Self Assessment tax returns in Harmondsworth — from £129, fixed.
Online Self Assessment done properly for Harmondsworth: we prepare the return, you approve it, we file it with HMRC. A single fixed fee, no hourly billing — serving Harmondsworth and the surrounding West London area including Sipson, Longford, Heathrow Villages.
Self Assessment Tax Returns for Harmondsworth — done properly, entirely online
Sole traders, freelancers, landlords, company directors, higher earners and anyone in Harmondsworth who's been asked by HMRC to file a return — including first-time filers who've just gone self-employed.
What's included
- Full SA100 return prepared and filed with HMRC
- All supplementary pages your situation needs — self-employment, property, dividends, CGT
- Your tax liability checked and explained in plain English
- Payments on account calculated so there are no surprises
- Deadline reminders so you never miss 31 January
What Harmondsworth gets with Bohzo Accountants
Your fee is agreed before any work starts and never changes mid-job. No hourly billing, ever.
We track every HMRC and Companies House date that applies to you, so you don't have to.
Bohzo Accountants trades as Bohzo Ltd, registered in the UK under Company No. 15031604 — check us on Companies House any time.
Records in over the portal or WhatsApp, approvals from your phone, filings sent electronically — Harmondsworth to HMRC without a single appointment.
Compare our fixed self assessment tax returns fees
| Your situation | Fixed fee |
|---|---|
| Straightforward return — one income source | £129 |
| With rental property income | £169 |
| With capital gains (property, shares, crypto) | £199 |
| Late-return rescue — filed fast, penalties appealed where possible | £179 |
“From” pricing reflects the simplest case; anything more complex is quoted as a fixed fee in writing before work begins — and never changes after.
Online accountants vs the high street
Traditional firms around West London still run on hourly billing, office appointments and fees you discover after the work. Our model inverts that: the fee is fixed and written down before work begins, questions are part of the service rather than billable events, and everything happens online — the reason Harmondsworth pays the same as everywhere else.
There's no office to fund in Harmondsworth and no office to visit: records travel through our secure portal or WhatsApp, approvals happen on your phone, and filings go to HMRC and Companies House electronically. You get the same qualified work — minus the overheads, the travel and the surprises on the invoice.
Self Assessment Tax Returns in Harmondsworth: from first message to filed
Start with a message — no forms, no phone queue. Tell us what needs doing and we take it from there.
One fixed price before any work starts. Complex case? We say so now, not on the invoice.
The legal bits — ID verification, engagement letter — happen online in minutes, then your records come in via the portal or WhatsApp.
We prepare, you check and approve, we submit — and you get the HMRC confirmation the same day it's filed.
The same service in Harmondsworth as anywhere — by design
Whether your business trades from Harmondsworth itself or you simply live there and work everywhere, the tax rules are national — and so are we. Harmondsworth clients get the same preparers, the same fixed fees and the same deadline tracking as every other town on this site.
Being in London, Harmondsworth clients often come to us comparing against firms charging central-London rates for the same compliance work. The work is identical; the overheads aren't — and since we carry no premises anywhere, our fees don't care about postcodes.
Where we work around Harmondsworth
Harmondsworth sits in the borough of Hillingdon (Heathrow Villages ward), UB7 postcode area. If you're comparing local options from Harmondsworth, it helps to see the map the way we do — one service area, no travel involved.
| Nearby | Distance from Harmondsworth | Direction |
|---|---|---|
| Sipson | 0.8 miles | east |
| Longford | 0.8 miles | south-west |
| Heathrow Villages | 1.1 miles | south-east |
| West Drayton | 1.1 miles | north |
| Thorney | 1.4 miles | north-west |
Distances are straight-line, between place centres. Every listed place — and everywhere between — is served online at the same fixed fees.
Self Assessment Tax Returns deadlines
| Date | What happens |
|---|---|
| 5 Oct 2026 | Deadline to register for Self Assessment if you're newly self-employed |
| 31 Oct 2026 | Paper return deadline (almost nobody should be filing on paper) |
| 31 Jan 2027 | Online filing deadline and balancing payment due — miss it and HMRC charges an automatic £100 penalty |
| 31 Jul 2027 | Second payment on account due, if you make them |
Harmondsworth self assessment tax returns FAQs
What does the £129 fee include?
Preparation and online filing of your full SA100 return, including the supplementary pages your situation needs. If your return is more complex — rental income, capital gains — the packages above show the fixed price, and we confirm it in writing before starting.
I've missed the deadline — can you still help?
Yes. Late returns are common and fixable: we prepare and file the outstanding return quickly, and where there's a reasonable excuse we help you appeal penalties. The sooner it's filed, the sooner the penalties stop growing.
What records do I need to send you?
Income records (invoices, statements, P60/P45 if employed), expense records, and any letters from HMRC. Not sure what counts? Send what you have through the portal and we'll tell you exactly what's missing — chasing paperwork is part of the job.
Do I need to visit an office in Harmondsworth?
No — there's nothing to visit and nothing to print. We're an online firm: records go through our secure portal or WhatsApp, and everything is filed electronically. It works the same whether you're in Harmondsworth or anywhere else in West London.
I searched "self assessment near me" — is this service really local to Harmondsworth?
Harmondsworth is fully covered, yes. The work is done online, which in practice means more local than an office: same-day replies instead of appointment slots, and the same published fixed fee whether you're in Harmondsworth town centre or the edge of West London. If you'd rather talk it through first, WhatsApp us — a real person answers.
Who will actually handle my self assessment?
Bohzo Accountants — a trading name of Bohzo Ltd, a registered UK company (No. 15031604). You get a named contact, a fixed fee in writing, and nothing is filed until you've reviewed and approved it.
How do your fixed fees work?
You tell us your situation, we quote one fixed price in writing before any work starts, and that price never changes mid-job. If your case is unusually complex we'll say so up front and agree a different fixed price — but the fee is always agreed before we begin, never after.
Tax, briefly — the parts that affect Harmondsworth
Most HMRC letters are routine — a statement, a code change, a reminder. The rule is simple: never ignore one, and never panic over one. Forwarded to your accountant the day it arrives, almost every letter is a five-minute job.
Crypto traders rack up hundreds of taxable events without noticing, because every swap counts as a disposal. Specialist software plus the pooling rules turns the mess into a number; guessing does not.
Can't pay the bill by the deadline? File anyway. Filing and payment are penalised separately, and HMRC's Time to Pay arrangements can spread the bill — but only once the return is in. Not filing because you can't pay turns one problem into two.
Selling a rental property triggers capital gains tax with a tight reporting window — UK residential sales must be reported and the tax paid within 60 days of completion. It's one of the easiest deadlines in the whole system to miss, and one of the most penalised.
Plenty of people incorporate too early because it "sounds established", then pay for accounts, confirmation statements and payroll they didn't need. The switch pays for itself at the right profit level — the trick is knowing yours.
MTD for Income Tax starts with the £50,000+ income group in April 2026, with lower bands following. Quarterly digital updates sound worse than they are — with software doing the bookkeeping, the quarters largely take care of themselves.
Filing early doesn't mean paying early: submit a return in May and the tax is still not due until the usual dates. Early filing buys certainty, refund speed and time to arrange payment — it costs nothing.
Status under IR35 turns on the reality of the engagement: control, substitution, mutuality of obligation. Contracts matter, but working practices matter more. A written status assessment for each engagement is cheap insurance.
General guidance, not personal advice — thresholds and dates change. For advice on your own position in Harmondsworth, message us and we'll answer against your actual numbers.
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