Ability-to-pay taxation requires that higher earning individuals pay a higher percentage of income towards taxes. The tax rate increases as a percentage along with income. For example, in the United States in 2010, a tax rate of 10% applied to incomes between $0 - $8,375; the tax rate increased incrementally up to 35% for those whose incomes were $373,651 or greater (these figures are based on single filers). Critics of ability-to-pay taxation state that the progressive tax reduces the incentive to earn more money, and penalizes those whose hard work and ingenuity have helped them earn higher incomes.