Occupational Asthma Compensation Claims: How Much Can You Claim?

If you’ve developed asthma because of substances you’ve been exposed to at work, you may be entitled to compensation. Occupational asthma compensation claims allow workers to recover damages from employers who failed to protect them from harmful substances — and you can pursue your claim on a no win no fee basis.

Around one in six cases of adult-onset asthma in the UK is linked to workplace exposure, according to the British Thoracic Society. That means thousands of workers each year develop a serious, life-altering condition that could have been prevented.

Here’s what you need to know about making an occupational asthma claim, how much you could receive, and how the process works.

What Is Occupational Asthma?

Occupational asthma is a form of asthma caused directly by exposure to certain substances in the workplace. These substances — known as respiratory sensitisers or asthmagens — trigger an allergic reaction in the airways that leads to breathing difficulties, wheezing, coughing and chest tightness.

This is different from pre-existing asthma that worsens at work. In an occupational asthma claim, the condition must have been caused by your working environment. Your symptoms may appear within weeks of first exposure, or they may develop gradually over months or even years of repeated contact with the harmful substance.

Common Causes and High-Risk Industries

Over 400 substances have been identified as potential causes of occupational asthma. The most frequently reported triggers in the UK include:

• Isocyanates — found in spray paints, varnishes, adhesives and polyurethane foams. Vehicle paint sprayers are among the most affected workers.
• Flour and grain dust — a leading cause among bakers, millers and food production workers.
• Wood dust — particularly hardwoods like oak, beech and mahogany, affecting carpenters and joiners.
• Latex — a concern for healthcare workers who use powdered latex gloves.
• Soldering flux — common in electronics manufacturing.
• Laboratory animals — proteins from animal fur, urine and dander affect research workers.
• Cleaning chemicals — industrial-strength cleaning agents used in hospitality and healthcare.

If you work in baking, vehicle spraying, woodworking, manufacturing, healthcare, hairdressing, farming or construction, you face a higher risk of developing work-related asthma.

How Much Compensation for Occupational Asthma?

The amount you receive depends on the severity of your condition and how it has affected your life. Compensation is typically split into two categories: general damages (for pain and suffering) and special damages (for financial losses).

General Damages — Compensation by Severity

The Judicial College Guidelines provide the framework solicitors and courts use to value occupational asthma claims:

• Mild asthma with some persistent symptoms — £13,000 to £23,500
• Moderate asthma with bronchitis, wheezing and impact on daily life — £23,500 to £32,000
• Severe or chronic asthma with significant breathing difficulties, frequent attacks and substantial disability — £32,000 to £46,900+

In the most serious cases, where occupational asthma leads to permanent lung damage or a complete inability to work, compensation can exceed £46,900.

Special Damages — Financial Losses

On top of your general damages award, you can claim for the financial impact your condition has caused. This includes:

• Lost earnings — if you’ve had to reduce hours, change jobs or stop working entirely
• Future loss of earnings — if your condition prevents you from returning to your previous role
• Medical expenses — the cost of inhalers, medication, specialist consultations and ongoing treatment
• Travel costs — getting to and from medical appointments
• Care and assistance — if you’ve needed help with daily tasks during recovery

Special damages can significantly increase the total value of your claim. A worker forced into early retirement due to severe occupational asthma may receive a six-figure settlement once future earnings are factored in.

Your Employer’s Legal Duty

Your employer has a legal obligation to protect you from harmful substances under the Control of Substances Hazardous to Health Regulations 2002 (COSHH). This means they must:

• Carry out risk assessments to identify hazardous substances in your workplace
• Replace harmful substances with safer alternatives wherever reasonably practicable
• Reduce exposure below the Workplace Exposure Limit (WEL) through ventilation, extraction systems and safe working practices
• Provide personal protective equipment (PPE) such as masks and respirators when exposure cannot be eliminated
• Conduct health surveillance for workers exposed to known asthmagens, including regular check-ups with a trained nurse or occupational health professional
• Report cases of occupational asthma under RIDDOR (Reporting of Injuries, Diseases and Dangerous Occurrences Regulations)

If your employer failed in any of these duties and you developed asthma as a result, they are likely liable for your condition. Common employer failings include not providing adequate ventilation, failing to supply proper PPE, ignoring early warning symptoms, and not conducting COSHH assessments.

Industrial Injuries Disablement Benefit (IIDB)

In addition to a civil compensation claim against your employer, you may be entitled to Industrial Injuries Disablement Benefit (IIDB) from the government. This is a weekly payment for people who have been disabled by a recognised industrial disease.

To qualify for IIDB for occupational asthma, you typically need to be assessed as having at least 14% disability resulting from your condition. The amount you receive depends on the level of disablement. IIDB is paid separately from any compensation claim, so you can receive both.

Claiming IIDB does not affect your right to pursue a civil claim against your employer.

Time Limits: How Long Do You Have to Claim?

You have three years from the date you were diagnosed with occupational asthma — or three years from the date you first became aware that your condition was linked to your work — to make a compensation claim. This is known as the limitation period.

The key date is not necessarily when your symptoms started, but when you knew (or should reasonably have known) that your asthma was caused by workplace exposure. This distinction is important because many workers suffer symptoms for months or years before receiving a formal diagnosis.

If you’re approaching the three-year deadline, seek legal advice as soon as possible. Missing the limitation period typically means you lose the right to claim.

No Win No Fee: How It Works

Occupational asthma claims are commonly pursued on a no win no fee basis, formally known as a Conditional Fee Agreement (CFA). This means:

• You pay nothing upfront to start your claim
• Your solicitor covers the legal costs while your case progresses
• If your claim is unsuccessful, you don’t pay any legal fees
• If you win, your solicitor takes a pre-agreed percentage of your compensation (capped at 25% by law)

Before your claim begins, your solicitor will arrange an insurance policy to protect you against the other side’s legal costs if the claim doesn’t succeed. This makes pursuing a claim genuinely risk-free.

How to Prove Your Occupational Asthma Claim

A successful claim requires evidence linking your workplace exposure to your condition. Key evidence includes:

• Medical records — your GP and hospital records showing when symptoms began and how they’ve progressed
• Specialist diagnosis — a formal diagnosis of occupational asthma from a respiratory consultant or occupational health specialist
• Employment records — proof of your role, the substances you worked with, and the duration of exposure
• Workplace assessments — any COSHH assessments, risk assessments or health surveillance records from your employer
• Witness statements — colleagues who can confirm working conditions, lack of PPE, or inadequate ventilation

Your solicitor will help gather this evidence and, where necessary, instruct independent medical experts to provide a report supporting your claim.

What Should You Do Next?

If you believe your asthma was caused by your work, take these steps:

1. See your GP and request a referral to a respiratory specialist if you haven’t already
2. Keep a record of your symptoms, when they worsen, and what triggers them
3. Report your condition to your employer in writing
4. Contact a specialist solicitor to discuss your claim — most offer a free initial consultation

Don’t wait until your symptoms become unmanageable. Early diagnosis improves both your health outcomes and the strength of your compensation claim.

May I Claim works with specialist no win no fee solicitors who handle occupational asthma claims across the UK. If you’ve been diagnosed with work-related asthma, get your free consultation today — there’s no obligation and no upfront cost.