I am saying that. Salary + taxes + insurance + retirement + other benefits + support cost is around 670k. Salary eats up like 160k of that budget, though.

Please provide a breakdown.

I find this 4X of base salary implausibly high. 2X strikes me as closer to my reality at a large academic medical center.

I don't have a breakdown. It was a number cited to me from a manager. Downvotes are interesting.

Payroll taxes on $160k salary are $12,240. Employer contribution to health insurance is maybe $6k - $20k. Retirement maybe $5k. Still under $200k.

Heck of a lot of "support cost" to get to $670k

Your numbers make sense from what I've seen in private sector. And meet the common sense threshold as well.

Whether the numbers are either wrong or if that is truly what support costs look like at a university would be interesting to know.