Lots of good, interesting points in this discussion.
When I started my career (about 30 yrs ago), at a fairly large regional consulting firm, the multiplier was about 2 and they were trying to work it higher. I'd agree that it is about 3 now (probably averages a little higher). All of the overhead costs have risen over the years. The one comment I would disagree with is:
@galss99 said:
The "classic" number is 3.0 (one for the salary, one for overhead, and one for the partners).
I've heard this numerous times over the years as an assumption by people who weren't familiar with the costs of running an engineering firm (obviously this will vary depending on size, niche, etc. of a firm).
When I started my career, the average profit for engineering firms was about 10%. I suspect it has creeped up to over 15% on average - maybe even 20% in a good market (I haven't kept track in recent years as I have eased out of my firm, but during the great recession it took a nose-dive). That is far from "one for the partners".
Consider the
direct costs of having a full-time employee. If you are 100% billable when you are at the office, you still have vacation, holiday, sick, etc. pay, which brings you down to 90-92% billable (92% assuming only 2 weeks vacation, 8 holidays and 2 sick days used). Then if you are 80% billable on the rest (quite high %age), you end up a little over 70% billable overall. Then you have 10.5% social security and medicare (company's contribution), 3% retirement matching and a huge chunk for medical insurance (which varies a lot between companies - many provide subsidies for spouses and dependents)). You still have other benefits and costs to take care of, and that's just the direct costs (and ignoring any bonuses, which have the same taxes and matching as regular pay).
Then you have to pay for the indirect overhead costs - office rent, software licenses, insurance, etc. I'm not trying to argue that there's no money to made by owning an engineering firm. But the owners are typically not pocketing 1/3 of the gross revenue. Or, to put it another way, the owners are not making as much for every hour that you work as you are.