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How to return 4 - 6% on savings / investments with little / no management?
I'm assuming you mean 4-6% annually over 10-15 years.  If you mean 4%-6% total return over 10 years then this question is easy just find your local country's 10Y bond and that should likely cover it (though barely if you are German). So 4%-6% annually is not a big stretch but it does require some risk and at least a bit of work.  A fire-and-forget good mix would include (using index mutual funds or etfs) Some internet research and a one-time meeting with a financial adviser who is paid by you (not paid on commission) should help you set the right balance of these index funds and be a good check on what I'm advising. If you are willing to do a tiny bit more work it's well worth starting with a heavier weight on the riskier stocks and ex-European funds (more currency risk) and then every 2-3 years slowly move into safer stocks and Euro-based funds.  With that tiny amount of extra work there you can make it much more likely that you will end within your 4-6% range while taking significantly less risk overall.