Nixon Williams

What Nixon Williams does

Nixon Williams, founded in 1992 and rebranded to Caroola in 2024, is a UK-based accountancy practice that provides fixed-fee limited company accountancy services to freelance contractors, consultants, and interim managers. The firm is a subsidiary of Caroola Group Limited (registered in England and Wales, No. 06277058) and operates as the only national specialist firm of accountants with offices across the UK. Its customer base is concentrated in the contractor and freelancer segment, with additional positioning toward IT professionals, engineers, construction trades, landlords, content creators, legal and medical professionals, and small business owners.

The company's core offering is a three-tier fixed monthly subscription package: Accountancy Lite (£89+VAT/month), Accountancy (£135+VAT/month), and Accountancy+ (£179+VAT/month), supplemented by MTD for Income Tax (from £14+VAT/month) and Self-employed services (from £40+VAT/month). Service delivery relies on human accountants supported by FreeAgent cloud bookkeeping software (included in all packages), with no proprietary technology platform disclosed. Partnerships with FCSA (industry accreditation), Qdos (IR35 contract review), and Parasol (umbrella employment for inside-IR35 contractors) are bundled into the premium Accountancy+ tier. Certifications include FCSA Accredited Member status and Cyber Essentials PLUS.

The business operates a sales-led go-to-market model with direct website sign-up, dedicated phone sales lines, and a structured referral program offering £300 to referrers and 50% off fees for three months to referees. The company has accumulated over 5,000 five-star Trustpilot reviews and operates with 51-100 employees. Headquartered in Blackpool, the firm serves customers exclusively in the United Kingdom with no disclosed geographic expansion plans.

Name

Nixon Williams

Legal name

Caroola Group Limited

Website

https://nixonwilliams.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

51–100 employees

Short description

Nixon Williams (trading as Caroola) is a UK-based fixed-fee accountancy practice serving freelance contractors, consultants, and interim managers since 1992, operating under Caroola Group Limited with tiered subscription packages.

Ownership category

akta.pro rank

Product category

Accountancy Services

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121), Other Accounting Services (541219), Offices of Certified Public Accountants (541211)

akta.pro primary industry

Payroll Tax Filing, Compliance & Regulatory Reporting (BPAAAHAB)

akta.pro secondary industry

Contract Administration Support (PO/Contract Compliance) (BPAAAJAE)

Keywords

• Contractor accounting
• Limited company services
• Freelance tax compliance
• IR35 advisory
• VAT management

Headquarters

HQ city

Blackpool

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Accountancy Services Subscription: Fixed-fee monthly subscription model providing limited company accountancy services. Three tiered packages (Lite, Accountancy, Accountancy+) range from £89 to £179 per month, with additional services for MTD for Income Tax and self-employed accounting. Revenue is recurring and subscription-based, with annual billing options implied through package differentiation.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Nixon Williams (now trading as Caroola) provides fixed-fee limited company accountancy services to UK contractors, freelancers, consultants, and interim managers through tiered monthly subscription packages (Accountancy Lite £89, Accountancy £135, Accountancy+ £179 per month). Services span company formation, bookkeeping via FreeAgent software, year-end filing, VAT management, full HMRC submissions (Self-Assessment, P11D, Corporation Tax, Confirmation Statement), IR35 compliance support, and annual or quarterly tax reviews. Standalone offerings cover Making Tax Digital (MTD) for Income Tax compliance (from £14/month) and self-employed accountancy (from £40/month).

Product overview

Nixon Williams (now trading as Caroola) is a fixed-fee limited company accountancy services provider for contractors and freelancers in the UK. The company operates a tiered product architecture with three main service packages: Accountancy Lite (£89/month), Accountancy (£135/month), and Accountancy+ (£179/month), each building upon the previous tier with additional features. Additional standalone services include MTD for Income Tax (£14/month) and Self-employed Services (£40/month). All packages include access to FreeAgent bookkeeping software and UK-based accountant support. The company has been operating since 1992 and holds FCSA Accredited Member status and Cyber Essentials PLUS certification.

Differentiator

Problem solved

Functional benefit

Products and services

• Limited Company Accountancy Comprehensive limited company accountancy services for UK contractors and freelancers, offered through tiered monthly subscription packages (Accountancy Lite £89+VAT, Accountancy £135+VAT, Accountancy+ £179+VAT). Includes company formation, FreeAgent bookkeeping software, year-end filing, VAT management, full HMRC submissions (Self-Assessment, P11D, Corporation Tax, Confirmation Statement), IR35 contract review (Qdos), 2nd director services, Parasol umbrella for inside-IR35 roles, and annual or quarterly tax reviews.
• Self-employed Accountancy Services Accountancy service for self-employed individuals and sole traders, starting from £40+VAT per month. Provides tax advice, expense management, and HMRC compliance support including self-assessment tax returns.
• MTD for Income Tax Standalone Making Tax Digital (MTD) for Income Tax compliance service for contractors and freelancers, starting from £14+VAT per month. Enables clients to meet HMRC's Making Tax Digital requirements for Income Tax.

Quantifiable outcome

• Over £396/year savings on bookkeeping software (FreeAgent included)
• +5 more outcomes

Segments8 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Partnerships

Three partnerships are on record, tiered core.

• FCSA (Freelance and Contractor Services Association)coreOthersCaroola is a founding member and holder of Accredited Member status with the FCSA. The FCSA regularly and independently assesses Caroola to ensure compliance with high standards. This accreditation is a core part of their value proposition emphasizing compliance and trustworthiness to contractors.
• FreeAgentcoreTechnology or IntegrationFreeAgent bookkeeping software is included with all service packages. This partnership provides clients with professional-grade accounting software, saving over £396/year compared to standalone pricing. The integration enables streamlined bookkeeping and financial management for contractors.
• Cyber Essentials PLUScoreOthersCaroola is certified with Cyber Essentials PLUS, the highest level of certification under the UK government's Cyber Essentials scheme. This certification demonstrates commitment to data security for clients' financial information.

Scale indicators3 records

Recent moves1 record

Expansion highlights4 records

Direct peers

• SJD Accountancy: UK specialist accountancy practice serving limited company contractors and freelancers — directly competes in the same target segment with comparable fixed-fee subscription packages and IR35 services.
• Gorilla Accounting: UK contractor-focused online accountancy firm offering limited company accounting, tax returns, and IR35 support on a subscription basis to the same freelance/contractor audience as Caroola.
• Integro Accounting: Specialist UK accountancy practice for contractors, freelancers and consultants providing fixed-fee limited company accounting, IR35 reviews, and umbrella coordination.
• Brookson Group: Long-established UK accountancy and umbrella provider for contractors and freelancers, offering limited company accounting, IR35 solutions, and personal tax services to the same persona as Caroola.
• Crunch Accounting: Online accountancy service for freelancers, contractors and small businesses in the UK, providing bookkeeping, tax filing and limited company accounts on a subscription model.
• The Accountancy Partnership: UK accountancy firm offering fixed-fee contractor accounting, tax returns and IR35 services to limited company contractors and small business owners.
• 1st Choice Accountants: UK contractor-specialist accountancy firm providing limited company accounting, self-assessment and IR35 compliance services to UK freelancers and contractors.

Emerging players

• Coconut: Digital-first UK accounting software for self-employed individuals and limited company directors, providing bookkeeping, tax estimation and filing — an emerging technology-led threat to traditional contractor accountants.

Others

• FreeAgent: UK cloud accounting software provider whose platform is bundled into Caroola's packages. While not a direct competitor, FreeAgent's DIY focus and integrations compete for the same end-customer relationship.

Broad incumbents

• QuickBooks: Intuit's UK small-business accounting platform serving freelancers and SMBs broadly. Competes indirectly by enabling self-service accounting for the same small-business and sole-trader segments Caroola serves.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/201838883212514
• LinkedInlinkedin.com/company/nixon-williams-limited
• Xx.com/nixon_williams

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Nixon Williams