What therapist utilization should a day spa aim for?

How to calculate it

Utilization is hours sold divided by hours scheduled. Hours sold is appointment time inside the provider’s scheduled shift; hours scheduled is the shift itself. Your spa software’s reports may call the same ratio productivity.

Decide once whether breaks count as scheduled time, and apply that the same way at every location. The same ratio computed two ways at two spas is not a comparison.

What the number is telling you

At 85% or more, the hour is effectively full, and you are likely turning some guests away. That is where added hours pay: extend the shift, move a provider out of an hour that sits under 40%, or hire.

Between 40% and 85%, there is room to sell. Fill it before adding staff.

Under 40% for a quarter, the hour is mostly open. Trim the schedule, or market into it if the services that sell in that hour justify the spend.

Where the week fills

A single average hides the shape that matters. At the typical spa we work with, late morning fills best on every day of the week. On Saturday and Sunday the three and four o’clock hours fill as well, and so does three o’clock on Friday. Friday through Sunday run fuller than Monday through Thursday. Even so, the typical spa’s fullest hours still have room before the 85% mark, so for most spas the first job is selling open time, not moving shifts.

The least full hours sit midweek, above all the nine o’clock and six o’clock hours from Monday to Thursday, and Tuesday from one to five. The last hour runs low partly because a longer service can’t start just before close; the first has no such excuse. Judge both over a quarter, against what that hour of payroll costs.

Check your own rate for each of those hours before acting: under 40% is a trim-or-market hour; 40% to 85% is room to sell.

Where to put provider hours

Compare each day’s share of the scheduled week with its share of the hours that sold. For example, if Saturday holds 15% of your scheduled hours but 18% of your sold hours, Saturday sells more than its share of the schedule.

At most spas we work with, Monday through Thursday carry a little more of the schedule than of the sold hours, and Friday through Sunday a little more of the sold hours than of the schedule. The gaps are small.

That alone is not a reason to move anyone. If your Friday and Saturday peaks hold at 85% or more while a midweek block sits under 40%, move that block to the weekend: it puts hours where guests are being turned away. If the weekend still has open time, fill it first; moving hours there only spreads the same bookings thinner.

Do this with your own numbers

Pull a quarter of utilization by day and hour from your spa software’s productivity or scheduled-hours-sold report, and the same weeks last year if you have them, so a seasonal dip does not read as a lasting one.

Mark every hour that holds at 85% or more, and every hour under 40%.

Move a shift or block only out of the under-40% list and only into hours at 85% or more. If nothing reaches 85%, move no one: trim the under-40% hours or market into them.

Market into everything in between before you change the schedule, then check again next quarter.

Why there is no national number

The US spa industry’s headline statistics, from the International Spa Association, cover revenue, visits, locations, revenue per visit and employment. Utilization is not among them.

The targets you will see quoted are almost always whole-week averages, and a whole-week average hides the hours that matter. The shape in the charts above, from the US spas we work with, and your own spa against the same weeks last year will tell you more.