Starting on September 25, millions of taxpayers who do not have income tax withheld at source will begin paying their income tax. This group typically includes individuals who receive income not subject to automatic tax deductions, such as certain types of investments, freelance earnings, or income from abroad. For these taxpayers, the tax is paid directly to the government, usually in installments throughout the year. Last year, the average amount withheld in September, October, November, and December was more than 1,900 euros. This figure represents the typical payment made by individuals who do not have taxes automatically deducted from their paychecks or other regular income sources. The tax system allows for different methods of payment, depending on the type of income and the taxpayer's situation. Those who do not have taxes withheld at source are required to make regular payments to avoid a large tax bill at the end of the year. This process ensures that taxpayers remain compliant with their obligations and helps prevent unexpected financial burdens when it comes time to file their annual tax returns.