Aging in Place vs Assisted Living With Mortgage Rates Above 7%: The 5-Year NPV Math and the Care-Hour Point Where It Flips
Here's a scenario I keep running for friends. Their mom is 81, still in the house she's lived in for 30 years, and needs help with two activities of daily living (bathing and getting dressed). Someone in the family says, "Let's just keep her home, it's cheaper." Someone else says, "We should move her before something happens." Both feel right. Neither has done the math.
The math depends on a few variables that moved this month. Let's go through them, run a worked example, and see where the answer flips.
What changed in the market this week
Three of the articles I pulled for this post matter for a care decision.
Borrowing is expensive. NerdWallet's Mortgage Rates Today, Friday, September 25 says rates fell a little today but are "still solidly above 7%." Its explainer, Why the Bond Market's Struggles Are Driving Up Mortgage Rates, ties that to inflation, an AI borrowing boom, and rising government debt pushing bond yields to their highest levels in 20 years. If your plan to age in place involves a HELOC or a cash-out refinance for home modifications, you're borrowing at those prices. HELOC rates aren't the same as 30-year mortgage rates, but they tend to move in the same direction.
Prices are still rising. The Bureau of Labor Statistics' Major Economic Indicators page shows the Consumer Price Index up 0.4% in August 2026. A simple annualization of one month is rough (0.4% × 12 ≈ 4.8%), and one month isn't a trend. But care contracts, assisted living rate cards, and home services all reprice, so it's worth stress-testing.
Labor is loosening a little. The same BLS page shows unemployment at 4.1%, payroll employment up 162,000 (preliminary), and average hourly earnings up just $0.10 (preliminary). That matters because in-home care is mostly labor. If aide wages stay soft, the hourly rate you're quoted may rise slowly. That's a point in favor of aging in place, though it isn't guaranteed.
Then there's your portfolio. Mr. Money Mustache's Will the AI Bubble Destroy our Retirement? is about how the market keeps surprising us, in both directions. For a care decision, that raises a practical question: if your parent's care is funded from investments, what happens if you're forced to sell after a drop? That is sequence risk, and it's a real variable in the analysis below.
The worked example (labeled clearly: these are my assumptions, not your numbers)
Assumptions for a hypothetical 81-year-old:
- Care needs start at 25 hours/week and escalate as ADLs decline: 25, 30, 40, 50, 60 hours/week over years 1–5.
- Aide rate: $33/hour (the figure I've used in earlier Dorevanti analyses; substitute your local quote).
- Home carrying costs (taxes, insurance, utilities, upkeep): $14,000/year.
- Home modification (bathroom, ramp, grab bars): $25,000 upfront, borrowed on a HELOC at 7.1% interest-only. That rate is my assumption, in line with "above 7%" mortgage headlines.
- Assisted living all-in (base rent plus care add-ons as needs grow): $78,000, $88,000, $96,000, $104,000, $112,000 across years 1–5.
- Discount rate: 5%, end-of-year cash flows. The home is sold in the assisted living scenario and the proceeds are set aside, which I'm not counting in either column.
Aging in place, year by year
| Year | Hours/week | Aide cost | + Home costs | Total |
|---|---|---|---|---|
| 1 | 25 | $42,900 | $14,000 | $56,900 |
| 2 | 30 | $51,480 | $14,000 | $65,480 |
| 3 | 40 | $68,640 | $14,000 | $82,640 |
| 4 | 50 | $85,800 | $14,000 | $99,800 |
| 5 | 60 | $102,960 | $14,000 | $116,960 |
Present value of those five years at 5%: about $358,700. Add the $25,000 modification and about $7,700 in present-value HELOC interest ($1,775 a year), and aging in place comes to roughly $391,400.
Assisted living
Discounting $78k, $88k, $96k, $104k, and $112k at 5% gives roughly $410,300.
The result
| 5-year NPV | |
|---|---|
| Aging in place (with modification and HELOC interest) | ~$391,400 |
| Assisted living | ~$410,300 |
| Gap | ~$18,900 in favor of aging in place |
So the "keep her home" instinct wins here, but not by much. The year-by-year totals show why it's fragile. In year 5, aging in place ($116,960) costs more than assisted living ($112,000). The crossover happens inside the horizon, and the discounting is hiding it.
This is the kind of analysis Dorevanti runs for you, so you don't have to build the spreadsheet yourself.
Sensitivity: the one variable that swings it
Now change one thing. Suppose ADL decline is faster and care hours run 10 hours/week higher every year (35, 40, 50, 60, 70).
- Extra cost per year: 10 × 52 × $33 = $17,160
- Present value of that extra over five years at 5%: about $74,300
- New aging-in-place NPV: about $465,700
- Assisted living stays at about $410,300
The verdict reverses: assisted living is now cheaper by roughly $55,400. A 10-hour-a-week difference in care needs moves the result by about $74,000, which is far bigger than anything the bond market did to your HELOC rate.
That's why I don't trust rules of thumb. If you want to see how the flip point moves with hours and ADL levels, I covered it in Aging in Place vs Assisted Living: The Real 2026 Cost Crossover at 25, 40, and 60 Care Hours Per Week. For the step-by-step formula behind the table above, see How to Calculate Your Aging-in-Place vs Assisted Living Cost Crossover: The 5-Step NPV Formula.
How today's rates and prices change the example
Here is how each market move plays out in the model. These are directional effects, not measured results.
| Market condition | Effect on aging in place | Effect on assisted living |
|---|---|---|
| Mortgage and HELOC rates above 7% | Raises modification financing cost; small in my example (about $1,775/year on $25,000) but large if you're borrowing $80,000+ for a major renovation | Raises the cost of carrying a home you're trying to sell, and can slow buyers |
| August CPI +0.4% | Home costs and aide rates reprice upward | Annual rate increases at the community may be steeper; ask for the last three years' history |
| Average hourly earnings up only $0.10 | Softer aide wage pressure; mildly favorable | Indirectly favorable too, since facilities also run on labor |
| Unemployment at 4.1% | A loosening labor pool may make aides easier to find | Same |
| Bond yields at 20-year highs | A higher discount rate makes back-loaded costs (the year 4–5 spike in home care) look smaller in present value, which flatters aging in place | Assisted living's costs are more front-loaded, so it looks relatively worse |
That last row is worth pausing on. A higher discount rate can make the aging-in-place option look better on paper because its worst years are furthest away. If your parent's decline is fast, those years arrive sooner than the model assumes, and the discount rate's flattering effect disappears. NPV is only as honest as your care-hours curve.
The hidden costs that don't appear in either column
Both options have costs a quick comparison leaves out.
Aging in place:
- Overnight or 24-hour needs, which can price above assisted living quickly.
- Caregiver turnover, agency minimum shifts, and backup coverage when an aide calls out.
- Family caregiver burnout, which has a real cost even when nobody sends an invoice.
- Home insurance, property tax, and repair costs that keep running regardless of care.
Assisted living:
- Level-of-care add-ons (my example builds these in, but many communities price them in tiers).
- One-time community or move-in fees.
- Annual rate increases.
- If memory issues progress, a second move to memory care, which can cost more than assisted living. I compare those in Aging in Place vs Assisted Living vs Memory Care vs Nursing Home: The NPV Gap Ranges From -$116,000 to +$298,000 Over 10 Years.
Benefits that can shift the answer
VA Aid & Attendance. If your parent is a wartime veteran (or surviving spouse) with qualifying care needs and limited countable assets, the benefit can be applied against either home care or assisted living. It doesn't pick a winner, but it changes the net figures on both sides, and the application takes time. Check eligibility early. Don't wait until you're already in a crisis.
Medicaid spend-down. If a long stay looks likely, the question isn't only "which is cheaper" but "how long does the money last, and what does the state look back at?" Medicaid generally reviews past asset transfers, so gifting money to family "to protect it" can backfire. An elder law attorney is worth an hour of your time here. Model the timeline first, so you know when the money runs out under each option.
Life expectancy. A five-year horizon isn't neutral. If your parent's expected time in care is 2 years, the $25,000 modification is a bad deal per month of use. If it's 10 years, upfront costs get spread thin, but year 6–10 escalation dominates. Adjust the horizon to their health, not the actuarial average.
Where the portfolio and bank-account articles fit
The Mr. Money Mustache piece is about the AI-driven market and what it means for retirement. The relevance here is that a care plan often draws from a portfolio at exactly the wrong moment. If you fund $80,000–$115,000 a year from investments and the market drops, you sell shares at a low price to pay the bill. Consider holding the first 12–24 months of projected care costs in cash or short-term instruments, so a bad year for stocks doesn't force a bad decision about care.
On that cash: NerdWallet's Should I Switch to a New Bank Just to Earn a Bonus? is a useful gut-check. Bonuses take effort (deposit requirements, holding periods), and against a six-figure care budget a bonus is small. It might be worth it for the extra hours of paperwork if the cash is idle anyway. It isn't worth destabilizing autopay for a parent's bills. Treat it as a bonus, not a strategy.
A 10-minute checklist before you decide
Write these down, then check them against real quotes:
- Current ADL losses (bathing, dressing, toileting, transferring, continence, eating) and how quickly they've changed in the last 12 months.
- Weekly care hours today, and your honest guess for hours in years 2, 3, 4, and 5.
- Local aide rate, from an actual agency quote. Check whether there are 4-hour minimums.
- Assisted living quote in writing, including level-of-care pricing and the last three annual rate increases.
- Home modification bids (not estimates), and how you'd pay: cash, HELOC, or refinance. At today's rates, get the actual number.
- Life expectancy adjustment: ask the physician about realistic timelines, not averages.
- Benefit eligibility: VA Aid & Attendance, long-term care insurance, and Medicaid planning.
- The trigger point: at what hours per week, or which ADL loss, would you reassess?
For a fuller decision structure, the 5-Gate Decision Framework for moving from aging in place to assisted living walks through triggers like these.
But your numbers will differ
The example above lands at an $18,900 edge for aging in place, and one changed assumption (10 more hours a week) turns it into a $55,400 edge for assisted living. Home size, local wages, whether the house is paid off, whether a spouse is at home, VA eligibility, and health trajectory can each swing the result by tens of thousands. I made up every input in that example and labeled it as such. Please don't copy my $33 an hour or my five-year escalation curve into your own decision.
Neither option is "right." Aging in place tends to win when needs are modest, a family member is involved, and the house is already suitable. Assisted living tends to win when needs climb past roughly the point where round-the-clock coverage is required, or when isolation and safety are the bigger risks. Whichever you choose, choose it with your own numbers.
Run it for your situation
With rates above 7%, bond yields at 20-year highs, and inflation still moving, this is a good week to replace a gut feeling with a calculation. You can model your parent's ADL decline, care hours, local rates, benefits, and time horizon at Dorevanti. It takes the numbers you have, shows where the two options cross over, and lets you see how far that point moves if you're wrong about something. Do that before the next crisis, not during it.
Sources
- Will the AI Bubble Destroy our Retirement? — Mr. Money Mustache
- Major Economic Indicators Latest Numbers — Bureau of Labor Statistics
- Should I Switch to a New Bank Just to Earn a Bonus? — NerdWallet
- Why the Bond Market’s Struggles Are Driving Up Mortgage Rates — NerdWallet
- Mortgage Rates Today, Friday, September 25: A Little Relief, but Still Above 7% — NerdWallet