Mortgage · PMI Rules
Can You Cancel PMI on an Adjustable-Rate Mortgage?
Adjustable-rate mortgages follow the same federal PMI cancellation rules as fixed-rate loans, but rate changes can complicate the math. Here is how the 80% and 78% thresholds actually work when your payment moves every year.
The Homeowners Protection Act treats ARMs and fixed loans the same way
The federal law that governs most private mortgage insurance cancellation, the Homeowners Protection Act, does not carve out an exception for adjustable-rate mortgages. Whether your rate is fixed for thirty years or resets every twelve months, the same two triggers apply: a borrower-requested cancellation once your loan balance reaches 80% of the home's original value, and an automatic termination once it reaches 78%.
That said, an ARM adds a variable most fixed-rate borrowers never deal with: a payment that changes on a schedule set by your note, tied to an index plus a margin. The cancellation math does not care about your payment amount directly. It cares about your loan balance compared to the home's original value. Your servicer's own paperwork is the final word on how your specific loan calculates these thresholds.
Why a moving payment doesn't move the 80% line
Loan-to-value, or LTV (the loan balance divided by the home's value), is calculated two ways under the law: using your original amortization schedule, or using your actual unpaid balance if you have made extra principal payments. On a standard ARM, principal still reduces on schedule between rate adjustments, so the 80% point arrives at roughly the same month it would on a comparable fixed loan with the same starting balance and term.
Here is a simple illustration. Say a loan started at $300,000 against a $330,000 appraised value, an LTV close to 91%. On the scheduled amortization, the balance needs to fall to $264,000 to hit 80% LTV. Whether the interest rate on that balance is fixed or adjusts every year, the scheduled principal balance crossing $264,000 is what matters for a borrower-requested cancellation request, not what the monthly payment happens to be that month.
Automatic termination at 78% still happens on the calendar, not the coupon
The Homeowners Protection Act also requires automatic termination once your scheduled balance hits 78% of original value, as long as you are current on payments. This trigger fires by date, based on your original amortization schedule, regardless of how your ARM's rate has moved in the meantime. A rate increase does not push this date back, and a rate decrease does not pull it forward, because the schedule is fixed at closing even though the rate is not.
If you want to check where your loan stands against these thresholds before contacting your servicer, the free PMI Cancellation Checker walks through the same math using your original loan details.
Interest-only and payment-option ARMs are the real exception
The honest limit here involves loan structure, not rate type. Some ARMs, particularly interest-only ARMs or older payment-option ARMs, do not reduce principal on the normal schedule. An interest-only period means your balance stays flat, so neither the 80% nor the 78% threshold arrives on the timeline a standard amortization table would suggest. A payment-option ARM that allows negative amortization can actually increase your balance, moving you further from cancellation rather than closer.
If your ARM has ever had an interest-only period or a minimum-payment option, check your amortization schedule against your current balance before assuming you are on track. This is exactly the kind of detail the complete PMI cancellation playbook walks through step by step, including how to request your amortization schedule from your servicer.
Appraisal-based cancellation follows investor guidelines, not your rate type
Beyond the federal floor, many conventional loans allow earlier cancellation if a new appraisal shows enough value appreciation to bring you under 80% or 75% LTV, depending on how long you have owned the home. These rules come from the loan investor's servicing guide, not the rate structure. Both Fannie Mae and Freddie Mac publish servicing standards that apply the same appraisal-based path to ARMs and fixed-rate loans they own or service.
The catch is that appraisal-based cancellation is not required by federal law the way the 80% and 78% triggers are. Your servicer can require a specific appraisal, charge for it, and deny the request if the numbers do not support it. That is a lender-specific process layered on top of the federal minimum, and it is worth confirming in writing before you pay for an appraisal.
What to check before you contact your servicer
Pull your original amortization schedule and compare it to your current balance. If your ARM has never had an interest-only or minimum-payment feature, the standard 80% and 78% math applies just as it would on a fixed loan. If it has, you will need your actual balance history, not the original schedule, to know where you stand.
The CFPB's guidance on removing PMI lays out your rights under the Homeowners Protection Act in plain terms, including what your servicer is required to tell you each year about your cancellation date. When you are ready to put a request in writing, the free cancellation letter template gives you a starting point that references the same statutory language. This is not financial or lending advice.
Questions people ask
Does a rate adjustment on my ARM delay my PMI cancellation date?
No, not by itself. The 78% automatic termination date is set by your original amortization schedule at closing, and a rate change does not move that schedule. It only changes if your loan structure means principal does not reduce as scheduled, such as during an interest-only period.
Can I request PMI cancellation on an ARM before the automatic 78% date?
Yes, borrower-requested cancellation at 80% LTV works the same way on ARMs as fixed-rate loans under the Homeowners Protection Act. You typically need to be current on payments and may need to show a good payment history to your servicer.
What if my ARM has an interest-only period and my balance isn't dropping?
During an interest-only period, your principal balance may stay flat or even grow slightly with certain payment-option ARMs, which delays reaching the 80% and 78% thresholds. Checking your actual balance against your original schedule, rather than assuming standard amortization, is the only way to know where you stand.
Do I need a new appraisal to cancel PMI on an ARM?
Not for the automatic 78% termination, which relies on your original schedule. A new appraisal is only relevant if you are pursuing earlier cancellation based on value appreciation, which follows your loan investor's servicing guide rather than a federal requirement.
Sources
- GovInfo: Homeowners Protection Act of 1998 (U.S. Code)
- Fannie Mae: Servicing guidelines
- Freddie Mac: Servicing guidelines
- Federal Reserve: PMI information
This article is educational and is not financial or lending advice. Some links in our articles may earn us a commission at no cost to you, and never change what we recommend.
