1. A multi-national forms a subsidiary in Ireland where its tax rate is just 12.5%. 2. Then virtually all the Irish income is eventually shifted to another subsidiary located in a tax haven, such as the Cayman Islands or Bermuda, which imposes no taxes on company profits. 3. The tax-haven subsidiary charges the Irish subsidiary "royalties", causing a transfer of profits from the Irish subsidiary (thus escaping the 12.5% Irish tax) to the tax haven subsidiary. Once the profits hit the tax haven subsidiary, they become impossible to track because of a lack of disclosure requirements.
