Real Estate · REITs
What Is FFO? Funds From Operations Explained
FFO (funds from operations) is the REIT industry's standard earnings measure: what it is, how Nareit defines it, and why net income does not work for REITs.
Selborne Research · REITs coverage: 8 guides, 6 company profiles, a primer and Excel model
Educational analysis. This guide is not investment advice or a recommendation to buy or sell any security, and it is not personalised.
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FFO Is the REIT’s Version of Earnings
FFO, funds from operations, is the number REIT analysis is built on. It exists because a REIT’s net income does not tell you what the business earns. Nareit, the US REIT industry body, defined it in 1991 to fix one distortion: accounting depreciation writes a REIT’s buildings down every year on a fixed schedule, whether or not they have lost value, and the charge is big enough to swamp the income statement. Net income ends up far below the cash the portfolio throws off. FFO strips the charge out, so the sector is valued on price-to-FFO where almost everything else uses price-to-earnings.
A REIT quoted on a multiple is almost always quoted on FFO. Get clear on what FFO includes, and what it leaves out, before anything else.
The Nareit Definition
Nareit publishes the definition, which is what makes FFO comparable across REITs. It builds up from net income:
FFO = net income + real estate depreciation & amortisation − gains on property sales + impairments of depreciable real estate
Each adjustment removes something that misstates operating performance. Real estate depreciation goes back in because it assumes the buildings are wearing out when they usually are not. Gains and losses on property sales come out because they are one-offs: leave them in and a year of heavy disposals looks like a year of strong operations. Impairments of depreciable real estate go back in for the same reason as depreciation, since they are non-cash write-downs of the same buildings. What remains is the portfolio’s recurring income.
Why Net Income Fails for a REIT
Depreciation is the whole reason FFO exists. A company that owns well-located, well-maintained buildings must depreciate them anyway, on a schedule unrelated to their value. For a large REIT the charge runs to hundreds of millions a year, deducted from income while the buildings may be appreciating. So a REIT can grow its cash flow and report thin or falling net income in the same year, purely because of an accounting convention.
FFO removes that distortion and leaves the rest of the income statement alone. It is net income with property depreciation, disposal gains and impairments taken out, and nothing else. The narrowness helps. With few, defined adjustments, FFO stays comparable from one REIT to the next in a way a more heavily massaged number would not.
How FFO Is Used
FFO does two jobs. It is the denominator of price-to-FFO (P/FFO), the sector’s equivalent of the P/E ratio: a REIT trading at 15 times FFO is priced at fifteen years of its current funds from operations. And it is the base for payout analysis. A REIT’s dividend is measured against FFO, or better against AFFO, because earnings are the distorted number FFO exists to replace.

Comparing REITs on P/FFO works only because both FFO figures follow the same Nareit rulebook. One line further down, at AFFO, that stops being true.
Where FFO Stops: The Handover to AFFO
FFO has one large blind spot, and it is why a second metric exists. It adds back all the property depreciation, but a landlord does spend cash each year to keep the buildings let: maintenance capital, tenant improvements, leasing commissions. FFO ignores that spending, so it overstates the cash available for a dividend. AFFO, adjusted funds from operations, puts the spending back. It measures distributable cash better, at the cost of no longer being a defined, comparable number. The full comparison, and why AFFO is worth the loss of comparability, is in the FFO vs AFFO guide.
Start with FFO because it is standardised, then move to AFFO before judging a dividend. A payout that FFO covers and AFFO does not is being paid with money the buildings need.
FFO is where REIT analysis starts. The primer carries it through to AFFO per share and a payout screen.
- 15 sections, NAV / cap-rate
- 37 pages
- three-segment property NAV DCF + FFO/AFFO bridge
- 2 worked examples
- FFO per share, same-store NOI, occupancy, leverage
- 6-company applied set
The Excel model is the primer's two worked examples live across 13 sheets: change the cap rate, NOI growth or discount rate and the valuation moves.
See what's in the Equity REIT Sector Primer →£25 PDF · £59 with the Excel model · £159 for all three Real Estate industries
Frequently Asked Questions
- What is FFO?
- FFO, funds from operations, is the real estate industry's standard measure of a REIT's operating performance, defined by Nareit. It starts from net income and adds back real estate depreciation and amortisation, then strips out gains and losses on property sales and impairments of depreciable real estate. The result is a measure of the recurring cash the portfolio generates, cleaned of the accounting depreciation that makes a REIT's net income understate what it actually earns. Because the definition is published and fixed, one REIT's FFO is comparable with another's.
- How is FFO calculated?
- FFO = net income + real estate depreciation and amortisation − gains on property sales + losses on property sales + impairments of depreciable real estate. In practice you take reported net income, add back the large non-cash property depreciation charge, remove the gains from selling buildings (which are one-off and not operating income), add back any impairments, and the figure you are left with is FFO. Most REITs report it and reconcile it from net income in their results, and the reconciliation is worth reading because the adjustments below the FFO line are where AFFO and company-defined variants creep in.
- Why is FFO used instead of net income for REITs?
- Because accounting depreciation makes net income almost useless for a REIT. Depreciation writes a building's value down on a fixed schedule whether or not it has actually lost value, and a well-kept property in a good location usually has not. That non-cash charge is large enough to dominate a REIT's income statement, so reported earnings badly understate the cash the portfolio produces. FFO adds the real estate depreciation back, which is why the sector is valued on price-to-FFO rather than a price-to-earnings multiple.
Read next
FFO vs AFFO: What's the Difference and Why It Matters
Nareit defines FFO; nobody defines AFFO. The adjustments each REIT makes, and how to read them.
AFFO for Towers: What It Shows That FFO Misses
Tower AFFO is the dividend-capacity metric. AFFO per share ranks nothing across different share counts; the multiple is what compares, inside a 15–22× band.
REIT Screening Checklist: 8 Metrics to Track
Occupancy, NOI growth, AFFO payout, leverage. Good/caution/red flag thresholds included.
See it applied
These company profiles apply the concepts from this guide to real public companies.
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