[Updated February 2025]: If you missed the 31 January deadline to submit your self-assessment tax return, you are now into the penalty stage. HMRC applies an automatic £100 penalty to those who are anywhere from 1 day to 3 months late. Further penalties are then added if you take even longer to comply. It's even worse if you haven't paid the tax owed to HMRC by 31 January because you'll then owe interest on that too.

Our Advice if You’re Late

If you are late submitting your tax return and/or paying the tax owed, our advice is to:

1. submit your tax return without delay;
2. pay as much tax as you can as soon as possible*.
   By doing both, you'll minimise the penalty and interest payable to HMRC.

* Payment of any historic tax for 2023/24 and prior years is best dealt with by the last day of February at the latest. Any amount that remains due for 2023/24 is considered late thereafter and will attract an automatic HMRC charge of 5%.

The post Missed the Tax Return Deadline? What Happens Now? appeared first on Taxfile.

Taxfile prepared and submitted more than 400 Self-Assessment tax returns for clients during January. That's about a hundred a week and goes to show just how busy it gets for us during January, the busiest month in our accounting calendar.

Did you submit your tax return on time?

The deadline for submission of your tax return (and payment of any tax due) was 31st January at midnight. Did you manage to submit yours in time? If not, you're already into the 'penalty' period where HMRC basically fine you for being late. The penalty comes in the form of an initial £100 fine but that increases, potentially very significantly, as you get later and later with your tax return submission. If you look at the table below, it's safe to say that you can end up owing a thousand pounds or more if you bury your head in the sand and are 3 months late, or more. If you continue to leave your tax payment and tax return submission outstanding for six months or more, the penalty is £1300 as a minimum - perhaps more (it depends upon how much tax you owe).

Is your tax return & tax payment late? Taxfile can help!

If you are late submitting your tax return or paying tax and don't know how to straighten things out, don't

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