Concurrent powers are governmental authorities that the federal government and state governments exercise at the same time, over the same people, within the same territory. Taxation is the clearest example: you pay income tax to the IRS and, in most states, to a state revenue department too. Neither level of government needs permission from the other to act in these shared areas, though federal law prevails when the two directly conflict. This shared authority is one of the defining features of American federalism, and it explains why you run into overlapping federal and state rules on everything from wages to pollution limits.
How Concurrent Powers Fit Into the Constitutional Structure
The Constitution never uses the phrase itself. The concept emerges from the way the document sorts authority into three groups: powers given only to the federal government, powers kept only by the states, and powers both share.
Powers Only the Federal Government Has
Article I, Section 8 lists specific powers granted to Congress. Some are exclusive by their nature or by an express bar on state action. Congress alone can coin money, declare war, raise a navy, establish post offices, grant patents and copyrights, and regulate commerce with foreign nations and among the states.1Congress.gov. Constitution Annotated – Article I, Section 8 Article I, Section 10 reinforces the exclusivity by barring states from entering treaties, coining money, granting titles of nobility, or passing laws that impair contracts.2Congress.gov. Constitution Annotated – Article I, Section 10, Clause 1 If only the federal government can do it, it isn’t concurrent.
Powers Only the States Have
The Tenth Amendment draws the other boundary. Any power not delegated to the federal government and not prohibited to the states belongs to the states or the people.3Congress.gov. Constitution of the United States – Tenth Amendment Establishing local governments, setting professional licensing requirements, running public schools, and administering elections all sit on the state side. Congress has no enumerated authority in these areas, so the states operate on their own.
The Overlap
Concurrent powers live between those two categories. The Constitution gives Congress the power to tax, but it never says states cannot also tax. Because the power to tax is not prohibited to the states, they keep it under the Tenth Amendment, and both governments exercise it at once.3Congress.gov. Constitution of the United States – Tenth Amendment The same logic covers borrowing money, building roads, establishing courts, and passing criminal laws. Both governments can act, and a federal law in the area does not automatically shut out state law.
Examples of Concurrent Powers
Taxation
Article I, Section 8 authorizes Congress to collect taxes, duties, and excises.1Congress.gov. Constitution Annotated – Article I, Section 8 States have always kept their own independent taxing power. The practical result shows up every April. You file a federal return with the IRS and, in states that impose an income tax, a separate state return as well. The two systems operate independently, with different rates, brackets, deductions, and enforcement agencies.
Court Systems
Article III vests federal judicial power in the Supreme Court and whatever lower courts Congress creates.4Congress.gov. Constitution of the United States – Article III Every state also maintains its own court system under state constitutional authority. The two run in parallel. Federal courts handle cases involving federal statutes, constitutional questions, and disputes between citizens of different states. State courts handle most everyday litigation: criminal cases, family law, contract disputes, personal injury. Both systems have jurisdiction over many of the same types of cases, and the plaintiff often chooses where to file.
Criminal Law
Congress and state legislatures both pass criminal statutes. Bank robbery, drug trafficking, fraud, and firearms offenses are all crimes under federal and state law. This overlap has a consequence that surprises many people: a single act can lead to prosecution by both governments. Since the 1920s, the Supreme Court has held that because each sovereign defines its own offenses under its own laws, separate prosecutions do not violate the Fifth Amendment’s protection against double jeopardy.5Legal Information Institute. Dual Sovereignty Doctrine The Court reaffirmed this in Gamble v. United States (2019), reasoning that “where there are two sovereigns, there are two laws, and two ‘offences.'”6Supreme Court of the United States. Gamble v. United States, 587 U.S. ___ (2019)
Minimum Wage
Wage regulation is a textbook concurrent power. The federal Fair Labor Standards Act sets a floor: covered employers must pay at least $7.25 per hour.7U.S. Department of Labor. State Minimum Wage Laws States are free to set higher minimums, and roughly 30 do. When an employee is subject to both rates, the worker gets the higher one.8U.S. Department of Labor. Questions and Answers About the Minimum Wage A few states have no state minimum wage law at all, leaving the federal rate as the only floor. The actual minimum a worker earns depends on where they live.
Environmental Regulation
Federal environmental statutes such as the Clean Air Act set national baseline standards, but they preserve the right of states to adopt stricter rules. The Clean Air Act provides that nothing in the statute prevents a state from enforcing its own emission standards, so long as those standards are not weaker than the federal floor.9Congress.gov. Cooperative Federalism and the Clean Air Act Several states have used this authority to impose air quality requirements well beyond federal minimums. Businesses operating in multiple states often face different emission limits depending on location.
Banking
The United States has what regulators call a “dual banking system.” A bank can obtain a federal charter from the Office of the Comptroller of the Currency or a state charter from a state banking agency. Federally chartered banks operate under federal law and federal oversight. State-chartered banks operate under state law and state regulators.10Office of the Comptroller of the Currency. National Banks and the Dual Banking System Both systems exist at the same time, giving financial institutions a genuine choice of regulatory framework. That is concurrent power in structural form: two governments, two parallel regulatory regimes, one industry, one territory.
Borrowing and Building Infrastructure
Both the federal government and the states borrow money by issuing bonds, and both build and maintain infrastructure. The interstate highway system is funded through a combination of federal fuel taxes and state appropriations. Bridges, water systems, and public transit projects routinely involve funding and oversight from both levels. Neither government has a monopoly on public debt or road-building.
What Happens When Federal and State Laws Conflict
Shared authority works smoothly when the two governments set compatible rules. The harder question is what happens when they contradict each other. The answer comes from Article VI, Clause 2, the Supremacy Clause, which makes the Constitution and federal laws made under it the “supreme Law of the Land” and binds state judges to follow them regardless of anything in state law to the contrary.11Constitution Annotated. Constitution Annotated – Article VI, Clause 2 When a valid federal law and a state law directly conflict, the federal law wins.
Courts apply this through three categories of preemption. Express preemption occurs when Congress includes language in a statute stating that federal law overrides state law on a subject. Field preemption applies when federal regulation of an area is so thorough that Congress is understood to have left no room for state rules, even without saying so explicitly. Conflict preemption applies when complying with both laws at once is impossible or when the state law stands as an obstacle to federal goals.12Congress.gov. Federal Preemption: A Legal Primer Immigration law and nuclear safety are areas where courts have found broad federal preemption. Environmental law and labor law tend to allow states significant room to go beyond federal standards.
Preemption does not mean federal law always displaces state law in concurrent areas. It means it can, if Congress chooses to act and the resulting federal law validly conflicts with state law. In many concurrent areas, federal law deliberately sets a floor rather than a ceiling, inviting states to build on top. The minimum wage and clean air examples above follow that pattern.
Why This Matters in Everyday Life
If you have ever wondered why you deal with two tax systems, why federal and state drug laws sometimes point in different directions, or why your state’s minimum wage differs from the federal rate, concurrent powers are the reason. The framers could have given all lawmaking authority to one government. They chose a system where both levels operate at the same time in many areas. That design creates complexity, but it also lets states tailor policies to local conditions while the federal government maintains national baselines. The tradeoff is that you sometimes face overlapping, and occasionally conflicting, obligations from two governments that both have legitimate authority over the same aspects of your life.