Law / Do some teaching business in Poland, Can invoice customers from UK business? [11]

In theory, it's possible. But there are several dangers.

1. The companies will simply not agree to such an arrangement.
2. If the Polish Urzad Skarbowy catches you, you'll be in a world of pain.
3. The UK might not be happy about such an arrangement, particularly if your banking arrangements are...interesting.
4. It imposes additional accounting requirements on companies. The EU still isn't a unified market for services, and as Jon357 says, companies do err on the side of caution.

5. Why are you trying to avoid paying Polish tax?

Law / Do some teaching business in Poland, Can invoice customers from UK business? [11]


Yes. That's because ZUS is providing you with a pension from the money you put in, rather than stealing it via generation taxation.


You are evading not only social insurance taxation, but also income taxation. As I'm sure you are aware, income tax thresholds are significantly lower in Poland. Standard fine is 200% of what you evaded.


Avoiding ZUS is not legal.

USA, Canada / Question regarding a B2 Visa for my Polish Girlfriend to visit USA [7]

What kind of work contract does she have?