With $100,000 to place in 2026, the index fund is the better default and the rental is the special case. At a 6.49 percent mortgage, most properties yield less than the loan costs, so leverage subtracts instead of adds. The rental wins only where the deal’s cap rate clears the mortgage rate, and that is now rare.
Here is the number pair that frames everything. As of the week of July 9, 2026, Freddie Mac’s average 30-year fixed rate is 6.49 percent, and the S&P 500’s Shiller CAPE sits near 41 (July 2026), a valuation seen only around the 1999 dot-com peak in 155 years of data. Both doors are expensive at the same time, which is genuinely unusual.
That makes this a harder and more interesting question than the usual stocks-versus-property fight. Let us run the actual math, with every headline figure computed by the same engine that powers our rental property ROI calculator.
Where do stocks and housing stand in mid-2026?
Stocks are at record highs and priced for near-perfection. Housing has stalled: the S&P Cotality Case-Shiller national index rose just 0.8 percent year over year in April 2026, the slowest pace since 2023, and with inflation near 3.8 percent that is a real-terms decline. The index lags about two months, so April is the freshest national reading as of this writing.
The market is sharply regional. Chicago led at 6.5 percent year over year while Seattle fell 2.3 percent, and Sun Belt metros such as Tampa, Dallas, and Phoenix posted nominal declines. Rents have cooled too: Zillow’s observed rent index was up about 2 percent early in 2026, and its forecast calls for single-family rents up 1 to 2 percent with apartment rents roughly flat as new supply hands renters bargaining power.
One number cuts the other way. Arbor’s data put national single-family rental cap rates near 7.3 percent in late 2025, up almost two points since 2021. Hold that thought, because the gap between that broad average and what you can actually buy in a specific metro is where most rental plans quietly fail.
Why does the last decade’s comparison chart mislead you?
You have seen the chart: the S&P 500 up more than 200 percent from 2015 to 2024 against roughly 90 percent for home prices. True, and beside the point. It compares an unlevered index against an unlevered price series, ignoring the two forces that drive real rental returns: borrowed money and rent.
A buyer who put 25 percent down controlled four times their cash. When prices rose 5 percent, their equity grew closer to 20 percent before costs, while a tenant retired the debt. That is the entire real estate pitch in one sentence, and from 2015 through 2021, with mortgages near 3 percent, it worked beautifully.
The catch is that the machine runs in reverse when the borrowing costs more than the property yields. So the question is not which asset won the last decade. It is whether leverage helps or hurts at 6.49 percent, and that turns on a single comparison you can do in one minute.
What does the leverage math look like at 6.49 percent?
Mostly negative. Price a realistic deal: a $400,000 single-family rental, 25 percent down ($100,000), a $300,000 mortgage at 6.49 percent for 30 years, renting at $2,000 a month, a 6 percent gross yield that matches coastal-adjacent metros. Our engine computes the payment at $1,894.23 a month, or $22,730.76 a year.
Now the operating stack, before the mortgage sees a dollar:
- Vacancy at 6 percent leaves $22,560 of the $24,000 gross rent actually collected
- Property taxes at 1.1 percent of value: $4,400
- Insurance: $2,000 (the national ballpark; far higher in Florida or wildfire country)
- Maintenance plus a capital-expense reserve at 1.5 percent of value: $6,000
- Property management at 9 percent of collected rent: $2,030.40
That leaves a net operating income of $8,129.60, which is a 2.03 percent cap rate on the $400,000 price. Subtract the $22,730.76 of debt service and the deal loses $14,601.16 a year, or $1,216.76 a month, a cash-on-cash return of minus 14.6 percent. Every figure above comes straight from the rental ROI calculator at these inputs, so you can rerun it with your own numbers in two minutes.
The one-minute screen is the cap rate against the mortgage rate. Yield above the loan rate, and each borrowed dollar adds return; below it, each borrowed dollar drains it. This deal borrows at 6.49 percent to hold a 2.03 percent yield, which is why it bleeds. Cheaper metros narrow the gap but, on 2026 vendor estimates, none of the majors close it.
Which metros still come close in 2026?
The cheaper the metro relative to its rents, the closer a rental gets to carrying itself. Below about 15 times annual rent, cash flow is within reach with a larger down payment or an off-market price. Above 20, a rental at 6.49 percent is a pure appreciation bet. The old 1 percent rule, monthly rent at 1 percent of price, is nearly extinct in 2026.
| Metro | Median price | Gross yield | Est. cap rate | Price-to-rent | Read |
|---|---|---|---|---|---|
| Cleveland, OH | ~$215,000 | ~7.8% | ~5.0% | ~12.8 | Best cash-flow odds |
| Memphis, TN | ~$198,000 | ~8.2% | ~5.3% | ~12.2 | Best cash-flow odds |
| Detroit, MI | ~$180,000 | ~8% | ~5.0% | <13 | Cash-flow odds, higher risk |
| Birmingham, AL | ~$225,000 | ~7.4% | ~4.8% | ~13.6 | Solid |
| Indianapolis, IN | ~$245,000 | ~7.1% | ~4.6% | ~14.1 | Solid |
| Kansas City, MO | ~$265,000 | ~6.8% | ~4.4% | ~14.7 | Balanced |
| Houston, TX | ~$340,000 | ~6% | ~4.0% | ~16.5 | Balanced |
| Phoenix, AZ | ~$450,000 | ~5% | ~3.5% | ~20 | Appreciation play |
| Seattle, WA | ~$772,600 | ~3% | ~4.0% | ~32.6 | Appreciation only |
| San Diego, CA | ~$1,050,000 | ~3.2% | ~3.0% | ~31.1 | Negative leverage |
| San Francisco, CA | ~$1,687,500 | ~2.8% | ~2.5% | ~36 | Appreciation bet only |
| San Jose, CA | ~$1,488,000 | ~2.5% | ~2.5% | ~40.5 | Appreciation bet only |
Notice that even Memphis at 5.3 percent sits under the 6.49 percent line. The honest 2026 reading is not “buy in the Midwest and cash flow”; it is that the Midwest loses slowly while the coasts lose fast. A deal only flips positive with a bigger down payment, a genuinely below-market purchase, or rates falling later. If you are weighing a home for yourself rather than a tenant, the same forces drive our rent vs buy calculator, and the priciest metros in this table are the ones where renting your own home tends to win too. Cost of living shapes the other side of the ledger as well; our FIRE number by metro study maps that across 75 metros.
Do short-term rentals change the math?
Sometimes, in the right leisure market, at the cost of running a hospitality business. AirDNA forecasts 57.4 percent national occupancy for 2026, slightly above pre-pandemic, with revenue per available rental up about 2.9 percent, almost all from higher nightly rates. Supply growth has slowed with mortgage rates back above 6 percent.
| Market | Type | Avg revenue per listing | ADR | Occupancy |
|---|---|---|---|---|
| Gatlinburg, TN | Mountain leisure | ~$47,900 | ~$347 | ~53% |
| Destin, FL | Coastal leisure | ~$58,800 | ~$462 | ~59% |
| Panama City Beach, FL | Coastal leisure | ~$36,400 | ~$341 | ~57% |
| Scottsdale, AZ | Desert resort | ~$39,900 | ~$397 | ~59% |
| Nashville, TN | Urban | ~$43,100 | ~$346 | ~43% |
| Seattle, WA | Urban | ~$24,400 | ~$211 | ~64% |
| Charlotte, NC | Urban | ~$19,400 | ~$184 | ~55% |
A leisure property grossing $48,000 that would rent long-term for $24,000 sounds like double the return. Cleaning, 20 to 30 percent management, furnishing, higher utilities, and lodging taxes roughly double the expense load too, and city rules can change under you. The 2026 World Cup is a one-time tailwind in host metros, not a trend. Underwrite it honestly in the Airbnb ROI calculator, and read our Airbnb saturation guide before assuming 2021 occupancy.
How do taxes compare after the OBBBA?
Real estate wins on tax optionality; index funds win on tax simplicity. The One Big Beautiful Bill Act, signed July 4, 2025, upgraded the landlord toolkit in two durable ways: 100 percent bonus depreciation is permanent for qualifying property acquired and placed in service after January 19, 2025, and the 20 percent Qualified Business Income deduction is permanent for rentals that qualify as a trade or business (the IRS safe harbor wants about 250 documented hours of rental services a year).
Stack those with a cost-segregation study and 1031 exchanges and a high-bracket, hands-on landlord can pull years of depreciation into year one and defer gains for decades. The fine print matters: building depreciation is recaptured at up to 25 percent when you sell, and the paperwork is a Schedule E life.
The index fund’s tax story fits in one sentence: long-term gains and qualified dividends at 0, 15, or 20 percent, deferral until you choose to sell, loss harvesting when markets drop, and nothing to track. And if the choice is between a taxable rental down payment and unfilled tax-advantaged space, filling the 401(k) and IRA first is the higher-probability move; our FIRE calculator shows what those contributions become.
What happens to $100,000 over 30 years?
We modeled the same $100,000 both ways with the FinExplained engine: buy the index fund, or put 25 percent down on the $400,000 rental above. Rent, expenses, and the property value all grow at the scenario’s appreciation rate; the mortgage amortizes on schedule; the rental’s net position is property value minus loan balance plus every dollar of cash flow, negative years included. One deliberate simplification: rental cash flows sit uninvested, and we price that honestly below.
| Scenario | Stock / property growth | Index fund ends at | Rental ends at | Cash the owner added along the way |
|---|---|---|---|---|
| Base | 7% / 3% | $761,226 | $675,751 | $295,154 |
| Bull | 10% / 5% | $1,744,940 | $1,586,975 | $141,802 |
| Bear | 4% / 1% | $324,340 | $140,004 | $399,136 |
The index fund finishes ahead in all three scenarios, and the table still flatters the rental. Those “cash added” dollars left the owner’s pocket in monthly $1,200 pieces. An index investor with the same income could have invested each one. At 7 percent, the base case’s top-ups compound to about $1,093,368 by year 30, so the honest all-in comparison is roughly $1.85 million for the index path against a $970,905 paid-off house. Add 60 to 180 hours a year of landlording, about $180,000 of unpaid labor at $40 an hour over 30 years, and the verdict stops being close.
What this model assumes
Purchase $400,000 with 25 percent down at 6.49 percent for 30 years. Gross rent $24,000 with 6 percent vacancy; property tax 1.1 percent of value, insurance $2,000, maintenance and capex reserve 1.5 percent of value, management 9 percent of collected rent. Rent, expenses, and value grow at the scenario rate; no sale costs, no tax effects on either side, cash flows uninvested. Change the inputs in the rental ROI calculator and the story changes with them. Educational estimates, not advice.
Flip the deal to a true 7 percent cap rate at the same mortgage and the machine runs forward again: positive carry from year one, plus paydown, plus appreciation, and the rental beats the index handily. That deal exists in 2026 mostly off-market, at small-town prices, or after a rate drop. The point is not that rentals lose; it is that this decade’s default deal loses, and the burden of proof moved to the property. A locked payment does have one quiet edge: it is a form of forced saving, and prepaying it is a guaranteed 6.49 percent return, which our extra payments calculator prices.
What do the forecasters expect for the next decade?
Little from stocks, less from housing, and more from bonds than the 2010s trained anyone to expect. Goldman Sachs models about 3 percent annualized for the S&P 500 over ten years (a 7th percentile decade since 1930); Vanguard’s December 2025 outlook puts U.S. equities at 3.5 to 5.5 percent, with high-quality bonds near 4 percent and competitive; JPMorgan is the optimist near 6 percent. Housing forecasts for 2026 cluster around 2 percent: Zillow near 1.2, Morgan Stanley near 2, J.P. Morgan near flat, NAR near 4.
If both assets deliver low single digits, the rental’s remaining edges are leverage and tax shelter, and leverage only helps where yield beats the borrowing cost. Treat every bar on that chart as a dated forecast, not a promise; several 2026 outlooks were revised mid-year after rates moved.
Which one fits you?
Choose the index fund if you value liquidity (funds settle in a day or two; houses take months and 5 to 6 percent in selling costs), you do not want a second job, or your metro sits in the bottom half of the cap-rate chart. This is the right default for most people most of the time.
Real estate earns its place when the specific deal, not the asset class, passes the screen. You are ready to run serious numbers when all four hold:
- The cap rate on real expenses beats your mortgage rate, or a larger down payment gets it there
- The price-to-rent ratio is under about 15
- You can hold ten years and cover a bad tenant year without selling anything
- You are in a high bracket and will actually use depreciation, the QBI deduction, and 1031s
Insurance deserves its own line in your underwriting: Insurify projects the national average premium near $3,057 for 2026, with California up about 16 percent after the 2025 wildfires and Florida near $8,300. A quote, not an average, belongs in the model. For the deeper mechanics of cash flow, cap rate, and cash-on-cash, our rental property ROI playbook walks the full underwrite.
Run your own deal through the rental ROI calculator before any of this becomes a plan. And once the portfolio exists, the question inverts from building wealth to spending it safely; that math lives in our companion piece on the 4 percent rule in 2026.
The single most useful next step: compute the cap rate on a property you can actually buy, with the full expense stack, and set it beside 6.49 percent. That one comparison answers the 2026 version of this question in about five minutes.