File Self Assessment Tax Return
Self Assessment Tax Return Filing from £299
Fixed Fee Self Assessment Tax Return Filing Service
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Small Self Assessment £299
Our basic self assessment tax return service. If you have Rental, Savings, Dividends, PAYE & Capital Gains up to £30,000 then this is the one for you! Average turnaround is 7–14 days.
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Medium Self Assessment £499
Our intermediate self assessment tax return service. If you have Rental, Savings, Dividends, PAYE & Capital Gains up to £100,000, we can still do you a good deal and file your tax return.
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Large Self Assessment £699
Our premium self assessment tax return service for individuals with Rental, Savings, Dividends, PAYE & Capital Gains up to £250,000. If your tax affairs are more complicated please ask for a quote.
Sef Assessment Tax Return Filing Made Simple
One complete tax return service. One expert team. Choose the price band that matches your self assessment size.
What’s Included – No Add-Ons. No Surprises.
Select Your Self Assessment Size
Pricing is based on total rental income, savings income, dividends, PAYE and capital gains — the service remains exactly the same.
Here’s what to expect after you have placed your order
Our welcome message will request ID documents for AML checks and an engagement letter to sign online.
Register with our secure portal and upload ID documents and details of all income and capital gains.
Grant access to your bookkeeping software for rental income or upload spreadsheets securely via the portal.
We prepare your tax return, calculate income tax, calculate capital gains tax and then upload for your review and approval.
After your digital approval, we file your tax return securely to HMRC. You then simply pay any tax due as advised.
Affordable, Accurate, and Stress-Free Tax Return Filing
Filing your Self Assessment Tax Return with HMRC doesn’t need to be stressful or expensive. At The Online Accountants, we offer a fixed-price service that takes care of the entire process — from gathering your figures to submitting your return directly to HMRC — giving you peace of mind that everything is handled correctly and on time.
We specialise in working with:
Self-employed sole traders
Company directors
Landlords and property investors
Freelancers and contractors
Individuals with multiple income sources
Why Choose Our Fixed-Price Self Assessment Service?
1. Transparent, Fixed Pricing — No Surprises
You’ll know exactly what your Self Assessment filing will cost before we start. There are no hidden fees or hourly rates — just one clear price that covers everything.
2. Expert Accountants with Years of Experience
Our team has filed thousands of Self Assessment Tax Returns for clients across the UK, including more complex cases involving capital gains, dividend income, and overseas income.
3. Fully HMRC-Compliant Submissions
We use secure, HMRC-approved software to ensure your return is filed accurately and on time, reducing the risk of penalties or HMRC enquiries.
4. Online, Hassle-Free Process
No need for office visits. We handle everything remotely, using secure document uploads and email/phone communication, saving you time and effort.
What’s Included in Our Fixed-Price Self Assessment Package
| Service feature | Included |
|---|---|
| Review of income & allowable expenses | Yes |
| Calculation of tax liability (incl. NICs where applicable) | Yes |
| Completion of Self Assessment (SA100) & supplementary pages | Yes |
| Filing directly with HMRC | Yes |
| Advice on tax-saving opportunities | Yes |
| Email & phone support | Yes |
Who Needs to File a Self Assessment Tax Return?
| Reason for filing | Examples |
|---|---|
| Self-employment income | Earning over £1,000 before expenses as a sole trader or freelancer |
| Company director | Receiving salary, dividends, or benefits in kind from your own company |
| Rental income | Income from UK or overseas property, even if below the personal allowance |
| Foreign income | Earnings, pensions, or investments from outside the UK |
| Dividends & investments | Significant income from shares, funds, or savings interest |
| Capital gains | Selling property, shares, or other assets above the annual exemption |
If you’re unsure whether you need to file, we can advise you before starting.
| Deadline type | Date |
|---|---|
| Paper return deadline | 31 October following the end of the tax year |
| Online return deadline | 31 January following the end of the tax year |
| Tax payment deadline | 31 January (and 31 July for payments on account) |
Missing these deadlines can lead to automatic £100 fines and interest charges — another reason to let professionals handle it for you.
How Our Process Works
Contact Us — We’ll confirm your fixed price and send our engagement letter.
Send Us Your Information — Securely upload your income and expense details.
We Prepare Your Return — Our accountants review everything, claim all allowable expenses, and calculate your tax bill.
You Approve & We File — Once approved, we submit directly to HMRC and confirm filing.
Our Fixed-Price Promise
Our fee covers:
Complete return preparation & filing
All necessary schedules & supplementary pages
Tax efficiency review to ensure you’re not overpaying
Full support if HMRC has queries about your return
No extra charges for “quick questions” or minor amendments — it’s all included.
| Type of client | Typical starting fee (GBP) |
|---|---|
| Simple sole trader (basic income & expenses) | From £399 |
| Landlord | From £299 |
| Company director (dividends, salary) | From £299 |
| Complex returns (foreign income / capital gains) | From £499 |
Why Clients Trust The Online Accountants
Fully qualified & regulated UK accountants
Proven track record with thousands of satisfied clients
Secure data handling in line with GDPR
Clear communication without jargon
Get Your Self Assessment Filed — The Easy Way
Avoid the stress, save time, and know your Self Assessment Tax Return is handled by experienced professionals — all for one fixed, affordable fee.
Order Self Assessment Tax Return FAQs
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A fixed-price Self Assessment tax return filing service means you pay one agreed fee for the entire process, from reviewing your income and expenses to submitting your completed return to HMRC, with no hidden extras or hourly charges.
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You must file a Self Assessment tax return if you are self-employed and earn more than £1,000 before expenses, a company director, a landlord, have foreign income, significant dividends or investment income, or capital gains above the annual allowance.
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You’ll need records of your income, business expenses, bank interest, dividends, rental statements, pension income, foreign earnings, and any capital gains. If unsure, we provide a simple checklist to make sure nothing is missed.
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The paper return deadline is 31 October following the end of the tax year, and the online return deadline is 31 January. Tax payments are also due by 31 January, with a second payment on account (if applicable) by 31 July.
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Our fixed-price packages start from £399 for simple sole trader returns, £199 for company directors, £199 for landlords, and £349 for complex cases involving foreign income or capital gains.
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Yes. As part of our service, we review your circumstances for tax-saving opportunities, such as allowable expenses, reliefs, and deductions you may not be aware of, helping you pay the correct amount of tax and no more.