Owning shares in the company you work for can be a major incentive to employees looking to join a startup. If all goes well, even a <1% equity stake can end up being worth some serious cash. But, when it comes to selling shares, employees don’t always make as much money as they might expect. Even before cashing out, there can be hidden costs. Equity incentives are subject to tax, and there’s no common framework across Europe — every country has its own systems and laws.