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.

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Trusted by thousands of UK businesses

We've got you covered

Focus on your growing your business while we handle all your accounting needs.

Your business accounting on autopilot. Everything done online.

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.


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

What's included?

  • Accounting software setup
  • Bookkeeping
  • Year-end accounts and Corporation tax return
  • Dedicated accountant for support
  • Directors tax return
  • Payroll support and pension filing
  • Quarterly VAT filing
  • Professional references (lettings mortgages)

Pricing upon request

Request a quote today!

Tell us about your business and we’ll get back to you with a quote based on your requirements.

All packages include fixed monthly prices with no hidden fees.

Switch to Sleek - it’s simple


Book a free consultation

Tell us about your business and we’ll provide you with a simple solution.


Meet your accountant

After a quick and easy set up, your new accountant will get in touch.


Focus on your business

From there you'll get started and can leave your books with us.

Frequently Asked Questions

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.

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.

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.

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.

Need help? Speak to one of our experts today!

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