Seems like this has come up before, but I did a quck search and didn’t find a thread. Of coarse it depends on your location. You mention that your rate is $150/hour - where are you based? It also depends on the task.
We’re based in Los Angeles and Ventura Counties. This area can probably handle some of the highest rates (New York I believe is at the top of the scale).
Our rates range from $75 - $200 per hour. Depending on the task. The other variation I have seen is how companies handle tracking billable hours. Just because we could charge $150/hour doesn’t mean we’ll get 8 hours @ $150 per day. So calculating where that number needs to be is an important excercise and will vary depending on your specific practices.
If getting $150/hour is becoming more difficult could you change things so that the perceived value is better but your bottom line is not affected? Perhaps implement a trip charge. Or a fuel charge. Re-evaluate handling design fees. Increase technicians efficiency so they increase their % billable time. That way a reduction in hourly will be balanced with an increase in # of billable hours.
Many of the business management classes through Cedia focus on the importance of metrics. If you aren’t tracking it - you can’t manage it.
Now let me remind myself to take some of that sound advise.