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 thousands of UK businesses
Focus on your growing your business while we handle all your accounting needs.
Swift set up
We help transition you from paper to digital accounting seamlessly with our digital tools.
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
Pricing upon request
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.
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.
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.
I met Ed from Sleek when he was visiting our coworking space in London. After a quick chat, Ed explained how I could move my accounts online and also discussed R&D tax credits. His advice has been invaluable!
CEO & Founder
I truly wouldn’t be able to run my business without Sleek. Whilst I’m great at marketing and the sales side of running a business, I’m just not a numbers guy! Sleek has changed the way I look at an accountant.
King Koby Ltd
We’ve been with Sleek since the very beginning of our business. They helped with Seed EIS, R&D and implementing an online cloud bookkeeping system through Xero. Sleek has undoubtedly helped us grow our business.
Co-Founder & Director
Titus Learning Ltd
Titus Learning Ltd
We've been with Sleek since the very beginning of our business. They helped with Seed EIS, R&D and implementing an online cloud bookkeeping system through Xero. Sleek has undoubtedly helped us grow our business.
Make an enquiry
Submit your details and we’ll get right back to you.
Ask a Sleek accountant
Our sales team is available from Mon - Fri 8am to 5:30pm (United Kingdom Time)
Book a time with our experts to guide you in finding the best solution.