Cap Rate Calculator
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What Is a Cap Rate?
Cap rate (short for capitalization rate) is a measure of how much income a rental property generates relative to its value. For example, if you run the numbers on a $300,000 property with $21,000 in annual net income, you get a 7% cap rate ($21,000 / $300,000).
The cap rate percentage tells you what the property earns each year as a proportion of what it’s worth, without factoring in any mortgage.
For residential investors, cap rate is typically the first number you’ll run when evaluating a potential buy-and-hold deal. It doesn’t tell you everything you need to know, but it gives you a reliable, consistent basis for comparing properties before you get into the specifics of financing, cash flow projections, and market conditions.
The Cap Rate Formula
The cap rate formula requires just two inputs:
Cap Rate = Net Operating Income (NOI) ÷ Current Market Value × 100
- Net Operating Income (NOI) is your annual rental income minus all operating expenses. Mortgage payments don’t count here, as cap rate is always calculated before debt service.
- Current Market Value is what the property is worth today: the purchase price if you’re buying, or a current appraisal if you already own it.
The result comes out as a percentage. A $400,000 property generating $30,000 in NOI has a cap rate of 7.5%.
How to Calculate Cap Rate: Step-by-Step
You can calculate cap rate manually in three steps, or simply enter your figures into the calculator above and it will handle the arithmetic for you.
Step 1: Add up your gross annual income. That’s rental income for the full year, plus anything else the property generates: laundry, parking, storage fees.
Step 2: Subtract your operating expenses to get NOI. This includes property taxes, insurance, management fees, maintenance, any utilities you cover, and a vacancy allowance. Leave the mortgage out entirely.
Step 3: Divide NOI by the property’s current market value, then multiply by 100. That’s your cap rate as a percentage.
Cap Rate Calculation Example
Take a property renting for $2,500 a month. Here’s how the math works out:
- Monthly rent: $2,500 ($30,000/year)
- Vacancy allowance (5%): −$1,500
- Adjusted gross income: $28,500
- Annual operating expenses (taxes, insurance, management, maintenance): −$8,500
- NOI: $20,000
- Purchase price: $280,000
- Cap Rate: $20,000 ÷ $280,000 × 100 = 7.14%
For a deeper breakdown of how to work out NOI accurately, see our guide on how to calculate cap rate.
How to Use This Calculator
The calculator is designed to be quick and straightforward. Fill in the following fields and your cap rate will update instantly:
- Property value: the purchase price for a deal you’re analyzing, or today’s market value if you already own the property.
- Monthly rent: gross rental income before any deductions.
- Operating expenses: enter these monthly or annually. Cover everything: taxes, insurance, management, maintenance, and any utilities you pay. Leave out the mortgage.
- Results: your gross income, NOI, and cap rate update instantly.
Once you have a number, try tweaking it. What happens to your cap rate if rent goes up $150? What if you self-manage and drop the management fee entirely? The calculator makes it quick to pressure-test assumptions before you commit to a deal.
What Is a Good Cap Rate?
For residential rentals, most investors are looking somewhere between 5% and 10%. That range is wide for a reason: where you want to land depends on your market, your strategy, and how much risk you’re comfortable carrying.
Here’s a practical breakdown by property type and market context:
| Property Type / Market | Typical Cap Rate Range | What It Generally Signals |
|---|---|---|
| Single-family rental, high-demand metro | 4% – 6% | Lower risk, stable tenancy, lower yield |
| Single-family rental, mid-tier market | 6% – 8% | Balanced risk/return for most investors |
| Single-family rental, emerging or rural market | 8% – 10%+ | Higher yield, higher vacancy risk |
| Small multifamily (2–4 units) | 5% – 9% | Income diversification, more management overhead |
| Short-term / vacation rental | 8% – 12% | Higher income potential, higher operational risk |
A high cap rate isn’t automatically a good thing. Properties sitting above 9% or 10% usually come with a reason: higher vacancy risk, deferred maintenance, or a location where appreciation is limited. On the flip side, a 4% cap rate in a tight urban market often reflects the kind of stability and demand that protects your investment long term. Neither is wrong. It just depends on what you’re building toward.
One thing to watch if you’re financing the purchase: your cap rate needs to clear your borrowing cost, or you’re cash-flow negative from day one. Use our DSCR calculator alongside this one to check whether the income actually covers the debt.
5 Factors That Affect Cap Rate
Location: Nothing moves cap rates more than geography. Investors will accept a 4% return on a well-located property in a tight market because the demand is reliable and the downside is limited. Take that same property to a lower-demand area and buyers want 8% or more to justify the additional risk. Market strength is priced into cap rates whether you think about it that way or not.
Property type: Single-family rentals typically carry lower cap rates than small multifamily, which carries lower rates than commercial. It tracks with income stability: the more predictable the cash flow, the less return investors demand. A duplex gives you income from two units, but it also means more tenant turnover to manage.
Property condition: A property in good shape attracts better tenants and needs less money thrown at it. That lower risk profile keeps cap rates down. Distressed or older properties get priced with higher cap rates to account for what’s likely coming: deferred maintenance, turnover costs, capital improvements.
Rental strategy: Short-term rentals generally produce more income than long-term rentals, which pushes cap rates higher. The catch is operational complexity. Airbnb-style properties need constant marketing, dynamic pricing, and more hands-on management. The extra yield exists to compensate for all of that.
Market conditions: When rates are low and property values are climbing, cap rates compress as purchase prices rise faster than rents. When rates go up, values soften and cap rates tend to expand. If you’re timing a purchase, it’s worth understanding where you are in that cycle.
Cap Rate Limitations
Cap rate is a valuable starting point, but it’s not a complete picture on its own. Here are the key limitations to keep in mind before drawing conclusions from a single figure.
It ignores financing. Cap rate assumes you paid cash for the property. If you’re using a mortgage (and most investors are), your actual returns will depend heavily on your loan terms, interest rate, and down payment. Two properties with identical 7% cap rates can produce very different cash-on-cash returns once debt service is factored in. For financed deals, it’s worth pairing your cap rate analysis with a BRRRR analysis or a full cash flow model.
It’s a snapshot, not a projection. Cap rate reflects what the property is doing right now, against what it’s worth right now. It doesn’t account for future rent growth, capital expenditure requirements, or appreciation over time. A property with a modest cap rate in a market with strong rent growth can outperform a higher-cap-rate property in a market where rents have stalled.
The quality of the output depends on the quality of the inputs. Your cap rate is only as reliable as your expense estimates. Investors consistently underestimate maintenance costs and vacancy rates. It pays to be conservative: assume slightly higher vacancy and more repairs than you expect, particularly on older properties.
It’s most useful as a comparison tool. A 7% cap rate in isolation doesn’t tell you a great deal. It becomes meaningful when you’re comparing it to the 6% and 8.5% you ran on the other two properties in the same market. Cross-market comparisons can be misleading: a 7% cap rate in one city reflects very different underlying conditions to a 7% cap rate in another.
It doesn’t apply to every deal type. Fix-and-flips, development projects, and properties without a stable rental income don’t lend themselves well to cap rate analysis. For those scenarios, our house flipping calculator or hard money calculator will give you a more appropriate framework.
Cap Rate vs. Other Metrics
Cap rate is one piece of the puzzle. Most experienced investors run it alongside at least one or two other numbers before making a decision. Here’s how it stacks up against the alternatives:
| Metric | Formula | Includes Financing? | Best Used For |
|---|---|---|---|
| Cap Rate | NOI ÷ Market Value × 100 | No | Comparing properties on an unlevered basis |
| Cash-on-Cash Return | Annual Cash Flow ÷ Total Cash Invested × 100 | Yes | Measuring actual return on your invested capital |
| ROI (Return on Investment) | Net Profit ÷ Total Investment × 100 | Yes | Overall profitability including appreciation and equity |
| Gross Rent Multiplier (GRM) | Market Value ÷ Gross Annual Rent | No | Quick pricing screen before deeper analysis |
| DSCR | NOI ÷ Annual Debt Service | Yes | Qualifying for a rental property loan |
In practice, cap rate and cash-on-cash return tend to be used together. Cap rate shows you how a property performs on a pure income-to-value basis, which makes it useful for comparing deals without financing distorting the picture. Cash-on-cash return brings your actual loan terms into the equation, giving you a clearer view of what your invested capital is genuinely earning each year once the mortgage is paid.
The Gross Rent Multiplier is faster to calculate but considerably less precise, since it ignores operating expenses entirely. It works well as a quick first screen but shouldn’t be relied on for serious analysis. ROI takes the broadest view of all, incorporating equity growth and appreciation alongside income, which makes it particularly useful when evaluating long-term hold performance.
If you’re financing with a DSCR loan, that ratio will also be central to your lender’s decision. Most lenders want to see a DSCR of at least 1.25 before approving. Our DSCR calculator will run that figure for you alongside your other metrics.
Frequently Asked Questions
No, mortgage payments are excluded from the cap rate calculation. Net operating income is always calculated before debt service, which is precisely what makes cap rate useful for comparing properties regardless of how each one is financed. If you want to factor your specific loan terms into the analysis, cash-on-cash return is the more appropriate metric to use.
Not necessarily. A higher cap rate indicates higher income relative to the purchase price, but there’s usually a reason a seller is willing to offer that kind of yield. It could reflect a less desirable location, above-average vacancy, an older building with deferred maintenance, or a market with limited appreciation potential. In many cases, a lower cap rate in a strong, stable market represents a better long-term investment than a higher one in an area carrying more underlying risk.
A 7% cap rate means the property is expected to generate net operating income equivalent to 7% of its market value each year. On a $300,000 property, that works out to $21,000 annually before any debt service. It also implies a payback period of roughly 14 years on an all-cash purchase, though this doesn’t account for rent growth, appreciation, or sale proceeds down the line.
Yes, and this is broadly how appraisers approach income-producing properties. If you know the NOI and you know what cap rate comparable properties are trading at in the same market, you can estimate value by dividing the NOI by that rate. For example, a property with $25,000 in annual NOI in a market where similar properties trade at a 6.25% cap rate has an implied value of $400,000. It won’t be a precise valuation, but it’s a well-grounded starting point for negotiation.
Cap rate works best for stabilized rental properties with a consistent income history. If you’re evaluating a fix-and-flip, a development project, or a property that’s currently being repositioned, it’s not the right tool for the job. Our house flipping calculator is better suited to flip deals, and our BRRRR calculator is designed for properties you’re planning to hold and refinance.
Use your actual NOI from the past 12 months (your real income minus your real operating expenses) and divide by the property’s current market value, not the price you originally paid. Your purchase price reflects what the market looked like at that point in time. Dividing by today’s value gives you a much more accurate picture of how the property is performing right now. If you need a current value estimate, our ARV calculator uses comparable sales data to give you a working figure.
Additional Real Estate Calculators & Resources
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