In an increasingly connected world, business travel is essential for companies to maintain and expand their global footprint. So it's no surprise that according to the Global Business Travel Association, in 2016 worldwide organisations spent US$1.3 trillion (approx £1 trillion) on business travel. However, together with great opportunities, this can equally be problematic for companies, as authorities are increasingly scrutinising the activities of mobile workers. Authorities recognise that data is accessible; reporting obligations have become necessary and turning a blind eye is no longer an option. The list of challenges can vary from employment tax, corporate tax and social security, to immigration and safety issues and whilst this is not an exhaustive list, they may all arise as employees travel across borders.