Sesion / Blog / RMS vs a Spreadsheet: When the Spreadsheet Stops Working

RMS vs a Spreadsheet: When the Spreadsheet Stops Working

2026-08-294 min readBy the Sesion advisory team

Quick answer

A spreadsheet works for revenue management while one person can maintain it and the data fits in their head. It stops working when the consolidation takes longer than the analysis, when nobody but its author can use it, or when you need market signals it cannot read. The switch is usually triggered by complexity across segments and room types, not by hotel size.

TL;DR

  • A spreadsheet is legitimate revenue management, not a failure to buy software
  • The limits are maintenance time, single person dependency and the absence of market data
  • A system adds coverage across every date, market signals and an audit trail of decisions
  • Key person risk is the most underrated reason hotels switch
  • Model the RMS cost against the RevPAR lift it needs to break even before deciding

What the spreadsheet does well

It encodes the knowledge of the person who built it, which is usually the person who knows the property best. It is transparent, every formula can be inspected, and it costs nothing beyond the time spent maintaining it. Plenty of profitable independents run this way for years.

It also adapts instantly. A new segment, an odd contract, a one off event: all of it can be added in an afternoon without a vendor conversation. That flexibility is genuinely hard to buy.

The three signals it has stopped working

First, the consolidation takes longer than the thinking. When Monday morning is spent exporting and pasting rather than deciding, the sheet has become the job. Second, only one person can use it. If that person is on holiday and rates freeze, you have a key person dependency wearing the costume of a tool.

Third, you need signals the sheet cannot reach: competitor rates, market pace, demand indicators from outside your own history. A spreadsheet can hold anything you type into it, and typing market data daily is not sustainable.

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What a system adds

Coverage is the first thing. A revenue management system reprices every date in the horizon daily, which no manual process matches. The second is market context pulled automatically rather than assembled by hand.

The third is an audit trail. A system records what it recommended and why, which turns revenue conversations from opinion into review. That matters most when there is an owner or an asset manager asking why a weekend was priced the way it was.

Do the break even honestly

Take the annual cost of the system and divide it by your rooms and your open nights to get the ADR multiplied by occupancy rate. It is the standard headline metric for comparing hotel">RevPAR lift needed just to break even. Then ask whether that lift is plausible given your occupancy shape. For a property already running near capacity in season, the room to improve is narrower than a vendor will suggest.

Also count the time the spreadsheet consumes, valued honestly. Several hours a week of a senior person is a real cost that never appears in any comparison, and it is often the number that settles the decision.

Common questions

Is a spreadsheet unprofessional for revenue management?

No. A well structured sheet with clean pickup data and a consistent process outperforms an unused system every time. The problem is never the tool, it is when maintenance cost and key person risk grow past the value it delivers.

Can I keep the spreadsheet after buying a system?

Many revenue managers do, using it for scenario work and for the analyses the system does not cover. What should stop is using both as sources of truth for published rates, because that is how two different prices end up live.

What data quality do I need before an RMS is worth it?

At minimum, consistent room type definitions, reliable segment tagging and cancellations recorded properly. If your history has renamed room types or segments applied inconsistently, clean that first. The system will otherwise learn from a distorted picture.

Does hotel size decide this?

Less than variability does. A small property with strong seasonality, several segments and volatile demand gets more from a system than a larger one with flat occupancy. Look at how much your rates should change across a year, not at your room count.

What should the spreadsheet contain at minimum?

Pickup by date against the same point last year, occupancy and rate by segment, and a note of the events and decisions behind unusual dates. That last column is what turns a sheet into a record you can learn from rather than a snapshot.

How do I hand over a revenue spreadsheet?

Document the source of every import and the meaning of every column, then have someone else run it for a full week while the author watches. If that is not possible, the key person risk is real and it is an argument for a system.