The Iowa knowledge (permit) test

By the end of this topic you can

• You can choose between the three ways to take the test.
• You can explain the rules for taking the test at home.
• You can describe the pass score you should aim for.
• You can name the main manual chapters the test covers.
• You can use the official practice test to check you are ready.

What you need to know and understand

• The test is multiple choice and based on the Iowa Driver's License Manual.
• Iowa DOT's practice test uses 25 questions and a passing score of 80 percent.
• You can test at a DMV, a county treasurer's office, at home or at a participating school.
• To apply for home testing, the student must be at least 14 years old.
• The home test must be supervised by a parent or guardian with a valid Iowa driver's license.
• A home test needs a computer, not a phone or tablet.
• After passing anywhere other than a DMV, you still visit a DMV or county treasurer to be issued the permit.

Three ways to sit the test

Whichever route you choose, you get your results by email or on screen, then make an appointment to have the permit issued, pass the vision screening and pay the fee.

• At a DMV or county treasurer's office: book an appointment or contact your county treasurer.
• At home: your parent applies online to proctor the test, and Iowa DOT emails a link once approved (allow 7 to 14 days). The link expires after 72 hours.
• At school: many Iowa schools and agencies take part in the Skip the Trip program and run the test on site.

What the questions cover

Questions come from the whole manual, so study every chapter rather than just the sign pages. Iowa-specific topics are worth extra attention because they differ from other states.

• Sign colors and shapes, signals, pavement markings and work zones.
• Right of way, school buses, emergency vehicles and the Move Over or Slow Down law.
• Speed limits that apply when none is posted, following distance and stopping distance.
• Seat belts, child restraints, phone laws and drunk or drugged driving.
• Rural and gravel road driving, deer, snowplows, roundabouts and newer designs such as reduced-conflict intersections.

Getting test ready

Iowa DOT does not publish the exact number of questions on the real test on its permit pages, and retake rules can change, so ask the DMV or your county treasurer when you book. Our deeper permit test guide and free Iowa practice test add more question practice.

1. Read the current Iowa Driver's License Manual from start to finish.
2. Take Iowa DOT's free practice test. Each attempt draws a fresh set of 25 questions.
3. Note every question you miss and reread that manual section.
4. Book the real test only when you score 80 percent or more several times in a row.

Common mistakes

• Taking the home test on a phone. Iowa DOT requires a computer or similar device, not a phone or tablet.
• Letting the home test link expire. It only works for 72 hours after the email arrives.
• Studying only road signs. The test covers laws, safety and Iowa-specific rules too.
• Assuming a home pass is the permit. You must still go in to be issued the permit.

Test yourself: The Iowa knowledge (permit) test

Answer each question, then read the explanation. Questions come in a random order each time.

Go deeper

• Iowa Permit Test
• Iowa Permit Practice Test
• Learning to Drive in Iowa