https://www.livinginportugal.com/en/moving-to-portugal/tax-r...
Portugal has followed the "Nordics" model when it comes to taxes; income is taxed higher but services (healthcare, schools, roads and other infrastructure] is much better than in the US [or most of the rest of the world for that matter!].
The much cheaper lifestyle in Portugal more than makes up for the higher taxes.
I'm not a "tax adviser" and HN is not the place for that "tax efficiency" advice. But you should consider setting up a Ltd Company and paying yourself/co-founders [Tax Free] dividends.
I would [highly] recommend watching "Startup Legal Mechanics" [YCombinator Startup School]: https://youtu.be/BTShgZxiNV8
tldr; start a company [separate legal entity].
I'm not a tax expert but I don't think you can do it. Dividends are not tax free. You have to pay 28%(IRS) + ~20% (IRC) so in the end you pay more than a regular freelancer (for salaries below €80K).
edit: except if you are a non-habitual resident..
So maybe if you set up your company in another tax friendly country, you would be able to pay your corporate tax and taxes on your dividends there.
[1]: http://www.newco.pro/blog/en/portugal-or-spain-two-tax-regim...
This is not about paying taxes, it's when those taxes are essentially wasted by the giant administrative leeches that runs countries like Portugal.
Long story short: run for the hills, don't come to Belgium.
>Long story short: it's one of the best countries in the world to live in, by almost any metric.
Yeah, I'd take that deal.