返税或退税（Tax refund）是指在年度结算中个人应缴税额小于实际缴税时，从政府处退回的金额。也就是说，在每个财政年的结尾，根据个人报税有两种情况，如果缴税不够就要补交，多缴了就会退回一部分。

所得税的代扣金额基于个人总收入计算，在欧美国家，所得税通常会获得各种减免额，使得一部分收入不须缴税，有的政策可以计算其它财产的损失（例如股票）而得到税收减免，因此大部分的纳税人都可以获得返税。 政府以此鼓励纳税人将每年的收支、经济活动报告给税务部门。在美国，甚至有非法移民也会报税，认为报税可能有助于将来获得合法居留权。

A tax refund or tax rebate is a refund on taxes when the tax liability is less than the taxes paid. Taxpayers can often get a tax refund on their income tax if the tax they owe is less than the sum of the total amount of the withholding taxes and estimated taxes that they paid, plus the refundable tax credits that they claim. (Tax refunds are money given back at the end of the financial year.)