Quick Answer What Happens If I Don't Submit My COIDA Return of Earnings? If you skip the COIDA Return of Earnings, the Compensation Fund estimates your assessment (usually upward), adds a 10% late penalty, and blocks your Letter of Good Standing – which kills tenders. Worst of all, a workplace injury while non-compliant leaves you personally liable for compensation. What this means in plain language The Fund does not chase you gently. An unfiled return triggers an estimated assessment based on what they think you owe – and estimates are rarely kind. The hidden cost is the Letter of Good Standing: no current return and payment, no letter. Construction sites,…