Adjusted Funds From Operations (AFFO)
Adjusted Funds From Operations (AFFO) refines the REIT earnings metric FFO by subtracting recurring capital expenditures required to maintain properties and making other adjustments for straight-line rent and lease incentives, providing an approximation of a REIT's true free cash flow available for dividends and growth.
While Funds From Operations (FFO) solved the distortion caused by real estate depreciation under GAAP, analysts recognized that FFO itself could overstate a REIT's cash-generating capacity. The most significant issue is that maintaining commercial properties requires ongoing capital spending — roof replacements, HVAC system upgrades, tenant improvement allowances, and leasing commissions — none of which are subtracted in the FFO calculation. A REIT that must spend heavily each year simply to retain existing tenants and keep buildings functional has meaningfully less distributable cash than FFO alone would suggest.
AFFO corrects for this by deducting what are often called 'maintenance capital expenditures' or 'recurring capex' from FFO. It also adjusts for straight-line rent accounting, a GAAP convention that spreads total lease revenue evenly across a lease term even when actual cash rent escalates over time, as well as for lease incentives paid to tenants upfront. The goal is to arrive at a figure that more closely approximates the actual cash a REIT generates and can distribute to shareholders.
Formula: AFFO = FFO - Recurring Capital Expenditures - Straight-Line Rent Adjustments - Lease Incentives + Other Adjustments
AFFO is particularly important for evaluating dividend sustainability. Because REIT dividend payouts are regulated and most REITs distribute the large majority of their income, comparing the dividend to AFFO rather than FFO gives a more conservative and honest assessment of coverage. An AFFO payout ratio below 85-90% is generally considered healthy for most REIT subsectors.
Public Storage (PSA), the largest self-storage REIT in the United States, and AvalonBay Communities (AVB), a major apartment REIT, are examples of companies where analysts closely track AFFO to assess whether dividend growth is sustainable given the actual cash economics of their property portfolios.
A complication with AFFO is that there is no single standardized definition. Unlike FFO, which NAREIT has formally defined, AFFO calculations vary by company and analyst, making cross-company comparisons more difficult. Some REITs report their own version of AFFO under slightly different labels. Investors must review footnotes carefully when comparing AFFO figures across different REITs to ensure the calculations are truly comparable. Despite this limitation, AFFO is widely regarded as a superior metric to FFO for assessing true distributable cash flow and valuing REIT equities on a free cash flow basis.