A statute of limitations on tax collections is the legal time limit within which a taxing authority may collect an assessed tax debt through enforced means such as levies, garnishments, or court action.

For federal taxes, the main rule is in 26 U.S.C. § 6502: the IRS generally has 10 years from the date of assessment to collect. That period can be extended or suspended in specific situations, including bankruptcy, a collection due process hearing, an offer in compromise, certain installment agreement requests, time spent outside the United States for at least six months, and some military service protections. Once the collection statute expiration date passes, the IRS usually cannot keep using enforced collection tools on that assessed debt.

State rules are separate. In Pennsylvania, collection authority depends on the tax involved and the governing statute. For many state tax liabilities, the Pennsylvania Department of Revenue may use liens, offsets, and other collection methods under the Fiscal Code of 1929 and related tax statutes, and the applicable deadlines are not always identical to the federal 10-year rule. Local taxes can follow different enforcement timelines as well.

The deadline matters in practice because collection power often affects settlement money, wage withholding, bank accounts, and tax liens. If an injured person receives a recovery while an old tax debt is still legally collectible, a government claim or offset may reduce what actually reaches the person. Accurate statute calculations can change negotiation strategy and whether a debt remains enforceable at all.