REITs Explained: Real Estate Investing Through the Stock Market

Executive Summary

A REIT — a real estate investment trust — is a company that owns, operates, or finances income-producing real estate and trades on a stock exchange like any other share. Buying one share of a REIT gives you a fractional stake in a professionally managed portfolio of apartment buildings, warehouses, data centers, shopping centers, cell towers, or mortgages. You get real estate exposure without a down payment, a mortgage, a tenant's 2 a.m. phone call, or the illiquidity of selling a building. That is the entire appeal, and it is why Congress created the structure in 1960: to let ordinary investors access institutional-scale real estate.

This guide covers the mechanics that make REITs different from ordinary stocks: the legal requirement to distribute at least 90% of taxable income as dividends, the split between equity REITs (which own property) and mortgage REITs (which lend against it), the major property sectors and their very different outlooks, why funds from operations (FFO) is the correct earnings metric instead of EPS, how REIT dividends are taxed, why REITs are sensitive to interest rates, how their long-run returns compare with the broader stock market, and a practical checklist for evaluating any individual trust. The angle throughout is honest: REITs are a genuinely useful tool for income and diversification, but they are not a magic yield machine, and the label "REIT" hides enormous variation in quality and risk.

What Is a REIT, and What Is the 90% Payout Rule?

REITs were created by U.S. Congress in 1960 through legislation signed by President Eisenhower, with an explicit goal: give small investors the same access to large-scale, income-producing real estate that previously belonged mostly to wealthy individuals and institutions. Before REITs, owning a stake in a portfolio of office towers or apartment complexes was effectively out of reach for an ordinary household. Afterward, it cost the price of one share.

The legal requirements

To qualify as a REIT under the U.S. tax code, a company must meet a set of ongoing tests. The most important ones:

• Asset test: At least 75% of total assets must be invested in real estate, cash, or government securities.
• Income test: At least 75% of gross income must come from real-estate sources — rents, mortgage interest, or property sales — with a further 95% test covering related passive income.
• Distribution test: The company must distribute at least 90% of its taxable income to shareholders each year as dividends.
• Ownership tests: At least 100 shareholders, and no more than 50% of shares held by five or fewer individuals (the "5/50 rule").

The 90% payout rule is the defining feature, so it deserves a moment. In exchange for paying out nearly all of its income, a REIT is allowed to deduct those dividends from its corporate taxable income — which means a compliant REIT generally pays little or no federal corporate income tax itself. The tax burden passes through to shareholders, who pay tax on the dividends they receive. REITs are therefore best understood as conduits: they collect rent or interest, take out operating costs and interest expense, and pipe the rest to investors.

This structure has two practical consequences. First, REIT dividend yields are structurally higher than those of ordinary companies, because the payout is mandatory rather than discretionary. Broad REIT index yields have historically run around 3% to 5%, versus roughly 1.5% to 2% for the S&P 500 in recent years. Second, because they retain so little cash, REITs fund growth externally — by issuing new shares, taking on debt, or selling properties. That dependence on capital markets is a source of both discipline and fragility, and it explains much of their interest-rate sensitivity, covered below.

Equity REITs vs Mortgage REITs: Two Very Different Animals

The single most important distinction in the REIT universe is what the trust actually holds. The two categories share a name and a tax structure but almost nothing else about their economics.

Equity REITs are property companies. Their value is tied to the buildings they own: occupancy, rents, and what a buyer would pay for the portfolio. Over long periods, their returns come from a combination of dividends, rent growth, and property appreciation — a hybrid of bond-like income and equity-like growth.

Mortgage REITs are levered lenders. They borrow short-term money, buy longer-term mortgage assets, and live off the difference. That spread can be lucrative, but it compresses or inverts when the yield curve flattens, and the heavy leverage amplifies every mistake. Mortgage REITs have a long history of eye-catching double-digit yields followed by dividend cuts and book-value erosion. When you see a REIT yielding 12%, you are almost always looking at an mREIT, and the market is pricing in meaningful risk that the payout shrinks. There is also a third, smaller category — hybrid REITs that do both — but they are rare today.

For most investors seeking "real estate exposure without the mortgage," equity REITs are the intended instrument. Mortgage REITs are closer to a specialized fixed-income strategy wearing an equity wrapper.

The Major REIT Sectors — and Why the Label Matters

"Real estate" sounds like one asset class, but a warehouse leased to an e-commerce distributor and a half-empty suburban office tower have almost nothing in common economically. Modern REIT indices break the universe into sectors, and the differences between them routinely swamp the difference between individual companies within them.

Lease structure differs by sector and shapes risk. Apartment leases reset roughly every year, so residential REITs adjust quickly to inflation but also to downturns. Net-lease retail and industrial tenants often sign 10- to 20-year contracts and pay the taxes, insurance, and maintenance themselves ("triple-net"), which produces bond-like income but slow growth. Data-center and tower contracts run long with escalators. Office leases are long too — which is precisely the problem when space is over-supplied, because the pain arrives slowly but lasts for years.

If you want to see how individual names within these sectors are currently scored, 360head Stockiq's stock research tools and the public track record show the methodology applied to real companies.

Why FFO, Not EPS, Is the Right Metric

If you screen REITs by price-to-earnings ratio the way you might screen ordinary stocks, you will systematically misjudge them. The reason is depreciation.

Under GAAP accounting, a building is depreciated over a set schedule — commonly decades — as if it steadily loses value every year. But well-located, well-maintained real estate often holds its value or appreciates, even as the accounting insists it is wasting away. The result: a healthy, cash-generating REIT can report depressed or even negative earnings per share purely because of a large, non-cash depreciation charge. Comparing P/E ratios across REITs, or between a REIT and a software company, is close to meaningless.

The industry's answer is funds from operations (FFO), a metric standardized by Nareit in 1991:

FFO = Net income + depreciation and amortization of real estate − gains (or + losses) on property sales

Depreciation is added back because it is non-cash and economically misleading for property; gains from selling buildings are removed because they are one-off events, not recurring operating performance. Analysts then go one step further to adjusted funds from operations (AFFO), which deducts recurring capital expenditures, leasing costs, and non-cash rent adjustments. AFFO is the closest thing a REIT has to "free cash flow available to pay the dividend," and the AFFO payout ratio — dividends divided by AFFO — is the single best quick test of dividend sustainability. A ratio comfortably below 100% suggests room to maintain or grow the payout; one persistently above 100% is a red flag.

One honest caveat: FFO is a non-GAAP measure, and companies calculate and present it with some latitude. Always reconcile the figure against the REIT's own supplemental disclosures on SEC EDGAR rather than trusting a data aggregator's summary.

How REIT Dividends Are Taxed

This is the part of REIT investing that surprises people most, and it has real money consequences.

Most dividends from ordinary U.S. companies are "qualified" and taxed at the preferential long-term capital-gains rates (0%, 15%, or 20% federally, depending on income). Most REIT dividends are not qualified. Because the REIT itself generally pays no corporate tax, the IRS treats its distributions mostly as ordinary income, taxed at your full marginal rate — up to 37% federally at the top bracket.

There are three partial offsets worth knowing:

• The 20% pass-through deduction. Since the 2017 tax law, REIT dividends generally qualify for the Section 199A deduction, letting most non-corporate investors deduct 20% of REIT dividend income before tax. That trims the effective top federal rate on REIT dividends from 37% to roughly 29.6%. The deduction, originally set to expire, was made permanent by legislation in 2025, though tax law can always change again.
• Return of capital. Part of a REIT's distribution — sometimes a substantial part, because depreciation shields income — may be classified as return of capital, which is not taxed when received. Instead it reduces your cost basis, deferring the tax until you sell. Each year the REIT reports the breakdown (ordinary, capital gain, return of capital) on Form 1099-DIV.
• Account placement. Because the income is taxed heavily, many investors hold REITs inside tax-advantaged accounts (IRAs, 401(k)s), where the ordinary-income treatment is sheltered. Whether that trade-off makes sense for you depends on your full tax picture — a question for a tax professional, not an article.

The practical takeaway: compare REIT yields to other income investments on an after-tax basis, in the account type where you would actually hold them. A 4% qualified dividend and a 4% REIT dividend are not the same 4% in a taxable account. For official rules, the IRS's own publications — Publication 550 on investment income — are the authoritative source.

Interest-Rate Sensitivity: The Two Channels

REITs have a well-earned reputation for falling when interest rates rise. The mechanism runs through two channels, and understanding both keeps you from over- or under-reacting.

Channel one: valuation. REITs compete for investor money with bonds. When Treasury yields climb, a 4% REIT yield looks less compelling next to a 4.5% government bond, so REIT prices tend to adjust downward until the yield spread widens again. At the property level, higher rates push up "cap rates" — the yield buyers demand on buildings — which lowers what the portfolio is worth. Because REITs carry meaningful debt, higher rates also raise interest costs as loans roll over.

Channel two: the economy. Rates usually rise because growth and inflation are strong, and strong growth is good for landlords — occupancy improves, and rents (especially short leases like apartments and hotels) reset higher. Historically, REITs have sometimes performed respectably during rising-rate periods when the increases reflected a healthy economy, and poorly when rates rose while growth faltered. The 2022 episode illustrates the valuation channel dominating: as the Federal Reserve hiked at its fastest pace in decades, the FTSE Nareit All Equity REITs index fell roughly 25% for the year, worse than the S&P 500's decline of about 18%. By contrast, in several earlier hiking cycles, REITs posted positive total returns alongside rising rates.

The honest summary: rate sensitivity is real, but it is not a mechanical law, and it fades as a driver over longer holding periods, where rent growth and property fundamentals take over. For how rates and inflation ripple through asset classes more broadly, see our companion guide on inflation, interest rates, and recession.

Historical Returns vs Stocks

So has the structure actually delivered? Over long windows, reasonably well — with important qualifications.

• Multi-decade record. From the early 1970s, when the modern REIT index begins, through the mid-2020s, U.S. equity REITs (as measured by the FTSE Nareit All Equity REITs index) produced annualized total returns in the low double digits — broadly comparable to, and in some long windows slightly ahead of, the S&P 500. Nareit publishes this series and updates it regularly.
• Decade-level divergence. The averages hide long stretches of under- and out-performance. REITs trounced the S&P 500 in the 2000s (roughly 2000–2010), then lagged badly through much of the 2010s as mega-cap technology drove the index, and lagged again in the 2022 rate shock. Anyone buying REITs for steady outperformance is buying something that does not exist.
• Income is the engine. Unlike growth stocks, a large share of the REIT total return historically comes from dividends. That makes REIT returns somewhat more stable in composition, though not necessarily in price: listed REITs are stocks, and in sharp market sell-offs they tend to fall with equities, sometimes harder. In 2020's pandemic crash and 2022's rate shock, listed REIT drawdowns were comparable to or deeper than the broad market's.
• Diversification value. Historically, REIT correlation with the broad stock market has been moderate — enough to offer some diversification benefit in normal times, less in a crisis, when correlations converge. A small REIT allocation has tended to modestly smooth a stock-and-bond portfolio's ride rather than transform it.

Past performance, here as everywhere, does not determine future results. The structural takeaway is that REITs have earned their place as a legitimate, income-heavy asset class — not as a superior one. For a look at how dividend-focused investing fits together more generally, see our guides to dividend stocks and ETFs, the latter being the simplest way most investors own a diversified REIT basket.

How to Evaluate a REIT: A Practical Checklist

Because REITs are externally funded, payout-driven property companies, the analysis checklist looks different from a standard stock screen. Six areas carry most of the weight.

1. Occupancy and same-property NOI growth

Occupancy — the percentage of rentable space actually leased — is the vital sign of a property portfolio. Look for stable or rising occupancy paired with growth in same-property net operating income (NOI), which strips out acquisitions and shows whether the existing buildings are earning more. Rising occupancy with flat NOI can mean the REIT is buying occupancy with concessions; falling occupancy with rising NOI can mean it is pushing rents into a soft market. The trend and the reason matter more than the snapshot.

2. FFO/AFFO growth and payout coverage

As covered above, grow the FFO and cover the dividend with AFFO, and most other sins are forgivable. Check the AFFO payout ratio over several years, not one quarter, and be skeptical of dividend growth that consistently outruns cash-flow growth.

3. The debt maturity ladder

Because REITs refinance constantly, when debt comes due matters as much as how much there is. A well-run REIT shows a laddered maturity schedule — no single year with a wall of refinancing — a high share of fixed-rate debt, modest leverage (net debt to EBITDA commonly in the 4x–6x range for healthier names), and comfortable interest coverage. A REIT that must refinance a large slug of cheap 2021-era debt at much higher current rates faces years of slowly rising interest expense that leaks straight out of FFO.

4. Net asset value (NAV)

A REIT owns buildings, and buildings have market values. Analysts estimate NAV per share by valuing the property portfolio at private-market cap rates, subtracting debt, and dividing by shares. REIT shares can trade at premiums or discounts to NAV for long stretches. A persistent discount can signal a bargain or a portfolio the market distrusts; a persistent premium can signal quality or over-enthusiasm. NAV is an estimate, not a fact — cap-rate assumptions move the answer a lot — but the premium/discount is a useful second opinion on the price-to-FFO multiple.

5. Management and alignment

REITs constantly raise capital and transact properties, so management quality shows up directly in per-share results. Favor teams with a record of issuing shares above NAV rather than below it, buying and selling properties at sensible points in the cycle, and holding meaningful personal stakes. Externally managed REITs — where the manager is a separate company paid fees on assets — carry an incentive to grow assets rather than per-share value and deserve extra scrutiny.

6. Sector fundamentals

Finally, step back to the sector. The best-run office REIT of the past five years still fought a structural headwind; an average data-center REIT was carried by a tailwind. Sector selection has historically explained more of the return spread between REITs than stock selection within a sector. If you are not prepared to form a view on the sector, a diversified REIT index fund does the allocation for you. You can explore how 360head Stockiq scores individual names on our how it works page.

A Tale of Two Sectors: Offices vs Data Centers

Nothing illustrates why REIT analysis is sector-first like the divergence between office and data-center real estate in the 2020s.

Office REITs face a structural decline, not a cyclical dip. The shift to remote and hybrid work after 2020 cut the amount of space companies need per employee, and national U.S. office vacancy climbed to record territory — around 20% or higher by the mid-2020s, according to major brokerages such as Cushman & Wakefield and Moody's. Crucially, the damage is uneven: new, amenity-rich "Class A" towers in strong locations have continued to lease, while older Class B and C buildings face obsolescence, write-downs, and in some cases hand-backs to lenders. Long leases mean the revenue erosion arrives slowly; they also mean it persists for years. Some office REITs may prove to be bargains if pessimism overshoots — but "cheap" is not a thesis when the demand curve itself has shifted.

Data-center REITs face the opposite problem: more demand than they can physically serve. Cloud migration and, since 2023, the AI build-out have driven absorption to records, with vacancy in major markets falling to the low single digits — around 1% to 3% in primary North American markets in recent CBRE surveys. The binding constraint has become electrical power and grid connection, not customers. Rents and development pipelines have responded accordingly.

The honest counterpoints: data-center valuations already reflect years of expected growth, the AI demand behind them is concentrated among a few enormous customers, and a pause in hyperscaler spending would hit the sector hard. Office, meanwhile, could see sharper recoveries than consensus expects in the strongest cities if return-to-office norms keep tightening. Neither outcome is knowable in advance — which is exactly why position sizing and diversification matter more than conviction. What the divergence teaches is the durable lesson: in REITs, what kind of building you own is destiny.