What Do Federal Background Checks Look For?

A federal background check looks at your criminal record, finances, employment and education history, personal conduct, substance use, foreign contacts, and (for higher-level positions) what people who know you say about your character. What do federal background checks look for in your specific case depends on which check you’re facing: a basic suitability screen for a low-risk federal job, a Confidential, Secret, or Top Secret security clearance investigation, or a firearm purchase check through the FBI’s National Instant Criminal Background Check System. Each has a different scope and a different bar.

The three tracks aren’t interchangeable. A suitability screening decides whether you’re fit for federal civilian service. A clearance investigation decides whether giving you access to classified information is consistent with national security, and a Top Secret investigation is the most thorough, adding in-person interviews with references, neighbors, and former coworkers.¹ A NICS check decides only whether federal law prohibits you from buying a gun, based on categories like felony convictions, active restraining orders, domestic violence convictions, dishonorable discharge, or unlawful drug use.² The FBI runs full NICS checks directly in 31 states, five U.S. territories, and the District of Columbia; the remaining states run their own through the system.³

Criminal History

Criminal records are central to every federal background check. Investigators look for arrests, charges, convictions, and outstanding warrants across federal, state, and local jurisdictions. The FBI’s National Crime Information Center holds criminal history records, fugitive information, and stolen property records that authorized agencies pull during an investigation.⁴ Fingerprint-based checks run through the FBI’s Criminal Justice Information Services division and match prints against records nationwide.⁵

Not every arrest or conviction reaches the federal database, so state repositories and local courts get searched separately. Prints are typically submitted through a state’s central record repository, which may turn up history not maintained at the federal level.⁶

Having a record isn’t automatically fatal. What matters is the nature, severity, and recency of the offense. A decades-old misdemeanor is treated very differently from a recent felony. For security clearances, criminal conduct is weighed under Guideline J of the adjudicative guidelines, where investigators consider evidence of rehabilitation and how long ago the conduct occurred.⁷

Financial Records and Credit

Credit reports and financial history are checked routinely for federal employment and clearance investigations. Investigators pull your credit report and look at bankruptcies, delinquent debts, collections, and tax liens. The concern isn’t that you’ve ever been broke. It’s whether unmanaged financial problems make you vulnerable to bribery or coercion, or suggest a pattern of irresponsibility.

For clearances, finances fall under Guideline F. Red flags include a history of not meeting financial obligations, frivolous spending, unexplained affluence, and failure to file or pay federal or state taxes.⁷ Debt alone doesn’t disqualify you. Someone with student loans and consistent payments is in a completely different position from someone ignoring IRS notices. Investigators are looking at whether you’re addressing your obligations, not whether your balance sheet is clean.

Federal tax debt gets attention in its own right. Unpaid federal tax debt exceeding roughly $64,000 (adjusted annually for inflation) can trigger certification to the State Department for passport denial or revocation, though that threshold applies to passport actions specifically, not clearance decisions.⁸

Employment and Education Verification

Investigators verify your past jobs, the dates you held them, your reasons for leaving, and your performance. They contact previous employers and may interview former supervisors. Gaps aren’t automatically disqualifying, but unexplained ones raise questions, especially given that the SF-86 requires a continuous 10-year employment timeline. Getting fired won’t necessarily sink your application. Getting fired and hiding it almost certainly will.

Educational credentials get verified with institutions directly. Claiming a degree you didn’t earn is one of the fastest ways to fail a background check, because it’s treated as deliberate falsification rather than a discrepancy.

Personal Conduct, References, and Social Media

For higher-level investigations, investigators interview people who know you. They talk to the references you listed on your SF-86, and they also seek out people you didn’t list, including neighbors and former coworkers. These interviews probe your character and reliability and test whether your lifestyle is consistent with what you reported. Investigators are listening for patterns and looking for whether your story matches what the people around you describe.

Publicly available online activity is part of the picture, particularly for positions in national security. Investigators look for posts that suggest extremist views, illegal activity, or behavior inconsistent with what you reported on your application.

Substance Use and Mental Health

Illegal drug use is a suitability factor for federal employment under 5 CFR 731.202 and a security concern under Guideline H.⁹ All federal employees must refrain from illegal drug use, on or off duty.

Marijuana creates particular confusion because of the gap between state and federal law. Despite legalization in many states, marijuana remains a Schedule I controlled substance under federal law, and using it counts as illegal drug use for federal purposes. OPM has directed agencies not to automatically disqualify applicants based on past marijuana use before they applied. Agencies evaluate case by case, weighing how recently the use occurred, whether the applicant has committed to stopping, and the overall pattern. A commitment to future abstinence carries weight, even where use was relatively recent.¹⁰

Mental health treatment on its own is not disqualifying. The adjudicative guidelines explicitly state that no negative inference may be raised solely because someone sought counseling.⁷ What can raise concerns is behavior suggesting instability or impaired judgment: a pattern of violent or erratic conduct, or a failure to follow a treatment plan for a diagnosed condition that affects reliability. Seeking help is viewed neutrally or favorably. Refusing help for a condition that impairs functioning is what investigators notice.

The SF-86 and Why Honesty Matters Most

For security clearance investigations, the Standard Form 86 is the starting document. It’s the questionnaire investigators use as a roadmap, and filling it out accurately matters more than almost anything else. The form covers residential history, employment, education, foreign contacts, financial records, criminal history, substance use, and mental health treatment.¹¹

Most sections require 10 years of residence and employment history, and 7 years for areas like financial problems, drug use, alcohol-related incidents, and foreign travel. Some questions have no time limit. You must disclose any felony charges ever filed against you, any prior clearance denials or revocations, and any court-martial or military discharge for misconduct, no matter when they occurred.¹¹

Most people who fail do so for the same reason: they left something out. Investigators find discrepancies. Honest disclosure of a past mistake is almost always less damaging than the discovery you tried to hide it.

The Whole-Person Concept

With very few exceptions, no single factor automatically disqualifies you from a clearance. Adjudicators apply the whole-person concept, weighing all available information, favorable and unfavorable, to reach a judgment about whether granting you access to classified information is consistent with national security.⁷

When evaluating concerning conduct, adjudicators consider nine factors: how serious it was, the circumstances, how often it happened and how recently, your age and maturity at the time, whether it was voluntary, evidence of rehabilitation, your motivation, the potential for someone to use it as leverage, and the likelihood it will happen again. A serious mistake from your twenties that you’ve clearly moved past is treated differently from a recent pattern of the same behavior. Rehabilitation, honesty, and time all work in your favor.

For suitability decisions on federal employment, agencies apply a similar balancing test under 5 CFR 731.202, which lists criminal conduct, dishonesty, substance use without evidence of rehabilitation, and misconduct in prior employment as factors.⁹ Rehabilitation appears repeatedly in these regulations. Agencies are supposed to look at the full picture, not just the worst moment.

What Actually Disqualifies People

Falsifying your application, omitting required information, or lying during an interview is consistently the most damaging thing you can do. Investigators call this lack of candor, and it can disqualify you even when the underlying issue you concealed wouldn’t have been disqualifying on its own. Material false statements are a standalone suitability factor and a security concern under Guideline E.⁹ If you’re debating whether to disclose something, disclose it.

Certain criminal offenses carry heavy weight in specialized contexts. For transportation security credentials, the TSA maintains a list of permanently disqualifying felonies including espionage, treason, terrorism, and murder. A separate list of interim disqualifying offenses, including fraud, robbery, arson, and drug distribution, disqualifies applicants if the conviction or release from incarceration occurred within defined lookback periods.¹² For NICS checks, anyone convicted of a crime punishable by more than one year of imprisonment is permanently prohibited from buying a firearm.²

Large, unaddressed debts, tax evasion, and financial fraud are red flags, especially for positions involving money or classified information. A payment plan with the IRS shows responsibility; ignoring collection notices does not.

A dishonorable military discharge is a significant negative factor for clearances and permanently prohibits firearm purchases under federal law.²

Continuous Vetting Doesn’t End at Hire

If you hold a security clearance, the background check isn’t a one-time event. The federal government has moved away from periodic reinvestigations every 5 or 10 years and now uses continuous vetting: automated, ongoing record checks that monitor cleared personnel in real time.¹³ The Defense Counterintelligence and Security Agency pulls data from criminal, terrorism, and financial databases, along with public records, at any point during your period of eligibility. A new arrest, a significant credit event, or a terrorism-related hit can prompt further investigation. There’s no longer a five-year window where you’re essentially unmonitored between reviews.

If You’re Denied

A negative result doesn’t have to be final. Your options depend on the type of check.

If DCSA denies or revokes your clearance eligibility, you can appeal in writing to your Component Personal Security Appeal Board, or request a personal hearing before an administrative judge at the Defense Office of Hearings and Appeals.¹⁴ The hearing lets you present evidence of rehabilitation, correct factual errors, or provide context the investigation missed.

If OPM makes an adverse suitability determination that blocks you from a federal civilian job, you can appeal to the Merit Systems Protection Board. You generally have 30 calendar days from the date you receive the agency’s decision to file, with an additional 30 days available if both sides agree to try alternative dispute resolution first.¹⁵ An administrative judge hears the case, and either party can petition the full three-member Board for review.¹⁶

If NICS denies your firearm purchase, you can request the reason and submit a formal challenge to the FBI, which must respond within 60 calendar days with a final determination.¹⁷ If the denial relied on incorrect records, you can go to the agency that supplied them and get the record corrected. If administrative remedies fail, federal law lets you file a civil lawsuit to compel correction of erroneous information or approval of the transfer, and the court can award attorney’s fees to the prevailing party.¹⁸

Sometimes the problem is a record error, not your actual history. Criminal records can contain misidentifications, outdated information, or entries that should have been expunged. Credit reports can contain debts that aren’t yours. Under the Fair Credit Reporting Act, if a third-party screening company produces a report with errors, you can dispute them; the company then has 30 days to investigate and 5 additional days to notify you of the results, and information that can’t be verified must be deleted. Whatever the type of check, your first step after any denial is finding out exactly what information triggered it, because the fix usually starts with correcting the underlying record.

1
Federal Bureau of Investigation. Security Clearances for Law Enforcement
2
Office of the Law Revision Counsel. 18 US Code 922 – Unlawful Acts
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Federal Bureau of Investigation. About NICS
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Federal Bureau of Investigation. National Crime Information Center (NCIC) – FBI Information Systems
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Federal Bureau of Investigation. Criminal Justice Information Services (CJIS)
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Federal Bureau of Investigation. National Fingerprint Based Background Checks Steps for Success
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Office of the Director of National Intelligence. Security Executive Agent Directive 4 National Security Adjudicative Guidelines
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Internal Revenue Service. Revocation or Denial of Passport in Cases of Certain Unpaid Taxes
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eCFR. 5 CFR Part 731 Subpart B – Determinations of Suitability or Fitness
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U.S. Office of Personnel Management. Assessing the Suitability/Fitness of Applicants or Appointees on the Basis of Marijuana Use
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U.S. Office of Personnel Management. Standard Form 86 – Questionnaire for National Security
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Transportation Security Administration. Disqualifying Offenses and Other Factors
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Defense Counterintelligence and Security Agency. Continuous Vetting
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Defense Counterintelligence and Security Agency. Security Review Proceedings FAQ
15
U.S. Merit Systems Protection Board. How to File an Appeal
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U.S. Merit Systems Protection Board. Appellant Questions and Answers
17
Federal Bureau of Investigation. Requesting Reason for and/or Challenging a NICS-Related Denial
18
Office of the Law Revision Counsel. 18 US Code 925A – Remedy for Erroneous Denial of Firearm