UBI would also substantially increase government revenues. At the moment, nearly half of all earners don’t get paid enough to owe federal income tax. Once people have a UBI, every dollar earned from work, or from other sources such as interest or capital gains, could be taxed. For instance, if you are currently single and earn $10,000 in employment income, you do not need to file a federal income tax return. With a UBI, that could be taxed at a rate of 25 per cent, generating $2,500 in tax revenue. This could provide as much as $0.3 trillion based on a back-of-the-envelope calculation. People who already pay taxes would of course also effectively be paying back some of their UBI through these taxes. Applying a 25 percent tax rate to that group, which would receive roughly half of all UBI payments, would decrease the required amount by an additional $0.4 trillion. In other words, the net amount required for a UBI with a 25 per cent federal tax rate applied starting with the first dollar earned would about $2.3 trillion.