Suing USCIS for Delay: When a Mandamus or APA Lawsuit Makes Sense

By Erick Widman, Immigration Attorney, Passage Immigration Law. Reviewed October 2026.

If USCIS has taken far longer than normal to decide your case, you may have heard that you can sue. Sometimes that is a sound option. Sometimes it is not. This guide explains what a delay lawsuit is, the legal test courts use, what to try first, what it costs in court fees, and what can and cannot happen.

General information only. This is not legal advice for your situation.

Is your case stuck? Request a consultation to talk through whether a delay lawsuit fits your situation.

The short version

• A delay lawsuit asks a federal district court to order USCIS to make a decision. It does not ask the court to approve your case.
• The two common legal bases are the Mandamus Act, 28 U.S.C. 1361, and the Administrative Procedure Act (APA), 5 U.S.C. 555(b) and 706(1). Many lawsuits plead both.
• Courts decide whether a delay is “unreasonable” by weighing several factors. A case that is merely past a posted processing time is not automatically unreasonable.
• Naturalization has its own rule. If USCIS does not decide your N-400 within 120 days after your interview, you may ask the district court to decide it or send it back with instructions (8 U.S.C. 1447(b)).
• A lawsuit may lead USCIS to decide the case. The decision can be an approval or a denial. No attorney can promise which.

What a delay lawsuit is

Federal law requires an agency to conclude a matter presented to it “within a reasonable time” (5 U.S.C. 555(b)), and a court may “compel agency action unlawfully withheld or unreasonably delayed” (5 U.S.C. 706(1)). The Mandamus Act gives district courts jurisdiction over actions to compel an officer or agency to perform a duty owed to the plaintiff (28 U.S.C. 1361).

The Supreme Court has limited these claims. In Norton v. Southern Utah Wilderness Alliance, 542 U.S. 55 (2004), the Court held that a claim under 5 U.S.C. 706(1) can only proceed to compel a discrete agency action that the agency is legally required to take. For most immigration applications, deciding the application is that discrete action. A court can order USCIS to decide. It cannot dictate what the decision is.

How courts decide whether a delay is unreasonable

Courts commonly apply the six factors from Telecommunications Research and Action Center v. FCC, 750 F.2d 70 (D.C. Cir. 1984), often called the TRAC factors. The Ninth Circuit, which covers Oregon and Washington, applied them in Independence Mining Co. v. Babbitt, 105 F.3d 502 (9th Cir. 1997). In summary, courts look at:

1. Whether the agency’s time is governed by a “rule of reason.”
2. Whether Congress set a timetable or an indication of the speed it expects.
3. Whether delay is less tolerable when human health and welfare are at stake.
4. The effect of ordering action on other agency activities with competing priorities.
5. The nature and extent of the interests harmed by the delay.
6. Whether the agency acted in bad faith. The court does not need to find impropriety to find unreasonable delay.

Congress has expressed the sense that applications should be completed within 180 days (8 U.S.C. 1571(b)). That is not a deadline you can enforce, but courts may consider it under the second factor.

When a lawsuit may make sense

Each case is different, and these are general considerations, not a rule:

• Your case has been pending well past normal processing time shown on the USCIS processing times page for your form and office.
• You have already tried the ordinary steps below without a useful answer.
• The delay is causing concrete harm, such as a family separated, a lost job offer, or an expiring status or document.
• There is a discrete, non-discretionary action USCIS has not taken, such as deciding the application or scheduling the interview.

When it may not

• Your case is still within normal processing time.
• USCIS has already decided the case. A denial is challenged differently, by appeal, motion, or a different type of lawsuit.
• The delay stems from a decision the law commits to agency discretion. The government may argue that 8 U.S.C. 1252(a)(2)(B)(ii) bars review in some circumstances.
• The delay is at the consulate after an interview. Consular delay raises different legal issues and often a different strategy.
• The case is subject to a policy or hold that a court is reviewing. In June 2026, a federal court in Rhode Island vacated USCIS policy memoranda PM-602-0192 and PM-602-0194 and Policy Alert PA-2025-26 (Dorcas International Institute of Rhode Island v. USCIS), and USCIS has said it will follow the order pending further review.

What to try before suing

1. Check USCIS processing times for your form and office. If your case is outside the posted time, submit a service request through USCIS online (USCIS Policy Manual Volume 1, Part A, Chapter 4 describes the service request tool).
2. If there is an urgent reason, consider an expedite request. USCIS considers requests based on specific criteria in Policy Manual Volume 1, Part A, Chapter 5.
3. Contact your U.S. Representative or Senator’s casework office. This often prompts a status response.
4. File a FOIA request to see your file and any internal notes that explain the delay.
5. Speak with an attorney about whether the facts support a lawsuit and the risks involved.

For more on these steps, see our guides on following up on a delayed case with USCIS and what to do when your I-485 is pending too long. These steps cost little and sometimes resolve the problem. They are not required before filing suit, but a record of attempts can help show the delay is unreasonable.

Naturalization: the 120-day rule

If USCIS does not make a determination on your N-400 within 120 days after the date of your naturalization examination (interview), you may apply to the U.S. district court for the district where you live. The court has jurisdiction and may decide the matter itself or remand it to USCIS with instructions (8 U.S.C. 1447(b)). Our guide to the citizenship application in 2026 covers the interview itself. Timing matters, and this route has strategic tradeoffs, including that the court, not USCIS, may then control the case.

What happens after you file

• You file a complaint in the district court where you live (venue lies under 28 U.S.C. 1391(e)). For Oregon residents that is the District of Oregon, and for Washington residents the Western or Eastern District of Washington.
• The court filing fee is $405: a $350 filing fee under 28 U.S.C. 1914(a) and a $55 administrative fee under the Judicial Conference’s district court fee schedule. You also pay for service of process.
• The government is served through the U.S. Attorney’s office, the Attorney General, and the agency. Federal agencies generally have 60 days after service on the U.S. Attorney to respond (Federal Rule of Civil Procedure 12(a)(2)).
• Common outcomes include USCIS deciding the case after the suit is filed, the government asking the court to dismiss, the parties agreeing to a schedule, or the court ruling on the delay. A decision from USCIS may be an approval or a denial, and any outcome can take months.
• Filing a lawsuit does not guarantee approval and does not protect you from the consequences of a denial.

Frequently asked questions

How long does USCIS have to decide my case?
There is no single deadline. Federal law requires agencies to decide matters within a reasonable time. Courts decide what is reasonable by weighing the TRAC factors. Processing times vary by form and office.

Will a lawsuit guarantee my case gets approved?
No. A delay lawsuit asks a court to require a decision. USCIS may approve or deny, and results vary.

Can I sue if my case is waiting for a background check?
Sometimes. The government often argues that pending checks justify delay. Courts weigh the length of the delay, the harm caused, and the reasons given. This area is fact specific, so have an attorney review your case.

How much does it cost?
The court filing fee is $405, plus service costs.

Do I have to live in Oregon or Washington to hire you?
Federal court cases are filed where the plaintiff lives. We handle federal litigation, and we can discuss which court would hear your case during a consultation.

What if I already got a denial?
A denial is not a delay. Deadlines to appeal, file a motion, or challenge the decision can be short. Contact an attorney right away.

Next steps

If your case has been delayed and you want to know whether a lawsuit fits, request a consultation below. Have your receipt notice, your most recent USCIS correspondence, and a list of steps you have already taken. You can also call (503) 427-8243, or learn more about our delay litigation services.

Results depend on the facts of each case, and nothing here guarantees an outcome.