Theory & knowledge test guide · 2026
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How to pass the driver theory test in Ireland

The driver theory test (DTT) is the first step to an Irish driving licence: you need a pass before you can apply for a learner permit. It is run for the Road Safety Authority (RSA). The pass mark is high, so preparation matters.

What is on the test

  • 40 multiple-choice questions for a car (category B).
  • Pass mark: 35 out of 40 (87.5%). You can get only 5 wrong.
  • 45 minutes to answer all 40.
  • Questions come from the official RSA question bank and cover the Rules of the Road, road signs, risk perception and safe driving.
  • The test is in English, or in Irish if you choose the Irish category name when you book.
  • A pass is valid for 2 years.

A study plan that works

  1. Read the Rules of the Road (free from the RSA) and use the official RSA revision material.
  2. Learn the signs: Irish warning signs are yellow diamonds, and speed limits are in km/h. Study each sign on the Ireland road signs tab.
  3. Take a full 40-question mock test early. The free Irish mock tests on PassDriveTest use the same length and pass mark.
  4. Review every wrong answer. With only 5 mistakes allowed, a weak topic can fail you.
  5. Aim for 38 or more on several different mock tests before you book.

Topics that catch people out

  • Default speed limits: 120 km/h on motorways, 100 km/h on national roads, 80 km/h on regional roads, 60 km/h on rural local roads (since February 2025) and 50 km/h in built-up areas.
  • Learner and novice rules: L and N plates, the lower drink-drive limit (20 mg per 100 ml of blood), and disqualification at 7 penalty points.
  • Roundabouts and yellow box junctions.
  • Stopping distances and the two-second rule, doubled in the wet.
  • Vulnerable road users: pedestrians, cyclists, motorcyclists and horse riders.

After you pass

Apply for your first learner permit through the NDLS within the 2 years. Then complete 12 Essential Driver Training (EDT) lessons and hold the permit for at least 6 months before the driving test.

Next: how to book the theory test, or take a free Irish mock test.

Checked against official sources on 17 October 2026.