Accounting and financial support for early-stage, purpose-driven founders

From incorporation to Series A — the finance function that grows with your business.

Thrive Accountants is a B Corp-certified UK accountancy firm specialising in early-stage founders who are building something that genuinely matters. We specialise in expert-led, knowledge-intensive businesses — founders whose competitive edge is expertise, relationships, or a genuinely novel approach to a hard problem. Climate tech is where we have the deepest roots, but it is not the only qualification.

We are led by James Lizars, a former Finance Director, ACCA Council member, and author of Catalyst: How Accountants Can Be the Agents of Change in the Net Zero Transition. Thrive is a certified B Corporation and a net zero-aligned firm. We direct 20% of profits to reforestation through our designed-to-give model.

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Your numbers should fuel growth, not slow you down.

Thrive brings together accounting, tax, bookkeeping, payroll and financial operations under one roof — backed by deep sector experience and a genuine commitment to the founders we work with. We make sure your finance function works today and is ready for what comes next.

Services We Offer

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ACCOUNTING

A clear, accurate financial picture every month, not just at year-end. Our accounting service keeps your numbers up-to-date, compliant and meaningful, so you can make confident decisions and satisfy investors.
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BOOKKEEPING

We use the latest cloud-based tools — primarily Xero and Dext — to manage your day-to-day transactions with minimal disruption to your workflow. Transparent, efficient and fully integrated with your reporting.
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TAX (including R&D and VAT)

From corporation tax compliance to maximising R&D tax relief, we make sure you are not paying more than you need to and are claiming every incentive you are entitled to. We manage VAT registration, returns and ongoing compliance.
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PAYROLL (Director and Employee)

We handle payslips, payments, HMRC submissions, pension auto-enrolment and benefits reporting, so your people are paid accurately and on time.
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FINANCIAL OPERATIONS

Payments, invoicing and expense management — streamlined so your team spends less time on admin and more time on the work that matters.
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FRACTIONAL CFO SERVICE - ThriveCFO

For founders who need board-level financial leadership without the full-time cost. ThriveCFO delivers integrated finance leadership through an experienced associate model — a qualified CFO or FD working within a governed delivery framework, supported by an FP&A layer and anchored by Thrive’s institutional oversight. Designed for founders navigating fundraising, rapid growth, board reporting, or a significant financial decision. Available to founders who are not existing Thrive Accountants clients.

The Founders Launchpad

For founders in their first 18 months post-incorporation, Thrive offers the Founders Launchpad — a full accounting service at £95 per month, designed to make proper financial support accessible before a founder can justify the cost of a full-service firm. Limited intake each quarter. No long-term contracts. No catch-up fees.

Find out more about the Founders Launchpad

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Why Thrive?

  • B Corp certified — Thrive is a certified B Corporation, assessed across workers, community, environment, and governance. We direct 20% of profits to reforestation.
  • Sector depth — deep experience with innovative tech, impact-driven startups, and knowledge-intensive founder-led businesses.
  • Strategic and operational — the thinking and the doing, in one team. We do not separate advisory from delivery.
  • Scalable — services that grow as you do, from director-only payroll to a full finance function with fractional CFO support.
  • Led by James Lizars — founder, ACCA Council member, and author of Catalyst. His expertise shapes how Thrive works and who it works with.
  • Xero and Dext specialists — cloud-first finance infrastructure from day one.
SEE HOW WE WORK
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We’re building their finance function for when they scale. We’re always looking ahead to align with what they’re trying to achieve.

James Lizars FCCA

How we work and how we price

Thrive does not offer fixed packages. After an initial conversation, we send a tailored recommendation covering exactly what you need and what it will cost — a modular monthly service matched to your current stage. As your business grows, we add capability without requiring you to change provider.

Our goal is the same regardless of scope: to make finance a source of control and clarity, not stress.

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We’ll listen:

Understanding your business model, funding position, and growth plans. Following our first chat, we’ll send you a recommendation of everything you need and a breakdown of what it will cost.
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We’ll tailor:

The “everything you need” will be a modular monthly service that fits your current stage.
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We’ll scale:

We’ll add capability as your needs evolve, shaking things up or scaling operations.

Whether you need the full finance function or just one or two services, our goal is the same:to make finance a source of control and clarity, never stress.

SEE HOW WE WORK

Next Steps

The best way to find out if Thrive is the right fit for you is to start the conversation.

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