That’s the trick. Don’t live anywhere. Every other country taxes based on residency rather than citizenship. If you’re not a U.S. citizen you can just wander around the world living tax free regardless of your income. Don’t stay anywhere long enough to become a tax resident.
Sorry but that's been a meme and a house of cards since the Common Reporting Standard.
The fact is that the country whereever you carry any legal activity will require you to prove you're taxed elsewhere not to tax you in place.
To carry out economic activity you'll need a presence, if it's a company it's corporate tax, if you're freelance you'll need a registered address.
Most banks will freeze you without a TIN and and address.
Plus the whole can of worms of the centre of vital interests or source-based taxation systems.
In the moment you input an address in the financial system, the tax administration will know, and they will knock your door for any significant income, plus arrears, pulling one of the cards from your house, and it's not going to be pretty.
Picking a random country: Italy. Please explain under what legislation or mechanism an Italian citizen who spends 3 months in Japan, 3 months in South Korea, 3 months in the U.S., 3 months in Norway and then repeats the loop for the rest of their life would owe any taxes to any tax authority?
Almost every country except the United States only taxes their residents, not citizens. Almost every country follows the typical 180 day rule for tax residency.
Funny pick, because Italy is very strict on this. To stop being considered a tax resident in Italy you need to deregister from your municipality and register in the AIRE (Anagrafe degli Italiani Residenti all'Estero). But for the AIRE to accept your application on the Italian consulate in any of those countries you need to provide proof of permanent residence (address, work contract, company ownership, etc). If you don't do that, you're still considered resident of Italy for tax purposes, if you do it, congrats you're tax resident elsewhere. Registering in the AIRE is mandatory if you move, btw.
If you add the legislative decree 209/2023 article 1 that modifies the tax code and sets the basis for the centre of vital interests, it complicates things even further for the "permanent traveler" for simply having a family or ever having been long term resident in a country.
Let's pretend my random country generator didn't pick the worst possible example. I should have chosen a country I am familiar with. Let's take Germany. A German tax resident can de-register at any time, so long as they are leaving the country, without first establishing tax residency elsewhere.
In Germany, unregistering doesn't require registration elsewhere, but it doesn't mean you stop being tax resident.
If you regularly return to Germany and generally to the same place there (i.e. family, friends), and you're not tax resident elsewhere, the tax administration will consider it your habitual abode. And, you guessed it, under the German Fiscal Code (Abgabenordnung), you are a tax resident if you have a domicile or habitual abode in Germany.
Plus, under Extended Limited Tax Liability (Erweiterte beschränkte Steuerpflicht), any significant economic presence in Germany (assets, German clients, participation in a company, bank accounts) will pull you into the tax jurisdiciton for 10 years, not only as permanent traveler but also if you move to a low-tax country.
So while different, it's similarly difficult. It's technically possible but you have to leave Germany and basically cut all ties, difficult if you're German.
If you're not German, you can completely escape the claws of the German fisc with relative ease. But if you're say Spanish, Hacienda will consider you tax resident in Spain even if you never ever lived in Spain (i.e. born abroad). There's all sort of sticky tax rules in numerous countries: you're tax resident until you prove you're tax resident elsewhere, the aforementioned nationality fallback, essential ties rules, the "domicile" concept (i.e. where you intend to live until you die).
Plus, and I reiterate, the difficulty in obtaining a simple bank account without a TIN and proof of address in most countries.
I'm sure there are corner cases with exotic nationalities and carefully selected tax jurisdictions with lax "tax residency" tests to rotate along, and numerous nomads fly under the radar for various reasons (illegally of course), but I assure you it's way more complicated than "lol just don't be American/Eritrean and travel all the time", plus tax laws constantly change, and not to leave you more loopholes.