Self-Assessment Tax Returns

Self Assessment, sorted, from only £96

Fixed-fee tax returns for sole traders, landlords and anyone who needs to file with HMRC. No hidden charges, no surprises: just a straightforward service that keeps you compliant and penalty-free.

Transparent fixed fees

HMRC-authorised agents

Dedicated accountant

Deadline reminders included

See fixed fees Contact us

Website launch offer

20% off your first tax return

We’re celebrating the launch of our new website with 20% off your first Self Assessment service.

Simply complete the form now. Once you’ve registered, you’ll have 12 months to use the discount on your first eligible Self Assessment service.

Transparent pricing

Fixed-fee Self-Assessment prices

Know exactly what you will pay before we start. No hourly rates, no surprise add-ons: just clear pricing for every type of return.

Standard Tax Return

£198

For sole traders and landlords with one source of self-employment or property income.

Partnership Tax Return

£450

Full partnership return prepared and filed, including partner statements where required.

Partner in the Same Tax Year

£330

An additional partner return linked to a partnership filing in the same year.

Zero Income Return

£96

A simple nil return to keep your HMRC record clean and penalty-free.

Employment-only Income

£96

For clients with PAYE income only and no self-employment to declare.

Amendments to Previous Returns

£150

Correct and resubmit a return that has already been filed with HMRC.

SA Check / Verification Service

From £360 to £500

HMRC compliance check support, priced according to complexity and records involved.

Deadlines

Do not leave it until the last minute

HMRC deadlines are fixed and penalties apply for late filing. We track the dates for you and send reminders so nothing is missed.

Tax year period

6 April to 5 April

The UK tax year runs from 6 April to 5 April the following year.

Filing deadline

31 January

Your online Self-Assessment return and any payment are due by 31 January.

Payment deadline

31 January

Any tax owed must reach HMRC by 31 January, including Payments on Account.

The sooner you send your records, the sooner we can file, and the sooner you know where you stand.

What we need from you

Your Self-Assessment checklist

Gathering these details upfront helps us file your return accurately and avoids delays. If you are missing anything, we will guide you through it.

Personal details

Full name
Date of birth
Nationality
National Insurance number

Verification documents

Passport or driving licence copy
National Insurance number card or proof

Work and HMRC details

Job title or trade
Self-employment start date
Unique Taxpayer Reference (UTR)

Income and expense records

Invoices and receipts
Business bank statements
P60 or P45 if you also had employment income

How it works

Getting started is simple

From your first enquiry to your filed return, we keep the process clear and stress-free.

Get your UTR

If you do not yet have a Unique Taxpayer Reference, we can apply for one on your behalf for £74.

Complete our secure form

Fill in your personal details and upload the documents we need through our safe online form.

Sign the 64-8 form

Authorise Sparks Accounting to act as your HMRC agent so we can file and speak to HMRC for you.

Meet your accountant

Once authorised, a dedicated team member is assigned to manage your account and keep you on track.

Get started

Start your Self-Assessment return

Request a free consultation or send us your details and we will confirm your fixed fee before any work begins.

HMRC compliance, handled

We prepare and file your return in line with HMRC rules, keep you updated on changes that affect you, and help you avoid penalties and missed deadlines.