Skip to content

Late tax returns and HMRC penalties

Late tax returns and HMRC penalty appeals in Liverpool

Behind on your tax returns or facing an HMRC penalty? We bring your returns up to date and appeal penalties where there are grounds.

In short

Back up to date, and penalties challenged where we can.

Late returns get more expensive the longer they wait. HMRC adds penalties at set points, then interest on top. The good news is that the cost stops growing once the returns are filed and the tax is dealt with. We start with the oldest return, file everything in order, and look at every penalty to see if it can be appealed.

What is included

Catching up
We rebuild your figures from bank statements and whatever paperwork you have, and file each overdue return in turn.
Checking the penalties
We check each penalty against the dates and the rules. Where HMRC has sent an estimated bill, filing the real return replaces the estimate with your actual figures.
Appeals
If something genuinely stopped you filing on time, we write the appeal and send it with the evidence HMRC will want to see.
Dealing with HMRC
We speak to HMRC for you, including about spreading what you owe over time if you cannot pay it all at once.

Who this is for

  • Anyone who has missed a Self Assessment deadline
  • People with several years of returns outstanding
  • Anyone who has received a penalty notice
  • People who do not know where to start with HMRC letters

When it is due

Appeals generally have to be made within 30 days of the penalty notice, so get in touch as soon as a penalty arrives.

We confirm your dates in writing and keep track of them for you from then on.

Behind on your tax returns?

Missing a tax return is more common than people admit. Illness, a family crisis, a business that took off, or just letters left unopened. Whatever the reason, the cost keeps growing until the returns are filed. The first step is always the same: get the returns in.

We prepare overdue Self Assessment returns from whatever records you have, file them in order, and then look at every penalty to see whether an HMRC penalty appeal has a fair chance. We will tell you honestly if it does not.

How HMRC penalties for a late tax return build up

Self Assessment late filing penalties
How lateLate filing penalty
1 day£100
3 months£10 a day, up to £900
6 months5% of the tax due or £300, whichever is greater
12 monthsAnother 5% of the tax due or £300, whichever is greater

Late payment is separate. You pay 5% of the unpaid tax at 30 days, 6 months and 12 months, plus interest.

Say a return with £2,000 of tax due is filed 6 months late. The filing penalties are £100, then £900 in daily penalties, then £300 (because 5% of £2,000 is only £100). That is £1,300 before any late payment penalties or interest. Our guide to Self Assessment penalties and appeals has more detail.

Can you appeal an HMRC penalty?

Yes, if you had a reasonable excuse. That means something outside your control stopped you meeting the deadline, and you put things right as soon as you could once it had passed. HMRC’s own examples include a serious illness or unexpected stay in hospital, the death of a partner or close relative shortly before the deadline, and failures of HMRC’s online service.

Things that usually do not count include relying on someone else who let you down, not receiving a reminder, or finding the online system difficult.

What if you cannot pay what you owe?

Many people put off filing because they are worried about the bill. That usually makes it worse. Penalties and interest keep adding up while the return is outstanding, and HMRC may send an estimated bill that is higher than the real one.

Once the returns are filed, you know the real figure. If you cannot pay it all at once, HMRC can agree a payment plan, often called Time to Pay, which spreads the bill over a period of months. Interest still runs, but the pressure eases, and a plan agreed before the next penalty date can stop that late payment penalty being added. We can make that request with you and make sure the monthly amount is one you can actually afford.

How we help, step by step

  1. 1

    Tell us what you have had from HMRC

    Send photos of the letters in a free chat. We work out which years are open and what penalties have been charged.

  2. 2

    Agree a fixed price

    You get a written quote within one working day, covering the catch-up and the regular work after it.

  3. 3

    File the oldest return first

    We rebuild figures from bank statements and records, then file each overdue return in turn.

  4. 4

    Appeal where there are grounds

    We write the appeal, gather the evidence HMRC will want and send it. If an appeal is refused, we talk you through the next options.

  5. 5

    Sort out payment

    We give you the final bill and, if you cannot pay it all at once, discuss a payment plan with HMRC.

What it costs and what to send

Catch-up work is quoted as a fixed amount, and ongoing returns move onto a fixed monthly fee from £99 for self-employed people and landlords. See our fees page, or send us a message with the letters you have received.

  • Every HMRC letter and penalty notice you have, even unopened ones
  • Your UTR and National Insurance number
  • Bank statements for each year that is late
  • Any income records, CIS statements, P60s or rent statements you have
  • Evidence for your reason for being late, such as hospital letters

Common questions

I owe no tax. Can HMRC still fine me for filing late?

Yes. The £100 penalty applies if the return is late, even if no tax is due. If you should never have needed a return in the first place, we can ask HMRC to cancel it and the penalty with it.

How far back can you bring my returns up to date?

As far as HMRC needs. We start with what HMRC says is outstanding and work through each year in order.

Will appealing make HMRC look at me more closely?

An appeal is a normal part of the system. Filing honest, accurate returns is what matters, and it is the best footing for any appeal.

Can you deal with HMRC so I do not have to call them?

Yes. Once we are your agent, we handle calls and letters with HMRC for you and tell you what has been agreed.

When is the next deadline?

The online return for 2025/26 is due by 31 January 2027. See our Self Assessment deadline guide.

A penalty notice and supporting papers being read through

How we run it

A routine, not a panic

We agree at the start what we need from you and when, and what you get back and when. After that it just happens, without anyone chasing anyone.

You get a written list of every date that applies to you, a reminder before each one, and the filing done early. If something changes in your business we change the plan, instead of finding out about it at the year end.

  • Overdue tax returns prepared and filed
  • Every penalty checked to see if it is correct
  • Appeals written where you have a reasonable excuse
  • Time to pay arrangements discussed with HMRC

How it works

Four steps, and three of them are ours

Changing accountant sounds like hard work. It is not, and almost none of it falls to you.

  1. A first phone call with a new client01

    A free 20-minute chat

    Tell us what you do and what you need. No charge, no pressure and no sales pitch.

  2. A written price being prepared for a new client02

    A price in writing

    Within one working day you get one monthly price and a list of exactly what it covers.

  3. Client records being collected when changing accountant03

    We do the moving

    We write to your old accountant, collect your paperwork and register with HMRC. You sign one form.

  4. The month-to-month routine of bookkeeping and filing04

    You stop worrying about it

    We remind you before every deadline and file early. You hear from us before you hear from HMRC.

Prices

Find out what it would cost you

A quick look at what you actually need, then one monthly price in writing that does not change unless your business does.

Or call us directly07491 440849