The STK: Czech vehicle inspection, 4 years then every 2, and what fails

Czech drivers think about the STK the way other people think about a dentist: not often, then all at once, and with a vague promise to do better next time. The letters stand for stanice technické kontroly, the stations where cars are inspected for roadworthiness. The sticker on the rear plate is the proof, and for a newcomer it is the first Czech obligation tied to a car, not to a driver.

The inspection regime is set by law and by the Ministry of Transport; intervals, grades and fines can be amended, so check the current rules before you rely on a date.

The schedule for passenger cars

For an ordinary passenger car, the rule of thumb is simple. A new car is exempt from periodic inspection for its first four years after first registration. The first inspection falls due in the month four years after that registration, and from then on a car is inspected every two years (as of 2026; check the Ministry of Transport). Other vehicle categories, such as motorcycles, vans, lorries and taxis, follow different intervals, and older or special-use vehicles may have more frequent checks.

A car bought used keeps the schedule it already has, based on the original registration date, not the date of your purchase. The registration certificate and the sticker show when the next inspection is due. A car imported from abroad gets a registration check and a technical inspection when it is first registered in Czechia; see how to register a car in Czechia.

What the inspection covers

At the station, inspectors check the vehicle against a defined checklist. The main areas are identity (that the VIN and the plates match the papers), brakes, steering and suspension, lights and electrical equipment, tyres and wheels, bodywork and structural integrity, exhaust and noise, visibility, safety equipment such as seat belts, and the general condition of fluid systems. The inspector looks at the car on a lift and on a test line, and uses instruments, not just a visual check.

The measurement of emissions is a separate procedure that is normally done at the same visit. For modern cars the station reads the on-board diagnostics and checks the exhaust against the standard for the engine type; older cars are measured directly. Cars with defects in the emissions system will fail. If your car warns you with an engine light before the visit, fix the cause first.

The station checks the car, not your driving. It is not a test of the car's age or value, and an old car in good order can pass. A new car with a damaged component can fail.

Defects and results

Faults found are graded by seriousness. The grading in the Czech system runs in three levels.

• Minor defects (A): the vehicle is roadworthy; the owner is told to repair them.
• Serious defects (B): the vehicle is not considered safe in some respects; the result is "temporarily fit", and the car must be repaired and shown again, generally within 30 days.
• Dangerous defects (C): the vehicle is unfit and may not go back on the road until the defects are repaired; plan on having it towed or transported to the garage.

The outcome of the inspection is one of three results: fit, temporarily fit or unfit. A car with serious defects has to be repaired and shown again within the time limit, generally 30 days (as of 2026; check the Ministry of Transport). A car that is unfit may not be driven on public roads until repaired and re-inspected. Ask the station to explain the defects in plain terms, and ask for the protocol in writing. If you disagree with a finding, you can ask a second station or the supervisory authority; the station gives the procedure.

Booking, price and what to bring

Stations are privately operated under authorisation from the state, and are listed on the Ministry of Transport's pages and found in every large town. Prices are set by each station and differ by vehicle type, so compare, but do not choose purely on price: a station that explains its findings and gives clear results is worth a few crowns more. Booking online is common, and a few stations accept walk-ins. Expect a wait in the weeks around the end of the month and the end of the year.

Bring the registration certificate, your ID, and the previous inspection protocol if you have it. Wash the car and empty the boot, because the inspector needs access to the underside and the safety equipment. A hypothetical owner who arrives with a warning light on and a cracked windscreen can expect a failing result, and a second visit.

Do not leave it to the last day. The sticker on your rear plate shows the month and year; the inspection is due by the end of that month. Booking a few weeks ahead leaves room for a retest if something fails. Our guide to registering a car covers the first registration, which is a separate check.

What happens if the sticker lapses

Driving a car without a valid periodic inspection is an offence, and the owner is responsible for keeping the vehicle in a roadworthy state. The police can fine the driver or the owner, and the amount is set in law (as of 2026; check the current schedule). An expired inspection can also cause trouble with an insurer if the car is involved in an accident, because insurers treat roadworthiness as a condition. We do not give figures here, since fines and conditions change.

If your inspection is overdue, book at once. If the car is not roadworthy, ask the station what you can legally do with it, because driving it to the station may be tolerated while driving it elsewhere is not. Keep the new protocol and sticker with the car's papers.

A word on older cars and used purchases

Buying a used car, the STK date is the cheapest piece of due diligence on offer. A car with a long time left on the sticker has recently been checked, which tells you something, though not everything, because the inspection looks at safety and emissions and not at the engine's long-term health or the car's accident history. Ask the seller for the last protocol and compare the odometer reading with earlier ones. If the sticker is about to expire, treat the inspection as part of the price: either the seller takes the car through before the sale, or you reduce your offer for the risk of defects. For an older car, a station's candid list of what will need replacing in the next two years is useful reading.

Other checks and related costs

The STK is not the only recurring cost of car ownership. Compulsory third-party insurance, an electronic motorway vignette if you use motorways, parking in Prague's zones (see parking zones explained) and, if you use the car for business, the tax rules in our piece on company car taxation are the usual ones. Winter tyres are required from 1 November to 31 March when winter conditions exist or a sign applies, and inspectors check the tyres' condition. For the traffic rules a new driver should know, read driving in Prague.

Frequently asked questions

How often does a car need an STK inspection?

A new passenger car is first inspected four years after registration and then every two years (as of 2026; check the Ministry of Transport).

What happens if my car fails?

You get a protocol listing defects by grade A, B or C. For serious (B) defects you repair and return, generally within 30 days; with dangerous (C) defects the car may not be driven.

Is the emissions test separate?

It is a separate measurement, normally done at the same visit. Defects in the emissions system will fail the car.

What if my sticker has expired?

Driving without a valid inspection is an offence. Book at once and ask the station what you may legally do with the car meanwhile.

This is a general explainer, not legal or tax advice.