The Cap Rate Waterfall Formula
Every dollar of rent flows through vacancy, then expenses. What remains is Net Operating Income — and NOI divided by property value is your cap rate. See every step.
Interactive Waterfall
Switch scenarios to see how the waterfall shifts across deal types.
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What Each Step Means
Understanding the waterfall is understanding how rental income actually works.
Gross Potential Rent
This is the income you'd collect if every unit was rented at market rate every day of the year. It's the starting point — your ceiling before any losses.
Vacancy & Credit Loss
No property is 100% occupied every day. Vacancy accounts for turnover gaps, non-payment, and market softness. Typical range: 3–10% depending on market.
Operating Expenses
Property taxes, insurance, maintenance, management fees, CapEx reserves, utilities, and HOA fees. These are the cost of keeping the property running — before debt service.
Net Operating Income
What remains after vacancy and expenses. This is the "income" the property produces independently of how it's financed — the universal metric for comparing properties.
Why the Waterfall View Matters
A linear formula hides more than it reveals. Visualization changes what you notice.
You Can't Fix What You Can't See
Most investors know their rent. Far fewer have actually mapped every dollar that disappears before it reaches NOI. The waterfall makes invisible leaks visible.
Expenses Are More Controllable Than They Look
Property taxes are fixed — but insurance, management, and maintenance are not. Competitive-bidding insurance alone can save $50–$150/mo on a typical rental.
Property Value Multiplies Every NOI Dollar
At a 6% cap rate, every $100/mo improvement in NOI adds $20,000 to property value. The waterfall shows you where those gains live.
What Moves Your Cap Rate
Knowing the formula is step one. Knowing the levers is step two.
Increases Your Cap Rate
- Raise rents to market rate
- Reduce vacancy through retention
- Cut insurance via annual re-shopping
- Negotiate lower management fees
- Buy at a lower purchase price
Decreases Your Cap Rate
- Rent drops below market
- Higher vacancy / long turnover
- Rising property taxes
- Deferred maintenance becomes CapEx
- Market value appreciation (good problem)
See Your Property's Waterfall
Enter your property's numbers and watch the waterfall recalculate in real time — then use the sensitivity sliders to stress-test every assumption.
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