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Self Assessment

Staying on top of self assessment can be time-consuming. Hand over the stress and gain time to grow focus on what you do best.

If you’re self-employed, we can help you with filing your self-assessment. Through our precise, efficient service, you’ll save time and money. ​

Trusted by 450,000+ companies worldwide

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Self-employed

See why thousands choose Sleek

Swift set up

We help transition you from paper to digital accounting seamlessly with our digital tools.

Cost transparency

No hidden fees along the way. We believe in transparency; hence we have fixed accounting prices.

Efficiency

We simplify your year-end processes using the cloud. Expect short lead times when we produce your accounts.

Peace of mind

Our team of expert is at your disposal so that you can stay focused on your business' growth.

Self-assessment filing made simple

Self Assessment

Stay stress-free and compliant with your tax obligations. We handle your self-assessment filing with precision and efficiency, so you can save time, reduce hassle, and focus on growing your business.

£250 plus VAT

Preparation and submission of Self Assessment Tax Return

Tax calculation

Advice on tax payments and payments on account

Preparation of tax year overviews

Self-employed profit and loss accounts

Rental profit and loss accounts

Liaise with HMRC as your Agent

Ad hoc advice throughout the year

Reference documents can be provided for an additional fee (landlord, mortgage etc)

Experience the difference with expert self-assessment

Small business or entrepreneur - We've got you covered

Focus on growing your success while we handle your self-assessment.

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Loved by entrepreneurs across the world

Stephen Hendry

CEO & Founder, SEFP LTD
“Emma has been amazing with the set up and formation of our company. She’s always at the end of the phone and has gone well beyond what’s required. Highly recommend and can’t wait to use her again for the next company purchase”
OMOTOLA AJAYI TRAVELS LTD

Oluwatosin Omotola

Entrepreneur, Founder, Omotola Ajayi Travelts Ltd

“I consider myself very lucky to have come across this wonderful organisation that helped me register my company. I was so confused and didn’t know how to go about it.”

Maximilian Cater

CEO & Founder
“Dealt with Emma Clark, Easy efficient and couldn’t praise how easy process to deal with open 2 companies and can’t praise how well she dealt with both.”
Seb Francis

Seb Francis

Co-Founder & Director, Titus Learning Ltd
“Nicky was extremely good at explaining the most productive ways of me getting my business set up and very friendly throughout the entire process, this experience alone, was far better and more informative than all the other companies I have spoken to.”

Kira

Entrepreneur
“What made special about our experience with the company is working with Nicky Perucho, Head of UK Incorporations. Every our request was met with care and speed in execution. Many thanks for looking after our account!”

Victoria Haynes

CEO & Founder, Neon Hop
“Emma was brilliant!! This was my first business set up so there was a lot of things I was unsure of and she helped me from the beginning to the end, I even called a few times after the set up and she was always very welcoming and helpful”

Focus on your business whilst we run your back office

Meet the experts powering your finances

Toby Denwood - Sleek UK Tax Manager

Toby Denwood

Tax Manager

United Kingdom

Toby is a tax specialist with expertise in personal tax, SEIS/EIS and R&D tax relief. He helps clients uncover opportunities, stay compliant and manage tax efficiently.

James Fry

Head of Accounting

United Kingdom

James has over 20 years of accounting experience, specialising in SME advisory and digital transformation. He helps businesses adopt Xero and make accounting faster, clearer and more useful.

Nathan Allatt headshot image

Nathan Allatt

Operations Accounting Manager

United Kingdom

With nearly 10 years of experience, Nathan supports startups with year-end accounts and management reporting. He is known for his hands-on approach and clear financial guidance.

Ready to experience expert self-assessment?

Switching to Sleek is easy. We’ve got you covered every step of the way with our smooth, hassle-free onboarding process

Frequently Asked Questions

What is self assessment tax return?

A self-assessment tax return exists to collect tax from businesses and people who do not have tax automatically deducted from their income. Self-assessment returns must be filled out once a year and sent to HMRC. Accountants such as Sleek can streamline the process, allowing individuals and organisations to save time and money.

Who must send a tax return?

If you operated as a sole trader or business partner in the last financial year (April-April), you must submit a tax return before the end of January the following year. If you have income from some other source, such as savings or money from a rental property, you also must report this. Using an accountant such as Sleek allows you to fill out a self-assessment easily and without error.

What should I include in my self assessment tax return?

When filling out your self assessment tax return, you’ll need your Unique Taxpayer Reference, national insurance number and invoices that show your income and expenses. Working with an accountants such as Sleek allows you to streamline the entire process and avoids you making errors or accidentally paying too much.

Do I need to do a tax return if I earn under 1000 UK pounds?

You do not need to fill out a tax return if you are a sole trader who earned less than £1,000 in the previous tax year. This figure only applies to what you earned before taking tax relief off, however.

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Need more information?

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Carles M,
Sleek Advisor

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