Bail was invented in stages over thousands of years, but the system recognizable today took shape in medieval England and was codified by the Statute of Westminster in 1275. Earlier versions of the idea existed in ancient Rome and Babylon, and an Anglo-Saxon practice called borh served as its direct ancestor. The English model crossed the Atlantic with the colonists and was written into the U.S. Constitution’s Eighth Amendment in 1791. Everything since then, including commercial bail bonds, federal reform statutes, and the current push to abolish cash bail, is a reworking of that medieval foundation.
The Ancient Idea: Someone Stands Behind the Accused
Long before anyone used the word “bail,” ancient societies worked out how to let an accused person go home without losing them before judgment. The answer across cultures was a personal guarantee. A trusted third party pledged property, money, or their own freedom to vouch for the accused.
In ancient Rome, the Law of the Twelve Tables, from roughly 450 BC, formalized this through the role of the vindex, a personal guarantor in legal proceedings. The requirements tracked social class: a landowner needed another landowner to stand for him, while anyone could vouch for a person without property.1The Latin Library. The Law of the Twelve Tables The Code of Hammurabi, a Babylonian legal text from around 1750 BC, contained related provisions on sureties and guarantees. These systems ran on community trust rather than cash deposits, but they established the principle every later bail system would rest on: something of value stands behind a person’s promise to appear.
Anglo-Saxon England and the Borh
The direct ancestor of modern bail is an Anglo-Saxon practice called borh. Like bail today, borh was meant to ensure an accused person showed up before a judicial officer, and it also guaranteed payment of any fines or compensation if the accused were convicted.2Constitution Annotated. Constitution Annotated – Amdt8.2.1 Historical Background on Excessive Bail
By the early 900s, family, friends, and acquaintances could serve as borh, and property could be pledged as security. A person with neither connections nor property stayed locked up until trial. By mid-century, every person in England was required to have a borh, binding surety and principal “body for body.” The value of the pledge matched the penalty the accused would face if convicted, so the stakes were concrete.
1275: The Statute of Westminster Codifies Bail
The Norman Conquest of 1066 disrupted this straightforward arrangement. Criminal justice shifted from local community affairs to a function of the state. Capital and corporal punishment replaced money fines for all but minor offenses, and the gap between accusation and trial grew as royal judges rode circuits across the country. Matching a pledge to a potential execution was arbitrary in a way matching one to a fine had never been, and defendants facing death had far more reason to run.
Local sheriffs controlled who was released and who was not. The discretion was broad, and the corruption was widespread. Sheriffs extracted payments and denied release for reasons that had nothing to do with the case.
Parliament answered with the Statute of Westminster the First in 1275. It laid out a detailed list of which offenses were bailable and which were not, and it served as the basic authority on bail for roughly five and a half centuries.3Justia. US Constitution Annotated – Eighth Amendment – Excessive Bail It also required sheriffs to weigh the evidence: Was the accused caught in the act? Had they confessed? Were the charges based only on suspicion? Had they tried to flee or offended before? This moved bail decisions away from a sheriff’s whim toward something resembling an evidence-based assessment. If any single moment deserves to be called the invention of bail as a legal institution, it is this one.
1689: Curbing Excessive Bail
Even with the Statute of Westminster on the books, abuses continued. Judges and officials kept people locked up by setting bail so high that no one could pay. The Habeas Corpus Act of 1679 required that detained persons be brought before a court, which could then grant bail with sureties unless the prisoner was held on charges for which bail was not permitted.4Legislation.gov.uk. Habeas Corpus Act 1679
The practice of impossible bail amounts persisted, so Parliament attacked it directly in the Bill of Rights of 1689, declaring “that excessive bail ought not to be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted.”5Avalon Project. English Bill of Rights 1689 The preamble was blunt: “excessive bail hath been required of persons committed in criminal cases to elude the benefit of the laws made for the liberty of the subjects.” Officials were weaponizing high bail to keep people in, and Parliament said so.
Bail Comes to America
English colonists brought these principles with them, and in some cases pushed them further than English law had. The Massachusetts Body of Liberties of 1641 declared that no person could be imprisoned before sentencing if they could provide sufficient bail, unless charged with a capital crime or contempt of court.6University of Wisconsin. Massachusetts Body of Liberties, December 1641
After independence, bail protections were written into the founding state documents. The Virginia Declaration of Rights, adopted unanimously in June 1776, declared “that excessive bail ought not to be required, nor excessive fines imposed; nor cruel and unusual punishments inflicted.”7The Avalon Project. Virginia Declaration of Rights The Pennsylvania Constitution of 1776 included nearly identical language.8The Founders’ Constitution. Amendment VIII – Pennsylvania Constitution of 1776, Secs. 29, 38, 39
The Northwest Ordinance of 1787 guaranteed that “all persons shall be bailable, unless for capital offenses, where the proof shall be evident or the presumption great.”9Avalon Project. Northwest Ordinance; July 13, 1787 The Judiciary Act of 1789 applied the principle to federal courts, specifying that bail “shall be admitted, except where the punishment may be death.”10United States District Court. 1 Stat. 73 – An Act to Establish the Judicial Courts of the United States
The Eighth Amendment, ratified in 1791, locked the prohibition on excessive bail into the Bill of Rights. Its language was lifted with minor changes from the English Bill of Rights of 1689 by way of the Virginia Declaration, and James Madison introduced it in the House.2Constitution Annotated. Constitution Annotated – Amdt8.2.1 Historical Background on Excessive Bail One point of the amendment is often misunderstood: it prohibits excessive bail but does not guarantee a right to bail in every case.
1898: Commercial Bail Bonds
For most of bail’s history, the sureties were personal: a friend, a family member, a community figure willing to put reputation and assets on the line. That changed in 1898, when Peter and Tom McDonough opened the first known commercial bail bond business in San Francisco. For a nonrefundable fee, a bonding company would guarantee a defendant’s appearance.
Under the arrangement that spread from there, a defendant or their family pays a bond agent a premium of roughly 10 percent of the total bail amount, which the defendant never gets back regardless of the outcome. The agent posts the full bail with the court and absorbs the risk if the defendant disappears. The United States and the Philippines are the only two countries that permit a for-profit commercial bail bond industry; everywhere else uses government-run pretrial release.
20th-Century Federal Reform
The Bail Reform Act of 1966
By the mid-20th century the cash bail system was drawing heavy criticism for penalizing poverty. Defendants who could not afford bail sat in jail for weeks or months awaiting trial, losing jobs and housing, even on minor charges. Congress responded with the Bail Reform Act of 1966, whose stated purpose was to ensure “that all persons, regardless of their financial status, shall not needlessly be detained” while awaiting trial.11Congress.gov. Bail Reform Act of 1966 The default in federal court became release on personal recognizance or an unsecured bond. The Act had one blind spot: it focused entirely on flight risk and gave judges no authority to consider danger to the community.
The Bail Reform Act of 1984
The 1984 Act rewrote that rule. For the first time in federal law, judges could order pretrial detention based not only on flight risk but also on danger to the community. If no combination of release conditions can reasonably ensure both appearance and public safety, the judge must order detention. The Act also created rebuttable presumptions favoring detention for certain drug, violent, terrorism, and child-victim offenses, shifting the burden onto the defendant to argue for release.12Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial
Stack v. Boyle and United States v. Salerno
Two Supreme Court cases shaped the modern meaning of these statutes. In Stack v. Boyle (1951), the Court struck down a uniform $50,000 bail imposed on twelve Smith Act defendants, holding that bail set “at a figure higher than an amount reasonably calculated to fulfill the purpose of assuring the presence of the defendant” is excessive.13Justia U.S. Supreme Court Center. Stack v. Boyle Bail had to be individualized.
In United States v. Salerno (1987), the Court upheld the 1984 Act’s detention provisions, ruling that preventing danger to the community is a legitimate regulatory goal and that the Eighth Amendment does not require release on bail in every case.14Justia. United States v. Salerno
Where Bail Is Going
The 21st century has brought the most aggressive challenges to cash bail since the system’s medieval origins. The criticism echoes what Congress acknowledged in 1966: cash bail punishes poverty. A defendant on a minor charge who cannot find a few hundred dollars may sit in jail for months, while a wealthier defendant on a serious charge walks out in hours. Research consistently shows that even brief pretrial detention increases the likelihood of conviction, guilty pleas, and future arrests.
Several states have moved to overhaul or eliminate cash bail. New Jersey virtually ended cash bail in 2017 after 62 percent of voters approved a 2014 referendum, shifting to a risk assessment approach. New York ended money bail for most misdemeanors and many nonviolent felonies in 2020. Illinois went furthest, abolishing cash bail entirely through its Pretrial Fairness Act, which took effect in September 2023. Under that system, judges decide pretrial release based on risk of flight or danger to the community rather than ability to pay.
Some jurisdictions have turned to pretrial risk assessment algorithms that score defendants on factors like criminal history, age, and prior failures to appear. Critics argue that because arrest rates are higher in Black and Latino communities, algorithms weighted toward criminal history embed those disparities into an automated score.15United States Courts. Determining Racial Equity in Pretrial Risk Assessment Some jurisdictions that adopted these tools have since dropped them.
What began as a promise between neighbors in Anglo-Saxon England, written into statute at Westminster in 1275 and copied into the U.S. Constitution five centuries later, is still being rewritten. The underlying tension has not changed in a thousand years: how to balance a community’s safety against the principle that a person accused of a crime is not yet guilty of one.