The $16,953 NPV Gap: How September 2026's Sub-7% Mortgage Rates and $0.10 Wage Growth Flip the Aging-in-Place vs Facility Care Math
The scenario: your mother, one ADL loss, and a $28,500 decision
Here's the situation a lot of families are sitting in right now, in September 2026: Mom is 78, lives alone, and has just lost her first ADL (activities of daily living) — she needs help bathing safely. Everyone agrees she's not ready for assisted living. But everyone also knows this is the first domino, not the last.
The two paths in front of you:
- Modify the house ($28,500 for a walk-in shower, stairlift, ramp, and grab bars) and bring in home health aides, starting at 20 hours a week.
- Move to assisted living now, before the next ADL loss makes the transition harder, at a starting cost of roughly $70,800/year.
Both feel defensible. Neither is obviously right. The only way to actually answer it is to run the net present value (NPV) of each path over your realistic time horizon — and September 2026's economic data changes that math more than most people realize.
The inputs that just moved
Three numbers from this month's data directly feed this calculation:
- CPI rose 0.4% in August 2026 (BLS), which annualizes to roughly 4.8% — this is your baseline for facility and home-cost inflation.
- Average hourly earnings rose $0.10 in August (BLS), against a still-tight labor market at 4.1% unemployment. That wage pressure flows straight into home health aide rates, which move independently of general inflation.
- Mortgage rates sat just below 7% as of September 11 (NerdWallet), and the Fed is expected to raise rates further this month on persistent inflation. That matters directly if you're financing home modifications through a HELOC — and it raises the discount rate you should be using to compare cash flows across years.
None of these numbers tell you what to do. They tell you what to plug in. This is the exact kind of month-to-month data drift that Dorevanti is built to absorb automatically, so you're not manually re-running a spreadsheet every time the Fed meets.
Building the 5-year comparison
Aging-in-place, year by year — starting at 20 care hours/week at $33/hour, with hours escalating as ADL losses accumulate (a second ADL loss mid-Year 2, a third by Year 4), wages growing at roughly 3.9%/year based on the current earnings trend, and home carrying costs (insurance, taxes, upkeep) starting at $8,000/year and rising with CPI:
| Year | Care hours/week | Aide wage | Annual care cost | Home carrying costs | Total |
|---|---|---|---|---|---|
| 0 | — | — | — | $28,500 (modification) | $28,500 |
| 1 | 20 | $33.00 | $34,320 | $8,000 | $42,320 |
| 2 | 28 | $34.29 | $49,918 | $8,384 | $58,302 |
| 3 | 35 | $35.63 | $64,857 | $8,786 | $73,643 |
| 4 | 45 | $37.02 | $86,617 | $9,208 | $95,825 |
| 5 | 55 | $38.46 | $109,955 | $9,650 | $119,605 |
Facility care, year by year — assisted living for the first three years, transitioning to memory care in Year 4 as ADL losses accumulate past what assisted living typically handles, with facility costs rising roughly 5%/year (facility inflation historically outpaces CPI):
| Year | Setting | Annual cost |
|---|---|---|
| 1 | Assisted living | $70,800 |
| 2 | Assisted living | $74,340 |
| 3 | Assisted living | $78,057 |
| 4 | Memory care | $83,220 |
| 5 | Memory care | $87,381 |
Discounting both streams at 6.9% (a rate that tracks the current sub-7% mortgage/HELOC environment) gives you the NPV:
- Aging-in-place NPV (5 years): $338,506
- Facility care NPV (5 years): $321,553
- Gap: facility care is $16,953 cheaper over this horizon, in this scenario.
This is the kind of analysis Dorevanti runs for you — so you don't have to build the spreadsheet yourself, re-derive discount factors, or track down current wage and rate data every time you want to check your numbers.
Why the gap is smaller than you'd expect — and how it flips
$16,953 over five years is not a landslide. It's close enough that a single input — your actual life expectancy — can flip the winner entirely.
Run the same two cash-flow streams over a 3-year horizon instead of 5 (say, because a health condition suggests a shorter runway):
- Aging-in-place NPV (3 years): $179,404
- Facility care NPV (3 years): $195,210
- Aging-in-place is now $15,806 cheaper.
That's the crossover in action. The same household, same ADL trajectory, same wage and rate environment — but a shorter time horizon completely reverses which option costs less. This lines up with what we found in the $38,600 vs $91,600 NPV gap analysis: the speed of ADL decline and the length of the horizon are doing more work than either option's "sticker price."
The mechanism is straightforward: the $28,500 modification cost is a sunk, front-loaded expense. Over a long horizon, it gets diluted across many years of comparatively cheaper early-stage home care. Over a short horizon, it never gets the chance to pay for itself before facility care's lower Year-1 marginal cost (no big upfront outlay) wins.
If you want to see this build out step by step with your own numbers, the 5-step NPV formula walkthrough shows the exact mechanics — and it's worth running twice: once at your best-guess life expectancy, once at a conservative one.
Where VA Aid & Attendance and Medicaid spend-down change the picture
Two variables sit on top of this base math and can matter more than the base math itself:
VA Aid & Attendance. If your parent is a wartime veteran (or surviving spouse), the 2026 Aid & Attendance benefit is roughly $29,184/year for a single veteran. Discounted over 5 years at 6.9%, that's a present value of about $120,000 — applicable to either path, since A&A can pay for in-home aides or facility care. It doesn't change which option wins in our scenario above (it reduces both NPVs by roughly the same amount), but it substantially changes whether the family can afford the winning option without touching savings. Benefit stacking matters for cash-flow feasibility even when it doesn't move the comparison itself.
Medicaid spend-down. This is the hidden long-tail risk in the aging-in-place NPV. If the family's investable assets are, say, $250,000, the $338,506 five-year NPV of aging-in-place will exhaust those assets before Year 5 — likely forcing a mid-trajectory transition to a Medicaid-certified nursing home anyway, on worse terms and at a moment of crisis rather than by plan. Facility care, particularly nursing homes, has far more established Medicaid pathways than in-home care does in most states. An aging-in-place plan that looks cheaper on paper but runs out of private funds in Year 4 isn't actually the cheaper plan — it's a plan that defers a harder decision. This is exactly the failure mode covered in the decision framework using ADL decline rate and life expectancy.
The financing detail nobody mentions
If you're funding that $28,500 modification through a HELOC rather than cash, September's rate environment matters directly. With mortgage rates sitting just below 7% and the Fed expected to hike further this month, HELOC rates — typically prime plus a margin — are likely to be at or above that 7% mortgage benchmark, not below it. That pushes your effective discount rate up, which (perhaps counterintuitively) helps the aging-in-place case in later years, because it discounts those escalating future care costs more heavily. It's a small effect next to the ADL escalation curve, but it's real, and it's the kind of variable a static calculator built last year won't have updated.
Separately — and this is a minor point, but families going through this often ask about it — if you need to float the $28,500 modification cost for a few weeks before a HELOC draw clears, a 0% intro APR or points-earning card (NerdWallet's coverage of cards like the Chase Sapphire lineup or the newly launching PenFed Defender card) can bridge that gap without touching savings. It's not a strategy, just a logistics detail worth knowing.
Your numbers will differ
Every input in this post is a labeled example: the $33/hour aide rate, the 20-hour starting point, the ADL escalation timing, the 6.9% discount rate. Change your parent's actual ADL trajectory, your region's aide wages, your family's veteran status, or your realistic life expectancy window, and the $16,953 gap can become a $60,000 gap in either direction — or flip sign entirely, the way it did when we shortened the horizon to 3 years.
That's the whole point of doing this as NPV math instead of a rule of thumb. "Aging in place is always cheaper" and "assisted living is always cheaper" are both wrong for a large share of families — the real answer depends on ADL decline speed, life expectancy, financing rates, and benefit stacking specific to your situation. You can model this for your specific situation at Dorevanti, using this month's actual wage, CPI, and rate data instead of last year's assumptions.
Sources
- Major Economic Indicators Latest Numbers — Bureau of Labor Statistics
- 7 Reasons NerdWallet Calls Chase Sapphire a “Must-Have for Travelers” — NerdWallet
- Mortgage Rates Today, Friday, September 11: Just Below 7% — NerdWallet
- What a Fed Rate Hike Would Mean for Investors and Savers — NerdWallet
- PenFed Launching Defender Card With Bonus Rewards on Gas, Groceries and More — NerdWallet