Pure Tax Investigations vs ZenCall

Side-by-side comparison to help you choose the right product.

Pure Tax Investigations logo

Pure Tax Investigations

Pure Tax Investigations provides expert defense for businesses in serious HMRC tax disputes.

Last updated: March 1, 2026

Make crystal-clear international calls directly from your browser with ZenCall's affordable pay-as-you-go pricing.

Last updated: February 26, 2026

Visual Comparison

Pure Tax Investigations

Pure Tax Investigations screenshot

ZenCall

ZenCall screenshot

Feature Comparison

Pure Tax Investigations

Specialist Team with Ex-HMRC Insight

The firm's advisory team is comprised of experienced, qualified tax investigation specialists, including former senior HMRC inspectors. This provides clients with an unparalleled strategic advantage, as the team possesses insider knowledge of HMRC's operational approaches, tactics, and decision-making processes, enabling them to anticipate challenges and build the most effective defence and negotiation strategies.

End-to-End Investigation Management

Pure Tax Investigations provides comprehensive management of the entire HMRC engagement process. This includes initial analysis and case evaluation, handling all correspondence, preparing detailed disclosures and reports, negotiating with HMRC officers, and representing clients through to resolution, whether via settlement, Alternative Dispute Resolution (ADR), or tribunal.

Discreet & Bespoke Client Service

Understanding the sensitivity of tax investigations, the firm offers a highly discreet and tailored service. Each client's situation is evaluated individually, with advice and strategy crafted to meet specific commercial aspirations and personal circumstances, ensuring a confidential and personalised approach from start to finish.

Wide Spectrum of Tax Issue Expertise

The firm possesses deep expertise across a vast range of complex tax matters. This includes specialist knowledge in areas such as R&D tax enquiries, Inheritance Tax investigations, offshore disclosures (WDF), property tax (Let Property Campaign), crypto asset enquiries, and corporate criminal offence (CCO) advice, making them a one-stop resource for intricate tax problems.

ZenCall

Browser-Based Calling

ZenCall’s browser-based calling feature allows users to make international calls without downloading any applications. Simply open your browser, and you are ready to start your conversations instantly, removing the hassle of installations and updates.

Transparent Pricing

With ZenCall, users benefit from a transparent per-minute pricing model. This means there are no hidden fees or unexpected charges, allowing for budget-friendly international calling that is predictable and straightforward.

No Expiry on Credits

ZenCall's credits never expire, providing users with the flexibility to utilize their purchased minutes whenever they need them. This feature is especially beneficial for those who make infrequent international calls, as there is no pressure to use credits within a specific timeframe.

Unlimited Calling Plans

For users who frequently call within the US and Canada, ZenCall offers unlimited calling plans starting at $19 per month. This option is perfect for individuals or teams that rely heavily on consistent communication across North America.

Use Cases

Pure Tax Investigations

Facing a Serious HMRC Fraud Investigation (COP9)

When an individual or business receives a Code of Practice 9 (COP9) letter from HMRC's Fraud Investigation Service, it indicates a suspected serious tax fraud. Pure Tax Investigations provides critical expert guidance through this daunting process, managing the contractual disclosure facility (CDF) process, preparing a robust disclosure report, and negotiating to secure the best possible civil settlement and avoid criminal prosecution.

Managing a Complex HMRC Enquiry into a Large Business

Large corporates undergoing intensive, cross-tax enquiries benefit from the firm's structured approach. Pure Tax Investigations acts as a strategic buffer, analysing HMRC's information requests, coordinating with the client's accountants, and deploying technical expertise to challenge HMRC's positions and achieve a commercial resolution that minimises disruption and financial impact.

Making a Voluntary Tax Disclosure

For clients with undisclosed tax liabilities related to offshore assets, rental property income, or crypto gains, the firm facilitates voluntary disclosures through HMRC's campaigns like the Worldwide Disclosure Facility (WDF) or Let Property Campaign (LPC). They ensure the disclosure is complete, accurate, and presented optimally to mitigate penalties and interest.

Responding to an HMRC Compliance Check or Information Notice

Even routine HMRC compliance checks can be burdensome. Pure Tax Investigations steps in to handle all communications, ensuring client responses to information notices (Schedule 36) are legally compliant and strategically sound, preventing a simple check from escalating into a wider, more invasive investigation.

ZenCall

Remote Work Communication

ZenCall serves as an essential tool for remote workers who need to connect with clients or colleagues internationally. The platform's reliability and clarity ensure that important discussions happen without interruptions or connectivity issues.

Small Business Operations

Small businesses can leverage ZenCall for customer service or client interactions. The cost-effective calling rates, combined with the ability to record calls, make it easier to manage communications and maintain high engagement levels with customers.

Personal Connections Abroad

For individuals with family and friends living overseas, ZenCall provides a straightforward way to stay in touch. The simplicity of browser-based calling means that users can easily reach loved ones without the complications of traditional calling methods.

Education and Tutoring Services

ZenCall is ideal for educators and tutors conducting sessions with students in different countries. The platform’s high-quality voice calls facilitate effective learning experiences and ensure clear communication between teachers and learners.

Overview

About Pure Tax Investigations

Pure Tax Investigations is a premier, specialist advisory firm that acts as an independent and expert intermediary between clients and HM Revenue & Customs (HMRC). The firm is dedicated to providing a robust defence and strategic resolution for individuals and businesses facing the immense pressure of HMRC enquiries, investigations, and disclosures. It is specifically designed for entrepreneurs, business owners, private clients, and large corporates whose complex domestic and international tax affairs have come under HMRC scrutiny. The core value proposition lies in its deep, pragmatic expertise, which is led by former senior HMRC tax inspectors. This unique insight ensures clients receive a service characterised by certainty, absolute discretion, and fierce protection. Pure Tax Investigations manages the full spectrum of compliance issues, from routine checks and compliance reviews to the most serious civil fraud investigations under Code of Practice 9 (COP9) and complex enquiries under Code of Practice 8 (COP8). The firm's mission is to serve as a dedicated specialist fighting relentlessly on behalf of clients to achieve commercial, wealth-preserving resolutions, providing peace of mind during inherently stressful processes.

About ZenCall

ZenCall is a revolutionary browser-based international calling platform designed to make high-quality voice calls to any mobile phone or landline worldwide directly from your laptop or desktop. This innovative service eliminates the need for apps, SIM cards, or subscriptions, providing users with an effortless way to connect with others globally. ZenCall operates on a transparent pay-per-minute pricing model, ensuring that users only pay for what they use, making it an ideal choice for individuals, remote workers, and small teams seeking reliable global communication without the burden of long-term contracts. With calls that connect in seconds and are optimized for clarity and stability, ZenCall empowers users to easily reach clients, customers, and family abroad. Its focus on simplicity and control allows instant access, clear call rates, and usage-based billing, offering a cost-effective alternative to traditional international calling services.

Frequently Asked Questions

Pure Tax Investigations FAQ

What makes Pure Tax Investigations different from my accountant?

While accountants handle compliance and routine tax filings, Pure Tax Investigations specialises exclusively in contentious tax matters and HMRC investigations. Their team includes ex-HMRC inspectors with direct experience conducting enquiries, giving them unique tactical and procedural insight to defend clients aggressively, which most general practice firms cannot offer.

What should I do if I receive a Code of Practice 9 (COP9) letter from HMRC?

A COP9 letter is extremely serious and requires immediate, expert attention. You should contact a specialist firm like Pure Tax Investigations immediately and before responding to HMRC. They will advise you on your options, typically involving entering the Contractual Disclosure Facility (CDF) to make a full disclosure and seek a civil settlement, which they will manage on your behalf.

Can you help with disclosures for offshore income or gains?

Yes, Pure Tax Investigations has extensive experience managing disclosures through HMRC's Worldwide Disclosure Facility (WDF) and other offshore campaigns. They ensure all historical income, gains, and related tax liabilities are correctly calculated and disclosed in a manner designed to secure the lowest possible penalties under the relevant legislation.

How do you charge for your tax investigation services?

Given the unique nature of each investigation, Pure Tax Investigations typically operates on a fixed-fee or agreed project-fee basis, tailored to the specific scope and complexity of the case. This provides clients with cost certainty from the outset. An initial consultation is offered to discuss the case details and provide a clear fee proposal.

ZenCall FAQ

How do I get started with ZenCall?

To get started with ZenCall, simply visit the website, create an account, and you will receive free credits to test the service. No credit card is required for the initial sign-up.

Are there any hidden fees with ZenCall?

No, ZenCall operates on a transparent pricing model where users pay only for the minutes they use, with no hidden fees or additional charges, ensuring clarity in billing.

Can I use ZenCall on mobile devices?

Currently, ZenCall is designed as a browser-based platform, meaning you can access it from any laptop or desktop without the need for mobile applications. This makes it easy to use on various devices.

What happens to my credits if I do not use them?

ZenCall credits never expire, so users can keep their purchased minutes for as long as they wish without the concern of losing them. This gives users the flexibility to use their credits whenever needed.

Alternatives

Pure Tax Investigations Alternatives

Pure Tax Investigations is a specialist advisory firm in the business and finance category, providing expert defence for individuals and businesses facing serious HMRC tax disputes and investigations. Clients may seek alternatives for various reasons, such as differing budget requirements, the need for a specific geographic service area, or a preference for a different service model or firm size. When evaluating an alternative provider, key considerations should include the depth and relevance of the team's expertise, particularly any direct experience with HMRC procedures. It is also crucial to assess the firm's track record in handling cases similar to your own and the clarity of their service structure and fee arrangements.

ZenCall Alternatives

ZenCall is a browser-based international calling platform that allows users to make high-quality voice calls to mobile phones and landlines around the globe. It falls under the category of business and finance communication tools, focusing on providing affordable global calling solutions without the need for apps, subscriptions, or complex setups. Users often seek alternatives to ZenCall for various reasons, including pricing flexibility, a wider array of features, or specific platform compatibility. When choosing an alternative, it's essential to consider factors such as call quality, user experience, billing transparency, and overall reliability, ensuring the selected service meets your unique communication needs effectively.

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