Most landfill tax issues are driven by waste volumes, classification and liability.
But in many real disputes, the decisive issue isn’t the waste.
The Finance Act deliberately creates two very different regimes to reflect fundamentally different risk profiles.
Registered operators (s.50)
For properly registered landfill sites, HMRC must assess within:
- 2 years from the end of the accounting period, or
- 1 year from when sufficient evidence comes to HMRC’s knowledge, whichever is later
Unregistered operators (s.50A(5))
For unregistered activity, the framework is different. There is no accounting period anchor and HMRC may bring an assessment within 2 years of obtaining sufficient evidence of the facts sufficient to justify the making of the assessment. An unregistered operator is a person who is liable to landfill tax because they have made, caused, or permitted taxable disposals of material, but who has not registered with HMRC under the statutory regime. An unregistered operator will typically include any person associated with unauthorised disposal of waste – e.g. disposal on land that does not benefit from a landfill permit or where waste exemption conditions have not been complied with.
In practice, disputes rarely turn on whether a disposal occurred.
Instead, they turn on:
When did HMRC know enough to justify the assessment?
That question is rarely straightforward and often requires reconstructing a timeline from:
- internal HMRC communications
- inspection records
- intelligence reports
- third-party documentation
At Tribunal, this becomes a forensic exercise – and it can be decisive.
If HMRC had sufficient evidence earlier than it claims, the assessment may be out of time.
In unregistered landfill tax cases, the decisive question is rarely:
“Did the disposal happen?”
It is:
“When did HMRC know – and was the assessment brought in time?”
That distinction is often the difference between a valid in time assessment and an invalid out of time assessment.
For more information, please contact John Dyne.