Not exactly, only the "living expenses" part of the salary can get this "equivalence multiple" applied. The rest of the salary should be counted 1:1 with the US because other purchases cost the same regardless of where you are (branded clothes, travelling, buying a laptop, buying a car, investing for retirement, stocks cost the same everywhere). So it's more like the first 20k are like getting paid 100k and the rest of the 80k will just be 80k, so more or less 200k equivalent.
It's very hard purely on cost of living to match a salary of 500k anywhere in the world, because at some point the extra items / investments all cost the same regardless of geography.
But you will probably stay there for life so you have the benefit for life. "investing for retirement, stocks" are cheaper as you also need 3 to 5 times less.
With 100K in Prague you can retire/never needing to work for money after 3 to 10 years Depending on your habits. Not sure how many Bay Area employees can do that staying there.
I am somewhere close and earn 300K which is about 30 times of what you need per year. One year of works covers all my expenses living like a local for the rest of my life in capital returns even at a modest 3.5% SWR.
I take that over 500K Job (of which over 30% goes to US Gov, while i pay max 10%) any time, heck I take it over a 1000K Job in SF/NY etc.
It's good to look at the whole picture like that. A lot of "cost of living calculators" tend to implicitly assume you're spending every take-home dollar on eggs or gasoline, which isn't true for highly-paid software engineers.
I'd propose that you should also calculate how many years of 300k in the Bay Area it'd take to retire in Prague vs years making 100k in Prague.
I ran these numbers a couple years ago, and it was costing me about ~$8000/month to live in the Bay Area. I estimated we could live in Tokyo or much of the USA at a similar quality of life for $4000/month. With $310k/year (taking home $190k) that meant I was able to save about $90k a year. In Tokyo, I could only get companies to offer about $140k at the time, and it was about the same for remote work in the USA. That meant I could save about $50k/year.
You can make a strong argument that saving $50k and living in one location is better than saving $90k in another, but it's good to have all the data at hand to make the best decision for yourself.
> But you will probably stay there for life so you have the benefit for life.
Hard to know this 30 years ahead of time. Maybe after 30 years in the Bay Area you retire to Hawaii? Or lower COL like Portland? Or even a town in Japan? You have tons of choice if you’ve been saving at 500k. If you’ve been saving at Eastern Europe salaries, your options narrow
Traveling is cheaper in EU simply because more interesting stuff is very close, flights are crazy cheap (usually you can find flights under 100 USD both-ways inside EU), and you can do it a lot while being paid (20-30 days of paid vacations per year in most countries).
Retirement/healthcare and education is paid by taxes already in most countries so there's less things to save for. Also cars are optional and distances are smaller.
I agree about the rest (but I wouldn't want to live in US anyway, no amount of money can buy you a walkable city or safety for your kids).
Not quite; an iPhone costs more in Prague, a Tesla much more, a laptop can be double the price. You don't purchase lots of iPhones, but the global goods generally have higher prices in Europe than EU, partly due to VAT, partly due to market conditions. Energy and gas are much more expensive in Prague.
Not really most contractors I know are just regular programmers, average in skill. Their rate is around 800eu/day, they all work in big bureaucratic enterprises. Hiring contractors is basically the only way a lot of those companies can get access to somewhat decent talent.
And it is not as expensive as it seems. If you live in a country with strong social safety nets hiring someone is crazy expensive.
The few contractors I know that work normal software jobs have lower rates, but they still make good money.
I don't know where you live, but 800 euro/day is not a standard rate for avg programmers in many parts of Europe. Is most probably half or sometimes less than that.
In the UK the rate is between 400 and 600 (450/650 euro) and is one of the market that pays the most in Europe. Many other countries are offer half that amount for a "react" guy