What if I stop working through my Personal Service Company or partnership before the end of the year (an in-year event)?

The IR35 deemed payment is normally treated as made on 5 April, however, if you stop working for your PSC or partnership during the year then it is treated as made when that happens. Should this happen you will need to calculate the IR35 deemed payment at that time and arrange for any tax and national insurance contributions to be paid to HMRC in the normal way, as for any payment of salary. The form P45 should also be completed in the usual way.