Why Do Supreme Court Justices Serve for Life?

Updated: Apr. 18, 2024

It's a question many have about the U.S.'s highest court—and the rationale dates back to America's founding.

There’s a lot of attention on the Supreme Court lately, with President Joe Biden nominating Ketanji Brown Jackson to succeed retiring Justice Stephen Breyer. If confirmed, Judge Jackson will be the first Black woman to sit on America’s highest court. It’s an exciting—and historic—time for the Supreme Court, and as such, you may be curious about its history and rules.

In addition to questions like “How many justices are on the Supreme Court?” and “Why do justices wear black robes?”, you may also wonder, “Why do Supreme Court justices serve for life?” Turns out, our founding fathers had a very good reason for it. Read on to learn why Supreme Court justices serve for life, and what those lifetime appointments entail.

Lifetime appointment flows from the Constitution

The idea of lifetime appointment comes from Article III of the U.S. Constitution, explains Burt Neuborne, Norman Dorsen Professor of Civil Liberties and founding Legal Director of NYU Law School’s Brennan Center for Justice. Article III established the judicial branch of the U.S. government by vesting the judicial power of the United States in “one supreme Court” and any lower courts Congress decides to establish over the course of time.

In other words, the U.S. Supreme Court is the highest court and ultimate authority for deciding all controversies arising under U.S. law, including controversies regarding the constitutional validity of existing laws, both state and federal. Although Article III leaves it to Congress to decide how to organize and staff its courts, it does specify that its judges “shall hold their office during good behavior.”

The meaning of “good behavior” for a Supreme Court justice

The meaning of “good behavior” has long been debated. Some suggest it refers to the opposite of “high crimes and misdemeanors” (behavior that can give rise to the impeachment of a federal officeholder). “All federal judges, including Supreme Court justices, can be removed through impeachment,” explains Nora V. Demleitner, Roy L. Steinheimer Jr. Professor of Law at Washington and Lee University, “and the standard is set forth in Article III as good behavior.”

Only one Supreme Court justice has ever been impeached. In 1804, Samuel Chase, who had been appointed by President George Washington, was impeached by the House of Representatives for his allegedly partisan rulings. However, the Senate failed to convict him, and Chase served until his death in 1811. When it comes to the executive branch, here are the things people get wrong about impeachment.

Other Supreme Court justices have also been targeted for impeachment, albeit unsuccessfully. That includes Chief Justice Earl Warren, who was appointed in 1953 under Republican President Dwight D. Eisenhower. Warren came to disappoint the Republican party with decisions such as 1954’s Brown v. Board of Education of Topeka (putting an end to segregation in schools), but the resulting “Impeach Earl Warren” movement failed to gain steam.

What “good behavior” cannot mean is “right” versus “wrong” decisions, Neuborne points out. Why? This “would defeat the reason for having lifetime tenure,” which is the goal of shielding federal judges from outside pressure.

Why do Supreme Court justices have to serve for life?

The pressure Neuborne is referring to includes political pressure and popular opinion. “The framers believed it important to separate the legislative, executive, and judicial powers of government, and they believed it was particularly important to create a judiciary that would be independent of popular opinion,” according to Ryan Vacca, Professor of Law at the University of New Hampshire School of Law. “If they had to be reappointed or reelected,” suggests Michael R. Dimino Sr., Professor of Law at Widener University Commonwealth Law School, “they would have to worry that unpopular decisions could cost them their jobs.”

Can Supreme Court justices retire?

“A lifetime appointment does not require that a justice serves till death,” points out Demleitner. “A host of Supreme Court justices chose to retire over the years.” Chief Justice Warren retired voluntarily in 1969. Other retirements include Sandra Day O’Connor, John Paul Stevens, David Souter, and most recently, Stephen Breyer. Other countries impose term limits and/or mandatory retirement ages. Although constitutionally these options are not available in the United States, Demleitner argues that longer life expectancy (compared with the late 18th century) may lead to an increase in voluntary retirements in the future.

What’s at stake because of lifetime appointments

In addition to life expectancies increasing since the drafting of the Constitution, the age at which judges are appointed to the Supreme Court has been decreasing in recent years, with John Roberts and Elena Kagan appointed at 50, Clarence Thomas at 43, Stephen Breyer, Sonia Sotomayor, and Samuel Alito at 55, Neil Gorsuch at 49, Brett Kavanaugh at 53, and Amy Coney Barrett at 48. As a result, someone appointed to the Supreme Court today might reasonably be expected to still be sitting on the bench in two, three, or even four decades. If Supreme Court nominations have become increasingly acrimonious in recent years, which Demleitner suggests, the potential length of lifetime tenure may be a factor.

The appointment imperative

The president is vested with the power to nominate Supreme Court justices, subject to the advice and consent of the U.S. Senate. However, Article III says nothing about the number of justices that must be active at any given time, points out Neuborne.

The first Judiciary Act, passed in 1789, provided that the Supreme Court was to consist of six justices: a “chief justice” and five “associate justices.” Historically, the number of active Supreme Court justices has run the gamut, with Congress having amended the number six times. “We started with six, went down to five in 1801, back to six in 1802, and then added more justices as the country expanded,” Neuborne says. “During the Civil War, we went briefly to 10, but quickly back to 9, where it has remained.”

Next, learn another 50 fascinating facts about America that most Americans don’t know.