The difference between an arrest and a conviction is the difference between suspicion and proof. An arrest is the moment police take you into custody because they have probable cause to believe you committed a crime. A conviction is a court’s formal finding that you are guilty, either after a trial or after you plead guilty or no contest. Everything that follows in your life — your record, your rights, your job prospects, your ability to travel — turns on which side of that line you land on.
What an Arrest Actually Is
Police can arrest you when the facts available would lead a reasonable person to believe a crime was committed.1Legal Information Institute. Probable Cause That standard, called probable cause, is deliberately low. Officers don’t need certainty. They don’t even need strong evidence. They need enough to justify taking you in.
After the arrest comes booking: your name and personal details are recorded, fingerprints and a photograph are taken, and the alleged offense is logged.2COPS Office. TAP and the Arrest, Booking, and Disposition Cycle From there the case moves to a prosecutor, who decides whether to file formal charges.3United States Department of Justice. Initial Hearing / Arraignment Prosecutors regularly decline to file, reduce charges, or send cases to diversion programs when the evidence isn’t there.
The point to hold onto: an arrest is an accusation. It proves nothing. Plenty of people are arrested and never charged, or charged and later acquitted.
What a Conviction Is
A conviction is a formal legal determination that you are guilty of a crime. It happens one of two ways. A judge or jury finds you guilty after trial, or you plead guilty or no contest and the court accepts the plea.4Legal Information Institute. Conviction A no-contest plea carries the same sentencing consequences as a guilty plea even though you aren’t formally admitting the conduct.
To convict, the prosecution has to meet the highest standard in the legal system: proof beyond a reasonable doubt. The evidence has to be strong enough to leave the judge or jury firmly convinced of guilt.5Legal Information Institute. Beyond a Reasonable Doubt The standard is that high because the consequences are that severe. You can lose your liberty, face heavy fines, and carry a permanent record.
Convictions come in two grades. A misdemeanor is a less serious offense, generally carrying up to one year in jail. A felony can result in a prison sentence longer than one year. That line matters, because many of the long-term restrictions below attach only to felony convictions.
How the Two Records Show Up on Background Checks
An arrest record and a conviction record are different documents. An arrest record documents the detention and initial accusation and contains no finding of guilt. A conviction record is proof of guilt and includes the offense, the date, and the sentence imposed.6U.S. Equal Employment Opportunity Commission. Criminal Records
Federal law limits how long they can be reported. Consumer reporting agencies cannot include arrest records on background reports if the arrest is more than seven years old and did not result in a conviction.7Office of the Law Revision Counsel. 15 USC 1681c – Requirements Relating to Information Contained in Consumer Reports Convictions have no federal time limit. They can be reported indefinitely. Some states shorten the arrest window further or ban reporting non-conviction records outright, but the federal floor is seven years for arrests and forever for convictions.
Employment and Housing
Federal guidance draws a sharp line between the two. The EEOC’s enforcement guidance states that “the fact of an arrest does not establish that criminal conduct has occurred” and that excluding a job candidate based solely on an arrest is not consistent with business necessity under Title VII.8U.S. Equal Employment Opportunity Commission. Enforcement Guidance on the Consideration of Arrest and Conviction Records in Employment Decisions An employer can investigate the underlying conduct if it’s relevant to the job. The arrest itself is not evidence of wrongdoing.
Convictions are treated differently. The EEOC recognizes that a conviction record generally serves as sufficient evidence that a person engaged in criminal conduct, because of the procedural safeguards built into trials and guilty pleas.8U.S. Equal Employment Opportunity Commission. Enforcement Guidance on the Consideration of Arrest and Conviction Records in Employment Decisions Employers can weigh convictions, especially when the offense relates to the position. Landlords do the same in housing screening. Some local ordinances limit what they can consider, but convictions carry far more weight than arrests in any screening process.
Rights You Can Lose Only After Conviction
Several restrictions attach to a conviction and not to an arrest.
Firearms
Federal law prohibits anyone convicted of a crime punishable by more than one year of imprisonment from possessing a firearm or ammunition.9Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts In practical terms, most felony convictions permanently ban gun ownership. An arrest without conviction does not trigger the prohibition. The statute requires a conviction.
Voting
An arrest has no effect on your right to vote anywhere in the country. Felony convictions cause at least temporary disenfranchisement in most states. Two states and D.C. never take voting rights away, even during incarceration. Roughly 23 states restore rights automatically on release from prison. About 15 states restore rights only after parole or probation is complete. Around 10 states impose longer waiting periods or require a governor’s pardon for certain offenses.10National Conference of State Legislatures. Restoration of Voting Rights for Felons Even where restoration is automatic, you still have to re-register.
Professional Licensing
Licensed professionals — nurses, doctors, teachers, attorneys — face reporting rules that most people don’t know exist. Many state licensing boards require you to report not just convictions but arrests, often within days. Failing to report can itself be grounds for discipline, separate from the criminal case. If you hold a professional license and get arrested, check your board’s rules right away, even if you expect the charges to go nowhere.
Immigration: Where the Line Blurs
For non-citizens, the arrest-versus-conviction distinction is more complicated, and the risks are steeper. Immigration law uses its own definition of “conviction” that is broader than the criminal-court definition. Under federal immigration law, a conviction includes any formal judgment of guilt. It also includes situations where the court withholds adjudication so long as you pled guilty, pled no contest, or admitted enough facts to support a finding of guilt, and the judge imposed some form of punishment or restraint on liberty.11Office of the Law Revision Counsel. 8 USC 1101 – Definitions Deferred adjudications, suspended sentences, and some diversion programs that count as “no conviction” in criminal court may still count as convictions for deportation purposes.
The deportability grounds in federal law generally do require a conviction for offenses like crimes of moral turpitude, drug offenses, firearms offenses, and domestic violence.12Office of the Law Revision Counsel. 8 USC 1227 – Deportable Aliens But certain inadmissibility grounds don’t require a conviction at all. An immigration officer who “knows or has reason to believe” a person has been involved in drug trafficking can deny entry on that belief alone.13U.S. Citizenship and Immigration Services. Inadmissibility and Waivers The same applies to prostitution, human trafficking, and certain other conduct-based grounds. For non-citizens, even an arrest that never leads to charges can create lasting immigration problems.
International Travel
A conviction can restrict entry to other countries. Canada is where Americans get tripped up most often. Under Canada’s Immigration and Refugee Protection Act, a foreign national is inadmissible if convicted of an offense equivalent to an indictable offense under Canadian law.14Government of Canada. Immigration and Refugee Protection Act SC 2001, c. 27 – Section 36 Common U.S. offenses like DUI can qualify. Canadian border agents have access to U.S. criminal records and can turn you away based on a conviction that is decades old. A person deemed rehabilitated or holding a Temporary Resident Permit may be allowed in, but the burden is entirely on the traveler.
An arrest without conviction can still cause trouble at the Canadian border. If a border agent sees the arrest, you may need documentation showing the case ended without a conviction. Pending charges create similar complications. Other countries run their own criminal-record screening, and a felony conviction is the most common trigger for denial.
Clearing the Record
People with arrest records that never led to a conviction have the strongest case for clearing that record. The process is called expungement (destroying the record) or sealing (making it inaccessible to the public), and the rules vary a lot by jurisdiction. In most places you file a petition with the court. Filing fees range from nothing to several hundred dollars. Successful expungement means the arrest won’t appear on standard background checks, and in most contexts you can legally deny that the arrest happened.
Conviction records are harder to clear. Eligibility depends on the offense, the time that has passed, and whether you’ve completed your sentence. Felony convictions are the hardest, and many jurisdictions don’t allow expungement at all for serious offenses. Even where expungement is available, some government agencies and law enforcement databases may still retain access to sealed records.
One detail worth knowing: sealed or expunged records are not necessarily invisible to immigration authorities. Canadian border officers, for example, may still treat a sealed record as a criminal record under their own immigration law. If you’re planning international travel after clearing your record, carry documentation of the expungement or dismissal with you.