Taxes are generally paid annually by individual taxpayers during the tax season, which runs from January 1 to around April 15 each year. The specific deadline for paying taxes for the previous year is usually April 15; if this date falls on a weekend or holiday, the deadline is extended to the next business day. Payments should be made by midnight on that tax day to avoid penalties and interest. Extensions can be filed to delay submitting tax forms, but payments are still due by the original deadline. Additionally, self- employed individuals or those with income not subject to withholding may need to make estimated quarterly tax payments throughout the year.