Cap Rate vs IRR: Real Estate Return Metrics Explained (2026)
Cap rate measures a property's income yield today. IRR captures total return including leverage, appreciation, and timing.
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Finance & Investment
Cap Rate Calculator 2026
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NOI-based formula
Rental and commercial real estate
How to Calculate Cap Rate: Formula, NOI, and a Worked Example
Capitalization rate measures how much income a property generates relative to its price, before any financing is applied. A higher cap rate means more income per dollar invested, but it often signals higher risk or a less desirable market. Cap rate works in both directions: you can calculate it from NOI and price, or reverse it to find the implied property value from a target rate.
The Cap Rate Formula
Cap Rate (%) = NOI / Property Value x 100
Example: $48,000 NOI / $800,000 = 6.00% cap rate
Reverse formula: Property Value = NOI / Cap Rate
Example: $48,000 / 0.06 = $800,000 implied value
What Goes Into NOI
NOI equals gross rental income minus a vacancy allowance (typically 5-10%) minus all operating expenses. Operating expenses include property taxes, insurance, management fees (8-10% of rent), maintenance, and landlord-paid utilities. Mortgage payments and capital expenditures are excluded because cap rate is a pre-financing metric.
Worked Example: 4-Unit Apartment Building
You are evaluating a 4-unit building listed at $800,000. Each unit rents for $1,200 per month. You estimate 5% vacancy and $18,000 in annual operating expenses.
Gross rents: 4 x $1,200 x 12 = $57,600/yr
Vacancy (5%): - $2,880
Effective gross income: $54,720
Operating expenses: - $18,000
NOI: $36,720
Cap Rate: $36,720 / $800,000 = 4.59%
A 4.59% cap rate is reasonable for a major metro market where appreciation drives returns. In a secondary market where comparable multifamily properties trade at 7%, the same NOI implies a value of only $524,000, which means the $800,000 price is hard to justify unless you can raise rents or reduce expenses.
Cap rate tells you the property-level return before debt. To measure total investment return across a full hold period, pair this with the IRR Calculator, which accounts for all cash flows including the exit.
Cap Rate Calculator for Rental Property: NOI Inputs by Property Type
Rental properties have different cost structures depending on asset type, which directly affects your NOI and therefore your cap rate. A single-family rental and a 10-unit apartment building can have very different operating expense ratios even if their gross rents are similar.
Typical NOI Inputs by Property Type
| Property Type | Vacancy | Management | Maintenance |
|---|---|---|---|
| Single-family rental | 5-8% | 8-10% of rent | $3,000-$6,000/yr |
| Multifamily (5+ units) | 4-6% | 8-12% of rent | $800-$1,500/unit/yr |
| Short-term rental | 20-30% equiv. | 20-30% of revenue | Higher, factor in furnishings |
| Commercial / retail | 5-10% | 4-6% of rent | Varies by lease structure |
Multifamily Cap Rate Calculation
10 units x $1,100/mo x 12 = $132,000 gross income
Vacancy 5%: - $6,600
Operating expenses: - $52,000
NOI: $73,400
Cap Rate: $73,400 / $1,200,000 = 6.12%
Cap rate evaluates the property before financing. Once you have your cap rate, model the debt side with the DSCR Loan Calculator to check whether property income covers mortgage payments, or use the Commercial Mortgage Calculator to model the full financing picture.
How to Calculate Cap Rate on Commercial Property
Commercial cap rates use the same formula as residential, but the NOI calculation differs based on lease structure. Triple-net (NNN) leases shift property taxes, insurance, and maintenance to the tenant, which reduces the landlord's operating expenses and makes NOI much closer to gross rent. Gross leases keep those expenses on the landlord's books, which means a higher expense load and lower NOI for the same rent.
Commercial Cap Rates by Asset Class (2024-2025)
| Asset Class | Typical Cap Rate | Lease Type | Expense Load |
|---|---|---|---|
| Industrial (prime) | 4-6% | NNN | Low (tenant pays) |
| Grocery-anchored retail | 5-7% | NNN / modified | Low to moderate |
| Office (suburban) | 6-9% | Gross or modified | High (landlord pays) |
| Net lease (single tenant) | 4-6% | NNN | Very low |
| Strip mall / inline retail | 6-8% | Modified gross | Moderate |
| Self-storage | 5-7% | Monthly | Moderate |
NNN Retail Cap Rate Example
10,000 sq ft NNN retail at $22/sq ft/yr = $220,000 gross
Vacancy (5%): - $11,000
Landlord expenses (NNN, minimal): - $15,000
NOI: $194,000
At 6% cap rate: $194,000 / 0.06 = $3,233,333 implied value
For larger commercial deals, lenders focus on the debt service coverage ratio rather than cap rate when sizing loans. Use the DSCR Loan Calculator to check whether your NOI comfortably covers the projected debt service.
Cap Rate vs ROI: What Each Metric Actually Measures
Cap rate and ROI are often used interchangeably, but they measure very different things. Cap rate is a property-level metric that treats the asset as if it were bought all-cash. ROI measures what you actually earn on the cash you invested, including the effect of leverage, loan paydown, and appreciation when you sell.
| Metric | What It Measures | Includes Financing? | Best Used For |
|---|---|---|---|
| Cap Rate | Income yield on property value | No | Comparing properties and markets |
| Cash-on-Cash Return | Annual cash flow on equity invested | Yes (debt service) | Year 1 cash return after mortgage |
| ROI | Total return on capital invested | Yes (full picture) | Total deal performance at exit |
| IRR | Time-weighted return over hold period | Yes (all cash flows) | Multi-year investment comparison |
A 5% cap rate deal bought with 75% financing at 7% interest will produce a very different ROI than the same deal bought all-cash. The cap rate stays constant in both cases because it only looks at property income relative to price. Cash-on-cash return and IRR are where the effect of leverage shows up.
For a full picture of investment performance over a multi-year hold, use the IRR Calculator alongside this cap rate tool.
Common Mistakes to Avoid
Using gross rent instead of NOI
Cap rate uses Net Operating Income, not gross rent. A property with $60,000 in gross rents but $20,000 in expenses has a $40,000 NOI. Using gross rent overstates the cap rate and makes the deal look better than it is.
Forgetting vacancy in the calculation
Even a fully occupied property will experience vacancies over time. Leaving out a 5-8% vacancy factor produces an NOI that no real property will consistently achieve.
Including mortgage payments in expenses
Cap rate is a pre-debt metric. Including mortgage principal and interest in your expense calculation produces a meaningless hybrid number that is neither cap rate nor cash-on-cash return.
Comparing cap rates across different property types
A 6% cap rate on an industrial building and a 6% cap rate on a retail strip mall are not equivalent risks. Cap rate comparisons are only meaningful between similar asset types in similar markets.
Using the seller's pro forma NOI without verification
Sellers often present optimistic NOI based on projected rents or low expense estimates. Always build your own NOI from actual leases, tax bills, and verified expense history before calculating cap rate.
Frequently Asked Questions
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Sources & References
1
Appraisal Institute: The Appraisal of Real Estate, 14th Edition ↗
Primary reference for the income capitalization approach to real estate valuation, including the definition and application of the capitalization rate in commercial property appraisal.
2
CBRE Research: U.S. Cap Rate Survey (2024) ↗
Annual survey of capitalization rates across major US markets and property types, used as a benchmark for what constitutes typical cap rates in different sectors.
3
National Council of Real Estate Investment Fiduciaries (NCREIF): Property Index ↗
Source for long-run cap rate data across institutional-quality commercial real estate, providing context for historical cap rate levels and trends.
HR
Hassaan Rasheed
Developer and Researcher, CalculatorFlux
Researches and verifies the formulas, methodology, and source data behind each calculator on CalculatorFlux. All tools are built and checked against the cited references before publication.
Last updated: June 2026