How to research a rental arbitrage market before you pick a city

Most new operators pick a market the wrong way round. They find a unit they like, then check whether the city works. By then they are emotionally invested, a landlord is waiting and the research turns into a search for reasons to say yes.

Choosing the market first protects you. A good city will not save a bad deal, but a bad city will sink a good one. This guide gives you a repeatable method for researching any US market in a few evenings: check the rules and where they are heading, find demand you can name, measure the spread between rent and revenue, then look at supply and seasonality. It ends with a simple scorecard so you can compare two cities side by side. Every number here is an assumption for illustration, not a benchmark for any real place.

Rules come first because they are the only factor that can take a market to zero overnight. Revenue can be fixed with better pricing. A ban cannot.

Check each layer separately, because they do not always agree:

• State. Whether the state limits what cities can regulate, and how state-level lodging or sales taxes apply to short stays.
• County. Unincorporated areas often follow county rules rather than city rules, and some counties run their own registration or tax.
• City. Whether short-term rentals are allowed, which zones permit them, whether non-owner-occupied units are treated differently, and what permit or registration is required.
• Taxes. Which occupancy taxes apply, which ones the platforms collect and which ones the operator must file directly.

Then do the step most operators skip: read the direction of travel. A market that is open today but debating restrictions is a different bet from one that has been stable for years. To gauge it:

1. Search the city council and planning commission agendas and minutes for short-term rental items over the past year or two.
2. Look at when the current rules were last amended and whether amendments tightened or loosened them.
3. Check whether the city publishes enforcement activity, such as citations or a complaint hotline for short-term rentals.
4. Call the permitting office and ask plainly whether any changes are proposed. Write down who you spoke to and the date.

A market with clear rules, a working registration process and no pending changes scores well even if it is strict. Uncertainty is often worse than restriction. For the address-level version of this check, use our checklist of STR rules to verify before signing.

Good markets have reasons people need a bed there, and you should be able to list them. If you cannot name who is booking, you are guessing.

Short-term demand drivers: tourism, events and venues, a convention center, beaches or parks, a university with graduations and sports weekends, and weekend drive-in traffic from nearby metros.

Mid-term demand drivers: hospitals and medical centers that use traveling clinical staff, large employers that relocate people, military installations, construction or infrastructure projects, and insurance-displaced families after home damage.

Markets with both kinds of demand are more resilient. If short-term rules tighten, a property that can switch to stays of 30 nights or more still has a path. Our guide to mid-term rentals covers who books those stays and what they need.

To test demand rather than assume it, open the booking calendars of ten or so listings in the neighborhoods you are considering. Look three to six months out. Blocked dates across many comps suggest steady demand. Wide-open calendars in what should be a busy month are a warning, even if the city has a famous attraction.

Arbitrage works on the gap between what you pay the landlord and what the unit earns. Some markets have strong revenue but rents high enough to swallow it. Others have modest revenue and low rents that leave a healthy margin.

A quick way to compare cities is a simple ratio: estimated monthly gross revenue divided by monthly rent, for the same unit type.

1. Pick one unit type to compare across cities, for example a two-bedroom apartment.
2. Find typical long-term asking rent for that type in your target neighborhoods from current rental listings.
3. Estimate annual revenue from comparable furnished listings with a full year of history. Drop the top and bottom performers and use the middle.
4. Divide annual revenue by 12, then divide by rent.

Worked example (assumptions only): say a two-bedroom rents for $1,700 a month and middle-of-the-pack comps gross about $46,000 a year. That is roughly $3,830 a month, or a ratio of about 2.25. If another city has the same unit at $2,200 rent and $50,000 in revenue, the ratio is about 1.9. The second city earns more in absolute terms but leaves less room for costs.

Set your own minimum ratio before you start, and treat it as a screen, not a verdict. A city that passes still needs full underwriting with every cost line and a seasonal model. The rental arbitrage calculator lets you run those numbers once a market makes the shortlist.

Two more questions separate a market that looks good on paper from one that holds up over a full lease.

Is supply growing faster than demand?

Count active listings for your unit type in your target neighborhoods and note the number. Repeat the count a few weeks later, and compare against older data if your research tools show it. A fast-rising listing count with flat demand usually means falling nightly rates. Also look at quality: if most competitors have professional photos, hundreds of reviews and polished amenities, a new unit will need to price lower for longer to break in.

How deep is the low season?

Rent is due in February the same as in July. Look at comp calendars and pricing in the slowest months specifically. A market with a mild dip is easier to carry than one where bookings and rates both collapse for a quarter. If a city has a deep low season, ask whether mid-term stays could fill it, and whether local rules and your lease would allow that switch.

Once you have researched a few markets, put them side by side. Score each factor from 1 (weak) to 3 (strong) and write one line of evidence next to every score. The evidence matters more than the number.

City B has the stronger story, but City A is the better place to sign a 12- or 24-month lease. That is the point of the scorecard: it stops a famous name or a strong summer from outweighing the risks that end leases early.

Treat any rules score of 1 as a veto for short-term use, not just a low number. You can still look at mid-term in that city, but score it as a separate market with its own demand and revenue.

• Shortlist three cities you could realistically operate in, including how you would handle cleaning and maintenance there.
• For each, run the rules filter at state, county and city level, and search recent council agendas for pending changes.
• Write down at least three named demand drivers per city, split into short-term and mid-term.
• Calculate the revenue-to-rent ratio for one unit type using the middle of your comps.
• Count listings and check low-season calendars.
• Fill in the scorecard with one line of evidence per score, then pick one market to source in.

If you want a head start, our market pages summarize what to check in a number of US cities. ArbiBase listings also come with a city, county and HOA rules check already done, but keep your own notes on direction of travel. Rules can change after any check, and you are the one holding the lease.

Pick the market before the unit. Spend a few evenings on rules and their direction, named demand, the rent-to-revenue spread, supply and the low season, then score your shortlist with evidence. When you finally sit down with a landlord, you will be pitching in a city you chose on purpose, not one you talked yourself into.