a person who pays tax to the government, especially on the money that they earnExtra examples Hundreds of thousands of pounds of taxpayers’ money have been spent on the project. It was estimated to have cost the US taxpayer $35 billion. Should politicians be able to travel first class at the taxpayer’s expense? The changes make an average taxpayer £2.50 a week better off. The proposals will be popular with higher-rate taxpayers. What is the cost to the taxpayer of hosting the Olympics?