Global firms like Amazon, Google and Starbucks have been criticised for using clever accounting tricks to reduce their tax bills in the UK. But how much tax should they be paying? Evan Davis and guests discuss the whys and wherefores of the international tax regime, including the role of tax havens. Along the way, they'll digest the "Dutch sandwich" and the "double Irish" tax avoidance devices used by some multinationals. And given the widespread perception that many firms don't pay their fair share of tax, they'll assess efforts by the world's major economies to rewrite the rules on corporate tax.

Guests:

Heather Self, Tax Partner, Pinsent Mason

Rolf Rothuizen, Partner, RPS Legal, Amsterdam

Anthony Travers, Chairman, Cayman Islands Stock Exchange

Producer: Sally Abrahams.