P11D- Loan Benefit Calculator using old interest rate for 25/26- 2.25% and should be 3.75%
Article ID
p11d-loan-benefit-calculator-using-old-interest-rate-for-25-26-2-25-and-should-be-3-75
Article Name
P11D- Loan Benefit Calculator using old interest rate for 25/26- 2.25% and should be 3.75%
Created Date
20th April 2026
Problem
Resolution
In the 2026 tax year on version 26.1, the P11D Benefit Calculator is still using the old rate of 2.25 when it should be 3.75. Beneficial loan arrangements — HMRC official rates – GOV.UK
Please use the override % rate and edit the rate. Select ‘Loan benefit calculator’ and edit from here
We will be looking for a future IRIS update to correct the % rate and will update this KB once we have further news.
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