Pillar Guide · Updated July 2026
Industrial Injuries Disablement Benefit: A Complete UK Guide for 2026/27
Industrial Injuries Disablement Benefit (IIDB) is a tax-free weekly payment for people who have become disabled because of an accident at work or certain diseases caused by their job. Unlike personal injury compensation, it does not depend on proving an employer was at fault. This guide explains who qualifies, how disablement is assessed, current payment rates, and how IIDB fits alongside other benefits and compensation claims.
What IIDB Is
Industrial Injuries Disablement Benefit is a non-means-tested, tax-free weekly benefit paid to employees who are disabled as a result of an accident at work, or who develop one of a defined list of industrial diseases because of the type of work they do. It is not compensation in the legal sense and does not require showing that an employer was negligent; entitlement is based purely on the disability being work-related and reaching a qualifying level of severity.
Who Qualifies
You may qualify if you were an employee (not self-employed) when the accident happened or when you were exposed to the cause of an industrial disease, and a doctor assesses your resulting disablement at 14% or more, except for certain conditions such as some respiratory diseases where a lower threshold can apply. There is no qualifying period of employment required for an accident claim, but industrial disease claims often require evidence of a minimum period of exposure in a relevant occupation.
Prescribed Industrial Diseases
A specific list of 'prescribed diseases' is set out in law, covering conditions with a recognised link to certain occupations, such as industrial deafness from noisy environments, vibration white finger from using vibrating tools, occupational asthma, and various conditions linked to asbestos exposure including asbestosis and mesothelioma. Each prescribed disease has its own criteria linking it to specific types of work, and claimants generally need medical evidence connecting their diagnosis to their occupational history.
How Disablement Is Assessed
A healthcare professional working for the Department for Work and Pensions assesses the percentage of disablement caused by the accident or disease, comparing the claimant's condition against standard percentages set out in regulations for particular injuries, such as loss of a limb or reduced lung function. Assessments can be for a fixed period or, for stable long-term conditions, can be made permanent, and claimants can request a reassessment if their condition changes.
Payment Rates
IIDB is paid on a sliding scale according to the assessed percentage of disablement, with higher percentages of disablement resulting in higher weekly payments, and disablement below 14% (except for certain prescribed diseases) does not attract a payment at all. Rates are reviewed and uprated each April along with other benefits.
Effect on Other Benefits and Compensation
IIDB is not means-tested and does not reduce entitlement to contributory benefits, but it does count as income for some means-tested benefits and can affect the amount paid. Where a claimant also receives a personal injury compensation payment or damages from their employer relating to the same accident or disease, that separate compensation may be reduced to reflect certain state benefits already received, under the Compensation Recovery Unit scheme, though IIDB itself is not simply cancelled out by a compensation award.
Reduced Earnings Allowance (Legacy Cases)
Reduced Earnings Allowance was a related benefit for people whose earning capacity was reduced because of their industrial accident or disease, but it closed to new claims in 1990. People who were already receiving it can continue to do so, usually now paid as Retirement Allowance once they reach State Pension age, but no new awards are made.
How to Claim
Claims are made to the Industrial Injuries Disablement Benefit unit using form BI100A for an accident or the relevant disease-specific claim form, providing details of the accident or occupational history along with medical evidence. It is worth claiming even if you are unsure whether your disablement will reach the qualifying percentage, since the assessment is carried out as part of the claims process rather than beforehand.