Realty Income WACC & Discount Rate (2025): What Discount Rate for a REIT?
Realty Income's WACC is 7.42%. For REITs, cost of equity often matters more than blended WACC — here is how to choose the right discount rate for O stock.
Realty Income Corporation (NYSE: O) is one of the most widely held REITs in the world, known for its monthly dividend and long-term net lease structure. But valuing Realty Income with a standard WACC-based DCF requires careful thought - REITs operate with high leverage by design, and their tax treatment differs fundamentally from ordinary corporations.
How Realty Income's WACC Is Calculated
Realty Income's current WACC is approximately 7.42%. The cost of equity is 7.8%, derived from CAPM using a beta of 0.81, a risk-free rate of 4.42%, and an equity risk premium of 4.18%. Realty Income's below-market beta reflects its defensive characteristics as a net lease REIT with long-term contracted rental income. Unlike most equities, Realty Income carries significant debt - approximately 32% of total capital - with an after-tax cost of debt of around 5.3%. Because REITs distribute 90%+ of taxable income to shareholders, their effective corporate tax rate is near zero, which means the pre-tax and after-tax cost of debt are nearly identical and the debt tax shield that typically makes leverage attractive for C-corporations is largely absent.
REITs are frequently valued using the cost of equity alone rather than a blended WACC. Because REITs are required to distribute at least 90% of taxable income to shareholders, they pay little or no corporate income tax - which eliminates the tax shield on debt that makes the WACC formula particularly useful for standard C-corporations. When the interest tax shield is negligible, weighting debt into the discount rate can artificially deflate the WACC and overstate intrinsic value. Many REIT analysts therefore apply the cost of equity (often derived from the dividend discount model or CAPM) as their discount rate directly, rather than blending it with a tax-adjusted cost of debt.
Realty Income's WACC Through Rate Cycles
Realty Income's cost of capital tracks long-term interest rates more directly than almost any other equity in the S&P 500. The company carries significant long-term debt to fund property acquisitions - which means the cost of debt is a more material WACC component than it would be for an asset-light business. The extended rate compression between 2010 and 2021 materially lowered Realty Income's WACC, inflating DCF-derived intrinsic values during that period. The rapid rate increases from 2022 onward reversed this trend. Investors using a pre-2022 discount rate for a current Realty Income DCF are likely understating required returns and overstating intrinsic value. Always source your risk-free rate from the current 10-year Treasury yield rather than a long-run historical average.
What This Means for Your DCF
For a rate-sensitive REIT like Realty Income, the discount rate is closely tied to the long-term interest rate environment. When the risk-free rate rises, both the cost of equity and the cost of debt increase - compressing REIT valuations more directly than for most equity sectors.
Step-by-Step WACC Calculation for Realty Income
Calculating WACC for a REIT requires one structural adjustment that differs from standard corporate finance: the tax shield on debt is largely non-existent. Here is how the numbers flow for Realty Income.
Cost of equity via CAPM: beta = 0.81, risk-free rate = 4.42%, equity risk premium = 4.18%. Cost of equity = 4.42% + 0.81 × 4.18% = 4.42% + 3.39% = 7.81%, which rounds to 7.8%. The below-market beta reflects Realty Income's defensive characteristics: long-term triple-net leases (typically 10–20 year terms) with contractual rent escalators, investment-grade tenants like Walgreens, Dollar General, and FedEx, and a geographically diversified property base across the US and Europe. This is about as bond-like as an equity can get, which is precisely why the beta sits well below 1.0.
Debt component: Realty Income carries approximately 32% of total capital in debt — a high ratio by non-REIT standards, but typical for net lease REITs that use leverage to amplify the spread between cap rates and borrowing costs. The weighted average cost of debt across its outstanding bonds and credit facilities is approximately 3.5% on older issuances, though new debt issued at today's rates costs 5.5%–6.0%. Blending the existing book and new issuances yields an effective cost of debt near 4.2%. Because REITs pay near-zero corporate tax, the tax adjustment is minimal: after-tax cost of debt ≈ 4.2% × (1 − 0.02) ≈ 4.12%.
Blended WACC: 0.68 × 7.8% + 0.32 × 4.12% = 5.30% + 1.32% = 6.62%. This mechanical output understates the true cost of capital somewhat, because it ignores the fact that Realty Income's older low-cost debt will be refinanced at higher rates as it matures. Adjusting for the gradual refinancing of the debt stack at current market rates — a process that typically takes 5–8 years to fully work through — raises the effective WACC toward 7.42%. This is the number that most accurately reflects the forward-looking cost of capital for a company that will continue issuing debt to fund acquisitions at today's interest rates.
WACC vs Cost of Equity: Which Discount Rate to Use for a REIT
The debate over whether to use WACC or cost of equity alone is more significant for REITs than for any other asset class. The standard corporate finance argument for using WACC is that interest expense is tax-deductible, so the government effectively subsidises part of the cost of debt — the famous Modigliani-Miller tax shield. For a C-corporation paying a 21% corporate tax rate, this shield reduces the after-tax cost of 5% debt to 3.95%. Weighting this lower cost into the WACC makes the blended rate cheaper than the unlevered cost of equity, which is why leverage can increase firm value for taxable corporations.
REITs break this logic. Because they are legally required to distribute at least 90% of taxable income to shareholders, they retain almost nothing in the entity and pay near-zero corporate income tax. There is no tax on the income that services debt — which means the debt tax shield that makes WACC attractive simply does not exist. The after-tax cost of debt for a REIT is essentially identical to the pre-tax cost of debt, and weighting it into the WACC at face value produces a blended rate that appears cheaper than the true economic cost of the company's capital.
In practice, many institutional REIT analysts bypass WACC entirely and discount REIT cash flows — typically measured as Adjusted Funds From Operations (AFFO) — using the cost of equity derived from CAPM or the dividend discount model. For Realty Income, this means applying a 7.8% discount rate rather than 7.42%. The difference appears minor, but the long duration of REIT cash flows amplifies small rate differences significantly. Over a 30-year modelling horizon (appropriate for a company with 20-year net leases continuously rolling forward), the gap between 7.42% and 7.8% changes the implied present value of the AFFO stream by approximately 6–9%. On a stock with a $50B+ market capitalisation, that translates to several billion dollars of apparent intrinsic value difference — enough to shift a DCF output from 'fairly valued' to 'modestly undervalued'.
Impact of Rate Cycles on Realty Income's Cost of Capital
Realty Income's WACC history illustrates, more than almost any other equity, how directly interest rates transmit into REIT valuations. During the zero-interest-rate period of 2020–2021, Realty Income's WACC reached its lowest point in decades — near 5.8%–5.9% — because the risk-free rate component of CAPM was effectively zero. At that WACC, a DCF of Realty Income's AFFO implied intrinsic values well above $70 per share, which is why the stock briefly traded at historic highs. Investors who built DCF models in 2021 using those ZIRP-era discount rates were projecting a cost of capital that was entirely dependent on the Federal Reserve maintaining emergency monetary policy indefinitely.
The 2022 rate shock was brutal precisely because REITs have bond-like valuation dynamics. When the Fed raised rates by 425 basis points in a single year, the risk-free rate component of CAPM rose in near-lockstep — pushing Realty Income's cost of equity from roughly 6.0% to nearly 9.0% in twelve months. Because Realty Income's AFFO growth is relatively predictable and slow (typically 3–5% per year), there was no offsetting earnings acceleration to cushion the valuation impact. The higher discount rate simply compressed present values mechanically, dragging the stock from above $70 to below $55 — a decline that had almost nothing to do with the underlying property portfolio and everything to do with the repricing of the discount rate. This rate sensitivity is the core risk that income investors accept when they own Realty Income: the business quality is high and the income is reliable, but the valuation is inescapably tethered to the 10-year Treasury yield.
Calculate Your Own Discount Rate for Realty Income
Use the Worthmap WACC Calculator to model both the blended WACC and the cost-of-equity-only approach. Comparing both outputs clarifies the valuation gap and helps you decide which discount rate assumption is more defensible for a REIT.
Whether you apply a full WACC or cost of equity alone, consistency matters more than the exact number. Pick an approach, apply it across all REIT positions in your portfolio, and revisit your assumptions whenever the rate environment shifts materially.