eHMS Press · public hotel-finance tool
Calculate how a hotel or department converted a revenue movement into operating profit, then interpret the result according to the direction of Revenue and GOP or Departmental Profit.
Practical interpretation guide
Read the focused eHMS guide for the formulas, the reconciled Azure City example, downside cases and the situations where revenue and profit move in opposite directions.
How it works
Flow Through % = Change in Profit ÷ Change in Revenue × 100
If Revenue and Profit both rise, the percentage describes upside conversion. If Revenue rises while Profit falls, the negative ratio flags that growth did not reach profit and requires diagnosis.
Downside erosion % = Change in Profit ÷ Change in Revenue × 100
When Revenue and Profit both fall, the result shows how much of the revenue loss reached lost profit. The calculator also shows Flex / profit protection = 100% − downside erosion.
The calculator keeps the existing Flow Through / Flex research convention for anonymous benchmark contribution, while the management result now separates downside erosion from Flex/profit protection so contradictory directions are not misread as a score.
Direction matrix
Measure upside conversion. Then test whether the result makes sense for the revenue source, mix and cost behaviour.
Measure downside erosion and profit protection. Check whether the protection came from healthy flexing or deferred/temporary cost movements.
Profit improved despite lower revenue. The negative directional ratio is not a bad grade; investigate mix, productivity, one-offs and deferred spend.
Growth did not reach profit. Review acquisition cost, department contribution, labour thresholds, support costs and unusual items.
Period discipline
A strong default management view. It compares cumulative performance over the same operating period and reduces the impact of isolated events or accounting timing.
Useful for an active operating trend. It reacts faster than YTD while smoothing a single unusual month.
Better for judging whether conversion performance is sustained across a broader demand and cost cycle.
Useful for tactical diagnosis, but more exposed to events, payroll timing, repairs, group mix and seasonality. Confirm it against a longer trend.
Continue with the source books
The calculator is connected to the eHMS chapters that explain flow-through protection, cost behaviour and the forecast/action handoff.
eHMS benchmark research
After calculating your result, you can voluntarily contribute the ratio and anonymous hotel classifications. The research dataset does not require your hotel name or the underlying revenue and profit figures.
Frequently asked questions
Flow Through measures how much of a change in revenue reaches a change in profit. When revenue rises, the usual Flow Through percentage is change in GOP or departmental profit divided by change in revenue. The percentage is a conversion signal, not a diagnosis or universal grade.
Flow Through % = change in GOP or departmental profit divided by change in revenue, multiplied by 100. Use comparable reporting periods and the same reporting basis on both sides of the calculation.
When revenue falls, the calculator shows downside erosion: the share of the revenue decline that reached lost profit. It also shows Flex or profit protection as a secondary measure: 100% minus downside erosion. This makes it clear how much of the lost revenue was prevented from becoming lost profit.
The directional conversion ratio becomes negative even though GOP improved. That negative sign is not a bad performance grade. Investigate whether the improvement came from healthier mix, lower acquisition cost, genuine productivity, non-recurring movements or deferred expenditure.
The calculator reports a negative directional ratio and flags that growth did not reach profit. Review revenue mix, distribution cost, departmental contribution, labour thresholds, support costs and one-off movements before assigning a cause.
No universal percentage fits every hotel, department or revenue source. The calculator may show contextual eHMS reference ranges for positive revenue-and-profit cases, but they are not universal industry norms or STR competitive-set percentiles. Property history, revenue mix and cost behaviour remain essential.
Year-to-date, rolling three-to-six-month and full-year periods are generally more useful for structural analysis because they reduce timing and seasonal noise. A single month can still help tactical diagnosis, but should be confirmed over a longer period.