Self Assessment Tax Return Services in London & Across the UK (2026)
Expert Self Assessment Accountants in Wimbledon. We file your HMRC tax return accurately and on time — every time.
⚠️ Deadline reminder: The online filing deadline for your 2024/25 Self Assessment tax return is 31 January 2026. Missing it triggers an automatic £100 penalty from HMRC.
If you are searching for a tax accountant near me, a Self Assessment accountant in London, or a reliable UK-wide online tax return service, Protax Consultants can help.
Self Assessment Tax Return Accountants in London & Wimbledon
Filing a tax return should not feel stressful or uncertain. At Protax Consultants, we handle the full Self Assessment process for individuals, sole traders, contractors, landlords, and company directors across the UK.
Whether you prefer:
- a face-to-face meeting in Wimbledon, or
- a fully remote UK online tax service,
Our team manages everything — from calculating your taxable income to submitting your SA100 return to HMRC before the deadline.
Why risk a £100 fine or overpaying tax?
Hire a professional Self Assessment accountant and file with confidence.
👉 Get Your Free Tax Return Quote
Do I Need to File a Self-Assessment Tax Return in 2026?
You must file a UK tax return for the 2024/25 tax year (6 April 2024 – 5 April 2025) if any of the following apply:
- Self-employed / Sole traders earning over £1,000 (gross)
- Landlords with rental income over £2,500
- High earners claiming Child Benefit (High Income Child Benefit Charge)
- Company directors with dividends or untaxed income
- Investors with Capital Gains Tax or foreign income
- CIS contractors claiming a CIS tax refund
If you are unsure, we will confirm whether you need to register and file before penalties apply.
Why Choose Protax Consultants for Your Self-Assessment?
We are Chartered Certified Accountants based in Wimbledon, London (SW19), serving clients across England, Wales, and Scotland.
1. Maximum Tax Efficiency
We do not just submit numbers. We review your finances carefully to ensure every legitimate allowable expense is claimed, including:
- home office allowance
- mileage and travel
- professional subscriptions
- pension and charitable relief
2. Local Expertise, UK-Wide Service
Meet us in person in Wimbledon or work with us remotely anywhere in the UK. Our secure digital portal makes uploading P60s, P11Ds, bank statements, and expense records straightforward.
3. Protection From HMRC Issues
Self-filed returns often contain small errors that trigger HMRC queries. Every return we prepare goes through a compliance check to ensure accuracy and consistency with HMRC records.
Expert insight:
“Most DIY tax returns miss valid allowable expenses. In many cases, the tax saved covers our fee.”
— Muhammad Bilal, Lead Accountant
Our 3-Step Done-For-You Tax Return Process
Step 1: Send Us Your Information
We provide a clear checklist. Upload your P60, P11D, CIS statements, bank statements, or expense spreadsheet securely.
Step 2: We Calculate & Optimise
We prepare your SA100 return, calculate Income Tax and National Insurance, and identify tax-saving opportunities.
Step 3: Review & Submit to HMRC
You approve the figures. We submit your return to HMRC well before 31 January 2026.
How Much Does an Accountant Charge for a Tax Return in the UK?
For the 2024/25 tax year, typical Self Assessment fees are:
- £150–£350 for a standard return
- Higher for complex cases (multiple income streams, property, overseas income)
Compared to a £100 late-filing penalty or lost tax relief, professional filing is usually a sensible investment.
Frequently Asked Questions
Do I need to file a Self Assessment tax return in 2026?
You must file a Self Assessment tax return for the 2024/25 tax year if you were self-employed, earning over £1,000, received rental income, earned over £60,000 while claiming Child Benefit, received dividends, had foreign income, or need to report Capital Gains Tax.
How much does an accountant charge for a Self Assessment tax return in the UK?
For a standard Self Assessment tax return, accountant fees in the UK typically range from £150 to £350. Costs may be higher if your situation involves multiple income sources, property income, or overseas earnings.
Can I file my own Self Assessment tax return?
Yes, you can file your own tax return using HMRC’s online system. However, many people choose to use an accountant to avoid mistakes, ensure that all allowable expenses are claimed, and reduce the risk of late-filing penalties or HMRC queries.
What happens if I miss the Self Assessment deadline?
If you miss the 31 January deadline, HMRC issues an automatic £100 late filing penalty. Additional daily penalties and interest can apply if the return or payment is delayed further.
What expenses can a sole trader claim on a tax return?
Sole traders can usually claim expenses such as office costs, travel and mileage, advertising, insurance, professional subscriptions, and certain home working costs, provided they are wholly and exclusively for business use.
Can Protax Consultants handle tax returns for clients outside London?
Yes. While Protax Consultants are based in Wimbledon, London, they provide fully remote Self-Assessment tax return services to clients across the UK using secure digital systems.
Meet Muhammad Bilal – Lead Accountant
Muhammad Bilal is a qualified accountant with 12 years’ experience in accounting, taxation, auditing, and business advisory.
He advises small and medium-sized businesses on:
- tax planning
- compliance
- profit extraction strategies
Bilal also manages audits for FCA-regulated clients and is a trusted adviser for ongoing tax and accounting queries.
File Your Tax Return Before the 2026 Deadline
Avoid last-minute stress and penalties. Let Protax Consultants handle your Self Assessment accurately and on time.
Protax Consultants
Lombard Business Park
8 Lombard Road
Wimbledon, London, SW19 3TZ
📞 Call: 0208 545 7451
✉️ Email: info@protax.org.uk