How do I invest properly as an expat in Germany?

Investing in Germany is genuinely straightforward once a few principles are in place. The base layer is an emergency fund — typically three to six months of essential expenses in an instant-access account. That stops you from being forced to sell investments at a bad moment when something unexpected happens.

Above that, a long-term ETF portfolio in a German brokerage account is the workhorse for most expats. It's globally diversified, low cost, and — importantly — fully automated on the German tax side. A monthly savings plan (Sparplan) into one or two broad ETFs is usually all you need: for example, a global equity ETF, optionally combined with a bond or money-market component if your time horizon is shorter or you want a smoother ride.

The reason to use a German broker rather than a foreign one is mostly practical, not legal. All the tax-relevant details — Sparerpauschbetrag, Vorabpauschale, Freistellungsauftrag — are handled automatically by German brokers and reported correctly. Investments through foreign brokers aren't illegal, but they create extra reporting work each year, and occasionally nasty surprises around fund classification (for example, US-domiciled ETFs that aren't approved for retail purchase in the EU).

The advice that actually works for most expats is unglamorous: keep the structure simple, the costs low, the time horizon long, and automate the contributions so you don't have to think about timing the market. The hard part is staying consistent for ten years, not picking the cleverest fund.