ACS for first-time candidates
Take your first ACS assessment with a clear route and price.
Initial assessment packages for newly trained engineers and candidates adding their first gas categories. VAT and certification are included.
- Practical assessment
- Theory assessment
- Certification included
Which assessment do you need?
Start with your ACS history.
Choose initial assessment
You are taking ACS for the first time, completing your initial training, or adding your first gas categories.
Already held ACS?
If you have completed ACS before and your certificate expired no more than 12 months ago, use the reassessment route.
View reassessment prices →What the assessment covers
Your recognised route to Gas Safe registration.
ACS is the nationally accredited certification scheme used to assess and certify gas-safety competence in specified categories. Successful certification supports an application to Gas Safe Register. ACS certification alone does not authorise somebody to undertake gas work where Gas Safe registration is legally required.
Choose your categories
Select the domestic gas categories that match the work you intend to undertake.
Complete the assessment
Your route includes practical and theory-based testing over the stated duration.
Apply for Gas Safe
After passing, you can apply for Gas Safe registration in your approved categories. ACS is typically valid for five years.
Entry requirements
Initial ACS is not an open-entry course.
Candidates must provide evidence of an accepted training and experience route and meet the relevant ACS prerequisites before assessment. We will review eligibility evidence before confirming a booking.
Additional appliances
Add categories after your boilers-only MLP.
For engineers who completed a boilers-only MLP and have now been qualified for 12 months. Prices include VAT and certification but not training.
1 day
Add cookers
Assessment only for candidates adding cookers to their qualifications.
1 day
Add fires
Assessment only for candidates adding fires to their qualifications.
2 days
Add cookers and fires
Assessment only for candidates adding both appliance categories.
Before assessment
Additional appliance training
One-to-one training is available before you take an additional appliance assessment.
Not sure which categories to book?
Tell us about your training and experience.
We’ll help you identify the appropriate assessment route before you book.