There's a different question from "is this property profitable" — and it's "is this property a good investment, compared to what I could be doing with the same money?" These questions are related, but they're not the same. A property can close the month in the black and still be a mediocre investment, if the capital tied up in it would earn more somewhere else.

Two metrics borrowed from traditional real estate exist to answer that second question: Cap Rate and Cash-on-Cash Return.

Cap Rate: the property's return, ignoring financing

Cap Rate (capitalization rate) measures the property's annual return as if it had been bought outright — it ignores financing on purpose, to let you compare different properties on an equal footing.

Cap Rate = annual NOI ÷ property value

NOI (Net Operating Income) is annual revenue minus operating costs — the same logic as real profit per property, summed across 12 months, but without deducting financing (if any) or income tax.

Example

Property valued at $650,000, with average real profit of $1,285/month (the same example from the fixed vs. variable costs guide) — $15,420 for the year.

Cap Rate = $15,420 ÷ $650,000 = 2.37%

For context: traditional long-term rental Cap Rates in major markets typically fall between 4% and 6%, depending on the city and neighborhood. A vacation rental with a 2.37% Cap Rate is, on that comparison alone, yielding less than an equivalent traditional rental — which doesn't necessarily mean the property is a bad deal (appreciation, personal use outside of peak season, and other factors come into play), but it's a concrete data point that changes the decision between "keep going as-is" or "adjust price or costs."

Cash-on-Cash Return: the return on what you actually put in

Cap Rate ignores financing by design. Cash-on-Cash Return does the opposite — it measures the return on the money that actually left your pocket, accounting for the down payment and any financing.

Cash-on-Cash Return = annual cash flow ÷ total cash invested

If that same $650,000 property was bought with a $200,000 down payment and financing for the rest, "total cash invested" is the down payment plus acquisition costs (closing costs, initial renovation) — not the property's full value. If that down payment plus costs adds up to $230,000, and annual cash flow (real profit minus loan payments) is, say, $4,200:

Cash-on-Cash Return = $4,200 ÷ $230,000 = 1.83%

This metric tends to come in lower than Cap Rate when financing is involved, because the loan payment eats into cash flow — but it answers a question closer to the reality of anyone who financed the purchase: "is the money I actually put in earning well, compared to other ways I could invest that same amount?"

Why these two metrics together tell a better story

Cap Rate alone ignores how the property was financed. Cash-on-Cash alone ignores the asset's total value. Used together, they answer different questions: Cap Rate compares the property against other properties (financed or not) on equal footing; Cash-on-Cash Return compares the return against the capital you specifically put at risk.

A low Cap Rate paired with a relatively better Cash-on-Cash Return can indicate the financing is "leveraging" the investment well — the reverse is also possible, and it only shows up when both numbers are calculated side by side.

What these two metrics don't capture

Neither one accounts for property appreciation — only operational return (rental income minus costs). A property with a low Cap Rate can still be a good investment if it's in a consistently appreciating area, and a high Cap Rate doesn't make up for a property in a stagnant or declining neighborhood. Cap Rate and Cash-on-Cash Return answer "how well does this property perform operationally," not "what will it be worth in 5 years" — they're complementary to appreciation analysis, not a substitute for it.

It's also worth remembering both assume stable occupancy and rate throughout the year, which is rarely true for a vacation rental — so it's worth recalculating using occupancy by season instead of a simplified annual average, especially for properties with strong seasonality.

What this math doesn't do for you yet — and what it already does

Worth being upfront about what this analysis depends on: both calculations start from the property's monthly real profit — the same number that motivated Hauslio to exist. Today, calculating Cap Rate and Cash-on-Cash Return is still manual math — Hauslio doesn't yet have a dedicated investor-metrics screen. What already exists is the hardest input to get any other way: real profit per property, month by month, automatically, without having to add up a single spreadsheet to arrive at the annual NOI these formulas start from.