The tax year ends on 5
April and within a few days you will receive your tax return form
to complete. You have until 31 October to send in your tax return
if you want HMRC to calculate your tax bills for you. If you, or
your accountant, calculate the tax liabilities then you have until
31 January to get your form in.
Alternatively you can
use the Revenue's on-line tax return system which automatically
calculates the tax for you, in which case you have until 31
January. There is also a separate, and more sophisticated, on- line
system for accounts to submit tax returns on behalf of their
clients.
There is no penalty
for missing the 31 October deadline. You just won't necessarily
know by the time your tax is due how much you
owe.
It's fairly well known
- because the Revenue get Adam Hart-Davis to tell us every year -
that there is an automatic £100 penalty if you miss the 31
January deadline. It's well known but not strictly true. The
maximum penalty is £100 or the amount of tax outstanding at 31
January, which ever is lower. So if you don't owe any tax there
can't be a penalty, and if you only owe £20 then the penalty
is not £100 but £20. If you are charged the £100
penalty and then get your return in late which shows you owe less
than £100 then all, or part, of the penalty will be
automatically cancelled.
If your tax return is
still not in by 31 July then there is a further £100
penalty.
HMRC can also apply to
the General Commissioners (a judicial body similar to magistrates
whose hearings are held in private) for daily penalties. This
starts to get seriously expensive because there is a penalty of
£60 for each day you fail to send in your completed tax
return, and the penalties are not reduced if it eventually
transpires that you don't owe any tax.
Of course charging
penalties doesn't get HMRC their tax. So at the same time they can
issue a Determination. This is their estimate of your tax and class
4 NI. It's likely to be an overestimate and the tax will be due for
payment immediately because the normal due dates for payment of tax
will almost certainly have already passed. You cannot appeal
against a determination, but provided you get your tax return in
within the next 12 months the determination will automatically be
replaced by the figures from your return.