Sorry, I meant 30% haircut, so yeah, 70% of total US salary. Granted that's totally rough but you can confirm it on glassdoor. People will give you CoL arguments but they're BS -- London is just as expensive as NYC, if not more. A big part of the problem is that HMRC costs increase so rapidly above £120k. It seems like the UK government is hampering the willingness of US companies to raise salaries past that level. It's typical UK government behavior, honestly.