What Is a Hotel’s Fair Market Share and Why Does It Define Your Competitive Position?

If you own or invest in a hotel, you’ve probably seen the term “hotel fair market share” in your STR report and skimmed past it on the way to RevPAR. That’s a mistake. Fair market share is one of the few numbers in hotel performance reporting that tells you, plainly, whether your property is winning or losing against the exact hotels you compete with every night.

This is meant as a primer, the kind of foundational tool I wish more new owners and investors understood before they dig into anything more complex.

Hotel Fair Market Share, Defined

Every hotel in a competitive set (comp set) has a “fair share” of the market’s total room revenue and room nights. If your hotel has 100 rooms and your competitive set, including your own hotel, has 1,000 rooms in total, your fair market share is 10 percent. That’s it.

Your actual market share is what you actually captured: the percentage of the comp set’s total revenue or demand that landed at your property. The relationship between fair share and actual share is where the story lives.

RevPAR Index, Defined

RevPAR index is the shorthand version of the same idea. It’s calculated as:

Your RevPAR ÷ Comp Set Average RevPAR × 100

An index of 100 means you’re performing exactly at your fair share: your hotel is capturing precisely the revenue per available room that its size and market position would predict. Above 100 means you’re outperforming your fair share. Below 100 means you’re underperforming it, regardless of whether your absolute RevPAR is up or down year-over-year.

This distinction matters more than people give it credit for. A hotel can post RevPAR growth and still lose ground if the whole market grows faster. Index tells you whether you grew relative to the field you’re competing against.

Building a Comp Set: San Diego as the Example

Take a 150-room upscale hotel in San Diego’s Mission Valley submarket. A properly built comp set for this hotel isn’t “hotels in San Diego.” It’s a short list, usually four to eight properties, chosen because they compete for the same guest on the same night: similar chain scale, similar room count, similar rate positioning, and in most cases proximity, since a guest choosing between hotels is choosing among what’s realistically bookable in that submarket.

For that Mission Valley hotel, the comp set might include a few branded upscale properties along the I-8 corridor and near Fashion Valley, deliberately excluding the downtown Gaslamp or Coronado luxury resorts, even though they’re technically “in the San Diego market area.” Those properties don’t compete for the same traveler, the same rate tier, or the same demand generators: convention business downtown pulls very differently than leisure and drive-in business in Mission Valley.

Over-Indexing vs. Under-Indexing: What It Actually Signals

Over-indexing, a RevPAR index above 100, means you’re outperforming your fair share. That’s generally good news, but it’s worth asking why. Is it rate-driven, commanding a premium the comp set can’t match, or occupancy-driven, winning volume, possibly by discounting? Hotels that over-index on occupancy but under-index on ADR often win share by leaving rate on the table.

Under-indexing, a RevPAR index below 100, means your comp set is outperforming you relative to size. This is where it gets diagnostic. Under-indexing on ADR but roughly in line on occupancy often points to a pricing or positioning problem. Your rate strategy isn’t capturing what the market will bear, which ties directly into your broader hotel revenue management strategy. Under-indexing on occupancy but competitive on ADR often points to a distribution, sales, or operational visibility issue; guests who’d pay your rate aren’t finding or choosing you.

Under-indexing across the board, especially if it’s a trend rather than a single soft month, is one of the earliest and most reliable signals of a hotel performance problem worth investigating before it shows up in NOI in a way that’s harder to reverse.

Why This Should Be Foundational Knowledge, Not an Afterthought

For newer owners and investors, hotel fair market share and RevPAR index are often the first real diagnostic tools available before deeper financial analysis is even possible, and they only require an STR report, which most hotels already receive monthly. Understanding them well is the difference between reading your STR report and using it.

If you’re building out your market intelligence approach and want this kind of analysis applied to your own comp set, that’s a conversation worth having, no pitch required, just a look at your numbers. And if you’d rather absorb this kind of thing steadily, our newsletter covers these fundamentals as they come up in real portfolios, not just in theory.