Depending on the country you go to and its particular tax treaty with your home country, the fact that you are traveling AND working (I'm not capitalizing 'and' to be an asshole, rather I'm capitalizing it because I don't want to mislead people into thinking that being a tourist can fuck up their taxes) affects just about everything. Depending on the country, the type of income, and my authorization to be in that country, the funds earned when I am physically in another country could be taxable in my home country, in their country, in both countries, or (very rarely) in neither.

That may be true. (I'm not an accountant.) But, in years of travel to dozens of countries I have never remotely been aware of or filed taxes to a foreign country because I attended a conference or worked remotely for a few days. And that's included when I've had an explicit business visa in some countries.

Then, there is a very high chance that you have broken some tax laws.

Well, I suspect that pretty much everyone who travels does then. I can guarantee that no corporate executive who travels to dozens of countries a year is filing tax returns in those countries.

That executive wasn't entering those countries on a tourist visa, but neatly submitted that they are travelling for business purposes and have the appropriate business visa.

There is a limited range of activities permitted on those, including attending meetings and conferences.

Or they entered on the country on the US Visa Waiver Program or similar programs in other countries, which is surely the most common way to travel between first world countries (apart from inter-EU travel, which is more permissive again) and allows you to travel either for tourism or for business.

Yes, I would assume those executives get business visas where required, just as I do. In addition to meetings and conferences, those visas at least implicitly allow for continuing to do whatever is required for their "day job" back home.

But mostly, US and EU citizens in particular have visa waivers or, at most, a visa on arrival that lets them do normal business travel things. They just can't take a local job.

To the upthread comment, neither myself nor anyone I know has ever been aware of any particular tax implications associated with ordinary business travel.

Can you give an example of the "neither" case?

> The fact that I'm traveling somewhere (on business or pleasure) during a given month basically doesn't affect anything. I travel maybe 100 days a year, in part outside the US.

It can affect your taxes dramatically. Bump that up to 335 days / year outside the US, and you're entitled to the foreign earned income deduction, which last I checked was about $120,000.

That's not evading, though; it's a formal deduction.