Compliance
How UK’s New UTT Extension Shapes Tax Risk for Large Businesses
The UK has launched a consultation to **extend the Notification of Uncertain Tax Treatment (UTT)** regime—here’s what large businesses need to know now to manage compliance and tax risk.
By NomadicTax Research Team • 5-8 min read • April 10, 2026
## What is the UTT regime?
The **Notification of Uncertain Tax Treatment by Large Businesses** (UTT) regime was introduced via Schedule 17 to the Finance Act 2022. It requires large businesses to notify HMRC of legal interpretation uncertainties in their tax positions if:
- the tax advantage exceeds £5 million, and
- either they adopt a position contrary to HMRC’s published view or make provision in their accounts recognising uncertainty. ([gov.uk](https://www.gov.uk/government/consultations/consultation-extend-notification-of-uncertain-tax-treatment-utt-regime/opportunities-to-extend-uncertain-tax-treatment?utm_source=openai))
The regime applies to Corporation Tax, Value Added Tax, and Income Tax (including through PAYE) returns filed on or after 1 April 2022. ([gov.uk](https://www.gov.uk/government/consultations/consultation-extend-notification-of-uncertain-tax-treatment-utt-regime/opportunities-to-extend-uncertain-tax-treatment?utm_source=openai))
## What’s changing: the UTT Extension Consultation
A new consultation published about **four weeks ago** proposes clarifications and adjustments to UTT’s scope and how it operates:
- **Defining “uncertain tax treatment” more clearly**—refining what triggers a notification. ([gov.uk](https://www.gov.uk/government/consultations/consultation-extend-notification-of-uncertain-tax-treatment-utt-regime/opportunities-to-extend-uncertain-tax-treatment?utm_source=openai))
- **Exemptions where HMRC is already aware of the uncertainty**—if discussion has happened with HMRC or the matter is guidance-covered, no separate UTT notification may be needed. ([gov.uk](https://www.gov.uk/government/consultations/consultation-extend-notification-of-uncertain-tax-treatment-utt-regime/opportunities-to-extend-uncertain-tax-treatment?utm_source=openai))
- **Business size & thresholds remain**—tax advantage threshold still £5 million. ([gov.uk](https://www.gov.uk/government/consultations/consultation-extend-notification-of-uncertain-tax-treatment-utt-regime/opportunities-to-extend-uncertain-tax-treatment?utm_source=openai))
## Implications: What Businesses Need to Do Now
Here are the actionable steps large businesses should take:
- **Review your tax governance** to identify positions where tax treatment is unsettled or possibly differs from official HMRC guidance.
- **Check what has already been communicated to HMRC**—maybe a prior conversation or guidance means you don’t need to file a new UTT.
- **Ensure accounting provisions reflect uncertainty** properly—if provision is made recognising potential loss, that may trigger notification requirement.
- **Track changes in HMRC’s guidance** so you aren’t surprised when public positions are updated and your treatments diverge.
- **Document everything** clearly—so that it's easier to demonstrate whether you believed HMRC was aware or whether your UTT obligations were triggered legitimately.
## Practical Example
> A multinational software company predicts that its VAT rate on cloud-based service bundles might be reclassified. It includes a £6 million provision in its financial statements reflecting doubts. Under UTT regime, because tax advantage depends on lower VAT, it must notify HMRC if the threshold of £5 million is exceeded.
> But if HMRC has already published guidance stating that cloud bundles will be standard-rated, and the company’s position is contrary, then notification required unless it reasonably believes HMRC is aware.
## Conclusion
The proposed extension to the UTT regime may not drastically expand its scope, but it raises the need for large businesses to sharpen their **risk assessment**, **recordkeeping**, and **communication with HMRC**. Being proactive will help avoid penalties, surprises, or exposure arising from uncertain tax treatments.