Cap rate is the foundational metric for evaluating South Florida investment properties. Here's exactly how to calculate it, what the numbers mean, and how to use reverse cap rate to find your maximum purchase price.
Cap rate — capitalization rate — is one of the most important metrics in real estate investment analysis. It lets you compare properties of different sizes and prices on an apples-to-apples basis, and it helps you determine whether a South Florida property is priced correctly for its income. Here's how to calculate it and how to use reverse cap rate to work backwards from your target return.
The cap rate formula
Cap Rate = Net Operating Income (NOI) ÷ Property Value (or Purchase Price)
Where:
- Net Operating Income (NOI) = Gross Annual Rent − Vacancy Loss − Operating Expenses (taxes, insurance, management, maintenance, repairs — but NOT mortgage payments)
- Property Value = Current market value or the price you're considering paying
Example: A South Florida single-family rental priced at $400,000 rents for $2,400/month ($28,800/year). After 7% vacancy ($2,016), and operating expenses of $9,500 (taxes, insurance, management, maintenance), NOI = $17,284. Cap Rate = $17,284 ÷ $400,000 = 4.3%.
What good cap rates look like in South Florida by market
Cap rates vary significantly across South Florida's six counties and by property type:
- Coastal Palm Beach and Broward (luxury/primary homes): 3–4.5%. These markets are appreciation-driven — investors accept lower current income in exchange for strong long-term price growth.
- Inland Broward and West Palm Beach (workforce housing): 4.5–6%. Better cash flow, moderate appreciation.
- St. Lucie and Martin Counties: 5.5–7%+. Stronger cap rates, growing markets, lower entry prices.
- Highlands County: 6–8%+ for stabilized residential. Less appreciation history but strong income-to-price ratios.
- Small multifamily (2–4 units) across all markets: Generally 0.5–1% higher cap rates than single-family equivalents due to economies of scale.
Reverse cap rate: working backwards from your target return
Reverse cap rate is how investors determine their maximum purchase price given a target return. The formula flips:
Maximum Price = NOI ÷ Target Cap Rate
Example: You need a 6% cap rate to meet your return requirements on a Port St. Lucie rental. The property's NOI is $14,400/year. Maximum price = $14,400 ÷ 0.06 = $240,000. If the seller is asking $280,000, the deal doesn't hit your required cap rate — and you have a clear basis for either negotiating or walking away.
Cap rate vs. cash-on-cash return: what's the difference?
Cap rate assumes no mortgage — it evaluates the property's income as if purchased with all cash. This makes it useful for comparing properties regardless of financing. Cash-on-cash return accounts for your actual mortgage, measuring the return on your invested equity specifically. Both are important:
- Use cap rate to compare properties and assess market pricing
- Use cash-on-cash (or our Rental Property ROI Calculator) to evaluate actual returns given your specific financing
A property with a 5% cap rate can produce a 7–9% cash-on-cash return with the right leverage — because positive leverage amplifies the return on your invested equity. Conversely, high leverage in a low-cap-rate market can produce negative cash-on-cash. Understanding both metrics gives you the full picture on any South Florida deal.
