Carbon Accountancy Ltd

Carbon Accountancy is a UK-based chartered accountancy firm established to provide comprehensive accounting, tax, audit, and advisory services to businesses and individuals. With offices in London (EC1), Reading, and Dublin, the firm serves a diverse client base ranging from fast-moving startups and growing SMEs to international corporations and listed companies.

Core Services

Carbon Accountancy offers a full suite of accountancy services including company accounts preparation, statutory audits, business tax services, bookkeeping, self-assessment tax returns, payroll services, and EMI share schemes. The firm also provides specialized services such as cryptocurrency tax advice, forensic accounting, corporate finance, R&D tax credits, business valuations, and due diligence support for venture capital-backed companies.

Cryptocurrency and Web3 Expertise

The firm has developed particular expertise in cryptocurrency and cryptoasset taxation, providing professional support to individuals and businesses involved in crypto trading, mining, staking, and DeFi activities. Carbon Accountancy helps clients navigate HMRC's complex cryptocurrency tax requirements, including capital gains tax on crypto disposals, income tax on mining and staking rewards, and proper disclosure on self-assessment tax returns. The firm stays current with evolving HMRC guidance on digital assets including Bitcoin, Ethereum, Solana, and other cryptocurrencies.

Key Strengths

Client-Focused Approach: Carbon Accountancy prides itself on building lasting, personal relationships with every client. Founder and CEO John Leyden personally speaks to every client, and many have remained with the firm for years. The firm emphasizes exceptional client service, straightforward language, and proactive advice without jargon.

Fixed Fee Structure: The firm offers genuine fixed fees, allowing clients to budget effectively without surprises. This transparent pricing model is a core differentiator in the accountancy market.

Deep Sector Experience: Carbon Accountancy works across multiple industries including technology and IT, listed companies and international groups, drinks brands and craft breweries, property, renewable energy, regulated clients, business services, charities, manufacturing, and startups and scale-ups.

Expert Team: Led by John Leyden FCA (qualified 1989, previously 7 years at KPMG), the firm maintains exceptional staff retention, ensuring consistent high-quality service. The team includes multiple FCCA and ACCA-qualified accountants with extensive experience in audit, tax, corporate finance, and business advisory.

Specialized Advisory Services

Beyond traditional accountancy, Carbon Accountancy provides value-added services including:

• Part-time Finance Director services for VC and angel-backed companies
• Corporate finance support (fundraisings, acquisitions, disposals)
• Share option schemes and EMI administration
• HMRC enquiry and tax investigation support
• Wills, probate, and estate administration
• Data room services and due diligence for M&A transactions
• Property service charges audits and reviews

Notable Capabilities

John Leyden has personally been involved in approximately 50 fundraisings, 35 acquisitions, and 20 business disposals throughout his career, bringing significant corporate finance expertise to the firm's clients. The firm has extensive experience with HMRC enquiries, including tax fraud investigations, and provides forensic accounting services.

Why Choose Carbon Accountancy

Carbon Accountancy combines technical accounting excellence with a human touch. The firm delivers straightforward, jargon-free advice with fixed fee pricing and a commitment to exceptional client service. With offices in London, Reading, and Dublin, Carbon Accountancy offers UK reach with a local feel, serving clients across the UK and internationally while maintaining the personal relationships and responsiveness of a boutique practice. The firm is carbon-friendly and ethical, committed to fair employment, and actively gives back to local communities.