Industrial Injuries Disablement Benefit rates 2026/27: weekly amounts and calculator
Last updated · By Mustafa Bilgic · Rates from the DWP list of benefit and pension rates 2026 to 2027 and the Social Security Benefits Up-rating Order 2026
This page sets out every IIDB rate for 2026/27 next to the 2025/26 rate, explains how the assessed percentage is rounded before it is paid, and lists the allowances that can be paid with IIDB. The calculator applies the rounding rules in section 103 of the Social Security Contributions and Benefits Act 1992 and the separate rules for pneumoconiosis, byssinosis and diffuse mesothelioma.
IIDB rates 2026/27 by assessed percentage
IIDB is paid at nine weekly rates, from 20% to 100%. Every rate went up in April 2026: the 100% rate rose from £225.30 to £233.90 a week and the 20% rate from £45.06 to £46.78.
| Assessed level | 2026/27 a week | 2025/26 a week | 52 weeks at 2026/27 rate |
|---|---|---|---|
| 100% | £233.90 | £225.30 | £12,162.80 |
| 90% | £210.51 | £202.77 | £10,946.52 |
| 80% | £187.12 | £180.24 | £9,730.24 |
| 70% | £163.73 | £157.71 | £8,513.96 |
| 60% | £140.34 | £135.18 | £7,297.68 |
| 50% | £116.95 | £112.65 | £6,081.40 |
| 40% | £93.56 | £90.12 | £4,865.12 |
| 30% | £70.17 | £67.59 | £3,648.84 |
| 20% | £46.78 | £45.06 | £2,432.56 |
IIDB calculator 2026/27
Weekly amount from your assessed percentage
If you have assessments for more than one accident or disease, enter them added together: the total is rounded, not each part.
How your assessed percentage is paid
A medical adviser assesses your disablement on a scale of 1 to 100%. The percentage is then turned into one of the nine weekly rates. Section 103 of the Social Security Contributions and Benefits Act 1992 sets the rules, and the DWP technical guidance shows them as a table.
- Below 14%. No weekly IIDB, unless the assessment is for pneumoconiosis or byssinosis.
- 14% to 19%. Treated as 20%, so paid at £46.78 a week.
- 20% and over. Rounded to the nearest multiple of 10. A percentage ending in 5 goes up, so 25% is paid at the 30% rate while 24% is paid at the 20% rate.
- More than one accident or disease. Assessments can be added together, which the DWP calls aggregation, and the total is rounded rather than each part. The most you can be paid is the 100% rate, even if the assessments add up to more.
| Your assessment | Paid at | 2026/27 a week |
|---|---|---|
| 1% to 13% | No weekly IIDB | £0.00 |
| 14% to 24% | 20% rate | £46.78 |
| 25% to 34% | 30% rate | £70.17 |
| 35% to 44% | 40% rate | £93.56 |
| 45% to 54% | 50% rate | £116.95 |
| 55% to 64% | 60% rate | £140.34 |
| 65% to 74% | 70% rate | £163.73 |
| 75% to 84% | 80% rate | £187.12 |
| 85% to 94% | 90% rate | £210.51 |
| 95% to 100% | 100% rate | £233.90 |
IIDB cannot be paid for the first 15 weeks (90 days, not counting Sundays) after the date of an accident. For most prescribed diseases, the same wait runs from the date the disease started.
Pneumoconiosis, byssinosis and diffuse mesothelioma
For pneumoconiosis and byssinosis, IIDB can be paid from an assessment of 1%. Regulation 20 of the Social Security (Industrial Injuries) (Prescribed Diseases) Regulations 1985 pays an assessment of 1% to 10% at one-tenth of the 100% rate, which is £23.39 a week in 2026/27, and an assessment of 11% to 19% at the 20% rate.
Diffuse mesothelioma is assessed as 100%, so it is paid at £233.90 a week. For diffuse mesothelioma and asbestos-related lung cancer, payment can be made from the date you were first disabled by the disease, but not for more than 3 months before the date of your claim. GOV.UK says you will not need a face to face assessment if you are terminally ill or have diffuse mesothelioma. People with mesothelioma may also be able to get a government lump sum under the Pneumoconiosis etc. (Workers' Compensation) Act 1979, the 2008 scheme or the Diffuse Mesothelioma Payment Scheme.
Age rules
The weekly rates are the same at any age. Section 65 of the Welfare Reform Act 2012, headed "Persons under 18", removed the separate column of rates for younger claimants from 5 December 2012, and nidirect says everyone is paid the same rate no matter what age.
Age still matters for two older allowances. Reduced Earnings Allowance (REA) is replaced by Retirement Allowance when you reach State Pension age and are not in regular employment, as long as your REA was at least £2 a week. Retirement Allowance is the lower of 25% of the weekly REA you last received or 10% of the 100% IIDB rate, so it cannot be more than £23.39 a week in 2026/27. The increases to Unemployability Supplement also depend on your age when you first qualified, but that supplement only continues for people who were getting it before 6 April 1987.
Allowances paid with IIDB in 2026/27
| Allowance and who can get it | 2026/27 | 2025/26 |
|---|---|---|
| Constant Attendance Allowance, part-time rate | £46.80 | £45.10 |
| Constant Attendance Allowance, normal maximum rate | £93.60 | £90.20 |
| Constant Attendance Allowance, intermediate rate | £140.40 | £135.30 |
| Constant Attendance Allowance, exceptional rate | £187.20 | £180.40 |
| Exceptionally Severe Disablement Allowance | £93.60 | £90.20 |
| Reduced Earnings Allowance (maximum) | £93.56 | £90.12 |
| Retirement Allowance (maximum) | £23.39 | £22.53 |
| Unemployability Supplement | £144.65 | £139.35 |
| Maximum disablement gratuity (lump sum) | £15,520 | £14,950 |
Constant Attendance Allowance (CAA) is paid at one of four rates, depending on how much looking after you need. There is no right of appeal against a CAA decision, but you can ask for it to be reconsidered. Exceptionally Severe Disablement Allowance is considered automatically when CAA is awarded at the intermediate or exceptional rate.
REA pays the difference between your earnings in your regular occupation and in the work you can do now, up to a maximum equal to the 40% IIDB rate. If you have more than one REA award, IIDB and REA together are limited to the 140% rate.
How IIDB affects other benefits and tax
- You can still get IIDB if you are claiming contribution-based Employment and Support Allowance, Incapacity Benefit, New Style Jobseeker's Allowance or the State Pension.
- IIDB affects income-related Employment and Support Allowance, Pension Credit, Housing Benefit and Universal Credit if you or your partner claim them, and it may affect Council Tax Reduction.
- If you get CAA, you cannot also get Attendance Allowance, the care component of Disability Living Allowance or the daily living component of Personal Independence Payment unless that benefit is higher. In that case you get CAA and may get the balance of the other benefit.
- Industrial Injuries Benefit is on the GOV.UK list of state benefits you do not pay Income Tax on. Pensions paid by the Industrial Death Benefit scheme are taxable.
How to claim IIDB
You claim on a paper form: form BI100A for an accident caused by work, or form BI100PD for a disease caused by work. Both can be downloaded from GOV.UK with notes that help you fill them in, or you can ask the Barnsley IIDB Centre to send one on 0800 121 8379 (Monday to Friday, 9am to 5pm). The scheme covers more than 70 diseases, including asthma, COPD, deafness, pneumoconiosis and diffuse mesothelioma. You cannot claim IIDB if you were self-employed.
Your claim is assessed from the information on the form or at a face to face medical assessment. If you disagree with the decision, you can ask for a mandatory reconsideration. In Northern Ireland, contact the Department for Communities for a form.
Sources and methodology
The rates were read from the DWP list of benefit and pension rates 2026 to 2027 and checked against three other official sources: the GOV.UK IIDB guide, Schedule 1 to the Social Security Benefits Up-rating Order 2026 and the Veterans UK rate chart, which repeats the IIDB rates. The calculator's rounding was tested against every whole percentage in the DWP technical guidance table.
- Benefit and pension rates 2026 to 2027, Department for Work and Pensions, on GOV.UK.
- Industrial Injuries Disablement Benefit guide, on GOV.UK.
- Industrial Injuries Disablement Benefits: technical guidance, Department for Work and Pensions, on GOV.UK.
- The Social Security Benefits Up-rating Order 2026, S.I. 2026/148, on legislation.gov.uk.
- Social Security Contributions and Benefits Act 1992, section 103, on legislation.gov.uk.
- Social Security (Industrial Injuries) (Prescribed Diseases) Regulations 1985, regulation 20, on legislation.gov.uk.
Frequently asked questions
How much is IIDB at 20% in 2026/27?
£46.78 a week. Assessments from 14% to 24% are all paid at the 20% rate, because 14% to 19% is treated as 20% and 21% to 24% rounds down to 20%.
What is the 100% IIDB rate for 2026/27?
£233.90 a week, up from £225.30 in 2025/26. With Constant Attendance Allowance at the exceptional rate (£187.20) and Exceptionally Severe Disablement Allowance (£93.60), the weekly total is £514.70.
Can I get IIDB if I am assessed at less than 14%?
Not normally. The exceptions are pneumoconiosis and byssinosis, which can be paid from 1%, and cases where assessments for more than one accident or disease add up to 14% or more. Reduced Earnings Allowance can be paid from 1% if the accident or disease began before 1 October 1990.
Is Industrial Injuries Disablement Benefit taxable?
No. Industrial Injuries Benefit is on the GOV.UK list of state benefits you do not pay Income Tax on. Pensions paid by the Industrial Death Benefit scheme are taxable.
Does IIDB affect Universal Credit?
Yes. GOV.UK says IIDB affects Universal Credit, income-related Employment and Support Allowance, Pension Credit and Housing Benefit if you or your partner claim them. It does not stop you getting contribution-based ESA, New Style JSA or the State Pension.