A breakdown of late Self Assessment fines and penalties
including how much a late return and /or a late payment on your self assessment could cost you.

You will be fined £100 for a late return if you missed the 31st January Self Assessment deadline.

You have 30 days to pay your tax before 5% is charged on it.

You have 90 days to get your return in, after this time it will cost you £10 a day in fines.


Penalties for Late Return of Self Assessment
regardless of whether tax owing or not

1st Feburary – 1 day late = £100 fine

1st May – 3 months late = £10 a day fine up to a maximum of £900 (90 days) for every day it is late

1st August – 6 months late = £300 fine or 5% of the tax owing, which ever is greater

1st February – 12 months late = another £300 fine or 5% of the tax owing, which ever is greater


Penalties for Late Payment of Tax Owing

1st March – payment now 30 days late = 5% charge on the tax owing on that day

1st August – payment now 6 months late = 5% charge on the tax owing on that day

1st February payment – now 12 months late = 5% charge on the tax owing on that day

Interest is charged on the tax owing including the amount levied in charges at a rate of 3%