What the HECM line of credit is

A HECM (Home Equity Conversion Mortgage) line of credit is one of the ways you can take proceeds from a reverse mortgage. Instead of receiving a lump sum or monthly payments, you open a credit line backed by the equity in your home.

When you draw from it, you are borrowing against home equity. When you do not, the unused portion sits available for whenever you need it.

The feature almost no one understands: the growth rate

This is the piece that changes how planners talk about reverse mortgages.

The unused portion of your HECM line of credit grows over time. It compounds monthly at the current note rate plus 0.5%. That is not interest you owe — it is borrowing capacity that expands.

Said plainly: the longer you keep the line open without drawing heavily on it, the more you can eventually borrow. The growth is not guaranteed to outpace inflation or investment returns, but it does expand the available credit in a way that a traditional HELOC does not.

This is why retirement researchers (the credentialed, non-sales kind) have spent the last decade rethinking reverse mortgages. The HECM LOC is not the dusty product advertised on late-night television. It is a tool worth knowing about even if you never need it.

Why it is a planning weapon, not just a safety net

The instinct most families have is: “We will tap home equity only if everything else runs out.” That instinct is understandable. It also leaves one of your largest assets sitting idle.

Thoughtful advisors flip the sequence. They open the HECM line early — sometimes in the mid-60s — and let the growth rate compound untouched. When a real need arises (unexpected medical costs, a down market year where you do not want to sell stocks, a long-term care bridge), the line is there and meaningfully larger than it was on day one.

This is the concept researchers call a standby line of credit. You may never draw it. The value is in having it available at a size proportional to where you are in retirement.

HECM LOC vs. HELOC: the differences that matter

The last row in that table is the one most retirees underappreciate. A HELOC is a contract the bank can change on you. The HECM line of credit, once it is open and in good standing, is yours. That durability is part of the reason planners treat it as a reliable cushion.

When to open the line: early or late?

Early (mid-60s to early 70s)

Opening the line early gives the growth rate the most time to compound. You lock in today's home equity as collateral. If home values soften later, the line you already opened is unaffected.

Trade-offs: you pay the upfront costs earlier, and the mortgage insurance premium starts accruing.

Late (late 70s+)

Opening the line late makes sense if you want to wait and see — maybe a pension covers everything, maybe the investment portfolio is performing, maybe there is no foreseeable need. You can still open the line later and use it. You just give up the compounding window.

A middle path

Many families open the line at a quieter moment — after the youngest children are financially independent, before major medical concerns — and simply let it grow. They may never draw. That is still a win.

Who the HECM LOC is a bad fit for

This article would be incomplete without naming where the tool is wrong.

• Families planning to move within a few years. The upfront costs rarely pencil if the home will be sold before the line gets much use.
• Borrowers who cannot cover taxes, insurance, and upkeep. These ongoing obligations are part of keeping the loan in good standing.
• Households where a younger spouse is on title but not yet 62. There are protections for eligible non-borrowing spouses, but the dynamics need careful counsel before signing.

A note on taxes

Draws from a HECM line of credit are generally not considered taxable income because they are loan proceeds, not earned or investment income. This is why some retirement researchers pair HECM draws with Social Security and Roth strategies. We are mortgage professionals, not tax advisors — confirm the specifics with your CPA.

The honest summary

The reverse mortgage line of credit is not the right tool for every household. For the households where it fits, it is one of the most resilient and flexible retirement assets they can create — and the earlier it is set up, the more it can grow.

If you want to know whether it fits yours, the next step is a real conversation.

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