How to run a hotel displacement analysis (before you say yes to that group)

A group asks for 25 rooms at a discounted rate on a night you expect to run busy. Take it, and you may be selling rooms for $129 that would have sold themselves for $165. Decline it, and you may be turning away the only certain revenue in a soft week. Displacement analysis is the five-minute calculation that answers this with math instead of mood — and it's the single most common case exercise in revenue manager interviews.

The question displacement actually answers

Not "is the group rate lower than my public rate?" — it almost always is, and that alone means nothing. The real question: does the group's total revenue exceed the transient revenue it pushes out? A cheap group on an empty night displaces nothing and is pure gain. A well-priced group on a compressed night can displace so much full-rate business that it destroys money while looking like a win on the booking report.

The four numbers you need

Capacity — sellable rooms that night (out-of-orders excluded).
Unconstrained transient demand — the rooms you honestly believe you would sell WITHOUT the group, based on your pickup history and pace for that date. Not capacity, not hope: your forecast. This number decides the whole analysis, so be honest with it.
The rates — the group's offered rate (net of any commission or rebates) and the transient rate those displaced guests would have paid.
Group extras — meeting room rental, banquet revenue, F&B minimums. Count contribution, not gross: catering revenue carries real costs; room revenue mostly doesn't.

The math, step by step

Displaced rooms per night = transient rooms you could sell without the group, minus what you can still sell with it:

Displaced = min(demand, capacity) − min(demand, capacity − group rooms)

Then compare the whole stay:

Group revenue = group rooms × nights × net group rate, plus group extras
Displaced revenue = displaced rooms × nights × transient rate
Net benefit = group revenue − displaced revenue (subtract the extra variable cost of the additional occupied rooms if you want the precise version)

A worked example

60-room hotel. A group wants 25 rooms for 2 nights at $129, bringing $1,800 in banquet contribution. Your forecast says you'd sell 48 transient rooms each of those nights at about $165.

Step	Calculation	Result
Transient without group	min(48, 60)	48 rooms
Transient with group	min(48, 60 − 25)	35 rooms
Displaced per night	48 − 35	13 rooms
Group revenue	25 × 2 × $129 + $1,800	$8,250
Displaced revenue	13 × 2 × $165	$4,290
Net benefit	$8,250 − $4,290	+$3,960 — accept

Now the number that turns analysis into negotiation: the break-even group rate — displaced revenue minus extras, divided by group room nights: ($4,290 − $1,800) ÷ 50 = $49.80. In this scenario almost any sane rate works. Re-run the same math with demand at 55 rooms and the picture flips fast — which is exactly why you calculate instead of guessing.

The three mistakes that make hotels lose money on groups

Using capacity instead of demand. Plugging in "60" because you have 60 rooms overstates displacement on soft nights (making you decline good groups) and tells you nothing on compressed ones.
Comparing gross rates. A $129 direct group beats a $150 booking that arrives minus 18% commission. Always compare net.
Evaluating the peak night only. A two-night group over one hot night and one dead night is two different analyses — run each night type separately and add them up. Shoulder-night group business over a peak is often the best deal in the building.

Do it now, with your numbers

The free displacement calculator on this site runs the one-night version of this math in your browser — no signup. The full Group Displacement Calculator ($39) adds the multi-night model, variable costs, the quote builder with margin and risk loading, the contract-term checklist (cutoff, attrition, deposits), and a wash-tracking sheet that turns every group you host into better pricing data for the next one. The complete group evaluation SOP — including quote turnaround standards — is part of the RM Playbook.