AFFO Calculator (Adjusted Funds From Operations)

Adjusted Funds From Operations, or AFFO, is a REIT cash-flow measure built on top of Funds From Operations. FFO removes some accounting effects from net income, especially real-estate depreciation and property sale gains or losses. AFFO goes one step further by asking how much recurring economic capacity remains after ordinary maintenance and recurring capital expenditures. That makes it especially useful when reviewing dividends, buybacks, leverage, and the true cost of keeping a portfolio competitive.

This calculator matches the stated inputs’s calculation exactly. It takes FFO, adds rent increases or straight-line rent adjustments, subtracts routine maintenance costs, and subtracts recurring capital expenditures. If shares outstanding are greater than zero, it also calculates AFFO per share. If shares are entered as zero, total AFFO is still calculated, but the per-share result is shown as a dash and the underlying per-share variable is set to zero by the form.

Formula

The AFFO formula used here is:

$\text{AFFO} = \text{FFO} + \text{rent increases} - \text{routine maintenance costs} - \text{recurring capital expenditures}$

Net adjustments are:

$\text{net adjustments} = \text{rent increases} - \text{routine maintenance costs} - \text{recurring capital expenditures}$

If shares are greater than zero:

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

The calculator also reports AFFO as a percent of FFO:

$\text{AFFO as \% of FFO} = \frac{\text{AFFO}}{\text{FFO}} \times 100$

When FFO is zero, the percentage is shown as a dash to avoid a division by zero. Maintenance, capital expenditures, and shares cannot be negative in the form, but FFO and rent adjustments may be negative if the reported period justifies it.

Example

Assume a REIT has $1,200,000 of FFO, $80,000 of rent increases or straight-line rent adjustment, $150,000 of routine maintenance, $250,000 of recurring capital expenditures, and 1,000,000 shares outstanding. The calculation gives:

$\text{AFFO} = \$1{,}200{,}000 + \$80{,}000 - \$150{,}000 - \$250{,}000$

$\text{AFFO} = \$880{,}000$

Net adjustments equal:

$\text{net adjustments} = \$80{,}000 - \$150{,}000 - \$250{,}000 = -\$320{,}000$

Per share:

$\text{AFFO per share} = \frac{\$880{,}000}{1{,}000{,}000} = \$0.88$

AFFO as a percent of FFO is:

$\frac{\$880{,}000}{\$1{,}200{,}000} \times 100 = 73.33\%$

The result means recurring deductions reduce FFO by $320,000. If the REIT paid $0.70 per share in dividends for the same period, the dividend would be covered by this model’s $0.88 of AFFO per share. If it paid $0.95, the payout would exceed the model’s recurring adjusted cash flow.

How AFFO is used

AFFO is most often used to evaluate dividend safety. REITs are required to distribute taxable income, but the accounting measure used for tax purposes is not the same as recurring cash available to shareholders. FFO may look healthy even when an older portfolio needs heavy roof, elevator, HVAC, tenant improvement, or room-renovation spending. AFFO forces that maintenance reality into the conversation.

AFFO also helps compare REITs that look similar on FFO but have different property conditions. A newly built apartment portfolio may require lighter recurring capital expenditures than an older office portfolio with frequent lease turnover. A hotel REIT may need periodic room refreshes to protect average daily rate and occupancy, making AFFO especially important alongside the ADR calculator and occupancy rate calculator. For REIT-level performance, the FFO calculator shows the starting point. For property-level operating income before corporate and financing effects, use the net operating income calculator. Debt pressure can be reviewed with the DSCR calculator.

Caveats and interpretation

AFFO is not standardized. One REIT may subtract only recurring building capital expenditures, while another also adjusts straight-line rent, leasing commissions, tenant improvements, amortization of above-market or below-market leases, stock compensation, or nonrecurring transaction costs. Because definitions vary, AFFO is strongest when you review the reconciliation line by line.

Do not assume every deduction is bad. Maintenance and recurring capital expenditures can protect rents, reduce vacancy, and support long-term value. A REIT that underinvests may show higher AFFO temporarily while storing up future problems. The quality of AFFO matters: cash collected from stable tenants is stronger than AFFO supported by optimistic rent adjustments or delayed maintenance. Compare the metric with same-store NOI, occupancy, leasing spreads, debt maturity schedules, and management’s capital plan.

AFFO is also period-sensitive. A quarter with heavy seasonal maintenance can look weaker than a cleaner quarter even when annual cash generation is on plan. For that reason, many analysts review trailing twelve-month AFFO, management’s annual guidance, and the timing of capital projects before concluding that dividend coverage has changed.

Common mistakes

• Comparing AFFO from two companies without checking whether recurring capex is defined the same way.
• Using annual FFO with quarterly maintenance or quarterly capex.
• Ignoring share issuance, which can reduce AFFO per share even when total AFFO rises.
• Treating AFFO as audited GAAP cash flow instead of a supplemental non-GAAP measure.
• Assuming a high AFFO payout ratio is safe without reviewing debt maturities and property age.

Displayed results use the currency, time period, percentage, or other units named in the tool and round only for presentation; retain additional precision when carrying a result into another calculation.

Sources

• Nareit, Adjusted Funds From Operations (AFFO) — REIT glossary definition of AFFO.
• CFI, Adjusted Funds From Operations — explanation of AFFO adjustments and use cases.
• Nareit, Funds From Operation (FFO) — starting point for understanding AFFO.