HMRC-registered self-assessment specialists for sole traders, freelancers, landlords, CIS subcontractors, company directors and high earners across England, Scotland, Wales and Northern Ireland. SA100 returns, payments on account, expense reviews and HMRC compliance, from a fixed monthly fee.
Self-Assessment Accountant — UK
Self-assessment is the system HMRC uses to collect income tax from people whose tax is not collected at source through PAYE alone. Around twelve million UK taxpayers file an SA100 return each year, and the criteria for needing one keep widening as more people work freelance, run side businesses, own rental property, or earn above the higher and additional rate thresholds. For most, the process is more involved than HMRC's plain-language guidance implies, and the cost of small mistakes can run into thousands of pounds in lost relief, missed expense claims, miscalculated payments on account, or penalties for late or inaccurate filing.
Your Tax Help Accountants is an HMRC-registered agent practice headquartered in Stanmore, North West London, but operating as a fully online firm serving clients across the United Kingdom. From sole traders in Cornwall to property landlords in Aberdeen, CIS subcontractors in Belfast to high-earner consultants in Edinburgh, the workflow is the same: a free fifteen-minute call to scope your situation, a fixed quote with no hidden extras, secure document upload through our client portal, a full review of the last four years of returns for new clients to identify potential refunds, and a filed return well in advance of the deadline. The accountant who scopes your case is the same accountant who files it.
If your tax position has changed in the last twelve months — new self-employment income, a property let, a director role, a CIS card, a pension drawdown, foreign income, capital gains, or income approaching £100,000 — the chances are an accountant will save you significantly more than the fee. Most new clients are surprised by what the previous return missed.
What We Handle
Complete self-assessment return covering every income source: self-employment, employment, rental, dividends, foreign income, capital gains, pension drawdown and savings interest. Every legitimate deduction captured, filed accurately, ahead of the 31 January deadline.
Payments on account properly calculated and explained, with reduction claims submitted where your income has fallen, so January and July balancing payments never come as an unwelcome surprise.
Line-by-line expense review identifying everything you can legitimately claim: home office, mileage, professional subscriptions, equipment, training, pre-trading expenditure, capital allowances and the often-missed minor items that quietly add up.
Rental income, finance cost relief under Section 24, allowable expenses, replacements of domestic items, mortgage interest tax credit, capital gains on disposals, and incorporation analysis where it makes sense.
CIS-deducted income reconciled to subcontractor statements, refund position calculated, expenses maximised, payments on account managed. Most CIS subcontractors are owed money. We make sure HMRC pays it.
Returns for income above £100,000 where the personal allowance tapers, pensions tax relief, dividend planning, EIS and SEIS investments, charitable giving, salary sacrifice and the High Income Child Benefit Charge are all in scope.
Late filings, multi-year arrears, missing UTRs, penalty letters, HMRC enquiries and Time to Pay arrangements. We have brought hundreds of taxpayers back into compliance — and successfully appealed penalties where there was a reasonable excuse.
Standard part of onboarding: we review your last four years of returns to identify overpayments, missed expense claims and overpayment relief opportunities. Most new clients receive a refund within their first month.
We deal with HMRC on your behalf. Penalty appeals, enquiry responses, status disputes, IR35 queries, repayment chases and the inevitable letters that arrive in brown envelopes. You don't need to phone the helpline again.
The single most expensive mistake UK taxpayers make is filing late. An immediate £100 penalty applies even if no tax is due, with daily penalties from three months, percentage-based penalties at six and twelve months, and interest plus 5% surcharges on unpaid tax at thirty days, six months and twelve months. We take last-minute cases right up until the final week of January every year and have a same-day filing service for emergencies. The earlier you start, the more we can save.
Recent Client Outcome
A management consultant based in Bristol came to us in November having filed her own self-assessment returns for three consecutive years. She had reasonable confidence in HMRC's online service and had captured the basics, but her income had grown to around £92,000 and the returns had become more complex than the portal handled cleanly.
We reviewed all four prior years. The previous returns had missed: pre-trading expenditure for her first year, the full home-office calculation including a proportionate share of council tax and utilities, mileage at the correct HMRC rates, professional indemnity insurance, contributions to a SIPP that had not flowed through, and a Marriage Allowance transfer that her partner had been eligible to make but never elected. Amended returns were filed for the two open years; overpayment relief claims were submitted for the two earlier years.
Total recovered from HMRC: £4,180. Total saved going forward through correct ongoing treatment: approximately £1,400 per year. Engagement fee: £450. The next return was filed cleanly on her behalf, and we have continued as her self-assessment accountant since.
Why Clients Choose Us
Self-Assessment Questions Answered
Free fifteen-minute consultation. Fixed quote within twenty-four hours. Same-day filing available right up to the deadline. Wherever you are in the UK, your return is handled by the same HMRC-registered accountant from start to finish.
Or email info@yourtaxhelp.co.uk — we typically respond within two business hours.