NCT Retest: Fees, Time Limits and What Happens If You Fail

Understanding your NCT result

Every defect found on the test is graded. The grade decides whether you passed and what happens next.

• Minor: the car passes, but the faults listed should be repaired. You do not need to go back.
• Major: the car has failed. You have 30 days to get it repaired and back to the centre for re-inspection.
• Dangerous: the car has failed and a "Failed Dangerous" sticker is applied. It is illegal to drive a vehicle with a dangerous defect, so the car should go to the garage on a recovery truck or the defect must be repaired before it moves.

Read the failure report carefully. Each item has a code and description, and that is exactly what the tester will look at on the retest. Give a copy to your mechanic rather than describing the problem from memory.

When is the NCT retest free?

NCTS does not charge for retests that do not need test equipment. Its own example is a windscreen wiper that has been replaced. As a rule of thumb:

• Usually free (visual check only): wiper blades, a blown bulb, a number plate, a missing washer jet, a cracked mirror, a loose trim item.
• €40 retest (needs equipment): brakes, emissions, headlamp aim, suspension or steering checks, wheel alignment and anything that needs the car on the lift or rollers.

If your report has a mix of both, you pay the €40. The free visual retest is one of the best reasons to return to the same test centre, so ask about it when you book.

The 21-day and 30-day deadlines

These two dates catch out more drivers than any defect.

1. Book within 21 days of the original test. Retests are booked through the NCTS website or by phone, the same way as a full test.
2. Complete within 30 days of the original test. If the retest happens on day 31, it is treated as a new full test at €60.

Count from the date on your report, not from when you got the car to the garage. If a part is on back order, book a provisional retest slot inside the window and move it if you have to, keeping in mind the €16 late cancellation charge if you give less than five working days' notice.

Does a retest change my NCT due date?

No. Your certificate runs for one or two years (depending on the age of the car) from its due date, not from the day you passed the retest. Failing and passing later does not buy you extra time, and leaving the test until the last minute just shortens how long your new certificate effectively lasts.

Can I drive the car after failing?

If the car has a dangerous defect, no. Gardaí can issue penalty points or bring a prosecution if they stop a car with a dangerous fault.

For a major fail, the position depends on your old certificate. If it is still in date, it generally remains valid until its expiry date. If it has already expired, the car has no valid NCT until it passes, and driving without one carries a fixed charge and penalty points. In practice, keep journeys to the garage and the test centre, and carry your test report and retest booking with you.

If you cannot bring the car yourself, someone else can bring it for the retest. Our guide on whether someone else can bring your car for the NCT explains what they need.

How to pass the retest first time

• Fix everything on the report, not just the headline item. The tester rechecks every failed item.
• Keep receipts and old parts from the repair. They help if a result is disputed.
• Check the easy things the day before: all bulbs, wipers, washer fluid, tyre tread and warning lights. A new fault spotted on the retest can mean another visit.
• Clear the boot and footwells so the tester can get to what they need.
• Bring the same documents as the first test, including the log book. If you cannot find it, see our lost log book guide.

If you disagree with the result

Raise it with the person in charge of the test centre before you leave. If that does not resolve it, NCTS has a formal appeals process, with details on ncts.ie. If the dispute is about whether a defect exists at all, hold off on repairs until the appeal is dealt with.

Common questions

How much is the NCT retest?

€40 if test equipment is needed, and free if the retest is a visual check only. A full test is €60.

How long do I have to do the NCT retest?

Book it within 21 days and complete it within 30 days of the original test. After 30 days you need a full test again.

Do I need to book an NCT retest?

Yes. Retests are booked in the same way as a full test, online or by phone.

Can I get the retest done at a different centre?

The simplest option is to return to the centre that tested the car, especially if you are hoping for a free visual retest. If you need a different centre, confirm the fee with NCTS when booking.

What happens if I fail the retest?

You receive a new report. Repair the remaining items and book again. If you are outside the 30-day window by then, it becomes a full test.

Find your nearest centre in our list of NCT centres by county.

Fees and deadlines are from the NCTS and Citizens Information as of October 2026.