Quick Answer COIDA for Construction Companies: What Contractors Must Know Construction companies must register with the Compensation Fund like all employers – but pay higher tariffs because injury risk is higher, and cannot get onto most sites without a current Letter of Good Standing. Principal contractors can be held liable for uninsured subcontractors’ workers. What this means in plain language In construction, COIDA is checked constantly: tenders demand the letter, site agents demand it again at the gate, and principal contractors verify subcontractors because an uninsured subbie’s injured worker can become the principal’s problem. Your tariff depends on your declared work class – roofing differs from painting. Declare honestly: a…