Aging in Place vs Assisted Living at 7%+ Mortgage Rates: Why a $141,067 Gap Shrinks to $5,969 Once You Count Home Equity
Picture a 78-year-old widow who owns her house outright. She needs help with two activities of daily living (bathing and getting around safely) and expects a third to go within about three years. Her daughter has a spreadsheet open and two tabs: "Stay home" and "Move to assisted living." Stay-home looks cheaper on the first tab. Then the daughter adds one line she almost left out, which is what the house's equity could earn if it were sold. The gap between the tabs nearly disappears.
That one line comes from an unexpected place. In NerdWallet's piece I Edit Mortgage Advice for a Living — and Still Rent, a 54-year-old mortgage content editor lays out why she rents. She weighs the down payment, what that money could earn invested, and the true price of owning. That is the same logic that decides whether a paid-off house is "free" for someone who needs care. Capital tied up in a home has a cost, even when no bill arrives for it.
This post runs a full head-to-head with that logic included. Every dollar figure below comes from an example I constructed and labeled as such. The point is to show the structure of the calculation and which inputs swing it. Your numbers will differ based on your specific situation, and some of the differences will be large.
The Example: Two Paths, Same Person, Same Needs
Assumptions (all illustrative):
- Home value: $400,000, no mortgage
- Home modifications (walk-in shower, ramp, grab bars, lighting): $18,000, paid in cash up front
- Home carrying costs (property tax, insurance, maintenance, utilities): $14,150/year
- In-home aide rate: $33/hour
- Care hours per week: 20 in years 1-2, 35 in years 3-4, 56 in years 5-10
- Assisted living: $6,000/month base, plus $1,500/month care add-on at 2 ADL losses and $3,000/month at 3
- Cost to sell the house and move: $27,000 (about $24,000 in selling costs plus $3,000 in moving)
- Everything in today's dollars, discounted at a 2% real rate (each year's cost multiplied by 1.02⁻ⁿ, where n is the year)
- Sale proceeds, if invested, earn 4% real on the $376,000 left after selling costs, which is $15,040/year
Annual costs by phase:
| Phase | Stay home (care + carrying) | Assisted living |
|---|---|---|
| Years 1-2 | $34,320 + $14,150 = $48,470 | $90,000 |
| Years 3-4 | $60,060 + $14,150 = $74,210 | $108,000 |
| Years 5-10 | $96,096 + $14,150 = $110,246 | $108,000 |
The row that matters is years 5-10. Once she needs 56 hours a week of paid help, staying home costs more per year than the facility. That is the crossover. The question is whether it arrives early enough to erase the head start.
The Head-to-Head Result
Discounting each phase and adding the up-front items:
| Stay home | Assisted living | |
|---|---|---|
| PV of years 1-2 | $94,107 | $174,740 |
| PV of years 3-4 | $138,489 | $108,000 × 1.86617 (with years 5-10, below) |
| PV of years 3-10 (AL) / 5-10 (home) | $570,508 | $760,431 |
| Up-front items | $18,000 (mods) | $27,000 (sale and move) |
| 10-year NPV | $821,104 | $962,171 |
Aging in place is ahead by $141,067 over 10 years. If you stopped here, you would tell everyone to stay home.
Now add the line the editor's article teaches. Selling the house frees $376,000 that can earn something. At a 4% real return, that is $15,040 a year, worth $135,098 in present value over ten years. Staying home means giving that up.
Adjusted gap: $141,067 − $135,098 = $5,969. That is a rounding error against $800,000+ of spending. Whether the two options tie depends entirely on the return you assume on the equity, so I'd treat that gap as fragile rather than as a verdict.
This is the kind of analysis Dorevanti runs for you, so you don't have to build the spreadsheet yourself.
Why the Time Horizon Changes the Answer
Home care costs escalate with ADL decline, while facility fees are flatter. That makes the length of the projection matter a great deal. Here are the same assumptions cut at 5 years:
| Horizon | Stay home NPV | Assisted living NPV | Gap before equity | Gap after equity |
|---|---|---|---|---|
| 5 years | $350,448 | $501,105 | $150,657 | $79,766 |
| 10 years | $821,104 | $962,171 | $141,067 | $5,969 |
At five years, staying home wins clearly even after counting equity. At ten years, it barely wins. The gap narrows because the later years favor the facility.
This is why life expectancy is not a morbid input. It is a cost input. If the person in your situation has a health profile pointing toward a shorter horizon, the front-loaded savings of aging in place dominate. If they are likely to live 12-15 more years, the expensive late-stage home-care years get more weight. The 10-year comparison across all four care settings shows how wide the range gets when the ADL decline rate changes.
The Break-Even: How Many Care Hours a Week Flips It
I solved for the years 5-10 care hours at which the two paths cost the same:
| Equity opportunity cost counted? | Break-even care hours per week (yrs 5-10) |
|---|---|
| No | About 72 hours |
| Yes (4% real on $376,000) | About 57 hours |
Our example assumes 56 hours. So it sits right on the line once equity is counted. If her needs are closer to 40 hours a week, staying home wins by a lot. If she needs overnight supervision that pushes her to 70+ hours, assisted living wins. The nearby care-hours crossover at 25, 40, and 60 hours walks through the same threshold with different assumptions.
A caution about that 57: care hours are not a dial you set. They are an escalation curve. Someone with early cognitive decline may jump from 35 to 70 hours within months, and at that point the comparison is no longer assisted living versus home. It is memory care versus home, and memory care fees are higher than the assisted living fees I used above.
Where the News Feeds Into the Math
Most of the articles in this week's reading are not about elder care. But several of them touch inputs in the model.
Mortgage rates above 7%. NerdWallet's Mortgage Rates Today, Wednesday, September 23 reports rates easing on a glimmer of economic optimism from Iran but still above 7%. This cuts two ways for our example:
- Against selling: the lock-in effect is real if the family planned to buy a smaller place for the parent, or if an adult child wants to buy the parent's house. Higher rates depress both.
- Against borrowing to stay: if the $18,000 in modifications were financed at, say, 7.5% over ten years, the payments come to about $25,600 in total, roughly $7,600 more than the sticker price. That is a small number here but a large one if the modifications cost $60,000 (a lift, a bathroom addition).
Utilities and data centers. NerdWallet's Data Centers Are a Potent, Bipartisan Battleground in the Midterms describes voter backlash over the anticipated costs of data centers to local communities. I can't tell you from that article what will happen to your local utility rates. But a home's carrying cost is not fixed. I used $14,150 a year, and if utilities or property taxes rise faster than the 2% real rate I assumed, the stay-home path gets more expensive relative to a facility whose fees are bundled. Test your own local trend.
Small leaks in a care budget. NerdWallet's I Can't Stop Buying Surprise Bags is about impulse purchases where you don't know what's inside until you open it. That is a decent description of a home-care budget. The line items you plan for (aide hours, modifications) are visible. The ones that pile up (respite coverage when the aide calls out, incontinence supplies, medical transport, replacement equipment) show up unlabeled. In the hidden cost gap analysis, those extras are what quietly close the distance between the two paths. My example has none of them, which flatters the stay-home column.
Card benefits that change. NerdWallet's Chase Freedom Flex Ditches Foreign Transaction Fee, Cell Phone Insurance is a reminder that perks you count on can disappear. If a family relied on a card's cell phone protection for the parent's phone or medical alert setup, check what your coverage actually says now. It is a small item, but the point generalizes: model the benefits you actually have today, not the ones you assumed.
Layering VA Aid & Attendance and Medicaid
Two funding sources change who pays, and one of them can change which option is even available.
VA Aid & Attendance. If the person is a wartime veteran or surviving spouse who qualifies, the benefit can be tens of thousands a year. For illustration, say it pays $24,000/year. That reduces out-of-pocket spending on either path. In an NPV comparison, it does not by itself change the crossover, because it applies to both. What it changes is how long the assets last, and that changes whether you reach the Medicaid question at all. The math on what the benefit can and can't close shows this in detail. Eligibility rules on income, net worth, and look-back periods are specific, so confirm with an accredited VA claims agent before assuming anything.
Medicaid spend-down. In our example the total 10-year spend is $821,104 to $962,171 in present value. That is more than a $400,000 house plus typical savings can absorb. So a realistic model has a second phase: private pay first, then a spend-down toward Medicaid eligibility, with the coverage of home care versus facility care differing by state. I can't give you your state's rules here. What I can say is that in a model where assets run out in year 6 or 7, the years 7-10 are not priced at $108,000 or $110,246 at all. They are priced at whatever your state's program covers. That can flip the ranking, so treat it as a separate branch of the model rather than an afterthought. The aging in place vs nursing home crossover at three ADL levels covers the later-stage branch.
What Rules of Thumb Get Wrong Here
Three common shortcuts each fail on this example:
- "Staying home is always cheaper." True for the first five years in our case, and roughly a tie by year ten once equity is counted. A model that leaves out equity would say staying home wins by $141,067 and be off by about the whole gap.
- "Assisted living costs $X a month." In our example it moves from $7,500 to $9,000 as ADL losses accumulate. A flat monthly figure misses the add-on tiers.
- "Just compare today's monthly bills." In year 1, staying home costs $48,470 against $90,000, which makes assisted living look like a $41,530 mistake. By year 5 the annual comparison has reversed. Only a multi-year present-value comparison catches the reversal.
What This Example Deliberately Leaves Out
Being honest about limits is part of the math:
- Caregiver quality and availability. A $33 rate assumes you can find and keep aides. Losing one in a tight labor market has costs the model doesn't show.
- Non-financial value. Staying in a home of forty years, near neighbors and a familiar routine, has value that isn't in any table. So does the safety and social life of a good facility. Some families pay more to get one of these, and that is a legitimate choice.
- Home appreciation. I assumed 0% real. If the house rises in value, staying gets cheaper. If it needs a $30,000 roof, it gets costlier.
- Facility fee increases. Facilities raise rates annually, often faster than general inflation. I held fees flat in real terms.
- Tax effects. Medical expense deductions and capital gains on the home sale can be significant. Talk to a tax professional.
Your Turn: The Five Inputs That Decide It
If you want to run this for your own family, these are the inputs that moved the answer above:
- Current and projected care hours per week, by year, based on realistic ADL decline (not today's need held flat)
- The aide rate you can actually get locally, plus the hidden extras
- Home equity and the return you assume on it, the input from the editor's rent-versus-buy logic
- Life expectancy for this specific person, since the 5-year and 10-year answers differ by $135,000 on equity-adjusted terms in our example
- Benefits available (VA Aid & Attendance, long-term care insurance) and the point where Medicaid spend-down begins
Change any one of them and the result changes. Changing two or three together, which is what actually happens in real families, can flip it entirely. For the step-by-step formula behind all of this, see the 5-step NPV formula walkthrough.
Run the Numbers for Your Own Situation
An example with a $400,000 house and a 78-year-old woman is not your family. Yours may have a mortgage, a veteran spouse, a faster or slower decline, or a memory care diagnosis that removes assisted living from the list. You can model your own version, with your own ADL trajectory, home equity, benefits, and time horizon, at Dorevanti. Nobody has to pick a side before seeing what the math says for their case.
Sources
- I Edit Mortgage Advice for a Living — and Still Rent — NerdWallet
- Data Centers Are a Potent, Bipartisan Battleground in the Midterms — NerdWallet
- Mortgage Rates Today, Wednesday, September 23: Easing, But Still Above 7% — NerdWallet
- I Can’t Stop Buying Surprise Bags — NerdWallet
- Chase Freedom Flex Ditches Foreign Transaction Fee, Cell Phone Insurance — NerdWallet