SolvedCH157100 | Penalties for Failure to Pay on Time: Penalty assessments: Raising a penalty assessment
From HM Revenue & Customs · Compliance Handbook
Once we have established that a person has become liable to a penalty for a failure to pay on time we will send them a penalty notice and tell them
how we calculated the penalty,
what they owe, and
when they must pay it.
Note - DMB raises all penalties for the late payment of PAYE, NIC, CIS and SL deductions and therefore you do not charge them during a compliance check.
The enforcement rules that apply to the tax for a specific tax regime, also apply to the penalty assessment and so the penalty is enforceable in the same way as an assessment to tax.