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Compromise on the Importation of Slaves in AP US Government

The Compromise on the Importation of Slaves was a 1787 Constitutional Convention agreement that blocked Congress from banning the importation of enslaved people before 1808. Southern delegates, especially from South Carolina and Georgia, would not support a Constitution that let the new national government end the Atlantic slave trade right away. The framers postponed the question for about twenty years instead of settling it.

This definition is part of Fiveable's AP US Government review, which also has guided practice questions.

Verified for the 2027 AP US Government exam•Last updated November 2026•Fiveable Content Team

The 1808 date didn't ban anything by itself

A lot of people read this compromise as "the Constitution ended the slave trade in 1808." It didn't. The clause only said Congress could not prohibit importation before 1808. Nothing in it required a ban once that year arrived.

The actual ban came from ordinary legislation. Congress passed a law in 1807 prohibiting the importation of enslaved people, and it took effect on January 1, 1808, the first day the Constitution allowed. So the compromise set a waiting period, and a later Congress chose to act when it ended.

The clause also never touched slavery itself or the buying and selling of enslaved people within and between states. Slavery kept expanding inside the country after 1808. That's why this compromise counts as evidence of an issue the framers left unresolved.

Reading Article I, Section 9 without the word "slave"

The compromise is written into Article I, Section 9, the list of things Congress cannot do. The text refers to "the Migration or Importation of such Persons as any of the States now existing shall think proper to admit." The framers avoided the word "slave" entirely, so a multiple-choice text stimulus may quote this language and expect you to recognize what it describes.

The same clause let Congress place a tax on each imported person, capped at ten dollars. Article V then shielded this clause from amendment before 1808, so the deal couldn't be undone early through the amendment process.

Delegates from New England went along partly because Deep South states agreed to drop a demand for a two-thirds vote on commercial laws. It was a trade between regional interests, which is exactly the kind of bargaining the course wants you to explain.

One of the five deals Topic 1.5 asks you to explain

Writing a delay on banning the slave trade into the Constitution is one of five deals the course treats as necessary for ratification. That places this term in Unit 1: Foundations of American Democracy, under Topic 1.5: Ratification of the U.S. Constitution, where the objective asks you to explain how negotiation and compromise at the Convention shaped the constitutional system. The five compromises are:

  • the Great (Connecticut) Compromise on representation in Congress
  • the Electoral College as the method for choosing the president
  • the Three-Fifths Compromise on counting enslaved people
  • delaying any decision on banning the importation of enslaved persons until 1808
  • promising a Bill of Rights to answer Anti-Federalist concerns

The bigger argument in 1.5 is that winning ratification meant leaving some matters unsettled. The 1808 clause is one of the plainest examples, since the framers literally wrote a delay into the document. Slavery's place in a government built on liberty went unresolved, and the conflict outlasted the Convention by decades.

Counting versus timing: keeping it apart from Three-Fifths

Both deals involve slavery and both came out of the same summer, so they get swapped on multiple-choice answers. The fastest way to separate them is to ask what each one decided.

The Three-Fifths Compromise is about counting. It set the formula for including enslaved people in a state's population for House representation and for direct taxes. The importation compromise is about timing. It set the earliest year Congress could ban the import of enslaved people.

If a stem mentions population, seats in the House, or taxation based on population, the answer is Three-Fifths. If it mentions a twenty-year window, the slave trade, or 1808, it's the importation compromise.

Using the 1808 clause in multiple choice and the Argument Essay

A standalone question might describe a Convention conflict over the slave trade and ask which compromise resolved it. A text-based stimulus might instead quote the Article I, Section 9 language and ask what it allowed or why delegates accepted it. Those are the two main ways this term shows up in the multiple-choice section.

In Question 4 (Argument Essay), the clause works as specific evidence from the Constitution when a prompt asks whether the framers prioritized ratification over principle, or whether the Constitution left major issues unsettled. A strong answer names the 1808 deadline, explains that it kept Southern states committed to the Constitution, and connects that to the course claim that compromise left some questions open. A good rebuttal might acknowledge that the delay allowed Congress to ban importation in 1808, then argue that slavery itself stayed protected.

Where this sits in AP® Gov

Keep studying AP® Gov Unit 1