What is the difference between an ETF savings plan and pension insurance?

Both products can build wealth for retirement, but they work along quite different logics.

An ETF savings plan in a brokerage account gives you direct ownership of fund shares. You can pause, change, sell or transfer them whenever you like. Costs are typically a small monthly platform fee plus the fund's ongoing cost. Tax treatment follows the German Investmentsteuergesetz: capital gains and dividends are taxed at the flat capital-income rate of 25% plus Solidaritätszuschlag (and church tax if applicable), which works out to around 26.375% in total for most savers without church tax. Equity funds benefit from a 30% partial exemption (Teilfreistellung) on gains and dividends, and you can use your annual Sparerpauschbetrag (currently €1,000 per person) to keep the first slice of capital income tax-free. Your German broker handles all of this automatically.

Pension insurance is essentially the same kind of investment held inside an insurance wrapper. Modern fund-linked pension contracts can hold ETFs internally too, so the underlying investments often look familiar. The potential advantage is the tax treatment of payouts: if the contract is held for at least 12 years and payout starts after age 62, only half of the gains are taxed at your personal income tax rate (Halbeinkünfteverfahren) — which can be meaningful if you're on a high income at retirement. The trade-off is contract costs that erode part of the long-term return, and the lock-in needed to qualify.

For most expats, the ETF savings plan is the flexible base layer; pension insurance is an optional addition once you're confident you'll actually meet the minimum holding period.