Fair Share Calculator — Hotel Room Supply Market Share

About the Fair Share Calculator — Hotel Room Supply Market Share

Fair share is the simplest yet most fundamental competitive metric in hotel revenue management. It represents the proportion of total market rooms that your hotel contributes. If your hotel has 200 rooms in a competitive set totaling 1,000 rooms, your fair share is 20%. In theory, you should capture 20% of all room nights sold in the market.

When you capture more than your fair share, you're winning — taking demand away from competitors. When you capture less, competitors are winning. The MPI (Market Penetration Index) directly measures this by dividing your actual market share by your fair share.

This calculator computes your fair share percentage and translates it into expected room nights based on market demand. Knowing your fair share is the baseline for all competitive performance analysis and helps set realistic revenue targets.

When This Page Helps

Fair share sets the performance baseline. Without knowing your expected share, you can't evaluate whether your hotel is over- or underperforming. Use this calculator to establish the benchmark against which MPI, ARI, and RGI become meaningful.

How to Use the Inputs

1. Enter the number of rooms in your hotel.
2. Enter the total rooms in the competitive set (including your hotel).
3. Optionally enter the market occupancy to see expected room nights.
4. Enter the number of days in the analysis period.
5. Review your fair share percentage and expected demand.
6. Compare actual bookings against the fair share expectation.

Example Calculation

Tips & Best Practices

• Fair share changes only when supply changes — new hotels or closures shift everyone's share.
• Your goal is to capture more than your fair share consistently.
• A large hotel in a small comp set has a high fair share and must capture lots of volume.
• A small boutique in a market of large hotels has a low fair share but can still outperform by rate.
• Update your fair share calculation whenever a new property enters or exits the competitive set.
• Use fair share as the denominator when calculating actual market share to get MPI.

Fair Share as a Performance Baseline

Fair share creates a neutral starting point for competitive analysis. If every hotel in the market performed identically, each would capture exactly its fair share. Deviations from fair share reveal competitive advantages and disadvantages that drive strategic decisions.

Impact of New Supply on Fair Share

New hotel openings are the most significant fair share disruptor. When a 300-room hotel opens in a 1,500-room market, total supply jumps to 1,800 rooms, and every existing hotel's fair share decreases by about 17%. Revenue managers must anticipate these shifts and adjust forecasts accordingly.

Fair Share by Segment

While overall fair share is room-based, some revenue managers calculate segment-level fair share. A hotel with strong meeting facilities may have a higher fair share of group demand than transient demand. Segmented fair share analysis helps target the segments where the hotel has the strongest competitive position.

Frequently Asked Questions

• What is fair share in hotel terms?

  Fair share is the percentage of total competitive set rooms that belong to your hotel. If your hotel is 15% of the market's room supply, your fair share of demand is 15%.

• Does fair share account for hotel quality?

  No. Fair share is purely a supply-based calculation. A luxury hotel and a budget hotel with the same number of rooms have the same fair share. Quality differences are captured by ARI and the rate at which you exceed or fall below fair share.

• How does new supply affect fair share?

  When a new hotel opens, total market rooms increase and every existing hotel's fair share decreases. A 200-room hotel in a 1,000-room market has a 20% fair share, but if a 200-room hotel opens, fair share drops to 16.7%.

• Is fair share the same as market share?

  No. Fair share is what you should capture based on supply. Actual market share is what you do capture based on bookings. MPI = actual market share ÷ fair share × 100.

• Should I include my own hotel in total market rooms?

  Yes. Total market rooms includes your hotel plus all competitive set hotels. Your fair share is your hotel's proportion of this total.

• How many hotels should be in a comp set?

  STR recommends 5-7 hotels as a competitive set. Including too many dilutes the analysis; too few may not represent the competitive landscape accurately.