Self-employed? You’re not just running a business – you’re battling late payers, confusing IR35 rules, and that nagging fear you’ve missed a key HMRC deadline.
Sound familiar?
You went freelance for freedom – not to become a part-time bookkeeper.
Sigma Chartered Accountants & Tax Advisors specialises in accounting for contractors and freelancers like you. We’re not just any accountants – we’re your IR35 allies, your tax efficiency partners, and your late-payment wranglers.
72% of contractors miss legitimate expense claims, 1 in 3 freelancers face penalties for late filings, and IR35 changes have left thousands unnecessarily taxed as employees.
At Sigma Chartered Accountants & Tax Advisors, we’re not just another accounting firm – we’re specialist online accountants for contractors who’ve helped over 1,200 UK freelancers and contractors:
72% of contractors miss legitimate expense claims, 1 in 3 freelancers face penalties for late filings, and IR35 changes have left thousands unnecessarily taxed as employees.
At Sigma Chartered Accountants & Tax Advisors, we’re not just another accounting firm – we’re specialist online accountants for contractors who’ve helped over 1,200 UK freelancers and contractors:
We don’t believe in one-size-fits-all accounting. As specialist accountants for freelancers and contractors, we’ve designed a streamlined approach that adapts to your workflow – saving you time, maximising tax efficiency, and keeping HMRC off your back.
We’ll analyse your current setup, identify tax savings, and recommend the most efficient structure (Limited Co, Umbrella, or Sole Trader).
Get a definitive assessment of your contracts with our IR35 Shield™ system – including defence strategies if HMRC comes knocking.
For limited companies, we optimise your salary/dividend split to legally minimise tax and NIC contributions.
Proactive reviews to adjust your tax position, claim missed expenses, and avoid year-end surprises.
We’ll implement user-friendly tools like Xero or FreeAgent that automate invoicing, expenses, and VAT – with training included.
One named expert who understands your industry (IT, creative, construction etc.) – no call centres or junior staff.
We manage all filings (Self Assessment, VAT, CIS, PAYE) and act as your shield against enquiries.
Beyond compliance, we’ll analyse your financial trends and recommend profit-boosting strategies.
As specialist accountants for freelancers and contractors, we know compliance is just the starting point. Your real need? A financial partner who handles the paperwork while finding every legal advantage in your unique situation. Whether you’re a sole trader wrestling with Self Assessment or a limited company director optimising dividend strategies, we bridge the gap between HMRC obligations and maximising your take-home pay.
A creative freelancer’s finances look nothing like an IT contractor’s, and a construction subcontractor faces completely different challenges than a management consultant. That’s why we’ve developed specialist accounting solutions tailored to your specific way of working. No generic advice. No guesswork. Just expert support designed for your industry’s unique financial landscape.
Expense tracking for project costs, VAT scheme
optimisation
CIS compliance, materials accounting, subcontractor management
Locum tax planning, pension advice, expense claim maximisation
International business tax issues, monthly retainer income structuring
IR35 contract reviews, SDS assessments, tech-stack integrations
CIS payroll processing and compliance, plant & equipment capital allowances review
FCA regulatory compliance guidance, Executive bonus structuring strategies, off-payroll rules
Multi-company directorship planning, travel expense compliance
You didn’t go self-employed to waste time on accounting headaches. Here’s why over 1,200 UK freelancers and contractors trust us as their long-term financial partner.
Unlike high street firms who treat you as “just another client”, we only work with self-employed professionals. That means IR35 expertise, sector-specific deductions, and advice that actually fits your reality.
We don’t just file your returns – we identify tax savings opportunities quarterly, adjust your salary/dividend mix as rules change, and ensure you never overpay.
One named expert who knows your business inside out, backed by VAT, payroll and tax specialists – all under one roof. No call centres, no junior handlers.
