[rahimnathwani]

"This way, you have no residence in Germany at all, and also you're there for less than 183 days per year, so they really have no claim to your taxes."

Be careful with this. I don't know about Germany in particular, but in many countries tax residency isn't as simple as whether you were present for >=183 days.

Take the UK as an example. The relevant legislation (Finance Act 2013) defines a 'Statutory Residence Test'. It's complicated enough that HMRC (UK equivalent of IRS) created a booklet to help you understand how it applies in your own situation.

That booklet is 105 pages long: https://www.gov.uk/government/publications/rdr3-statutory-re...

Even if you spend only 3 days/week in the UK, it's possible to become tax resident there, and is more likely if you do it for 2 years in a row.

[badpun]

Thanks. The possibility of being „caught” is quite low in this scenario I think, as HMRC has little chance of even finding out about your existence - you don’t have an UK address or a bank account. You ARE frequently crossing the border, but I don’t know if they have access to this information.