generally non-QM or portfolio products, 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.7Office of the Law Revision Counsel. 15 US Code 1639c – Minimum Standards for Residential Mortgage Loans Review your current mortgage note or call your servicer to confirm.
Calculating Your Break-Even Point
Refinancing saves you money only if you stay in the home long enough for the monthly savings to exceed the closing costs. The formula is straightforward: divide total closing costs by the monthly payment reduction. The result is how many months you need to break even.
If your refinance costs $4,000 and your monthly payment drops by $150, you break even in about 27 months. If you plan to sell or refinance again before that point, the transaction may cost more than it saves. You can sharpen the estimate by factoring in the tax impact: multiply your monthly savings by one minus your marginal tax rate before dividing into the total costs.8Board of Governors of the Federal Reserve System. A Consumers Guide to Mortgage Refinancings
Closing Costs to Expect
Refinancing is not free. Total closing costs typically run between 3% and 6% of the outstanding loan balance, though some refinances come in lower depending on how many optional fees you choose to pay.8Board of Governors of the Federal Reserve System. A Consumers Guide to Mortgage Refinancings Common line items include:
- A loan origination fee, charged by the lender for processing the new loan, often 0% to 1.5% of the loan amount.
- Discount points, optional upfront payments to buy a lower rate, with each point costing 1% of the loan amount.
- Title search and title insurance, which cover confirming clear title and protecting the lender against title defects.
- An attorney or closing fee for the settlement agent handling the paperwork.
- Recording fees and transfer taxes, which vary by jurisdiction.
- An appraisal fee, generally $300 to $700 for a single-family home depending on size, location, and complexity.8Board of Governors of the Federal Reserve System. A Consumers Guide to Mortgage Refinancings
Some lenders offer “no-closing-cost” refinances, which roll the fees into the loan balance or cover them in exchange for a slightly higher interest rate. This reduces your upfront expense but increases either the amount you owe or the rate you pay. Weigh it against your break-even calculation to see which approach costs less over the time you plan to keep the loan.
Timeline and Your Right to Cancel
Most conventional refinances close within 30 to 45 days of application. After you submit documents, the lender orders an independent appraisal, and the appraised value directly affects your loan-to-value ratio. A lower-than-expected result could change the terms you are offered or require more equity from you. The underwriter then verifies income, assets, and employment against third-party records and reviews the title report. Responding quickly to any conditions request keeps the timeline on track.
Once conditions are satisfied, the lender issues a “clear to close” notice. At the closing appointment, you sign the new mortgage note and the closing disclosure, and the lender uses the new loan proceeds to pay off your existing ARM in full.
Because you are refinancing a primary residence, federal law gives you a three-business-day right to cancel the transaction after signing. During this rescission period, the lender cannot disburse funds other than into escrow, and the old loan is not yet discharged. If you do not cancel, the new loan funds and your old ARM is paid off after those three days pass.9Consumer Financial Protection Bureau. 12 CFR Part 1026 Regulation Z – 1026.23 Right of Rescission
Streamline Options for FHA and VA Borrowers
If your current ARM is backed by a government program, you may have access to a simplified path with fewer requirements than a conventional refinance.
FHA Streamline Refinance
Borrowers with an existing FHA-insured ARM can refinance into another FHA ARM on a primary residence without a new appraisal. A non-credit-qualifying streamline does not require a credit check or income verification. The lender mainly confirms that you have been making payments on time and that the new loan provides a tangible benefit, such as a lower payment.10Federal Deposit Insurance Corporation. Streamline Refinance Skipping the appraisal and much of the underwriting cuts both the cost and the timeline.
VA Interest Rate Reduction Refinance Loan
Veterans and service members with a VA-backed ARM can use the Interest Rate Reduction Refinance Loan (IRRRL), often called a VA streamline, 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 move you from an adjustable to a fixed rate.11U.S. Department of Veterans Affairs. Interest Rate Reduction Refinance Loan Like the FHA streamline, the IRRRL process is designed to be faster and less documentation-heavy than a standard refinance.