Most people expect a clean country-by-country split. In practice, the same handful of brokers operate in both markets — the real differences are in regulation, tax treatment, and product emphasis, not a hard line between "German" and "Dutch" brokers.
Regulator
Brokers based in Germany are typically supervised by BaFin; brokers based in the Netherlands by the AFM (conduct) and DNB (prudential). Many brokers active in both markets are actually licensed in a third EU country and passport their license in — worth checking per broker rather than assuming by country.
Fees
Fee structures don't split cleanly by country — the same neobrokers (Trade Republic, Scalable Capital, DEGIRO, and others) operate across both markets with largely the same pricing. Differences tend to come from account type and product, not the country you're based in.
Product range & exchanges
German-market brokers tend to emphasize German exchanges (Xetra, Frankfurt) and savings-plan (Sparplan) products; Dutch-market brokers historically emphasize Euronext Amsterdam access — but most major brokers now offer both, so this gap has narrowed a lot.
Tax reporting
This is where the real difference is: Germany taxes realized capital gains (Abgeltungssteuer), while the Netherlands taxes assumed investment income under box 3 (wealth tax) regardless of what you actually earned. Your broker's tax documents reflect whichever system applies to you as a resident — it's about your tax residency, not the broker's home country.
