"Freelance work" is an extremely broad term, so it's hard to answer. Taxes are 100%-country dependent, so you'll need to research it on country-per-country basis. For example, in Poland I pay 9% on everything up to ~$28k, then 14% on the next $17k and 25% on everything above that. For that, I receive the free (state-provided) health care. On the other hand, I imagine that countries such as Germany or especially France would take much more of your pay.
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"Freelance work" is an extremely broad term, so it's hard to answer. Taxes are 100%-country dependent, so you'll need to research it on country-per-country basis. For example, in Poland I pay 9% on everything up to ~$28k, then 14% on the next $17k and 25% on everything above that. For that, I receive the free (state-provided) health care. On the other hand, I imagine that countries such as Germany or especially France would take much more of your pay.