Accountants for Self-Employed in London
Being self-employed in London gives you freedom — but it also makes you personally responsible for every tax deadline, every record and every payment to HMRC. There is no employer payroll department to get it right for you.
AccoFirm provides specialist accounting for self-employed freelancers, contractors, consultants and tradespeople across London. We handle your Self Assessment, your allowable expenses, your bookkeeping and your Making Tax Digital compliance for one transparent fixed fee — so you keep more of what you earn and never miss a deadline.
| Why London’s Self-Employed Choose AccoFirm — Tax Year 2026/27 | |
| The Problem (DIY Tax Return) | The AccoFirm Solution |
| Hours lost every January rebuilding records | Records kept monthly in Xero, QuickBooks, FreeAgent |
| £100 late filing penalty + interest | Every deadline tracked, return filed early |
| Expenses missed, tax overpaid | Every legitimate expense identified and claimed |
| Payments on account come as a shock | Tax bill forecast months in advance, monthly set-aside plan |
| Mixed personal and business spending | Clean, separated records, HMRC-ready |
| MTD for ITSA 2026 unaware or unprepared | Fully MTD-compliant digital records from day one |
| Facing HMRC alone in an enquiry | Dedicated accountant, full enquiry support |
| What Self-Employed Accounting Includes — AccoFirm London | ||
| Service | What It Means | HMRC Impact |
| Self Assessment Return | Return prepared and filed online by 31 January | No late filing penalties |
| Expense Claims | Every allowable cost categorised and claimed | Lower tax bill, nothing overpaid |
| Digital Records | Income and expenses logged in cloud software | MTD for ITSA compliant from 2026 |
| Payments on Account | Advance payments forecast and budgeted | No January/July surprises |
| VAT Returns | Quarterly returns if VAT registered | Accurate VAT, no overclaiming |
| Tax Set-Aside Plan | Monthly % of income reserved for tax | Cash always ready for the bill |
| Year-End Review | Income, pensions and structure reviewed | Tax saved before the year closes |
Professional Accounting Services for Self-Employed Londoners
Many self-employed people file their own tax return in the early years and only call an accountant after a penalty, an HMRC enquiry, or a year where they paid far more tax than they needed to.
The reality is that a self-employed tax return is where the most money is quietly lost. Expenses go unclaimed because the rules are unclear. Payments on account come as a shock because nobody explained them. Records are rebuilt from bank statements in January because nothing was kept during the year.
A specialist self-employed accountant fixes all three problems: every legitimate expense claimed, every deadline managed in advance, and records kept properly throughout the year — not reconstructed under pressure.
“Need Professional Business Support?”
Let our experienced accountants handle the compliance and financial complexities while you focus on growing your business.
Why London's Self-Employed Choose AccoFirm
There are hundreds of accountants in London. For a self-employed person, the question is not simply who can file a tax return — it is who will make sure you never overpay, never miss a deadline, and never face HMRC alone.
AccoFirm works proactively, not reactively. We review your expenses during the year, warn you about your payments on account before they are due, tell you exactly how much to set aside for tax each month, and prepare you for Making Tax Digital well before it becomes compulsory for you.
- Dedicated accountant who knows your trade and your income pattern
- Fixed monthly fee — no hourly rates, no charge for calls or emails
- Cloud accounting on Xero, QuickBooks or FreeAgent, included in your setup
- Deadline reminders for Self Assessment, payments on account and VAT
- Full HMRC representation if you ever receive an enquiry
| DIY Filing vs AccoFirm Self-Employed Accounting | |
| Filing Your Own Return | With AccoFirm |
| File once a year, hope for the best | Proactive, year-round with deadline reminders |
| Expenses guessed or missed | Every allowable expense checked by an accountant |
| Tax bill unknown until January | Bill forecast months ahead with a set-aside plan |
| Paper receipts and spreadsheets | Cloud software with live bank feeds |
| MTD rules discovered too late | MTD-ready records before your start date |
| You deal with HMRC alone | We deal with HMRC for you |
Our Accounting Services for Self-Employed People in London
AccoFirm provides complete accounting for self-employed people in London — Self Assessment, expenses, bookkeeping, VAT and Making Tax Digital — all for one transparent fixed monthly fee.
Self Assessment Tax Returns
We prepare and file your Self Assessment tax return accurately and on time — online filing deadline 31 January. We claim every relief available to you, calculate your tax correctly the first time, and tell you your bill months in advance so there are no January surprises.
Registering as Self-Employed
Starting out? We register you for Self Assessment and Class 2 National Insurance, obtain your Unique Taxpayer Reference (UTR), set up your Government Gateway account, and make sure you understand your first deadlines from day one.
Allowable Expenses — Claimed Properly
This is where a good accountant pays for themselves. We make sure you claim everything HMRC allows for your trade, including travel, tools, home office costs and professional fees.
Bookkeeping and Cloud Accounting
Accurate, cloud-based bookkeeping using Xero, QuickBooks or FreeAgent. We set up your software, connect your bank feeds and categorise your income and expenses monthly, giving you a real-time view of your profit and exactly how much tax to set aside.
VAT Registration and VAT Returns
If your taxable turnover exceeds £90,000 in any rolling 12-month period, you must register for VAT. We monitor your turnover, register you at the right time and prepare and file your quarterly MTD-compliant VAT returns.
Making Tax Digital for ITSA
Making Tax Digital for Income Tax Self Assessment (MTD for ITSA) is the biggest change to self-employed tax in a generation. Every AccoFirm self-employed client is set up on MTD-ready software from day one.
Our Process for Self-Employed Clients in London
From your first free consultation to your first filed return, our simple six-step process gets your self-employed finances fully under control — usually within two weeks.
Free Initial Consultation
A no-obligation conversation about how you work, your income, your current records and any HMRC concerns — by phone, video call, or in person at our London office.
Fixed-Fee Proposal
Within 24 hours, a written proposal with a clear fixed monthly fee covering all agreed services. No hourly rates and no unexpected bills.
Cloud Accounting Setup
We set up or migrate your Xero, QuickBooks or FreeAgent account, connect your bank feeds, configure your expense categories and show you exactly how to use it.
Backlog Clear (If Required)
Behind on receipts, records or past returns? We bring everything up to date, process outstanding transactions and reconcile every account — typically within two weeks.
Ongoing Monthly Bookkeeping
Your records are kept up to date monthly, you receive a clear summary of your position, and we remind you of every deadline well in advance.
Quarterly Review & Annual Integration
Each quarter we review your figures and tax position. At year-end, your clean records go straight into your Self Assessment return — filed early, never at the January deadline.
Why Good Records Save the Self-Employed More Than They Cost
For a self-employed person, the cost of poor records is measured in penalties first: a Self Assessment filed late attracts a £100 fine immediately, rising to £10 a day after three months, plus interest on any unpaid tax. Every one of these charges is entirely avoidable with records kept properly through the year.
The second cost is quieter but usually bigger: tax overpaid because expenses went unclaimed. Travel, tools, home office costs, professional fees and equipment purchases all reduce your taxable profit — but only if they are identified, evidenced and claimed on your return. Without a system, thousands of pounds in legitimate relief simply never get claimed.
The third cost is cash flow: payments on account that arrive as a shock because nobody forecast them. With AccoFirm, your tax is forecast months ahead, a monthly set-aside percentage is agreed, and your return is filed early — so good records cost far less than the penalties, overpaid tax and stress they prevent.
| Cost of DIY vs Professional Accounting — Self-Employed London | ||
| Risk | Financial Cost | AccoFirm Solution |
| Self Assessment filed late | £100 + interest | Return filed early, zero penalties |
| Still late after 3 months | £10/day, up to £900 more | Deadline reminders + filing |
| Expenses unclaimed | £500–£5,000+/yr overpaid tax | Every legitimate deduction claimed |
| Payment on account missed | Interest + penalties | Forecast and budgeted monthly |
| HMRC enquiry, poor records | £5,000–£50,000+ at stake | MTD-compliant records, enquiry support |
| Not MTD-ready (from 2026) | Quarterly penalties | Digital records structured fully compliant |
| AccoFirm accounting from: | Fixed monthly fee | All above risks eliminated |
“Need Professional Business Support?”
Let our experienced accountants handle the compliance and financial complexities while you focus on growing your business.
| Self-Employed Key Dates — AccoFirm London | |
| Register for Self Assessment | by 5 October |
| File online return + pay | 31 January |
| Payment on account 2 | 31 July |
| Paper return | 31 October |
| MTD quarterly updates | from April 2026 if income over £50,000 |
Integrated Accounting for the Self-Employed in London
Good tax planning for the self-employed starts with setting aside the right percentage of every invoice for tax, so the January bill never comes as a shock. We calculate your personal set-aside percentage and review it quarterly.
We also make your money work harder: pension contributions to reduce your tax bill, timing equipment purchases to use allowances efficiently, and claiming losses correctly — including carrying them back or forward.
And we keep your structure under review. Each year we assess whether incorporating as a limited company would save you tax — and we are honest when it would not.
frequently Asked Question
When do I need to register as self-employed?
You must register for Self Assessment by 5 October in your business’s second tax year at the latest — but you should register as soon as you start trading. If your trading income is £1,000 or less in a tax year, the trading allowance may mean you do not need to register. We will confirm your position free of charge.
How much tax will I pay as self-employed?
You pay Income Tax on your profit (income minus allowable expenses), not on your turnover. For 2025/26, after the £12,570 Personal Allowance, Income Tax is generally 20% at the basic rate, 40% at the higher rate and 45% at the additional rate. Most self-employed people also pay Class 4 National Insurance — 6% on profits between £12,570 and £50,270, and 2% above that. We calculate your exact position for your circumstances.
What is Making Tax Digital and does it affect me?
MTD for ITSA replaces the single annual return with digital record-keeping and quarterly updates. It starts on 6 April 2026 if your qualifying income from self-employment and/or property is over £50,000, then from April 2027 for income over £30,000. If you are an AccoFirm client on cloud software, we manage this transition for you.
Can I claim expenses for working from home?
Yes. You can either claim a proportion of your actual household costs (heating, electricity, broadband, rent or mortgage interest, based on business use) or use HMRC’s simplified flat-rate expenses. We work out which method gives you the larger claim.
I am employed as well as self-employed — can you handle both?
Yes, this is very common in London. Your employment income and tax paid under PAYE are included in the same Self Assessment return as your self-employed income, and we make sure you are not taxed twice on the same income.
How much does a self-employed accountant cost?
Our fees are fixed monthly and agreed in writing before any work begins, based on your transaction volume and the services you need. There are no hourly rates and no extra charge for calls or emails. Contact us for a free, no-obligation quote.
How much should I set aside for tax each month?
As a starting guide, many self-employed people set aside 20–30% of their profit, but the right figure depends on your profit and other income. We calculate your personal set-aside percentage at onboarding and review it quarterly.
I'm behind with my tax returns — can you still help?
Yes. Bringing late returns and records up to date is one of our most common jobs. We file outstanding returns, deal with HMRC about penalties, and set you up so it never happens again.