DIY PAT Testing vs Professional Testing: Which Should You Choose?

DIY PAT Testing vs Professional Testing

You can buy a basic PAT tester for £100-300 and test your own equipment. But should you? Here is an honest comparison of DIY versus professional PAT testing to help you decide which approach is right for your business.

DIY PAT Testing

Pros:

• Lower ongoing cost if you have many appliances and test frequently
• Test on your own schedule
• Immediate testing of new equipment without waiting for a visit

Cons:

• Upfront cost of the tester (£100-300 for a basic unit, £500+ for a comprehensive one)
• You need training — the City & Guilds 2377 course costs £150-300 and takes 1 day
• You need to calibrate the tester annually (£30-80)
• You may miss faults that a trained eye would catch on visual inspection
• Your documentation may not satisfy insurers or inspectors if it is not comprehensive
• Time spent testing is time not spent running your business
• If something goes wrong, you carry the liability — no professional indemnity cover

Professional PAT Testing

Pros:

• No upfront equipment costs
• Experienced tester who has seen thousands of appliances and can spot unusual faults
• Comprehensive documentation that satisfies insurers and inspectors
• Professional indemnity insurance — the testing company carries liability
• Calibrated equipment with current certificates
• No time taken away from your business

Cons:

• Ongoing cost per test
• Need to arrange access and schedule visits
• Cannot test new equipment immediately

When DIY Makes Sense

DIY testing may make sense if you have a large number of appliances (200+), test frequently (quarterly or more), and have a designated, trained person with time to do it properly. Some construction companies and large facilities management operations take this approach.

When Professional Makes Sense

For most small to medium businesses with under 200 appliances testing annually, professional testing is more cost-effective and lower risk. You get expert eyes, proper documentation, insurance cover, and no training or calibration hassle. At typical rates of £1-2 per appliance, the annual cost is modest.

Our Recommendation

At Green Tag PAT, we obviously provide professional testing — but we are honest about when DIY might suit better. Contact us to discuss your specific situation and we will give you straightforward advice.