What to Do When Your WSIB Claim Is Denied

Getting a letter that says your WSIB claim has been denied is devastating. You are already dealing with pain, lost income, and stress, and now the system you counted on has turned you away.

Take a breath. A denial is not the end of the road. Thousands of Ontario workers successfully appeal WSIB decisions every year, and you may have strong grounds to do the same.

This guide explains why WSIB claims get denied, the exact steps you can take to fight back, and the deadlines you absolutely cannot miss.

Why Was Your WSIB Claim Denied?

Understanding the reason behind your denial is the first step toward overturning it. Here are the most common reasons the Workplace Safety and Insurance Board rejects claims:

1. Insufficient Medical Evidence

This is the number one reason for WSIB denials. If your medical records do not clearly connect your injury or illness to your job, WSIB may reject your claim. For example, if your doctor wrote that you have a back injury but did not specifically state it was caused by your work duties, that gap in documentation can lead to a denial.

What you can do: Ask your doctor to provide a detailed medical report that explicitly links your condition to your workplace activities, tasks, or exposures.

2. Late Reporting

Ontario law requires you to report a workplace injury to your employer as soon as possible. If there is a significant delay between when the injury happened and when you reported it, WSIB may question whether it was truly work-related.

What you can do: Even if you reported late, provide a written explanation for the delay. Legitimate reasons, such as not realizing the severity of the injury at first, can be accepted.

3. Your Employer Disputed the Claim

Employers have the right to contest your WSIB claim. They may argue that the injury happened outside of work, that you had a pre-existing condition, or that your job duties could not have caused the injury. WSIB considers employer input when making decisions.

What you can do: Gather witness statements from coworkers, incident reports, and any other evidence that supports your version of events.

4. Pre-Existing Conditions

If WSIB determines that your symptoms are related to a condition you had before the workplace incident, they may deny your claim. However, Ontario law recognizes that work can aggravate a pre-existing condition, and you may still be entitled to benefits in that situation.

What you can do: Get medical evidence showing how your workplace activities worsened your pre-existing condition beyond its natural progression.

5. Inconsistent Information

If your claim form, your employer's report, and your doctor's notes describe the injury differently, WSIB may see red flags. Consistent documentation from all parties is essential.

What you can do: Review all documents before they are submitted to make sure the details align regarding what happened, when, and how.

Your Right to Appeal: Understanding the Process

If your WSIB claim is denied, you have the legal right to challenge that decision. The appeal process in Ontario has two main levels:

Level 1: Internal Review (Objection to WSIB)

The first step is to file an Intent to Object form directly with the WSIB. This asks a different decision-maker within WSIB to review your case with fresh eyes.

Here is how it works:

1. Get the Intent to Object form from the WSIB website or by calling them
2. Complete and submit the form within the time limit (see deadlines below)
3. The front-line decision maker reconsiders your case and may request additional information
4. If the decision is not changed, you will receive an Appeal Readiness Form to proceed to a full appeal hearing

During this stage, you can submit new medical evidence, witness statements, or any other documentation that supports your claim.

Level 2: WSIAT Appeal (Workplace Safety and Insurance Appeals Tribunal)

If the internal review does not overturn the denial, you can appeal to the WSIAT, which is an independent tribunal separate from the WSIB. The WSIAT is the final level of appeal for workplace safety and insurance matters in Ontario.

At the WSIAT, your case will be heard by an independent adjudicator who was not involved in the original decision. You can present evidence, call witnesses, and have legal representation argue your case.

Critical Deadlines You Cannot Miss

The Workplace Safety and Insurance Act (Section 120) sets strict time limits for objecting to WSIB decisions. Missing these deadlines can cost you your right to appeal:

Type of Decision	Time Limit to Object
Return-to-work decisions	30 days
Re-employment decisions	30 days
All other WSIB decisions (including claim denials)	6 months

Important: If you are objecting to two decisions with different time limits, WSIB defaults to the six-month limit for both. However, do not wait. The sooner you act, the stronger your case will be.

If you have missed the deadline, WSIB may still extend the time limit in certain circumstances. Factors they consider include whether you had a reasonable explanation for the delay and whether your employer would be prejudiced by a late appeal.

Why Professional Representation Matters

You have the right to represent yourself in a WSIB appeal, but the process is complex, and the stakes are high. Here is why hiring a WSIB lawyer or paralegal can make a significant difference:

• They know the system inside and out. WSIB has its own policies, procedures, and legal framework. Experienced representatives understand how decisions are made and what evidence carries the most weight.
• They handle the paperwork. Appeals involve detailed forms, medical reports, legal submissions, and strict deadlines. A representative manages all of this so you can focus on your recovery.
• They can identify issues you might miss. An experienced advocate may spot entitlements you did not know you had, such as benefits for secondary conditions related to your original injury.
• Most work on contingency. Many WSIB lawyers and paralegals in Ontario charge on a contingency basis, typically around 30% of your settlement. This means you pay nothing upfront, and they only get paid if you win.

Steps to Take Right Now

If your WSIB claim has just been denied, here is your action plan:

1. Read the denial letter carefully. Understand exactly why your claim was denied and note the deadline to appeal.
2. Do not wait. Start gathering additional medical evidence and documentation immediately.
3. Talk to a WSIB specialist. Most WSIB lawyers and paralegals offer free consultations. They can review your denial and tell you whether you have grounds to appeal.
4. Keep records of everything. Save all WSIB correspondence, medical reports, and any communication with your employer about your injury.
5. File your Intent to Object before the deadline expires.

How ClaimIt Can Help

At ClaimIt, we connect injured Ontario workers with verified WSIB lawyers and paralegals who specialize in exactly these situations. Our platform is completely free for workers to use.

Here is how it works:

1. Browse our directory of 14+ verified WSIB specialists
2. Compare experience levels, success rates, and fee structures
3. Click "Choose" on your preferred representative and fill out a quick intake form
4. Your chosen representative reviews your case and reaches out to discuss next steps

Our representatives include former WSIB insiders with decades of experience navigating the system from the inside. They know how WSIB makes decisions because many of them used to make those decisions themselves.

Find a WSIB representative now →

Frequently Asked Questions

Can I still appeal if I missed the deadline?

Possibly. WSIB can extend time limits in certain circumstances, such as when there is a reasonable explanation for the delay. Contact a WSIB representative as soon as possible to discuss your options.

How much does it cost to appeal a WSIB decision?

Many WSIB lawyers and paralegals work on a contingency fee basis, meaning you pay nothing upfront. They typically charge around 30% of your settlement amount, and you only pay if they win your case.

How long does a WSIB appeal take?

The timeline varies depending on the complexity of your case and the level of appeal. An internal review with WSIB can take several weeks to months. A WSIAT appeal may take longer, depending on hearing availability and the evidence involved.

What is the difference between a WSIB lawyer and a paralegal?

Both are licensed by the Law Society of Ontario to represent you in WSIB matters. Paralegals can represent you at WSIB and WSIAT hearings. Lawyers can do the same and can also represent you in court if your case goes to judicial review. Compare WSIB lawyers and paralegals on ClaimIt to find the right fit for your situation.

What evidence do I need for my appeal?

The most important evidence includes detailed medical reports linking your condition to your work, witness statements from coworkers, incident reports, and any correspondence with your employer about the injury. Your representative can help you identify exactly what is needed.

Disclaimer: This article provides general information about the WSIB appeal process in Ontario and is not legal advice. For guidance specific to your situation, consult with a licensed WSIB lawyer or paralegal. ClaimIt is a directory platform that connects workers with legal representatives and is not a law firm.