Understanding Adjustable-Rate Mortgage Resets

Q: How much can my ARM payment go up at the first reset?

It depends on your initial cap, which is usually 2 or 5 percentage points. On a $300,000 balance, a 2-point jump from 5% to 7% raises the principal-and-interest payment by roughly $340 a month. Your note lists all three caps, initial, periodic and lifetime, in the adjustable-rate section, and your servicer must send notice before the first change.

Q: When does an ARM reset happen?

The first reset comes at the end of the introductory fixed period named in the loan type. A 5/1 ARM resets after five years, a 7/1 after seven, a 10/1 after ten. After that first change, the rate adjusts on the frequency shown by the second number: annually for a 5/1, or every six months for a 5/6 ARM tied to a 30-day average SOFR index.

Q: Can my ARM rate go down at a reset?

Yes. Resets move in both directions. If the index falls between adjustments, your new rate drops to the index plus margin, subject to a floor rate that many notes set at the margin itself. Borrowers who reset in a falling-rate stretch can see payments decline without doing anything, because the recalculation is automatic and requires no application.

Q: Should I refinance before my ARM resets?

Refinance if you plan to stay in the home past the reset and fixed rates are at or near your current rate. Start shopping six to nine months out so an appraisal, credit repair or income documentation delay does not push you past the adjustment date. If you expect to sell or move before the fixed period ends, riding out the ARM usually costs less than paying refinance closing costs.

Written by Samantha SheltonNMLS 1647301Updated October 2026

Homeowner at a kitchen island planning ahead for an adjustable-rate mortgage reset and payment change

An adjustable-rate mortgage reset is the moment your interest rate stops being fixed and starts adjusting with the market, and federal rule gives you most of a year’s warning before it reaches your bank account. Your servicer must deliver the initial rate adjustment notice at least 210 days, and no more than 240 days, before the first payment at the adjusted level is due.

The new rate is not a mystery number. It is your loan’s published index plus the fixed margin written into your note, held down by rate caps that same note spells out. No application, no appraisal, no signature, the reset runs on a schedule you agreed to at closing.

Learn how an adjustable-rate mortgage reset works: the math behind your new payment, how initial, periodic and lifetime caps limit the increase, when each ARM type adjusts, and what to do before your first adjustment. Still choosing a structure? Start with our Loan Types & Programs guide.

Key takeaways:

A reset is a recalculation, not a new loan: your lender adds a fixed margin to a published index, applies your caps, and re-amortizes the remaining balance over the years left on the term, 25 of them on a 30-year 5/1 ARM.
Caps live in your note, not in a universal rule: the CFPB reports initial caps commonly at 2 or 5 percentage points, later adjustments most commonly at 1 or 2, and lifetime caps most commonly at 5, while FHA sets its own by regulation at 2 points per adjustment and 6 over the life of a 5-, 7- or 10-year ARM.
You get at least 210 days of warning, spend them: that window, plus a second notice at least 60 days before the new payment is due, is when paying down principal or shopping a fixed-rate refinance costs nothing but effort.

What is an adjustable-rate mortgage reset?

An adjustable-rate mortgage reset is the recalculation of your interest rate and monthly payment at the end of your loan’s introductory fixed-rate period, and at every scheduled adjustment after that. Your servicer looks up the current value of your index, adds the margin already written into your note, checks the result against your caps, and re-amortizes the balance you still owe over the term you have left.

Two of those three ingredients never move. As the Consumer Financial Protection Bureau puts it, the margin is set in your loan agreement and will not change after closing, and the lender chooses your index at application. A choice that generally will not change either. Only the index floats, which makes the reset predictable in method even when it is not predictable in amount. Investopedia keeps a plain-language definition of an ARM reset, and our overview of fixed and adjustable structures shows where resets fit.

How does an adjustable-rate mortgage reset work?

Run the numbers and it stops feeling abstract. Take a $300,000 loan on a 30-year 5/1 ARM with a 5% start rate and a 2-point initial cap. Principal and interest during the fixed period come to about $1,610 a month, and after 60 payments the balance has fallen to roughly $275,486.¹

Now the reset arrives. Suppose index plus margin lands above 7%. The initial cap holds the new rate at 7%, and your servicer re-amortizes that $275,486 over the 300 months remaining. The new principal-and-interest payment is about $1,947, roughly $336 more a month, or about $4,032 over the first adjusted year.

Two details do the heavy lifting:

The cap can bind before the market does: if index plus margin had come in at 8.5%, you would still pay 7% that year. FHA prohibits carrying index increases above the cap into a later adjustment; conventional programs vary.
The payment is rebuilt on the remaining term: the reset re-amortizes over 25 years, not 30, which is why every principal dollar you prepay beforehand lowers the recalculated payment.

The CFPB’s Consumer Handbook on Adjustable-Rate Mortgages names the risk plainly: payment shock may occur if your mortgage payment rises sharply at a rate adjustment. One number never appears here, deliberately, a current rate. The only rate that governs your reset is the one published on your own adjustment date.

What are ARM rate caps, and how much can your rate really jump?

Rate caps are the ceilings your note places on how far your rate can move, and there are three. Look them up first: they set the worst case you actually face, almost always narrower than the one you are imagining.

Cap	What it limits	On a 2/2/5 note starting at 5%
Initial adjustment cap	How far the rate can move the first time it adjusts.	2 points. The first reset cannot push the rate above 7%.
Subsequent (periodic) adjustment cap	How far the rate can move at each adjustment after the first.	2 points, no later change moves the rate more than 2 points either way.
Lifetime adjustment cap	How far the rate can move in total, over the life of the loan.	5 points. The rate can never exceed 10%, whatever the index does.

Here is what borrowers most often get wrong: 2/2/5 is a common convention, not a rule. The CFPB describes initial caps as commonly 2 or 5 percentage points, subsequent caps most commonly 1 or 2 percent, and lifetime caps most commonly 5 percent. Yours are whatever your note says. Find them on the Loan Estimate or Truth in Lending disclosure your lender had to provide within three business days after you applied.

Program rules override convention outright. HUD sets FHA ARM limits by regulation: 1 percentage point per adjustment and 5 points over the life of the loan on 1- and 3-year ARMs, and 2 points per adjustment with 6 points over the life on 5-, 7- and 10-year ARMs, in either direction from the initial contract rate.² An FHA 5/1 ARM is therefore a 2/2/6 structure. Fannie Mae requires every ARM plan it buys to carry both lifetime and per-adjustment limits, with a distinction worth knowing: lifetime limits apply to increases only, per-adjustment limits to increases and decreases alike.

On that same $275,486 balance, a rate at the 10% lifetime ceiling produces a principal-and-interest payment near $2,503 about $893 above the $1,610 you started with. That is the outer boundary of a 2/2/5 note, stress-test your budget against it.

When does your ARM reset?

Your first reset arrives at the end of the introductory fixed period named in the loan itself. The CFPB’s handbook explains the shorthand: in a hybrid ARM, the first number is how long the fixed period lasts and the second is how often the rate adjusts after that. A 5/1 ARM is fixed five years, then adjusts once a year until the loan is paid off.

ARM type	Fixed period	Adjusts	Typically suits
5/1	5 years	Once every 12 months	Buyers confident they’ll sell or refinance by year five.
7/1	7 years	Once every 12 months	Buyers wanting a longer runway than a 5/1.
10/1	10 years	Once every 12 months	Borrowers whose timeline is fuzzy past a decade.
5/6	5 years	Every 6 months	Borrowers on newer SOFR-indexed loans.

The naming convention shifted with the index. Older ARMs advertised as 5/1 or 7/1 adjust annually; newer loans on the 30-day average SOFR index are commonly named 5/6 or 7/6, where the second figure counts months. More frequent adjustments are not automatically worse. A periodic cap applies to every one, in both directions.

Your lender already stress-tested this. Fannie Mae requires ARMs with an initial fixed period of five years or less to be qualified at the maximum rate that could apply during the first five years after the first payment is due. ARMs with a longer fixed period qualify at no less than the note rate, or, if the loan is a higher-priced mortgage loan or higher-priced covered transaction, at the greater of the note rate or the fully indexed rate. On a 5/1, your file was underwritten against a payment well above your teaser payment.

Which index does your ARM use?

If your ARM paperwork names LIBOR, that index no longer exists. U.S. dollar LIBOR panels ended after June 30, 2023, and the Federal Reserve’s final rule implementing the Adjustable Interest Rate (LIBOR) Act identified SOFR-based replacements for contracts with no workable fallback of their own.

Conventional ARMs sold to Fannie Mae: tied to the Secured Overnight Financing Rate, specifically the 30-day average of the SOFR index published by the Federal Reserve Bank of New York.
FHA-insured ARMs: may use either the 1-year Constant Maturity Treasury (CMT) index or the 30-day average SOFR index. HUD approved both in Mortgagee Letter 2023-09, issued May 2, 2023.
Your margin, whichever index applies: a fixed number of percentage points added on top, disclosed before you closed and unchanged for the life of the loan.

Because Align is a broker, we can pull ARM and fixed-rate pricing from conventional, FHA and portfolio lenders in one conversation and compare index, margin and caps side by side, not just the headline rate. Our walkthrough of what really separates a fixed-rate mortgage from an ARM goes deeper.

What notice will you get before your ARM resets?

Two notices, and the first is generous. Under federal rule, your servicer must send the initial rate adjustment notice at least 210 days and no more than 240 days before the first payment at the adjusted level is due, roughly seven to eight months of lead time. The CFPB’s handbook puts the same rule in borrower terms: your servicer must notify you about the first interest rate adjustment at least seven months before you owe a payment at the adjusted rate.

That notice must carry an estimate of your new rate and payment, the servicer’s telephone number, how to reach a HUD-approved housing counselor, and a specific list of alternatives: refinancing, selling the property and paying off the loan, modifying loan terms with your creditor or servicer, and arranging forbearance. A second notice follows for the first adjustment and every later one that changes your payment, delivered at least 60 and no more than 120 days before that payment is due with the confirmed figure, not an estimate.

A third document is already in your closing file. Federal rule required your lender to hand you the Consumer Handbook on Adjustable-Rate Mortgages along with a program disclosure when the application form was provided. That disclosure names your index, how rates and payments are calculated, the adjustment frequency, your caps, and whether the loan permits negative amortization or interest rate carryover.

What should you do before your ARM resets?

Act inside the seven-month window, not in the month the payment changes. Every option below is cheaper while your fixed rate is still in force.

Read your three caps first: initial, periodic and lifetime. The lifetime cap names the highest payment you could ever owe on this loan.
Prepay principal during the fixed period: the reset re-amortizes whatever balance remains, so cutting the $275,486 in our example by $15,000 permanently lowers the recalculated payment at every rate.
Price a fixed-rate refinance six to nine months out: appraisals, credit corrections and income documentation all take time. Use Freddie Mac’s weekly survey of average mortgage rates as a benchmark, it covers 30-year and 15-year fixed products, having retired its adjustable-rate series, and read refinancing in a rising rate environment first.
Do not bank on refinancing later: the CFPB’s handbook is blunt. Home prices do not always rise, and if they fall you may owe more than the home is worth and struggle to refinance. Treat a future refinance as an option, never the plan, and learn what a lock does and does not protect from our explainer on the benefits of mortgage rate locks.
Stress-test the budget at the lifetime ceiling: if the worst-case payment fits, riding out the ARM is a legitimate choice. Holding off is always an option.

Our field guide to adjustable-rate mortgage tips collects the questions worth asking your servicer before the adjustment date.

Is keeping the ARM or refinancing the better move?

It comes down to how long you will hold the loan. A refinance costs closing costs and buys a rate fixed for the full term, so it wins when you stay past the break-even point. Keeping the ARM costs nothing, leaves your payment bounded by your caps, and lets the rate fall automatically if the index does, though never below your margin. That wins if you expect to sell soon.

The full case on both sides lives in our companion pieces: adjustable-rate mortgages: pros and cons and the borrower-profile view in pros and cons of adjustable-rate mortgages. To start from neutral ground, the CFPB’s mortgage shopping tools walk through comparing offers without a salesperson in the room.

How Align compares fixed and adjustable

Samantha prices a fixed rate and an adjustable rate side by side, across multiple wholesale lenders, and she starts with how long you expect to keep the loan. That one answer decides more than the rate does.

Comparing offers pays. In late 2022, Freddie Mac found borrowers who got two quotes could have saved as much as $600 a year, and four or more quotes more than $1,200 a year.

Align is paid by the lender, not by a fee you pay us, and federal rules bar a broker's pay from changing with your rate or fees.

Adjustable-rate mortgages

Sources: Freddie Mac, When rates are higher, borrowers who shop around save (February 2023); Regulation Z, 12 CFR 1026.36(d).

FAQ: Adjustable-rate mortgage resets

Here are answers to common questions about adjustable-rate mortgage resets.

How much can my ARM payment go up at the first reset?

It depends on your initial cap, which the CFPB says is commonly 2 or 5 percentage points. On a $300,000 loan that started at 5%, a 2-point jump to 7% raises principal and interest from about $1,610 to about $1,947, roughly $336 more a month. Our guide to adjustable-rate mortgage tips shows where your note lists all three caps.

When does an ARM reset happen?

At the end of the introductory fixed period named in the loan type. A 5/1 ARM resets after five years, a 7/1 after seven, a 10/1 after ten. After that, the rate adjusts on the frequency shown by the second number: every 12 months on a 5/1, or every six months on a 5/6 ARM tied to the 30-day average SOFR index. See how fixed and adjustable structures differ.

Can my ARM rate go down at a reset?

Yes. Resets move in both directions, and per-adjustment caps apply to decreases as well as increases. If the index falls, your rate drops to index plus margin automatically. There is a floor: on the ARMs Fannie Mae buys, the rate may never fall below the loan’s margin regardless of any downward cap. Our overview of fixed and adjustable structures explains why.

Should I refinance before my ARM resets?

Refinance if you plan to stay past the reset and a fixed rate prices at or near your current rate. Start shopping six to nine months out, so an appraisal or documentation delay does not push you past the adjustment date. If you expect to sell before the fixed period ends, riding out the ARM usually costs less. Our look at refinancing in a rising rate environment runs the break-even math.

The bottom line on ARM resets

An adjustable-rate mortgage reset recalculates your rate as index plus margin, applies the caps written into your note, and re-amortizes your balance over the years left on the term. On a $300,000 5/1 ARM that started at 5%, a 2-point first adjustment moves principal and interest from about $1,610 to about $1,947, and a 5-point lifetime cap bounds the worst case near $2,503. You will see it coming: the initial rate adjustment notice arrives at least 210 and no more than 240 days before that payment is due, with a confirming notice at least 60 days out.

If you’re ready to decide whether to ride out your reset or refinance ahead of it, talk to Align Lending. We’ll read your caps, run the worst-case payment, and shop your scenario across our lender network so you can compare both paths. Call 248-506-5727 or start online today.

Footnotes:

1. Example figures in this article are hypothetical and for educational purposes only; they do not constitute an advertisement of credit terms or a rate quote under federal or state lending laws. The $300,000, 5%, 30-year illustration assumes principal and interest only, no prepayments, and a full re-amortization of the remaining balance over the remaining 300 months at the adjusted rate. Your index, margin, caps, balance and adjusted payment will depend on your note and on market conditions on your adjustment date. Return to text.

2. Align Lending is not acting on behalf of or at the direction of FHA or HUD. FHA adjustable-rate interest rate adjustment limits and Secretary-approved indices are set by HUD in 24 CFR § 203.49 and in Mortgagee Letter 2023-09 and are subject to change. Return to text.

Figures current as of August 2026; verify current program limits and index requirements with the linked source before relying on them.

Sources: initial rate adjustment notice delivered at least 210 and no more than 240 days before the first payment at the adjusted level is due, and its required contents including the alternatives of refinancing, selling the property, modifying loan terms and arranging forbearance, the servicer telephone number and HUD counselor resources, 12 CFR § 1026.20(d). Subsequent rate adjustment notices delivered at least 60 and no more than 120 days before the first payment at the adjusted level is due, 12 CFR § 1026.20(c). Delivery of the Consumer Handbook on Adjustable-Rate Mortgages and the loan program disclosure at the time an application form is provided or before payment of a non-refundable fee, whichever is earlier, and the required program disclosure contents covering the index or formula, how rates and payments are determined, adjustment frequency, rate and payment limitations, negative amortization and interest rate carryover, 12 CFR § 1026.19(b). Definition of the fully indexed rate, the ability-to-repay payment calculation for adjustable-rate loans using the fully indexed rate or the introductory rate, whichever is greater, and the qualified mortgage calculation using the maximum interest rate that may apply during the first five years, 12 CFR § 1026.43(b)(3), (c)(5) and (e)(2)(iv). Initial adjustment caps commonly of 2 or 5 percentage points, subsequent adjustment caps most commonly of 1 or 2 percent, lifetime adjustment caps most commonly of 5 percent, and the availability of cap information on the Loan Estimate or Truth in Lending disclosure within three business days after application, Consumer Financial Protection Bureau, “What are rate caps with an adjustable-rate mortgage (ARM) and how do they work?” Hybrid ARM naming convention in which the first number is the length of the fixed-rate period and the second is the adjustment frequency, the definition of payment shock, the servicer’s obligation to notify the borrower of the first interest rate adjustment at least seven months in advance together with an estimate of the new rate and payment, the alternatives available and how to contact a HUD-approved housing counselor, the additional notice at least 60 days before a changed payment, and the caution that home prices do not always rise and a refinance may prove difficult, Consumer Financial Protection Bureau, Consumer Handbook on Adjustable-Rate Mortgages. Definition of the index as an interest rate that fluctuates with general market conditions, definition of the margin as percentage points added by the lender, the statement that the margin is set in the loan agreement and will not change after closing, the statement that the lender selects the index at application and that choice generally will not change after closing, and the formula index plus margin equals the interest rate subject to any rate caps, Consumer Financial Protection Bureau, “For an adjustable-rate mortgage (ARM), what are the index and margin, and how do they work?” Requirement that Fannie Mae ARM plans be tied to a 30-day average of the SOFR index published by the Federal Reserve Bank of New York, that each ARM plan carry lifetime and per-adjustment interest rate change limitations, that lifetime limitations apply to increases only while per-adjustment limitations apply to increases and decreases, and that the interest rate may never decrease below the ARM’s margin, Fannie Mae Selling Guide B2-1.4-02. Qualifying rate requirements of the maximum interest rate that could apply during the first five years for ARMs with an initial fixed-rate period of five years or less, and of no less than the note rate for ARMs with a longer initial fixed-rate period, with an exception requiring the greater of the note rate or the fully indexed rate for higher-priced mortgage loans and higher-priced covered transactions, Fannie Mae Selling Guide B3-6-04. FHA interest rate adjustment limits of one percentage point per adjustment and five percentage points over the life of the loan for one- and three-year ARMs, two percentage points per adjustment and six percentage points over the life of the loan for five-, seven- and ten-year ARMs, measured in either direction from the initial contract rate, and the prohibition on carrying over index changes above the cap, 24 CFR § 203.49(f). FHA Secretary-approved indices of the 1-year Constant Maturity Treasury index and the 30-day average SOFR index, HUD Mortgagee Letter 2023-09, dated May 2, 2023. End of U.S. dollar LIBOR panels after June 30, 2023 and identification of SOFR-based benchmark replacements under the Adjustable Interest Rate (LIBOR) Act, Board of Governors of the Federal Reserve System final rule, Regulation ZZ, 12 CFR Part 253. Current Primary Mortgage Market Survey coverage of 30-year and 15-year fixed-rate products and the retirement of its adjustable-rate series, Freddie Mac.

This article is for informational purposes only and is not intended to provide legal, financial, or tax advice. Index values, margins, rate caps, program rules and qualifying requirements change and vary by loan, lender and program; confirm your figures against your own note, adjustment notice and loan program disclosure, and consult a qualified professional about your situation. Figures shown are illustrative, are not a rate quote or an offer of credit, and are subject to change. Align Lending is an independent Michigan mortgage broker, NMLS #2041154.