Tax implications of sole proprietor
Above all, sole proprietorships are simple to establish. In contrast to other business structures like partnerships, limited liability companies (LLCs),…
Stop Overpaying Tax. Start Growing With Confidence.
AccFirm — Chartered Accountants in London Serving SMEs, Startups & Property Investors Across the UK
We are a London-based accountancy firm of qualified chartered accountants and UK tax advisers who do more than just file your numbers. We turn your financial data into clear, actionable decisions and handle every interaction with HMRC so you never have to worry about compliance again.
Whether you are a founder scaling your first limited company, a landlord managing a property portfolio, or an established SME ready for the next stage. AccFirm delivers the proactive, strategic support that traditional London accountancy firms simply do not offer.
What Our Clients Say About AccFirm
We’ve been working with this accounting team for over two years, and the difference has been incredible. From bookkeeping and VAT returns to corporation tax planning, everything is handled efficiently and on time. They keep us fully compliant with HMRC while helping us improve cash flow and profitability. I highly recommend their services to any business owner.
Sarah Thompson
Thompson Retail Ltd
As a contractor under the Construction Industry Scheme (CIS), I needed accountants who truly understand HMRC requirements. They managed my CIS registration, monthly returns, and self-assessment without any stress. Their guidance saved me both time and money. Professional, reliable, and always available when needed
James Patel
Self-Employed Contractor (CIS)
As a contractor, managing taxes and expenses can be complicated. Their support with self-assessment and bookkeeping has saved me time and reduced my tax stress. Everything is explained clearly, and the service is always prompt and professional
Daniel Carter
Freelancer & Contractor
0
%
MTD Ready
0
%
Growth Rate
0
%
Client Satisfaction
Your Accountant Should Work For Your Future, Not Just Your Past
Most London accountancy firms are reactive they process last year’s figures and send you a bill. AccFirm is built differently. We combine the rigour of a fully qualified corporate accountancy practice with the forward-thinking approach of a strategic business partner.
Proactive Tax Planning: We review your tax position throughout the year not just at year-end. Our qualified corporate accountants identify every legitimate relief available so you pay the right amount of tax, not a penny more.
Dedicated Account Manager: You will always have one named point of contact who knows your business inside out. No call centres. No being passed from pillar to post. Just clear, consistent communication from a senior professional who genuinely cares about your results.
Transparent Flat-Fee Pricing: You will receive a fixed monthly fee from day one agreed in advance, with zero hidden charges. Every service is clearly itemised so you always know exactly what you are paying for and why.
Cloud-First, Digital Accountancy: We are fully proficient in Xero, QuickBooks, and Sage ensuring your books are real-time, Making Tax Digital (MTD) compliant, and always available to you on any device.
A Complete Accountancy & Advisory Suite — All Under One Roof
From day-to-day compliance to long-term strategic growth, our London accountancy firm offers a comprehensive range of services. Each handled by qualified professionals who understand the real-world pressures you face.
We provide accurate and reliable bookkeeping services to keep your financial records up to date. From daily transaction recording to bank reconciliations and expense tracking, we ensure your accounts are organised and compliant with HMRC requirements.
We prepare and file your statutory limited company accounts and CT600 corporation tax return with Companies House and HMRC accurately, on time, and with a full pre-filing review of your tax position. Beyond compliance, we actively identify reliefs such as R&D credits, capital allowances, and director salary structures to reduce your liability wherever the law allows.
Whether you are a sole trader, company director, landlord, or high earner, our UK tax advisers will ensure your Self-Assessment is completed correctly and submitted well ahead of the HMRC deadline. We also provide year-round personal tax planning from income extraction strategies to pension contributions to ensure your overall tax burden is as efficient as possible.
We manage your full VAT cycle from registration and scheme selection (Flat Rate, Cash Accounting, Standard) through to accurate, on-time return submission via MTD-compatible software. As HMRC’s Making Tax Digital requirements continue to expand, you can rely on AccFirm to keep your business fully compliant and audit-ready at all times.
Monthly or quarterly management accounts give you real-time visibility over cash flow, profitability, and performance against budget enabling confident, data-driven decisions rather than gut instinct. Our business advisory service goes further, offering financial forecasting, KPI reporting, and strategic guidance as you scale, seek investment, or plan an exit.
Our managed payroll service handles RTI submissions, P60s, P11Ds, and auto-enrolment pension administration so you never risk HMRC penalties through a missed deadline. For businesses operating in the construction sector, we provide specialist CIS compliance support, including accurate contractor and subcontractor deductions, monthly returns, and annual CIS certificate management.
“Need Professional Business Support?”
Let our experienced accountants handle the compliance and financial complexities while you focus on growing your business.
We Speak Your Industry's Language
Generic accounting advice has limits. AccFirm brings deep sector knowledge to every client relationship because the tax, compliance, and growth challenges facing an e-commerce brand look nothing like those of a property investor or a construction subcontractor.
E-Commerce & Digital Retail: Cross-border VAT, marketplace seller obligations, inventory accounting, and platform-specific integrations.
Property Investors & Landlords: Buy-to-let tax planning, Section 24 mortgage interest relief, capital gains tax on disposals, and SDLT advice for portfolio structuring.
Tech Startups & SaaS Founders: SEIS/EIS investor readiness, R&D tax credits, share scheme structuring (EMI), and fundraising financial modelling.
Construction & Trade Contractors: End-to-end CIS compliance, subcontractor payment management, VAT reverse charge handling, and project cost reporting.
SME Retail & Hospitality: TRONC schemes, tip pooling compliance, multi-site payroll, EPOS integration with cloud accounting, and VAT margin schemes.
Switching to AccFirm Is Easier Than You Think — We Handle Everything
We know what holds businesses back from switching accountants: the fear of lost records, awkward conversations with a previous provider, or a chaotic handover period. At AccFirm, we have developed a structured, three-step onboarding process that eliminates every point of friction.
Step 1 — We Contact Your Previous Accountant:
Once you instruct us, we send a professional clearance letter to your existing accountant on your behalf and request all relevant books, records, and working papers. You do not have to make a single call.
Step 2 — We Notify HMRC & Companies House:
Our team updates your agent authorisations with HMRC and ensures all Companies House filings reflect AccFirm as your registered accountant seamlessly and without disruption.
Step 3 — Your Account Manager Conducts a Full Financial Review:
Before we touch a single filing, your dedicated account manager reviews your full financial history, identifies any outstanding risks or missed opportunities, and presents you with a clear 12-month compliance calendar.
AccFirm Blogs
Gain valuable financial insights and stay informed on the latest UK tax updates with expert resources for business owners.
What is my accounting office reference number?
The letter you received from HMRC when you initially registered as an employer will display your Accounts Office Reference Number,…
Hurdles of Budgeting: Limits and Pitfalls
Budgeting affects employee motivation through behavioral changes. If budgets are imposed instead of negotiated, they demotivate people. De-motivation increases when…
Accounting Softwares
Get Expert Accounting Support Today
Need reliable accountants for your business? Our experienced team is ready to help with tax planning, compliance, and financial advice. Contact us today to discuss your needs and grow your business with confidence.
Faqs about Chartered Accountants in London
What services do UK accountants provide?
AccFirm provides a complete range of UK accounting and tax services including bookkeeping, Self-Assessment tax returns, corporation tax, VAT returns, payroll and PAYE management, company formation, Making Tax Digital compliance, tax planning, and business advisory. We serve sole traders, limited companies, startups, LLPs, landlords, and contractors across the United Kingdom.
How do I choose the right accountant in the UK?
Look for recognised professional qualifications such as ACA, ACCA, ATT, or AAT, alongside experience with your specific business type whether you are a sole trader, limited company, or LLP. Transparent fixed fees, Making Tax Digital compatibility, and a clear communication style are also important factors. AccFirm offers a free initial consultation so you can assess the service with no obligation.
What does an accountant do?
An accountant manages your financial records, prepares and files tax returns, produces annual statutory accounts, handles all HMRC and Companies House submissions, and provides strategic financial advice. AccFirm also provides proactive tax planning, cloud accounting setup, MTD compliance, and year-round advisory support not just year-end compliance.
Why should I hire an accountant?
A professional accountant saves significant time, reduces the risk of HMRC penalties, ensures every allowable expense is claimed, and provides access to year-round tax-saving advice. For most businesses, an accountant saves more in reduced tax liabilities and avoided penalties than the cost of the service itself making it one of the most financially sound investments a business owner can make.
What is the difference between a reactive and a proactive accountant?
A reactive accountant processes your historical data they collect your records at year-end, prepare your accounts, file with HMRC, and issue an invoice. While this satisfies your legal obligations, it offers no strategic value.
A proactive accountant, like AccFirm, reviews your financial position regularly throughout the year and advises on tax-saving opportunities before they close. This might include timing the payment of dividends, making pension contributions ahead of key thresholds, or structuring asset purchases in the most tax-efficient period. The practical difference is often thousands of pounds in avoidable tax and the peace of mind that comes from never being surprised by an unexpected bill.
How does AccFirm help legally minimise my corporation tax bill?
We take a multi-layered approach to corporation tax planning. Firstly, we ensure every allowable business expense is correctly captured and claimed including home office costs, mileage, professional subscriptions, and equipment. Secondly, we review your eligibility for R&D Tax Credits if your business undertakes any qualifying innovation or product development.
Thirdly, we advise on the optimal mix of salary and dividends for directors to minimise the combined income tax and National Insurance liability. Finally, we assess whether timing adjustments for capital expenditure or pension contributions would reduce the taxable profit in a given accounting period. All planning is strictly within HMRC guidelines. We help you pay the right amount of tax, nothing more.
What software do you support for Making Tax Digital (MTD)?
AccFirm is proficient in all leading MTD-compatible cloud accounting platforms, including Xero, QuickBooks Online, and Sage Accounting. We will recommend the most appropriate platform for your business size, sector, and workflow and handle the initial setup, chart of accounts configuration, and bank feed integration on your behalf.
If you already use a preferred system, we can work within it. Our goal is to give you live, accurate financial data at your fingertips while ensuring every VAT return, income tax update, and corporate filing is submitted to HMRC through a fully MTD-compliant route.
What is the difference between an accountant and a bookkeeper?
A bookkeeper records and categorises daily financial transactions sales, purchases, and bank reconciliations. An accountant uses this data to prepare tax returns, statutory accounts, and financial reports, and provides strategic tax and business planning. AccFirm provides both bookkeeping and full accounting services, with a dedicated professional managing both functions for each client under a single fixed monthly fee.
Can an accountant help reduce my tax legally?
Yes. AccFirm uses fully legitimate tax planning strategies to ensure every client pays only the minimum tax required by law. This includes identifying all allowable expenses and reliefs, optimising salary and dividend structures for company directors, advising on pension contributions as a tax-efficient strategy, timing capital expenditure to maximise Annual Investment Allowance, and planning ahead of significant business events such as asset sales or company disposals.
What is Making Tax Digital and does it affect my business?
Making Tax Digital (MTD) is HMRC’s programme requiring all businesses and individuals to maintain digital financial records and submit returns using HMRC-approved software. MTD for VAT is already mandatory for all VAT-registered businesses. MTD for Income Tax Self Assessment (MTD for ITSA) is being introduced from April 2026, initially applying to sole traders and landlords with income above £50,000, with further thresholds following. AccFirm ensures every client is fully MTD-compliant using Xero, QuickBooks, or FreeAgent at no additional cost.
How do I switch my business accountant to AccFirm?
The process is straightforward and fully managed by our team. After an initial consultation where we agree on the scope of services and fixed fee, you sign a letter of engagement. We then issue a professional clearance letter to your outgoing accountant, obtain all relevant records, update your HMRC agent authorisations, and register as your agent at Companies House.
You do not need to contact your previous accountant, manage any paperwork, or worry about gaps in your compliance calendar. Most businesses are fully transferred and actively managed by AccFirm within five working days.
Are AccFirm accountants fully qualified and chartered?
Yes. AccFirm is staffed by fully qualified, chartered accountants holding recognised professional qualifications (ACA/ACCA). Our practice is regulated in line with HMRC’s agent standards and all members of our team undertake ongoing Continuing Professional Development (CPD). This means your accounts, tax returns, and financial advice are always prepared and reviewed by professionals who are held to the highest standards of accuracy, ethics, and accountability in the UK accountancy sector.