FFO Calculator (Funds From Operations)

Funds From Operations, usually shortened to FFO, is one of the core performance measures used for real estate investment trusts. The reason is simple: GAAP net income includes depreciation and amortization charges that can be large for real estate, while the economic value of a well-located and maintained property may not decline in the straight-line way accounting schedules imply. FFO starts with net income, adds back real-estate depreciation and amortization, and removes property sale effects so recurring property operations are easier to see.

This calculator follows the compute logic in the form exactly. It starts with net income, adds depreciation and amortization, adds losses on property sales, subtracts gains on property sales, and subtracts interest income. It then divides the result by shares outstanding to show FFO per share. That interest-income subtraction is a calculator-specific operating adjustment; when you compare the answer with a REIT supplement, confirm whether management uses the same convention.

Formula

The formula used by this calculator is:

$\text{FFO} = \text{net income} + \text{depreciation and amortization} + \text{losses on property sales} - \text{gains on property sales} - \text{interest income}$

The per-share output is:

$\text{FFO per share} = \frac{\text{FFO}}{\text{shares outstanding}}$

The calculator also reports total FFO adjustments:

$\text{total FFO adjustments} = \text{depreciation and amortization} + \text{losses on property sales} - \text{gains on property sales} - \text{interest income}$

Use dollar amounts from the same reporting period. Quarterly net income should be paired with quarterly depreciation, quarterly sale gains and losses, quarterly interest income, and the quarter’s share count. Annual figures should be annual throughout.

Worked example

Suppose a REIT reports net income of $2,000,000, depreciation and amortization of $1,200,000, losses on property sales of $100,000, gains on property sales of $300,000, interest income of $50,000, and 5,000,000 shares outstanding. The calculation is:

$\text{FFO} = \$2{,}000{,}000 + \$1{,}200{,}000 + \$100{,}000 - \$300{,}000 - \$50{,}000$

$\text{FFO} = \$2{,}950{,}000$

Then:

$\text{FFO per share} = \frac{\$2{,}950{,}000}{5{,}000{,}000} = \$0.5900$

The total adjustment is $950,000, because the add-backs and deductions together increase net income by that amount. If the same company had no interest income, the calculator would show $3,000,000 of FFO; if it had larger sale gains, the FFO figure would fall. That sensitivity is why property-sale and non-operating income lines should be reviewed instead of treated as routine rent performance.

How FFO is used

REIT investors use FFO to compare operating performance, estimate valuation multiples, and test dividend coverage. Price to FFO is a common REIT analogue to price to earnings, while FFO per share is often compared with dividends per share. A REIT that pays $0.45 per share in dividends against $0.59 of FFO per share has more apparent coverage than one paying $0.58, but that is only the first screen. The next step is to ask how much recurring capital spending, leasing cost, debt service, and redevelopment funding must be paid after FFO.

FFO is also useful next to property-level metrics. Net operating income explains what buildings generate before financing and corporate costs, so the net operating income calculator helps connect rental revenue to operating profit. The cap rate calculator can turn stabilized NOI into an implied property value. If the REIT carries significant debt, the DSCR calculator helps translate operating income into debt-service coverage. For a cash-flow-oriented follow-up, use the AFFO calculator, which subtracts recurring maintenance and capital expenditures after FFO.

Caveats and interpretation

FFO is not a GAAP measure and is not identical to cash flow from operations. It can still include revenues that have not been collected in cash, excludes some capital needs, and may be affected by acquisition timing, development starts, or unusual corporate expenses. Company supplements may also define normalized FFO, core FFO, or adjusted FFO differently. Read the reconciliation, especially the treatment of impairments, gains or losses from control changes, unconsolidated joint ventures, and non-real-estate income.

Sector context matters. Lodging REITs can have volatile FFO because room rates and occupancy reset quickly, while net-lease REITs may show steadier figures because tenants pay long-term contractual rent. Office REITs can report acceptable FFO today while facing future leasing costs or tenant rollovers. Industrial and data-center REITs may have stronger growth but heavier development pipelines. A clean FFO calculation gives a useful baseline, but it should be paired with balance-sheet leverage, lease maturity schedules, same-store NOI, occupancy, and capital expenditure disclosures.

Common mistakes

• Comparing this calculator’s FFO with a company number that does not subtract interest income.
• Treating depreciation add-backs as free cash without checking recurring capital expenditure needs.
• Using diluted shares in one period and basic shares in another without noticing the difference.
• Ignoring property sale gains, which can make net income look stronger than recurring operations.
• Comparing FFO multiples across REIT sectors without considering growth, lease duration, and leverage.

Sources

• Nareit, 2018 Restatement of the Funds From Operations White Paper — physical PDF page 2, “II. Definition of FFO,” defines the GAAP starting point and listed real-estate adjustments.
• CFI, Funds From Operations — explanation of FFO adjustments and REIT analysis.
• Nareit, Adjusted Funds From Operations (AFFO) — related REIT metric used after FFO.