By Tyler Plack
Tyler Plack is the Chief Executive Officer of South River Mortgage. He joined the company as a founding employee in 2017 and served as President before becoming CEO in 2026. Tyler holds an active FHA Direct Endorsement (DE) underwriting certification.
Reverse mortgage interest rates confuse a lot of people.
Not because they’re complicated. But because they work differently than traditional mortgages.
One of the biggest decisions you’ll make is choosing between a fixed rate and an adjustable rate.
Each option works differently. Each fits a different situation.
Let’s break it down in simple terms so you can make the right choice.
The Two Main Types of Reverse Mortgage Rates
There are two types of interest rates in a HECM reverse mortgage:
- Fixed rate
- Adjustable rate (ARM)
The difference isn’t just the rate itself. It also affects how you receive your money.
How Fixed-Rate Reverse Mortgages Work
A fixed-rate reverse mortgage locks in your interest rate for the life of the loan.
That sounds simple. And it is.
But there’s a trade-off.
With a fixed-rate HECM, you typically receive your funds as a lump sum only.
You don’t get:
- Monthly payments
- A line of credit
- Flexible draw options
This makes fixed-rate loans best for homeowners who want all their funds upfront.
When a Fixed Rate Makes Sense
A fixed rate may be a good fit if you:
- Want to pay off an existing mortgage right away
- Prefer predictable interest over time
- Don’t need ongoing access to funds
- Are concerned about rising interest rates
It’s simple and straightforward, but less flexible.
How Adjustable-Rate Reverse Mortgages Work
An adjustable-rate reverse mortgage (ARM) has an interest rate that can change over time.
But here’s what makes it powerful.
This option gives you flexibility in how you receive your money.
You can choose:
- A line of credit
- Monthly payments
- A lump sum
- Or a combination of all three
That flexibility is why most reverse mortgages today are adjustable.
How Adjustable Rates Actually Change
Adjustable rates are tied to a financial index plus a margin.
They typically adjust:
- Monthly or annually
- Within capped limits
- Based on market conditions
There are limits on how much the rate can increase, which helps control long-term risk.
The Big Advantage: Line of Credit Growth
This is where adjustable-rate reverse mortgages really stand out.
If you choose a line of credit, the unused portion doesn’t just sit there.
It grows over time.
That growth is tied to:
- Your interest rate
- Mortgage insurance
- Loan terms
In simple terms, your available borrowing power increases each year.
This can be extremely valuable for long-term planning.
Check your eligibility
A few details to help us understand your options.
Why Line of Credit Growth Matters
The line of credit can:
- Increase your available funds over time
- Act as a backup for future expenses
- Help cover healthcare or long-term care later
- Reduce the need to tap into savings during market downturns
Many homeowners use this as a strategic financial tool, not just a loan.
Fixed vs Adjustable: Side-by-Side
Here’s a simple way to compare them:
Fixed Rate
- Locked interest rate
- Lump sum only
- No line of credit
- Less flexibility
Adjustable Rate
- Rate can change over time
- Multiple payout options
- Line of credit available
- Credit line can grow
Which One Is Better?
There’s no one-size-fits-all answer.
It depends on your goals.
Choose a fixed rate if you want simplicity and a one-time payout.
Choose an adjustable rate if you want flexibility, long-term access to funds, and the ability to grow your available credit.
Most borrowers choose adjustable rates because of the flexibility and planning advantages.
The Bottom Line
Reverse mortgage interest rates aren’t just about cost.
They shape how you use the loan.
A fixed rate gives you certainty. An adjustable rate gives you flexibility and growth potential.
Understanding the difference helps you make a smarter decision for your retirement.
See What You May Qualify For
The best way to understand your options is to see real numbers based on your home and your goals.
You can get a personalized estimate in seconds using our free calculator.
There’s no obligation and no pressure.
Get your instant reverse mortgage quote today and see what may be possible.
FAQ – Reverse Mortgage Interest Rates
Is a fixed or adjustable rate better for a reverse mortgage?
It depends. Fixed is simpler. Adjustable offers more flexibility and long-term benefits.
Can my adjustable rate go up a lot?
There are caps that limit how much it can increase over time.
Why do most people choose adjustable rates?
Because they allow for a line of credit and flexible payout options.
Does the line of credit really grow?
Yes. The unused portion increases over time based on loan terms.
Can I switch from fixed to adjustable later?
Not directly. You would need to refinance into a new loan.
Do higher rates reduce how much I can borrow?
Yes. Higher interest rates can reduce your available loan proceeds.
