How this instrument works
Adjusted funds from operations starts where funds from operations leaves off. FFO already corrects net income for real estate's biggest accounting quirk — it adds back depreciation, since a well-kept building rarely loses value the way a GAAP depreciation schedule assumes — but FFO still is not cash. It carries two further distortions: the capital a landlord actually has to spend every year just to keep roofs, elevators, and HVAC systems working, and the flattening effect of straight-line rent accounting, which spreads a tenant's contractual rent increases evenly across the lease term instead of recognizing the cash that changed hands in this specific period. AFFO strips both out.
REIT analysts and income-focused portfolio managers reach for AFFO instead of FFO when they need to know whether a trust's dividend is funded by cash the business actually generated, rather than by an accounting figure that still has real spending buried inside it. A trust can report FFO comfortably above its dividend while AFFO — after recurring capex and the rent adjustment come out — sits close to or under the payout, a sign that management is stretching to hold a distribution its underlying cash flow does not fully support.
Both adjustments rest on judgment calls a company's own management makes: what counts as recurring maintenance capex rather than growth spending, and how the straight-line rent schedule was built in the first place. Neither figure is standardized the way GAAP net income is, so AFFO reported by one REIT is not guaranteed to be built the same way as AFFO reported by another. Comparing the payout ratio across two trusts means checking what each one actually subtracted, not just trusting the label.
- Enter Funds from operations (FFO), $ — the REIT's reported FFO for the period, taken from its earnings release.
- Enter Recurring capital expenditures, $ — maintenance spending needed to keep existing properties rentable, not growth or acquisition capex.
- Enter Straight-line rent adjustment, $ — the non-cash amount GAAP added to smooth escalating lease payments over the lease term.
- Read Adjusted funds from operations — FFO minus both adjustments, the cash-basis figure a dividend is actually measured against.
Worked example — a $7.5M FFO REIT
Take a REIT reporting Funds from operations (FFO), $ of 7,500,000 for the quarter. Its properties needed Recurring capital expenditures, $ of 800,000 to stay rentable — new roofs, parking resurfacing, HVAC replacements — and its Straight-line rent adjustment, $ came to 200,000, the non-cash portion of GAAP rent recognition. Subtracting both from FFO, 7,500,000 minus 800,000 minus 200,000, leaves Adjusted funds from operations of exactly 6,500,000.
That 6,500,000 is the figure most REIT dividend payout ratios are actually measured against, not the 7,500,000 FFO headline. If the trust distributes 6,000,000 in dividends that quarter, the payout looks conservative measured against FFO but consumes most of the tighter AFFO figure — the gap a careful analyst checks before assuming the distribution has room left to grow.
Questions
How is AFFO different from FFO?
FFO already adds real estate depreciation back to net income, but it still includes the cash a REIT must spend on ordinary maintenance and the non-cash smoothing straight-line rent accounting applies to leases. AFFO subtracts both, which is why it usually reads lower than FFO and is considered the closer proxy for cash actually available to distribute.
Why subtract recurring capex but not all capital spending?
Growth capex — buying a new property or funding an expansion — is spending a REIT chooses to make; recurring capex is the maintenance a trust has no real choice about if it wants to keep existing buildings rentable. Folding growth spending into the subtraction would understate cash genuinely available for distribution, since that spending is discretionary rather than a cost of holding what the trust already owns.
What does the straight-line rent adjustment actually correct for?
Under GAAP, a lease with rent that rises each year gets recognized as one flat average amount every period, not the actual cash the tenant pays that year. Early in the lease the reported rent exceeds the cash received; late in the lease it falls short. The adjustment backs that averaging out so AFFO reflects the rent cash that actually changed hands in the period being measured.
Can AFFO be negative, and what does that mean?
Yes — if recurring capex and the rent adjustment together exceed FFO, AFFO turns negative, meaning core cash generation did not even cover the maintenance spending needed to keep the properties in working order that period. A trust reporting positive FFO alongside negative AFFO is often propping up its headline number with deferred maintenance that will eventually show up as a bill.
Why do two REITs' AFFO figures sometimes look impossible to compare?
Recurring capex and the rent adjustment both involve judgment calls management makes about what counts as maintenance versus growth spending, and how a lease schedule was built. Because neither adjustment is standardized the way GAAP net income is, one trust's AFFO is not guaranteed to be built the same way as another's — read the footnotes before comparing the ratio across companies.
Is AFFO the same thing as free cash flow?
No. Free cash flow subtracts all capital expenditures from operating cash flow for any business; AFFO is a real-estate-specific refinement of FFO that isolates recurring maintenance capex from growth spending and separately corrects for straight-line rent, a distortion unique to how leases are accounted for. The two figures answer related but distinct questions about cash left after keeping assets in place.
References
- SEC Investor.gov — Real Estate Investment Trusts (REITs)
- Nareit — the trade association that defined the FFO/AFFO reporting standard
Read this first: This instrument shows arithmetic, not advice. Real offers add fees, taxes and terms that vary by lender and place — verify the figures against your actual paperwork before deciding anything.