AirDNA Income Potential vs Real Ownership Cost

AirDNA’s Rentalizer will hand a prospective vacation home buyer a number like $68,000 in projected annual gross revenue and let that figure do the persuading. The number that matters sits two layers down: after a 25% management fee, 45% vacancy, and the carrying costs AirDNA never models, that same property can still cost its owner more than $30,000 a year to hold. The gap between gross revenue projection and net carrying cost is where most second home math quietly falls apart.

The U.S. short-term rental market reached an average occupancy of rental income offset potential of roughly 55% through mid-2025, according to AirDNA data reported in 2025. That is a market-wide figure, not a property-specific guarantee, and it is the single most important reason a gross revenue projection and a real ownership cost rarely converge. This analysis reconciles the two using a total cost of ownership framework, then expresses the result as a net carry rate that lets buyers compare properties across price points and markets.

The numbers most buyers anchor on

Sources: AirDNA market data (2025); Curinos via Experian (April 2026); Bankrate (April 2026); IRS Publication 527 (2025).

What AirDNA tells you — and what it leaves out

AirDNA’s strength is granular revenue modeling. The Rentalizer tool draws on more than 500,000 active listings to estimate annual revenue, average daily rate, and occupancy for a specific address, according to AirDNA’s 2025 documentation. For a buyer trying to gauge whether a market supports short-term rental demand at all, that is the right starting point. The platform’s national outlook for 2026 projects occupancy easing by roughly 1% as available listings grow 4.6%, which is a useful signal that the supply side is no longer scarce.

Revenue is only one side of the ledger, though. A gross revenue estimate excludes every carrying cost: the mortgage, the management fee that consumes a fifth to a third of that revenue, maintenance, insurance, utilities, HOA dues, and the travel cost of getting to a property you also intend to enjoy. AirDNA models the top line. The owner lives with the bottom line. Bridging them requires building the full total cost of ownership framework from the purchase price up.

Building the real carrying cost

Consider a $850,000 lake property — squarely within the range a $150k+ household evaluates — financed with 20% down at the 7.60% average second home mortgage rate reported by Curinos in April 2026. The components stack as follows.

Mortgage PITI dominates. A $680,000 loan at 7.60% over 30 years runs about $4,810 monthly in principal and interest, or roughly $57,700 annually before taxes and insurance. Property taxes on an $850,000 second home vary widely by state but commonly land near 1.1% of value, adding about $9,350. Specialized short-term rental insurance — standard homeowner’s policies don’t cover rental activity — adds several thousand dollars; Awning’s 2026 breakdown cites pricing of $7 or more per booked night, which at moderate occupancy approaches $4,000 to $5,000 a year.

Operating costs compound from there. Management runs 20% to 35% of gross rental revenue for full-service short-term rental operators, per SkyRun’s 2026 industry figures, converging with the 20–30% range standard across the sector. Maintenance for vacation properties typically runs 1% to 2% of value annually — $8,500 to $17,000 here — because turnover-heavy use wears a property faster than owner-occupancy. Utilities billed year-round, HOA or community dues, and travel to and from the property round out the carry. Each of these is a line item AirDNA’s revenue estimate never touches, and several scale with how aggressively the property is rented. The property management fee structure alone can swing net economics by $10,000 or more depending on whether an owner self-manages or hands off entirely.

Sources: Curinos via Experian (April 2026); Awning (2026); SkyRun (2026). Maintenance and use-pattern costs are modeled estimates within published ranges, not property-specific figures; AirDNA did not return address-level revenue for a generic model property.

Netting out the rental income

Now the offset. Suppose AirDNA’s market data supports roughly $44,000 in gross rental revenue for this property at the area’s prevailing occupancy. That is the headline number a listing agent quotes. Strip the 25% management fee and the figure drops to about $33,000. Account for the realistic vacancy embedded in a ~55% occupancy market — the property sits empty nearly half the year — and the net rental income that actually offsets carrying cost lands closer to $28,000 to $30,000 once cleaning, supplies, and platform fees are absorbed.

Set that against the gross TCO. With roughly $103,300 in annual carrying cost and approximately $29,000 in net rental income, the owner is absorbing about $74,000 a year out of pocket. The mortgage principal portion builds equity rather than evaporating, which softens the true economic cost — but on a cash basis, the rental income covers less than a third of the carry. This is the arithmetic AirDNA’s clean revenue projection obscures.

The Finluxy Vacation Home Net Carry Rate

To compare properties across price points, the relevant metric is the Finluxy Vacation Home Net Carry Rate: annual net carrying cost after rental income offset, divided by purchase price. For the lake property, $74,000 net carry on an $850,000 purchase produces a rate of about 8.7% per year. That is the share of the property’s value the owner pays annually to hold it, after rental income has done all the offsetting it can.

Net Carry Rate = (annual TCO − net rental income) ÷ purchase price × 100. Self-managed scenario removes the management fee but adds owner labor not priced here. Figures are modeled estimates within published cost ranges.

The spread between the three rows is the entire decision. Self-managing cuts the net carry rate by more than two points — but substitutes the owner’s time for the manager’s fee, and the ~55% occupancy market average assumes professional pricing and turnover that many self-managers don’t match. A pure personal-use second home, renting 14 days or fewer, carries the highest rate but the simplest tax profile. Which row a buyer lands on depends less on the property than on how they intend to use it.

The overlooked insight: the 14-day rule reshapes the whole calculation

Most coverage treats rental income as a straightforward subtraction from carrying cost. The data shows it is not — because the act of renting changes the property’s tax classification, and that reclassification can erase the deductions that made renting attractive. Under IRS Publication 527 (2025), if personal use exceeds the greater of 14 days or 10% of the days the property is rented at fair market price, the IRS treats the dwelling as a residence rather than a pure rental. Expenses must then be allocated proportionally, and rental deductions are capped at rental income — losses can’t offset other income.

The inverse rule is the genuinely overlooked one. Rent the property 14 days or fewer in a year and the rental income is entirely tax-free and need not be reported, per Pub 527. That creates a sharp discontinuity: a household renting exactly 14 days keeps every dollar tax-free, while one renting 200 days enters full IRS 14-day rule tax math with proportional expense allocation, the 3.8% Net Investment Income Tax on certain income, and management fees eating a quarter of gross. The middle ground — renting enough to matter but using the property enough to trip the personal-residence threshold — is where owners most often end up, and it is the least tax-efficient position of the three. The net carry rate looks attractive only if the use pattern is deliberately engineered around that threshold.

Methodology

What this means for a $150k+ household

At this income level, a vacation property is rarely a pure investment and rarely a pure indulgence — it is the awkward hybrid that the 14-day rule punishes most. A household earning $150,000 to $300,000 can absorb a high net carry rate, but should price it honestly: an 8.7% annual net carry on an $850,000 property is roughly $74,000 a year, more than a third of a $200,000 gross income before tax. The relevant comparison is not whether AirDNA’s revenue projection looks good in isolation, but whether that net carry rate beats renting the same destination outright for the 30 or 40 nights the household actually uses it.

The decision splits cleanly. If the property will be used heavily and rented lightly, treat it as a lifestyle purchase, keep rentals under the 14-day tax-free threshold, and stop pretending rental income will offset much. If it will be rented aggressively, accept that it is an investment property net carry analysis with the tax complexity and management drag that implies — and that a sub-6% net carry rate requires either self-management or a market where revenue genuinely runs high. The trap is the middle: buying for personal enjoyment, then renting just enough to trigger reclassification without renting enough to meaningfully offset the carry. For buyers weighing specific destinations, the regional cost structure matters as much as the use pattern — a Colorado mountain home ownership cost profile differs sharply from a Florida storm-risk cost structure, and high-tax coastal markets like the Hamptons carrying cost breakdown push the net carry rate higher still before any rental income is counted. Run the net carry rate before the emotional walkthrough, not after.