In Ontario, classifying a workplace flare-up as a “recurrence” of an old WSIB claim is often financially advantageous. It allows you to link the current pain to a previously accepted hazard, bypassing the need to prove a new accident. Your Loss of Earnings (LOE) will generally be based on your original earnings (adjusted for inflation) or your current wages, whichever is higher.
Workplace injuries rarely heal perfectly. Many injured workers in Ontario-from miners in Sudbury to autoworkers in Oshawa-return to their jobs only to experience severe flare-ups months or even years later. When this happens, a critical legal question arises: Is this a brand-new workplace accident, or is it a recurrence of your old injury? The way the Workplace Safety and Insurance Board (WSIB) classifies this event drastically impacts your benefits, your administrative burden, and your employer’s premium rates.
A “new injury” requires you to prove that a specific, new hazard at work caused the damage. A “recurrence” simply means your old injury has spontaneously worsened, making you unable to work. 📍 Usually, arguing for a recurrence is much safer for the worker, especially if you have moved to a lower-paying job since the original accident. Understanding this distinction is vital, and a WSIB lawyer can help ensure your file is classified correctly to maximize your financial protection.
Step-by-Step Guide to Managing a WSIB Recurrence in Ontario
If you wake up with severe pain related to an old workplace injury, or if a minor movement at work triggers your old symptoms, you must handle the paperwork carefully. Here is how to navigate the recurrence process.
Step 1: Identify the Trigger Event
First, analyze what caused the pain. If you were doing your normal, modified duties and your shoulder simply gave out, that is a recurrence. 🔍 However, if you slipped on a puddle of oil and smashed the same shoulder, the WSIB will classify that as a completely new traumatic accident.
Step 2: Visit Your Treating Physician Immediately
Go to your doctor and explicitly mention your old WSIB claim number. Your doctor must note that the current symptoms are anatomically linked to the original injury. They will submit a clinical update to the WSIB stating that you have suffered a medical deterioration related to the old file.
Step 3: Notify the WSIB (Avoid Filing a New Form 6)
If it is a true recurrence, you typically do not need to file a brand-new Worker’s Report of Injury (Form 6), which is used for new accidents. Instead, you contact your old Case Manager or submit a worker’s incident report referencing your old claim number. ☎️ Inform them that your previous injury has worsened and you need to reopen the file for further Loss of Earnings (LOE) and healthcare benefits.
Step 4: Review the Earnings Calculation
This is where the financial strategy comes in. If WSIB accepts the recurrence, they must determine your LOE rate. Under the Workplace Safety and Insurance Act, they will generally compare your pre-injury earnings from the original accident (adjusted for years of inflation) against your earnings at the exact time of the recurrence. They are legally obligated to pay you based on whichever amount is higher.
Step 5: Appeal an Incorrect Classification
Employers often fight recurrences because it hits their historical WSIB safety record. If the WSIB Adjudicator wrongly closes your old file and forces you to start a new claim (which might be denied because there was no “new” accident), you must file an Intent to Object (ITO) within six months to appeal the decision. ⚔️
New Injury vs. Recurrence: Financial Impacts
Understanding the difference is critical to protecting your livelihood. Here is a breakdown of how the classification changes your WSIB experience as of May 2026:
| Feature | New Injury Claim | Recurrence of Old Claim |
|---|---|---|
| Burden of Proof | High. You must prove a new workplace hazard or accident occurred. | Lower. You just prove your old, accepted injury has worsened medically. |
| LOE Calculation | Based strictly on your current wages right before the new accident. | Based on your original indexed earnings OR current earnings, whichever is higher. |
| Paperwork Required | Must file a new Form 6 and start the entire adjudicative process over. | Simply reopen the old claim number with a clinical medical update. |
| Employer Impact | Impacts the safety record of your current employer. | Costs are applied to the employer where the original accident happened. |
How Long Does the Process Take?
Reopening an old claim can be faster than starting from scratch, but it still requires a medical review. ⏰ If your doctor provides clear evidence of a flare-up, WSIB can approve a recurrence and reinstate LOE benefits within 2 to 4 weeks. However, if WSIB requires an independent medical assessment to prove the link, the delay can stretch to 3 to 5 months.
Frequently Asked Questions (FAQ)
What if I have a different employer now?
You can still claim a recurrence even if you work for a completely new company in Ontario. The costs of the recurrence will generally be charged back to the WSIB account of the original employer where the injury first occurred.
Is there a time limit on claiming a recurrence?
No, there is no strict statute of limitations on recurrences. A worker can suffer a recurrence 5 or even 10 years after the original injury. However, the longer the gap, the harder it is to medically prove the current pain is directly linked to the old accident.
Can I claim a recurrence if I was fully cleared to work?
Yes. Even if a doctor previously declared you at Maximum Medical Recovery (MMR) and you were working full-time without restrictions, bodies change. If the old injury unexpectedly degenerates, you are legally entitled to reopen the claim.
Will a recurrence increase my Non-Economic Loss (NEL) award?
If the recurrence represents a permanent, significant worsening of your clinical condition (a redetermination), you may be entitled to apply for an increase in your lump-sum NEL payout once you stabilize again.
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