Guide7 min read7 views
Updated 6 November 2026 · Written by the Wahanaya.lk team
You get a VET certificate by driving to an authorised Drive Green or Laugfs Eco Sri testing centre with your CR book (or VIC) and current revenue licence; if your car passes, you get a certificate valid for 12 months that you must show when renewing your revenue licence.
A Vehicle Emission Test (VET) certificate is proof that your vehicle's exhaust passed Sri Lanka's air pollution limits. The Department of Motor Traffic (DMT) will not renew the annual revenue licence for most petrol, diesel, hybrid, three-wheeler or motorcycle vehicles unless you show a valid VET certificate from an authorised testing centre.
The programme is run by two authorised operators, Drive Green (CleanCo Lanka Ltd) and Laugfs Eco Sri, under the Vehicular Emission Testing Trust Fund. It has existed since 2003 under the National Environmental Act, and it applies islandwide, so you can test at any centre run by either company, no matter where your vehicle is registered.
Almost all petrol, diesel, hybrid, three-wheeler and motorcycle vehicles need a current VET certificate before the DMT or a Divisional Secretariat will renew the revenue licence. Hybrids are tested on the same schedule as their engine's fuel type (petrol or diesel) — they are not treated as exempt the way full EVs are.
Fully battery-electric vehicles (BEVs) are exempt from the whole programme, because they have no tailpipe emissions. If you own an EV, you skip the testing centre entirely and go straight to renewing your revenue licence with your NIC and CR book.
You can test at any authorised centre run by Drive Green or Laugfs Eco Sri, and there's no need to use a centre near where the vehicle was first registered. Drive Green also runs mobile and semi-fixed testing units in some areas, so check their website for the list closest to you, whether you're in Colombo, Kandy, Galle, Kurunegala or elsewhere. Laugfs Eco Sri lets you book a slot online through its booking portal, which can save you time on a queue.
If you've just bought a used car and aren't sure whether it's due for testing, check the existing VET certificate's expiry date against your revenue licence renewal date on the price-check page's related guides, or ask the seller for the latest certificate before you commit, as outlined in our safety tips.
You need the original Certificate of Registration (CR book) or Vehicle Identity Card (VIC), plus your current or soon-to-expire revenue licence. If your vehicle is still under a lease or hire purchase, the finance company usually keeps the original CR book, so you'll need a certified copy from them instead — ask your leasing officer for this well ahead of your renewal date, since getting the copy can take a few days.
You don't need your own insurance certificate for the emission test itself, but you will need it afterwards when you go to renew the revenue licence.
Run your engine for around 10 to 25 minutes before you arrive, so it's at normal operating temperature — a cold engine can give an inaccurate, failing reading. Make sure your chassis and engine numbers are clean and legible, since testers need to check them against your CR book. Your silencer/exhaust system should be intact, with no major oil or water leaks, a good fan belt, and a properly sealed fuel cap. If your "check engine" light is on, get it looked at before testing, since an active fault code often means a failed result.
Petrol and hybrid vehicles are measured for carbon monoxide (CO) and hydrocarbon (HC) levels, once at idle and once at 2,500 RPM. Diesel vehicles are measured for smoke opacity under hard acceleration. The whole process usually takes a short while once you're at the front of the queue, and if your vehicle passes, the centre prints your VET certificate on the spot.
Fees are set per vehicle class — motorcycles and three-wheelers pay less than cars, and cars pay less than vans, lorries or buses. These fees have been revised more than once in recent years and can change again, so confirm the exact current amount directly with Drive Green or Laugfs Eco Sri, or check their published price list, before you go, as of November 2026 (source: induwara.lk emission test fee calculator, cross-checked against Drive Green's published rates). Don't rely on an old fee you remember from a previous renewal.
If your vehicle fails, the centre will tell you which reading was out of range (CO, HC, or smoke opacity). You're entitled to two free retests within 60 days of the first test, so you can get the fault fixed — a service, a new air filter, an exhaust repair, or an engine tune — and come back without paying again. If you miss the 60-day window or use up both free retests, you'll need to pay the standard test fee again for any further attempt.
Common reasons vehicles fail include a dirty air filter, worn spark plugs, an aging catalytic converter, incorrect fuel-air mixture, or a diesel engine that's overdue for an injector service. If you're buying a used vehicle and its latest VET certificate shows it barely passed, it's worth budgeting for some engine work soon after you buy — something to factor into your offer when you compare prices on similar vehicles.
Once you have your VET certificate, you take it along with your previous revenue licence and valid insurance certificate to renew at a Divisional Secretariat, DMT office, or through the e-Revenue Licence (eRL) online portal. Under the current eRL framework, you can renew at any Divisional Secretariat islandwide, not just where the vehicle is registered. Plan to get your emission test done within about 30 days before your revenue licence expires, since the VET certificate needs to still be valid on the day you apply to renew.
If you're leasing the vehicle, remember the finance company may hold your original CR book, so coordinate with them early to get the certified copy you'll need both for the emission test and the licence renewal.
If you're shopping for a vehicle and want to check its emission and documentation history before you commit, browse listings on /vehicles, check a fair price on /price-check, or work out monthly costs on our leasing calculator. You can also list your own vehicle on /post-ad, or ask other owners about their experience with testing centres and fees on the Wahanaya forum.
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