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HMRC internal manual

MLR1 Penalties Guidance

penalties guidance: identifying the relevant period

The second step when calculating the additional penalty for any business, is to establish the relevant period during which any breaches took place. In most cases this will be from the date of any previous penalty or warning letter issued in this regard, to the date of the follow up compliance visit.

In all other cases the relevant period will be the period of time during which the breaches took place. For example if a penalty without a prior warning is appropriate, the relevant period will be from the date when the breaches began, to the date of the visit.