CH155514 | Penalties for failure to pay on time: rules for specific taxes: Plastic Packaging Tax (PPT): penalties – failure to pay all or part of amounts due – overview
From HM Revenue & Customs · Compliance Handbook
If a person fails to make a full payment of PPT by the due date, they become liable to a penalty on the amount unpaid.
The penalties for failing to pay PPT in full and on time are
So, a failure to pay that continues for 11 months after the penalty date can incur all of these penalties on the same unpaid PPT.
It is important to distinguish between
the due date - the date when the person needs to pay the PPT, and
the penalty date - which is normally the day after the due date and the first date on which a penalty is chargeable for a tax period.