The Reverse Mortgage Line of Credit
Most people picture a reverse mortgage as a last resort. The line of credit option turns that picture upside down: it works best for people who do not need the money yet.
By Morgan Hayes · August 2026
If you own your home outright, or close to it, and your bills are covered, you have probably dismissed reverse mortgages in about four seconds. The reasoning feels airtight: those are for people who need cash, and I do not.
That reasoning is exactly why the reverse mortgage line of credit stays obscure. It is the one version of the product designed for people who do not need the money today. Opened early and left alone, it functions less like a loan and more like a reserve: a pool of borrowing power tied to your home that grows every year and, unlike a bank credit line, cannot be taken away once it is established.
We spent time going through the mechanics of how this actually works under the federal HECM program, because the growth feature in particular sounds too generous to be real. It is real. It is also widely misunderstood, so it is worth walking through carefully. For the full product overview first, start with how reverse mortgages actually work.
Part One
Three Ways to Take the Money, and One Almost Nobody Picks Deliberately
A Home Equity Conversion Mortgage, the federally insured version of a reverse mortgage available to homeowners 62 and older, does not hand you a single check by default. You choose how the proceeds are structured, and you can combine methods.
Lump sum
A single draw at closing, available only on fixed-rate HECMs. Simple, but the money starts accruing interest immediately, whether you needed all of it or not.
Monthly payments
Term payments (a set amount for a set number of years) or tenure payments (a set amount for as long as you live in the home). Useful for filling a predictable income gap.
Line of credit
Borrowing capacity you draw on when you choose, in the amount you choose. You pay interest only on what you actually draw. The rest just sits there, and this is the part most people miss: it grows.
Combinations are allowed: some borrowers take a small monthly payment plus a credit line, for example. But the line of credit is the least understood of the three, and in our reading of the retirement research, it is often the smartest, precisely because of what happens to the portion you never touch.
Part Two
The Growth Feature, Explained Without the Sales Gloss
Here is the mechanic. The unused portion of a HECM line of credit grows over time at the loan's note rate plus the 0.5 percent annual mortgage insurance premium. At current rates, in an environment that has eased but is not low, that works out to roughly mid-to-high single digits percent per year.
Read that again, because it is the opposite of how every other credit product works. Your available borrowing power compounds upward, year after year, regardless of what your home is worth and regardless of what the housing market does.
Worth knowing
The growth is not interest you earn, and it is not cash. It is an increase in how much you are allowed to borrow. Nothing is owed on it until you actually draw funds. But as a planning tool, the effect is similar to holding a reserve asset that expands on its own.
To make the math concrete: a credit line left completely untouched can roughly double over about a decade at current growth rates. That figure is an informational illustration of the compounding mechanic, not a projection of any individual's numbers, which depend on the rate on your specific loan and when you open it. But the direction is not in question. Untouched capacity grows, and the earlier the line is opened, the longer it compounds.
"The unused portion grows every year, and the lender cannot take it away. No other credit product tied to your home works this way."
The second half of the feature matters just as much: once a HECM line of credit is established, the lender cannot freeze it or reduce it, as long as you meet the basic obligations of the loan, meaning you live in the home and keep up with property taxes, homeowners insurance, and maintenance. There are no monthly mortgage payments required while you live there. The credit you have built is contractually yours to draw, in good markets and bad.
Part Three
The Standby Strategy: Why Researchers Say Open It Early
The retirement-income research community gave this approach a name years ago: the standby reverse mortgage. The strategy has three steps, and the third one is the hard part. First, open the line of credit early, soon after 62, while you demonstrably do not need it. Second, leave it untouched and let the available credit compound. Third, draw on it only in specific, pre-planned situations.
The classic trigger is a market downturn. If your retirement portfolio drops 20 percent, selling investments to fund living expenses locks in the loss. Drawing from the credit line instead lets the portfolio recover before you sell anything. Researchers call this managing sequence-of-returns risk, and several published studies have found that portfolios paired with a standby credit line lasted longer than portfolios that stood alone.
The second trigger is later-life care. In-home care and similar costs tend to arrive in your late 70s or 80s, precisely when a line opened at 62 has had 15 or more years to grow. A homeowner who set up a line early is not scrambling to qualify for financing at 83. The capacity is already sitting there, larger than when it started.
What we found
In our research, the pattern that separates satisfied borrowers from regretful ones was timing and intent. People who opened a credit line early, as a deliberate piece of a plan, described it as one of the better financial decisions they made. People who arrived at a reverse mortgage under pressure, needing cash immediately, had far more mixed experiences. The product was the same. The posture was not.
Part Four
The HELOC Comparison, in Four Sentences
The natural objection from a planner is: I could just open a HELOC. Here is the tight version. A HELOC can be frozen or reduced by the bank whenever it sees risk, which historically has happened at exactly the moments people needed it, and it comes with a draw period that expires, followed by required repayment. A HECM line of credit cannot be frozen or reduced once established, never expires while you live in the home, requires no monthly payments, and its unused capacity grows instead of sitting flat.
The HELOC is cheaper to open. The HECM line is more durable to hold. Which trade-off wins depends on how long you plan to hold it, and we walk through the full decision in our side-by-side comparison of the HECM line of credit and a HELOC.
Part Five
Who This Actually Fits
The line of credit strategy is not for everyone, and the profile it fits is fairly specific. It fits homeowners 62 or older whose home is paid off or nearly so, since existing mortgage balances must be paid off from the proceeds and a large balance consumes the capacity that would otherwise grow. It fits people planning to stay in the home ten or more years, because the upfront costs of a HECM, including mortgage insurance and origination fees, amortize into insignificance over a long holding period and sting over a short one. And it fits people whose regular income already covers their bills, since the entire point is to leave the line untouched and let it compound.
For 2026, the FHA lending limit for HECMs is $1,249,125, which means the program accommodates a wide range of home values, well beyond the modest homes people often associate with the product.
If you plan to sell within a few years, if you are counting on this money for routine monthly expenses, or if keeping the home in the family free and clear is your top priority, other tools deserve a look first. The standby line of credit rewards patience. It is a planner's instrument, which is probably why the people best positioned to use it are the ones who dismissed it in four seconds. Whether the broader product makes sense for your situation is covered in when a reverse mortgage is a good idea, and when it is not.
Common Questions
Questions About the Credit Line
How fast does a reverse mortgage line of credit grow?
The unused portion of a HECM line of credit grows at the loan's note rate plus the 0.5 percent annual mortgage insurance premium. At current rates, that is roughly mid-to-high single digits percent per year. The exact figure depends on your specific loan's rate, and because most HECM credit lines carry adjustable rates, the growth rate changes over time as rates move.
Can the bank freeze a reverse mortgage line of credit?
No. Once a HECM line of credit is established, the lender cannot freeze it, reduce it, or cancel it, as long as you meet the loan's obligations: living in the home as your primary residence and keeping up with property taxes, homeowners insurance, and basic maintenance. This is a key difference from a HELOC, which a bank can freeze at its discretion.
Do I pay interest on a credit line I never use?
No. Interest and mortgage insurance accrue only on funds you actually draw, plus the loan's upfront costs that were financed. The unused portion of the line costs nothing to maintain on a monthly basis and grows while it sits.
What happens to the credit line if home values fall?
Nothing. The growth of an established HECM credit line is contractual and is not tied to your home's market value. If home prices decline after your line is set up, your available credit keeps growing anyway. This is one reason researchers suggest opening the line earlier rather than later.
Is money drawn from a reverse mortgage line of credit taxable?
Loan proceeds are generally not treated as taxable income because they are borrowed funds, not earnings. However, tax situations vary, and draws can interact with other parts of your financial picture, so speak with a tax professional or financial advisor about your specific circumstances before making decisions.
The Bottom Line
A Reserve That Grows While You Ignore It
The reverse mortgage line of credit inverts the product's reputation. It is not a tool for people who have run out of options. It is a tool for people who want more of them: a contractually protected reserve, tied to the largest asset most homeowners 62+ own, that compounds upward every year it goes unused and cannot be withdrawn by the lender.
The strategy asks very little of you, which may be why it gets so little attention. Open it early, understand the costs going in, leave it alone, and let time do the arithmetic. If your home is paid off, your income covers your life, and you intend to stay put for a decade or more, this deserves a place in the conversation with your advisor, not because you need it today, but precisely because you do not.
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