OPTAX LIMITED

Name

OPTAX LIMITED

Legal name

Optax Limited

Website

https://optax.co.uk

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1–10 employees

Ownership category

akta.pro rank

Product category

Tax Compliance Services

NAICS

Portfolio Management and Investment Advice (523940), Custom Computer Programming Services (541511), Other Scientific and Technical Consulting Services (54169)

SIC

Investment Advice (6282), Services-Management Consulting Services (8742), Services-Prepackaged Software (7372)

akta.pro primary industry

Tax Services (Withholding, Reclaims, FATCA/CRS) (FSAAAOAM)

Keywords

• FATCA CRS compliance
• US withholding tax advisory
• Tax form validation
• Entity classification services
• Operational tax management

Headquarters

HQ city

Amersham

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. FATCA & CRS Advisory Services: Specialist advisory services for entity classification, GIIN registration, FATCA and CRS compliance implementation, and ongoing regulatory guidance. Delivered by expert advisors with deep technical experience.
2. FATCA & CRS Reporting Services: Market-leading FATCA and CRS reporting services. Preparation, validation, and filing of reports across multiple jurisdictions using proprietary technology platform. Ensures compliance with technical specifications and deadline requirements.
3. Tax Form Review and Validation: Validation of US W-8/W-9, FATCA, and CRS forms to ensure completeness, validity, and compliance. Includes tracking of form invalidity and expiration through Emprise software.
4. Emprise Software Platform Subscription: SaaS platform subscription for operational tax management including document management, entity structure visualization, compliance tracking, and reporting tools. Includes free trial and paid plans for private market funds.
5. US Inbound Advisory: Advisory services on US withholding and reporting implications for non-US entities investing into US assets, including treaty claims, ECI considerations, and withholding agent obligations.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

OPTAX provides specialist FATCA, CRS and US withholding tax advisory and compliance services aimed primarily at private market funds and other financial institutions. Its service portfolio spans technical advisory, reporting, tax form validation, entity classification, GIIN registration, tax authority query support, reporting registration, and US inbound advisory, which are operationalized through its proprietary Emprise software platform that delivers AI-driven document reading, structure chart generation, validation, and compliance workflows.

Product overview

OPTAX LIMITED operates as a unified advisory and software company offering specialist FATCA, CRS, and US withholding tax services through a combination of expert advisory services and its proprietary Emprise technology platform. The core product is the Emprise modular platform, which includes EmpriseSC for structure chart visualisation, AI document reading, document management, compliance modules, collaboration tools, and tax filing tracking. The advisory services complement the software by offering entity classification, GIIN registration, tax form validation, reporting, and support for tax authority queries across multiple jurisdictions including Cayman, UK, Luxembourg, Jersey, and Guernsey. The company was founded in 2019 and serves private market fund clients ranging from £2 billion to £500 billion AUM.

Differentiator

Problem solved

Functional benefit

Brands

• Emprise: A modular operational tax platform that uses automation to manage investor data, documents, and reporting obligations, and visualise entity relationships with strong controls and auditability. Includes AI document reader, data extraction, document storage, group entity and investor data storage, automated structure charts, compliance modules, collaboration tools, tax filing tracker, and detailed audit logs.
• EmpriseSC

Products and services

• Emprise Platform Proprietary SaaS platform for operational tax management, providing AI Document Reader, AI Structure Chart generation, tax form validation, entity classification, and FATCA/CRS and US withholding tax compliance workflows for private market funds and other financial institutions.
• FATCA & CRS Advisory Specialist technical advisory on FATCA and CRS obligations for private market funds and other financial institutions, delivered by qualified US legal and accounting professionals.
• FATCA & CRS Reporting Operational reporting service covering FATCA and CRS filings and disclosures, delivered for private market funds and other financial institutions.
• Tax Form Validation / Review Service reviewing and validating tax forms (e.g., W-8 and W-9 series) on behalf of fund managers and other financial institutions to support correct withholding and reporting.
• Entity Classification Analysis and classification of entities within fund structures to determine their FATCA, CRS and US withholding tax status.
• GIIN Registration Service to register entities for Global Intermediary Identification Numbers with the IRS for FATCA purposes on behalf of fund managers.
• Tax Authority Query Support Support responding to queries from tax authorities (including the IRS) on FATCA, CRS and US withholding tax matters affecting clients.
• Reporting Registration Service to register clients for FATCA and CRS reporting obligations with relevant tax authorities.
• U.S. Inbound Advisory Specialist US tax advisory for non-US corporates and financial institutions facing US withholding and reporting exposure on inbound transactions and structures.

Quantifiable outcome

• Reduced administrative burden through automated structure charts and document management
• +3 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability6 records

Feature8 records

Partnerships

One partnership is on record.

• Microsoft AzurecoreTechnology or IntegrationOptax uses Microsoft Azure for hosting their websites, software platforms (Emprise, Emprise SC), and data storage. Azure provides the cloud infrastructure for security, data protection, and operational technology services.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Avalara: Cloud-based tax compliance automation platform covering sales tax, VAT, and related reporting. Compares to Optax as a tax-technology incumbent, though Avalara's focus is transactional tax rather than cross-border investor/fund reporting.
• Sovos: Global tax compliance software company offering solutions for VAT, withholding tax, and reporting automation including FATCA-related workflows. Comparable as a broader tax-technology incumbent, though Sovos operates at much larger scale and across many tax verticals beyond private funds.
• Wolters Kluwer Tax & Accounting: Provider of professional tax compliance and reporting software (e.g., Tfx, OneSource) used by corporations and tax advisors globally. Overlaps with Optax on tax form validation, withholding workflows, and reporting compliance — but at much greater scale and across broader audiences.
• Deloitte (FATCA/CRS practice): Big 4 firm with a global FATCA, CRS, and US withholding tax advisory practice serving funds and financial institutions — the same firm where Optax's founder previously led these services. Represents the larger, broader advisory incumbent Optax competes against for enterprise mandates.

Direct peers

• TMF Group: Global fund administration and corporate services firm offering FATCA, CRS, and tax compliance services to private equity and real estate funds across 80+ jurisdictions. Directly comparable to Optax as a competing provider of operational tax and regulatory compliance for private market fund managers.
• Waystone: Fund governance and compliance services provider to asset managers, including regulatory reporting, AIFM support, and risk services. Comparable to Optax as a specialist compliance firm serving private fund managers across multiple jurisdictions.
• IQ-EQ: Fund administration and investor services group providing tax reporting (including FATCA/CRS) and entity data management to private equity, real estate, and infrastructure funds. Overlaps Optax on multi-jurisdictional tax compliance and entity/investor data workflows for institutional fund managers.
• Maples Group: Offshore legal, fiduciary, and fund services firm with a dedicated tax and regulatory reporting practice serving Cayman, BVI, and Luxembourg fund structures. Comparable to Optax in serving Cayman, Luxembourg, Jersey, and Guernsey fund vehicles requiring FATCA/CRS reporting.
• Harneys (Harvey Norman Fostering LLP): Offshore law and fiduciary firm with a strong tax and regulatory practice advising investment funds on FATCA, CRS, and US withholding tax compliance. Comparable to Optax on advisory, entity classification, and reporting for offshore fund structures.

Emerging players

• Vertex Inc. Tax technology provider offering indirect tax determination and compliance automation, increasingly extending into broader tax reporting workflows. Comparable to Optax as a software-driven tax compliance specialist, though with a different primary focus on transactional/indirect tax.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/optax

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 OPTAX LIMITED