Accountants for Start-Ups

Launching a start-up? Don’t let accounting headaches slow you down. Our expert business accountants specialise in start-ups—handling everything from company formation to VAT, payroll, and cloud accounting (Xero/QuickBooks/FreeAgent). Limited company, sole trader, or LLP? We’ve got you covered—so you can focus on what really matters: growing your business.

30-Day Company Formation
90% Tax Savings
1,000+ Startups Supported

Why Startups Struggle with Finances

(How We Fix It)

Most startups launch with big ideas but zero financial infrastructure. Founders juggle cash flow nightmares, HMRC deadlines, and investor demands—all while trying to grow. The result? Costly mistakes: overpaid taxes, payroll errors, missed R&D claims, or worse—compliance penalties that drain precious runway. Many DIY at first (or hire the wrong accountant), only to realise too late that poor financial hygiene slows funding, scaling, and even survival.

This is where Sigma steps in. We don’t just file your taxes—we build financial systems tailored to startups. From day one, we automate payroll/VAT, optimise tax structures (so you keep more revenue), and ensure investor-ready reporting. Our fixed-fee plans scale with you so you avoid surprise fees. Think of us as your on-demand finance team: proactive, tech-savvy, and obsessed with saving you time and money.

Why Startups Struggle with Finances

Startup Accounting Services

Built for Growth

Your finances need to be as agile as your business. From tax compliance to investor readiness, our tailored accounting services handle the numbers—so you can focus on scaling.

Self Assessment Tax Returns

Meet HMRC deadlines and claim all allowable expenses. Avoid penalties and keep more revenue.

Auto-enrolment & Workplace Pensions

Even with one employee, stay compliant with pension regulations. We handle setup, filings and management.

Business Tax Advice

Proactive strategies to minimise liabilities and maximise reliefs—so you reinvest more into growth.

Bookkeeping Services

Accurate, real-time financial tracking via Xero, QuickBooks, or FreeAgent. No more spreadsheet chaos.

Corporation Tax Return

Precise filings to avoid HMRC scrutiny—and optimise deductions to reduce your tax bill.

Set Up a Limited Company

Fast, hassle-free incorporation with expert guidance on share structures and director responsibilities.

VAT Returns

Register, file, and reclaim VAT efficiently—whether you’re on Flat Rate, Cash, or Standard schemes.

Statutory Accounts

Audit-ready financial statements that impress investors and satisfy Companies House.

Company Secretarial Services

Keep your legal filings, director updates, and annual returns error-free—without the admin headache.

SEIS & EIS Compliance

Maximise tax incentives for investors—so securing funding becomes easier and more attractive.

Smart Accounting that Fuel Your Growth Without the Financial Headaches

As startup specialists, we know your biggest advantage is time – and your biggest risk is financial blind spots. That’s why our startup accounting services act as your 24/7 finance department: eliminating compliance risks, uncovering tax savings, and giving you the financial intelligence to make bold moves. Whether you’re pre-revenue or scaling fast, we help you spend less time worrying about money and more time making it.

Strategic Business Planning

Transform rough ideas into investor-ready growth forecasts

Cash Flow
Optimisation

Proactive management to extend the runway and prevent crises

Full HMRC
Compliance

Bulletproof filings for taxes, payroll, and company secretarial

Precision Bookkeeping

Real-time financial visibility across all your accounts and platforms

Fundraising Readiness

Financial packaging that attracts investors and accelerates deals

Who we Serve

Who We Serve

Power Your Startup's Growth with Strategic Financial Leadership

Raising funding isn’t just about great ideas—it’s about proving your startup’s financial credibility. Investors need to see bulletproof forecasts, airtight compliance, and scalable systems before writing checks. Yet most founders struggle with patchy financial controls, unclear runway projections, and last-minute scrambles to meet due diligence demands. One missed compliance requirement or unrealistic cash flow model can derail your entire funding round.

We transform your financial operations into investor magnets.
Our team

Think of us as your co-pilots for fundraising—we don’t just prepare your numbers, we strengthen your entire financial position to secure capital on better terms.

Why Startup Founders Choose Sigma as Their Financial Partner?

We’re not just accountants—we’re startup specialists who speak your language. From day one, we combine deep financial expertise with real-world startup experience to give you a competitive edge.

Founders First Approach

We’ve walked in your shoes. Our advice isn’t just technically sound—it’s practical, actionable, and tailored to your startup’s unique stage and challenges.

Growth-Obsessed Mindset

Beyond compliance, we identify opportunities—whether it’s tax savings, funding readiness, or financial process optimisation—to fuel your scaling journey.

Seamless Tech Integration

Your time is precious. We automate the tedious (bookkeeping, payroll, reporting) with smart tools like Xero and FreeAgent, so you can focus on building.
Why Startup Founders Choose Sigma as Their Financial Partner