Age sits at the center of every Home Equity Conversion Mortgage (HECM) transaction. It’s the single most important eligibility requirement: the borrower must be 62, or older, and many lenders won’t even begin an application until the youngest borrower on title meets that threshold. But age isn’t calculated the way most people assume. HUD only counts whole years. So, a 69-year-old who will turn 70 within six months of closing is treated as if they’re already 70.
Why does this matter so much? Because age directly drives the “principal limit factor,” or PLF, the percentage of a home’s value a borrower can access. Older borrowers generally qualify for larger principal limits because actuarial life expectancy shortens the loan’s projected duration. But this rule has real exceptions. A 71-year-old, for instance, doesn’t currently receive more than a 70-year-old. And anyone over 97 today has already hit the maximum PLF percentage available. So, additional aging brings no further benefit unless interest rates happen to fall before closing.
THE “WAIT UNTIL I’M OLDER” TRAP
Because higher ages generally mean higher proceeds, many homeowners delay getting a reverse mortgage, assuming they’re securing better terms down the road. It feels intuitive. But research from academics like Barry Sacks, Wade Pfau, and John Salter suggests this “last resort” strategy is often a mistake. Once you understand how the HECM program behaves over time, waiting rarely pays off the way people expect.
WHAT WAITING ACTUALLY COSTS
In a previous article, Waiting Doesn’t Pay with a Reverse Mortgage, Jeff Birdsell laid out the real risks of delaying, like rising interest rates, declining home values, and the possibility that program guidelines tighten before you apply. Meanwhile, opening a HECM earlier gives homeowners the powerful advantage of compounded line-of-credit growth, which increases available liquidity over time.
The numbers make the case. Assuming the HECM program stays the same, home values hold steady, and interest rates remain constant, the incremental benefit of being a year older averages less than 1% more in principal. Consider a 69-year-old who waits three years until age 72. At an expected rate of 6.50%, that three-year wait increases the calculated principal by just 0.6%.
Compare that meager gain to what happens if the same homeowner opens the HECM at 69 instead. For borrowers with an adjustable-rate HECM, the principal limit on an unused line of credit grows every year at the current interest rate plus 0.5%. This is a far more substantial increase.
THE BOTTOM LINE
No one should feel rushed into a reverse mortgage. But the data is clear: banking on advancing age to unlock more money is largely a myth. The real growth engine in a HECM isn’t the borrower’s age—it’s time spent with the line of credit already open and compounding. For homeowners weighing when to apply, understanding this dynamic can mean the difference between years of missed liquidity and a strategy that actually builds long-term security.