10-year collection period
By law, the IRS has only 10 years from the date your income tax is assessed to collect it from you. For example, if you reported an outstanding tax bill on your 2014 tax return on April 15, 2015, in most cases the IRS has until April 15, 2025 to collect the tax from you. Therefore, the IRS will require monthly payment amounts that are large enough to pay off the entire tax bill by the end of the 10-year period. If you ignore your tax bill entirely, the IRS can secure collection of the tax you owe through wage garnishments or by placing liens on your personal property.