A federal refund can shrink for two reasons that look alike on a bank statement: the IRS changed the return, or Treasury applied part of the refund to a debt. For the second kind, the IRS names four categories: past-due child support, federal agency non-tax debts, state income tax obligations and certain state unemployment compensation debt. The Bureau of the Fiscal Service, not the IRS, carries out those offsets.
A notice decoder and a refund status tracker. An offset notice names an agency but not the route for contesting the debt; The IRS Refund Recovery Kit pairs a notice decoder with a refund status tracker spreadsheet.
Sort IRS adjustment notices from Fiscal Service offsets →
Four debts on the Treasury Offset list
The IRS reduced-refund topic page, last reviewed June 1, 2026, lists the debts as “past-due child support,” “federal agency non-tax debts,” “state income tax obligations” and “certain state unemployment compensation debt.” A state tax bill and a federal debt are therefore two entries on a list of four, and child support is a third. The IRS’s separate refunds page condenses the same idea to “child support, federal agency nontax debt or state income tax.”
Federal taxes from an earlier year are handled differently. The topic page puts “previous taxes owed” among the adjustments the IRS itself makes to a refund, alongside math errors, ineligible credits or deductions, and underpaid estimated taxes. Those come with an IRS notice describing how the refund was applied. A debt offset is a separate action by a separate agency.
The Fiscal Service sends the notice and runs the program
The topic page states that “debt offsets are conducted by the Department of Treasury’s Bureau of the Fiscal Service,” which issues IRS refunds and is authorized by Congress to run the Treasury Offset Program. The Fiscal Service’s own program page, updated February 25, 2026, says the program collects past-due debts for state and federal agencies and that it recovered more than $3.8 billion in federal and state delinquent debts in fiscal year 2024.
Questions about an offset go to the Fiscal Service at 800-304-3107, or 800-877-8339 for TTY, Monday through Friday from 7:30 a.m. to 5 p.m. Central time, according to the IRS topic page. The IRS refunds page lists separate automated lines for refund status, 800-829-1954, and for amended returns, 866-464-2050, but the offset itself sits with the Fiscal Service.
Three figures and an agency name on the offset notice
The Fiscal Service mails the notice. According to the IRS, it shows the original refund amount, the offset amount and the agency receiving the payment. Those three items let a taxpayer reconcile what the return claimed, what arrived and what was kept. The agency line identifies the creditor: a state child-support office, a state revenue department, a state unemployment agency or a federal agency.
The timing of a refund adds to the confusion. The refunds page says an e-filed return is expected to produce a refund in about three weeks and a mailed return in six or more. The IRS app page says refund status can be checked there. The refunds page adds that refund status appears 24 hours after a current-year return is e-filed and four weeks after a paper return is filed, and that the tracking tools ask for the exact refund amount, Social Security number or ITIN, filing status and tax year.
Injured spouse relief when a joint refund pays a partner’s debt
On a joint return, the debt may belong to only one spouse. For that case the IRS topic page says the other spouse “may be entitled to get back your portion of the refund” and directs readers to request injured spouse relief. The page links to a dedicated IRS page for the request, which this article does not summarize, and the topic page does not give a processing time.
The topic page does not say how many households each year are affected, and the Fiscal Service total of more than $3.8 billion covers federal and state delinquent debts recovered, and the page does not break it down by refund offsets. Those are the only scale figures in the pages read.
The practical stakes are plain: a household that filed jointly and sees a refund reduced for a debt the other spouse alone owes has a separate remedy, directed to the IRS, apart from any dispute with the creditor agency.
A notice that names the creditor but not the way to contest the debt
Three things make an offset hard to untangle. The offset is made by the Fiscal Service rather than the IRS, so the agency a filer has been dealing with is not the one that acted. The notice names the creditor agency instead of explaining a route. And four different categories of debt mean four different kinds of creditor, from a state revenue department to a federal agency.
The Fiscal Service’s program page directs people to contact the creditor agency directly. Calling the Fiscal Service line, contacting the creditor and requesting injured spouse relief from the IRS are each done directly with the agencies and need no paid help.
The IRS reduced-refund page, last reviewed June 1, 2026, is the controlling source on which debts can be offset, and it does not name student loans as a category. A federal agency non-tax debt is the heading the page uses.
Matching a smaller refund to the agency that reduced it
An offset notice arrives separately from any IRS adjustment notice and lists the creditor agency without laying out how to contest the debt. A joint filer whose spouse alone owes it has a different request to make.
The IRS Refund Recovery Kit includes a notice decoder and a refund status tracker spreadsheet inside a 13-page kit that has a section on offsets.
Work out which agency reduced a refund and what the notice says →
Drafting of this article used AI, with its facts checked against the Treasury and IRS pages linked above.
