Buying a Marathon, FL Rental: $56,513 and a License That Dies

Jacob Mishalanie
Aug 19
10 min read

Updated: 8 hours ago

A Marathon closing has two separate traps waiting for a buyer who isn't paying attention. The first is numeric: Islamorada, the next Key up the chain, posts its own strong typical year, and it's tempting to average it into a Marathon file to make the comp set look bigger. The second is legal and far more consequential — the City of Marathon's vacation rental license is annual and does not transfer with the deed. A seller's active listing history means nothing to a buyer who hasn't applied for their own license.

The sourced Marathon figure, covering August 2025 through July 2026, is $56,513 in typical annual revenue across 1,067 active listings, with an average nightly rate of $534, occupancy of 39.3 percent, and revenue per available night of $220. That's a real, city-specific number — not Islamorada's $46,255, and not a Keys-wide average that blends multiple islands with different permitting regimes into one misleading figure.

This guide covers what the $56,513 figure actually means, how Marathon's calendar runs (March peaks, September is the trough), what the license-does-not-transfer rule requires of a new owner, and why treating a 30-plus-night minimum as if it were the market's typical stay length would badly misread the numbers. This is not legal advice.

What a Marathon Rental Actually Earned

The AirROI extract for the trailing twelve months puts typical Marathon revenue at $56,513 across 1,067 active listings. Average nightly rate ran $534, occupancy was 39.3 percent, and revenue per available night worked out to $220 — figures consistent with a high-ADR, moderate-occupancy Keys market where rates carry more of the annual total than pure occupancy does.

Year over year, revenue moved plus 1.3 percent while active supply grew plus 19.1 percent. Read those together: a meaningfully larger pool of listings arrived, and the typical year barely grew to match it. That's not a crash — Marathon's revenue held roughly flat rather than declining — but it does mean a 2026 buyer should expect continued competition from new supply rather than assuming a market about to tighten on its own. A packet that cites the plus-1.3-percent figure without the plus-19.1-percent supply context is telling an incomplete story.

Professionally managed listings account for about 35.3 percent of the market, with Vacation Rentals of the Florida Keys holding the largest single share at 117 listings. Superhost share runs 48.0 percent. Those figures point to a market with meaningfully more professional management presence than a smaller inland town would carry, which is worth knowing before assuming self-management alone will be competitive against an established local operator's marketing reach.

Marathon's Calendar: March Peaks, September Falls Off

March is Marathon's single strongest revenue month, with February and April rounding out the peak-three — a late-winter-into-spring season consistent with snowbird and spring-break travel patterns in the Florida Keys. September is the softest month, with October and November also running low, which lines up with the tail end of hurricane season and the pre-holiday travel lull.

Typical stay length is 7.3 nights, with guests booking an average of 104 days ahead — a notably longer lead time than most drive-market rentals, consistent with a destination that guests plan well in advance rather than book on short notice. That long booking window matters for pricing strategy: a Marathon host has real visibility into demand months out, and pricing adjustments made close to arrival have less room to work with than in a market where guests book a few weeks ahead.

It's worth being precise about what "softest month" means here. September being the revenue trough doesn't mean the property sits empty — it means both rate and occupancy soften relative to the March peak. A buyer building a 2026 pro forma should model September, October, and November conservatively rather than smoothing the whole year into a single average rate.

The reason worth naming is straightforward Atlantic hurricane-season timing: September sits near the statistical peak of the season, and travelers booking months in advance tend to steer clear of the Keys during that stretch even when no storm actually threatens a given week. That's a demand pattern tied to calendar risk perception as much as to actual weather outcomes, and it shows up consistently enough in the data to plan around rather than treat as a one-year anomaly.

The License Dies With the Sale — Plan Accordingly

The single most consequential fact for a Marathon buyer isn't a revenue number — it's that the City of Marathon vacation rental license is annual and does not transfer at sale. A new owner has to apply fresh, regardless of how long the seller has operated the property or how established the listing's review history is. Treating a seller's active license and booking history as something that automatically carries over to a new owner is a mistake that surfaces at exactly the wrong moment, mid-closing or just after.

City Fire Rescue, relevant to life-safety inspection requirements, sits at Station 14, 8900 Overseas Highway. Code Compliance handles the licensing side. A buyer should confirm the current license fee and application timeline directly with the city before closing — not after — since a gap between the seller's license lapsing and the buyer's new license being issued can mean real lost operating days.

On the tax side, Monroe County's Tourist Development Tax runs 5 percent on rentals of six months or less, which is a county-level obligation separate from the city license. Florida's DBPR (Department of Business and Professional Regulation) vacation rental registration applies statewide and needs to be in place before the first night is rented — remitting tax on unregistered nights is not the same as holding a valid permit, and a postcard of Sombrero Beach on a listing doesn't substitute for either.

Stack those three layers up and a buyer is actually managing three separate compliance relationships on one property: the City of Marathon license, the Monroe County tourist tax remittance, and the statewide DBPR registration. Missing any one of the three can put the whole operation at risk even if the other two are current, so a closing timeline should build in enough runway to have all three squared away before the first guest checks in, not scrambled together after.

Islamorada Is a Different Key, a Different Number

Islamorada, the neighboring Key to the north, posts its own typical year of $46,255 — a real, sourced figure, but a different city's figure, with its own permitting system and its own city fee schedule (referenced separately at $1,325 for city registration). Averaging Marathon's $56,513 with Islamorada's $46,255 to build a bigger "Keys" comp set produces a number that describes neither city's market accurately, since the two operate under separate ordinances and separate demand patterns.

Key West and Key Colony Beach are two more Keys that shouldn't be folded into a Marathon file. Key West carries its own well-known and considerably more restrictive short-term rental framework, and Key Colony Beach is a distinct incorporated city with its own rules. None of the three belongs on a Marathon underwriting line unless clearly labeled as a separate comp, cited for context rather than blended into the total.

Unincorporated Monroe County — the parts of the Keys outside any city's limits — carries yet another separate fee structure, referenced at $490, and falls under a different desk entirely from the City of Marathon's licensing office. A parcel's actual jurisdiction (city of Marathon versus unincorporated Monroe County) needs to be confirmed before assuming which fee schedule and which rules apply.

Reading the 30-Plus-Night Minimum Correctly

About 273 listings in the Marathon sample — 25.6 percent — set a 30-plus-night minimum stay. That's a meaningful share of the market, but it's a platform-level minimum-stay setting, not an occupancy or vacancy figure, and it shouldn't be read as the market's typical booking pattern. The more common setting across the broader sample is a 7-to-29-night minimum, used by 61.7 percent of listings, according to AirROI's own categorization.

Typical stay length across the market is still 7.3 nights, regardless of how many listings set a longer minimum on the platform. A buyer who reads the 25.6 percent thirty-plus-night figure as evidence of widespread long-term or mid-term demand is misreading a listing-setting statistic as a booking-behavior statistic — they measure different things. Some hosts set 30-plus-night minimums specifically to target furnished mid-term renters (relocating workers, seasonal staff), which is a legitimate strategy, but it doesn't change what the typical Marathon guest's stay actually looks like.

The honest way to use this figure in a buyer packet is to cite it as what it is — a minimum-stay setting affecting roughly a quarter of listings — rather than rounding it into a vaguer claim about occupancy or converting it into an assumption about guaranteed long-term income.

What a Buyer Packet Should Actually Carry

A Marathon buyer packet built to hold up under scrutiny should lead with the city's own typical year — $56,513 across 1,067 listings, ADR $534, occupancy 39.3 percent, RevPAR $220, for the August 2025 through July 2026 vintage. It should name March as the peak month with February and April rounding out the peak-three, and September as the trough with October and November running low as well.

It should state plainly that the vacation rental license is annual and does not transfer at sale, name Fire Rescue (Station 14, 8900 Overseas Highway) and Code Compliance as the relevant desks, and note the 5 percent Monroe County Tourist Development Tax and the statewide DBPR registration requirement as separate obligations from the city license itself.

And it should keep Islamorada's $46,255, Key West, Key Colony Beach, and unincorporated Monroe County's $490 figure all on their own clearly labeled lines — cited if relevant to the buyer's decision, never blended into the Marathon total. A packet built this way gives a lender something they can actually verify against public city and county records, which is the entire point of putting real numbers on paper.

Why the Property Mix Matters as Much as the Averages

Marathon's active listing pool skews toward larger properties: entire-home listings make up 96.0 percent of the sample, houses represent 79.4 percent, and eight-plus guest capacity is common at 49.5 percent. That mix reflects what actually competes well in this market — groups and families booking a full house for a week-plus Keys vacation, not solo travelers or short weekend stays. A buyer evaluating a smaller or differently configured property should weigh how it fits against that dominant house-and-large-capacity profile rather than assuming the citywide averages apply evenly across every property type.

One new large-capacity listing or one new boutique inn-style property entering the market can shift that property mix and, over time, the citywide averages that depend on it. That's a smaller effect in a 1,067-listing market than it would be in a 121-listing market like Many, but it's still worth tracking, particularly for a buyer comparing a specific property's likely performance against the blended citywide figure rather than against truly comparable listings.

The practical takeaway: a buyer's own property-level comp set — similar size, similar capacity, similar proximity to Sombrero Beach or other named draws — will produce a more reliable underwriting number than the citywide $56,513 average applied uniformly. The citywide figure is the right starting point and the right number to cite in a packet, but it's a starting point, not a substitute for direct comparable research on the specific address.

Frequently Asked Questions

How much did typical Marathon listings earn last year?

Typical Marathon listings earned about $56,513 across 1,067 active rentals for the August 2025 through July 2026 vintage. Average night was $534, occupancy 39.3 percent, and revenue per available night $220. Year over year ran plus 1.3 percent, with active supply moving plus 19.1 percent.

Does a Marathon vacation rental license transfer when I buy the property?

No. The City of Marathon vacation rental license is annual and does not transfer at sale. A new owner must apply for their own license regardless of the seller's operating history. Confirm the current fee and application timeline with the city before closing, not after.

When is Marathon's strongest month?

March is the single strongest revenue month, with February and April rounding out the peak-three. September is the softest month, with October and November also running low. Model the shoulder and low months conservatively rather than smoothing the year into one average.

Can I average in Islamorada's numbers?

No. Islamorada is a separate Key with its own typical year of $46,255 and its own permitting system and city fee schedule. Averaging it with Marathon's $56,513 produces a number that describes neither city accurately. Keep the two figures on separate labeled lines.

What taxes apply on top of the city license?

Monroe County's Tourist Development Tax runs 5 percent on rentals of six months or less, and Florida's DBPR vacation rental registration applies statewide and must be in place before the first night is rented. Both are separate from, and required in addition to, the City of Marathon's own license.

Is a 30-plus-night minimum the same as long-term occupancy?

No. About 273 listings, 25.6 percent of the Marathon sample, set a 30-plus-night minimum, but that's a platform setting, not an occupancy figure. Typical stay length across the market is still 7.3 nights. The more common minimum-stay setting is actually 7-to-29 nights, used by 61.7 percent of listings.

How far ahead do guests book a Marathon stay?

About 104 days on average — a notably longer lead time than a drive-market rental, consistent with a destination guests plan well in advance. That long booking window gives a host real visibility into demand months out, though it also means late pricing adjustments have less room to work with.

Should I hire a manager in Marathon?

Professionally managed listings make up about 35.3 percent of the market, with Vacation Rentals of the Florida Keys holding the largest single share at 117 listings. That's a meaningful professional-management presence, worth weighing against self-management given the established local competition.

Is unincorporated Monroe County the same as the City of Marathon?

No. Unincorporated Monroe County carries its own separate fee structure (referenced at $490) and falls under a different regulatory desk from the City of Marathon's licensing office. Confirm a parcel's actual jurisdiction before assuming which rules and fees apply.

Are Key West and Key Colony Beach the same market as Marathon?

No. Key West carries its own considerably more restrictive short-term rental framework, and Key Colony Beach is a distinct incorporated city with its own rules. Neither belongs folded into a Marathon comp; cite them separately if relevant.

What should a Marathon buyer packet carry?

The confirmed $56,513 typical year on 1,067 listings, ADR $534, occupancy 39.3 percent, RevPAR $220, the license-does-not-transfer requirement with Fire Rescue and Code Compliance contacts, the 5 percent county tax and statewide DBPR registration, and Islamorada, Key West, Key Colony Beach, and unincorporated Monroe County figures all kept on separate labeled lines.

Work with Crest & Cove Creative

Marathon STR marketing fails when a buyer assumes the seller's license carries over — it doesn't, and Islamorada's stronger year isn't Marathon's either. Name the failure mode the guest can check on the listing.

Send us the live Marathon listing and we'll build marketing around what this specific property can deliver, while you handle the fresh license application directly with the city. Reach out at crestcove.co or (256) 998-7502. Send the live listing draft and the facts you can actually cite.

Reach out at crestcove.co or (256) 998-7502.