[esotericn]

Employer's NI is 13.8%, so multiply a normal 'pre-tax' salary by 1.16. Then again, the Americans are presumably getting health insurance so it'd be a wash.

I have a sense that Americans are just better at negotiating (taught to do it, and actually do it) than Brits. Anecdotally I know a whole bunch of people who could be earning a lot more (not only in software), but they have this sort of meekness that leads them to believe whatever number the other party says is what they have to take.

Individually that may not make up all of the difference, but collectively it probably does (e.g. the market depressing effect if most people don't bother).

[CalRobert]

Honestly it hurts to say but the prevalence of tall-poppy syndrome, deference to your boss, etc. is horrific for salaries in at least Ireland, and maybe Europe as a whole. When I left my last job we found out I was paid quite a bit better than my colleagues (who were just as good) and all I had done was... push a tiny bit. They hadn't.

Other things like "always be interviewing even if you like your job" and stuff like that get the odd look of disapproval, even though it's pretty obvious you will do your best negotiations when you have the strongest position, which means already having a job you like.

[foldr]

>so multiply a normal 'pre-tax' salary by 1.16

I don't follow the logic of this. The amount of your quoted salary that you get to keep (for a typical SE salary) is going to be somewhat higher in the US than in the UK. (Not massively higher - Americans often inaccurately apply the stereotype of high tax Europe to the UK.) Whether the deductions are for employee or employer taxes is moot from a financial point of view.

[esotericn]

If someone says "I earn 50K" in the UK then they mean that's their salary after employer NI but before income tax and employee NI. The cost to the employer (in straight cash terms, not including related stuff like a desk, computer, etc etc) is more than that figure.

It's not fully pre-tax, but we call it pre-tax, just pointing that out.

[foldr]

Ok, but that doesn't seem to have anything to do with US/UK pay disparities. US pay also doesn't include all the taxes and other expenses being paid by the employer in relation the the employee. E.g., the employer's portion of the health insurance premiums won't be included.