Updated September 2026.
A pro forma cap rate divides projected annual net operating income (NOI) by a stated property price or value. It shows what the income-to-price ratio would be if the projection is achieved. Before using the number, check the income period, the denominator, and the work required to reach that NOI.
Pro forma cap rate = projected annual NOI ÷ stated property price or value × 100.
The Office of the Comptroller of the Currency's Commercial Real Estate Lending handbook defines a capitalization rate using stabilized NOI and sales price. Its NOI definition excludes loan principal and interest, income taxes, depreciation, and capital items. That underwriting definition includes a replacement reserve.
State how your model treats reserves so the comparison is consistent. Keep the actual capital-work budget visible separately. A roof replacement may be necessary to support the business plan even though the project cost isn't an ordinary operating expense.
Debt payments belong in the financing and cash-flow analysis. Deducting them from NOI changes the numerator and makes the result unsuitable for comparison with a cap rate calculated before debt service.
Keep the denominator fixed when comparing current and projected income. Here is a hypothetical example, with no recommendation about a particular property:
The 7% figure depends on achieving the additional $40,000 of annual NOI. It doesn't tell you how much cash you'll need, when the increase will arrive, or what you'll receive after loan payments.
Suppose the plan also requires $200,000 of improvements. Dividing $140,000 by the $2.2 million purchase price plus improvement budget gives about 6.36%. Label this as an income-to-cost calculation and show what the cost basis includes. It answers a different question from the 7% price-based ratio.
Ask for a bridge from current NOI to projected NOI. For each change, record the amount, supporting source, expected timing, and cost to deliver it. Start with the leases, rent roll, collection records, and operating statement rather than an asking-rent headline.
A useful review explains which rents are already under signed leases and which depend on future leasing. It also shows concessions, vacancy and collection assumptions, and who pays each operating expense. Compare the expense budget with current bills and known upcoming costs.
For an operating review, use Coastline's owner NOI audit. It helps frame the questions to ask about income, expenses, and the records behind a report.
Keep a downside case beside the main projection. In the example above, the $120,000 NOI case shows the effect of a smaller income increase. Also budget for the period before stabilization, including vacant space, leasing costs, and construction delays. A future annual ratio cannot pay today's bills.
There is no single percentage in this guide that makes a property a good purchase. A 7.5% cap rate alone doesn't establish fair pricing or a particular level of risk. Review comparable transactions with consistent NOI definitions, property condition, lease terms, and income assumptions.
Assess financing and the cash required to execute the plan separately. If you are using projected NOI to estimate a future value, identify the assumed exit cap rate and test a less favorable case. The result is an estimate, not a promised sale price.
Enter annual NOI and the positive price or value you're testing. Record whether the income is current or projected. The calculator performs the division only. It doesn't validate the assumptions or calculate cash-on-cash return.
Use the result with the source records and budget behind it. If a projected increase in NOI drives the decision, ask who will deliver each change and how progress will be measured.