- Contractors listed
- 16,370
- Matched on WSIB's 2025 public business list
- 3,952
- Match rate, all trades
- 24.1%
- Highest match rate: Electricians
- 46.4%
Match rate by trade
A match means ProScore found the business on WSIB's 2025 public business list (WSIB's own open data) by business name and city, exactly or closely. A corporate group's legal name or account also counts, as does a match confirmed with other evidence when the business joined ProScore.
| Trade | Listed | Matched | Match rate |
|---|---|---|---|
| General contractors | 2,376 | 510 | 21.5% |
| Kitchen renovators | 2,164 | 210 | 9.7% |
| Landscapers | 2,048 | 408 | 19.9% |
| Electricians | 2,007 | 931 | 46.4% |
| Plumbers | 2,001 | 582 | 29.1% |
| Roofers | 1,454 | 364 | 25.0% |
| Heating & cooling (HVAC) | 1,351 | 410 | 30.3% |
| Tree services | 1,323 | 279 | 21.1% |
| Pest control | 747 | 75 | 10.0% |
| Bathroom renovators | 588 | 102 | 17.3% |
| Drywallers | 311 | 81 | 26.0% |
| All trades | 16,370 | 3,952 | 24.1% |
What to do before work starts
Ask the contractor for a current WSIB clearance certificate. For more, see WSIB's clearances page.
Questions
How many Ontario contractors are registered with WSIB?
ProScore cannot give an exact figure. What it can say is that 3,952 of the 16,370 contractors it lists (24.1%) match a business on WSIB's 2025 public business list by name and city, as of October 29, 2026. The number registered may be higher than this, because some registered businesses cannot be matched.
If a contractor has no match, does that mean they have no WSIB account?
No. The public list has no phone number or website to match on, a business may register under a legal name ProScore does not hold, and whether a business must register depends on its industry and structure. A missing match is a reason to ask, not proof of anything.
Which trades match most and least often?
Most often: Electricians (931 of 2,007), at 46.4%. Least often: Kitchen renovators (210 of 2,164), at 9.7%.
Why is there no figure for my city?
Because a city-level rate would mostly measure spelling. Matching depends on the city being written the same way on the WSIB list and on the listing, and it often is not, especially for amalgamated places. Trade-level rates mix all cities, which is one more reason to read them as a lower bound.
How do I check a contractor before work starts?
Ask the contractor for a current WSIB clearance certificate. WSIB has a page on clearances on its website.
About this data
The population is every contractor ProScore lists publicly: 16,370 home-service businesses in Ontario across 11 trades, counted on October 29, 2026. Listings that are retired, no longer operating or still being checked are not included. No figure on this page names or identifies a business. The database changes daily, so a later count will differ slightly; cite the date.
When each input was collected: Google data for 15,596 of the 16,370 listings (13,069 of them with a Google rating) comes from a one-time import made between February 10, 2026 and March 6, 2026 and has not been refreshed since; 723 listings were refreshed from Google between July 4, 2026 and October 29, 2026. Licence statuses come from the regulators' registers; the latest pulls were October 4, 2026 (ESA), October 13, 2026 (TSSA) and October 2, 2026 (HCRA), and some licences were last read earlier. WSIB matches use WSIB's 2025 public business list.
Trust scores are ProScore's own assessment (the ProScore Trust Index), not a regulator's finding. A listing without enough evidence to score is shown as not yet rated, which is not a low score.
This is a data update, not a new edition of the annual report, The ProScore Ontario Contractor Trust Index 2026 (August 12, 2026). That report used the data and the scoring rules of its own date, so its figures are not directly comparable with these.
Free to cite with attribution to ProScore. For a specific cut, the underlying queries or comment, contact press@proscore.ca.