For decades, states’ authorities to tax the earnings of multinational corporations have ended abruptly at the “water’s edge.” Frustration with this limitation, however, has grown in recent years as large, sophisticated businesses employ accounting techniques and asset transactions to shift their domestic earnings offshore.

Mandatory worldwide combined reporting—an apportionment method requiring the calculation of taxes based on global income attributable to a particular jurisdiction—is one possible solution gaining attention in state capitals. Lawmakers in Minnesota came close to enacting a worldwide system last year and the New Hampshire House debated, but failed to approve, the calculation method earlier this month. Legislators in other states have also discussed this tax calculation method.

On this episode of Talking Tax, Bloomberg Tax senior reporter Michael J. Bologna discusses worldwide combined reporting with two Democratic state lawmakers committed to reforms that would limit income shifting by multinationals. Minnesota Rep. Aisha Gomez is chair of the state's House Taxes Committee and Rep. Emilie Kornheiser is chair of the Vermont House Ways and Means Committee.

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