Pure Tax Investigations vs ZenCall
Side-by-side comparison to help you choose the right product.

Pure Tax Investigations
Pure Tax Investigations expertly resolves complex HMRC disputes, providing continuous support and peace of mind.
Last updated: March 1, 2026
ZenCall
Experience hassle-free international calling from your browser with ZenCall's clear audio and transparent pricing.
Last updated: February 27, 2026
Visual Comparison
Pure Tax Investigations

ZenCall

Feature Comparison
Pure Tax Investigations
Specialist COP9 & COP8 Defence
Our team provides expert, robust defence for clients facing serious HMRC investigations under Code of Practice 9 (for suspected tax fraud) and Code of Practice 8 (for complex tax avoidance). We apply a deep, iterative understanding of HMRC's civil investigation of fraud procedures to negotiate the best possible outcome, often securing contractual disclosure facilities that protect clients from criminal prosecution.
Proactive Tax Disclosure Management
We specialize in managing and facilitating voluntary tax disclosures through HMRC's various campaigns and facilities, such as the Worldwide Disclosure Facility (WDF) and Let Property Campaign (LPC). Our process involves a continuous review of a client's position to ensure disclosures are complete, accurate, and presented in the most favourable light to minimise penalties and interest.
End-to-End Compliance Check Handling
From the initial information notice to the final settlement, we manage the entire lifecycle of an HMRC compliance check or enquiry. Our approach is methodical and adaptive, ensuring all communications and document submissions are strategically handled to reduce client stress and limit the scope of HMRC's enquiries effectively.
Expert-Led Strategic Advisory
Clients benefit directly from the unparalleled insight of Amit Puri, our director and ex-HMRC senior Tax Inspector. This frontline experience informs every aspect of our service, from anticipating HMRC's next move to crafting persuasive negotiation strategies. We continuously integrate this insider knowledge into our defence frameworks for superior, results-driven advice.
ZenCall
No Downloads Required
ZenCall operates entirely from your browser, which means there is no need to download any apps or software. Just open your browser, log in, and start making calls without any hassles.
Transparent Pricing Structure
With ZenCall, you only pay for what you use through clear and transparent per-minute pricing. This means no hidden fees or surprise charges, allowing users to budget their calling expenses effectively.
Unlimited US & Canada Calling
For those who frequently call within the US and Canada, ZenCall offers unlimited calling plans starting from just $19 per month. This feature is perfect for individuals and small teams looking to maximize their communication efforts without breaking the bank.
Free Credits and Easy Cancellation
New users can enjoy free credits upon signing up, allowing them to test the service without any financial commitment. Additionally, ZenCall offers the flexibility to cancel at any time, making it a risk-free option for users.
Use Cases
Pure Tax Investigations
Responding to an HMRC Code of Practice 9 Letter
When a business owner receives a daunting COP9 letter alleging suspected tax fraud, our specialists immediately intervene. We guide the client through the critical decision-making process, manage all communication with HMRC's Fraud Investigation Service, and work iteratively to prepare a meticulous disclosure report under the Contractual Disclosure Facility, aiming to settle the matter civilly.
Navigating a Large Business Tax Enquiry
For large corporates facing complex, cross-tax enquiries from HMRC's Customer Compliance Group, we provide a seasoned defence team. We analyse the enquiry lines, coordinate with the client's accountants, and develop a continuous strategy to challenge HMRC's assumptions and information requests, protecting the business from undue reputational and financial damage.
Making a Voluntary Disclosure for Offshore Assets
An individual with previously undisclosed offshore income or gains can use our services to make a voluntary disclosure via the Worldwide Disclosure Facility (WDF). We conduct a thorough review of historical data, calculate the tax liability, and prepare the disclosure package, applying our evolving knowledge of the process to ensure compliance and mitigate penalties.
Defending Against an R&D Tax Credit Enquiry
A company claiming Research & Development tax relief faces a rigorous HMRC compliance check into their claim. Our specialists dissect the technical and financial aspects of the claim, prepare robust supporting documentation, and engage in detailed correspondence with HMRC to defend the validity of the claim and secure the owed tax credits.
ZenCall
International Business Calls
ZenCall is ideal for businesses that need to connect with clients and partners globally. Its high-quality voice calls ensure that important discussions are clear and professional, which is crucial for maintaining strong business relationships.
Remote Work Communication
As remote work becomes more common, ZenCall provides an efficient way for remote teams to communicate effectively. With its browser-based calling, team members can stay connected no matter where they are located.
Family and Friends Abroad
ZenCall is perfect for individuals wanting to keep in touch with family and friends living in different countries. The affordable rates and reliable service make it easier to maintain personal connections across distances.
Customer Support Services
Customer support teams can utilize ZenCall to provide assistance to their clients without the need for extensive infrastructure. The platform’s simplicity allows for quick setup and easy access to calling features, streamlining the support process.
Overview
About Pure Tax Investigations
Pure Tax Investigations is a premier specialist firm dedicated to resolving complex tax disputes and conducting rigorous tax investigations for business owners and entrepreneurs. We serve as an independent, expert buffer between our clients and HM Revenue & Customs (HMRC), providing robust defence during what can be an overwhelming and intrusive process. Our core mission is to deliver peace of mind, clarity, and certainty by navigating the intricate landscape of tax regulations with a tailored, discreet approach. We continuously refine our strategies based on the latest HMRC operational tactics, ensuring our defence methods are always evolving and improving for maximum client benefit. Led by Amit Puri, a former senior HMRC Tax Inspector with over two decades of experience, our team combines deep local knowledge with international tax expertise. We specialize in the most serious civil investigations, including Code of Practice 9 (COP9) and Code of Practice 8 (COP8), alongside managing compliance checks and facilitating voluntary disclosures through mechanisms like the Worldwide Disclosure Facility (WDF) and Let Property Campaign (LPC). Our iterative, client-focused process is designed to protect our clients' interests, preserve their wealth, and achieve the most favourable commercial outcomes possible.
About ZenCall
ZenCall is an innovative browser-based international calling platform that revolutionizes the way people communicate across borders. It allows users to make high-quality voice calls to mobile phones and landlines around the world directly from their laptop or desktop, eliminating the need for cumbersome apps, SIM cards, or subscriptions. Designed with simplicity and reliability at its core, ZenCall features transparent, per-minute pricing, making it exceptionally appealing for individuals, remote workers, and small teams who require dependable global communication without the burden of long-term commitments. With calls that connect in seconds and a focus on optimal clarity and stability, ZenCall serves as a cost-effective and user-friendly alternative to traditional international calling services. Its commitment to instant access, clear call rates, and usage-based billing underscores its dedication to providing seamless communication experiences for anyone looking to connect with clients, customers, or loved ones abroad.
Frequently Asked Questions
Pure Tax Investigations FAQ
What should I do if I receive a Code of Practice 9 (COP9) letter from HMRC?
Do not ignore it or respond directly without specialist advice. A COP9 letter indicates HMRC suspects you of tax fraud. Contact us immediately. We will help you understand your options, typically advising to enter the Contractual Disclosure Facility (CDF) to make a full disclosure and gain protection from criminal prosecution, guiding you through every iterative step of this critical process.
How long does a typical tax investigation take?
The duration varies significantly based on complexity, ranging from several months for a straightforward compliance check to multiple years for a serious COP9 investigation or large corporate enquiry. Our role is to manage the process efficiently, responding promptly to HMRC to prevent unnecessary delays, while continuously refining our strategy to work towards a timely resolution.
What is the difference between a compliance check and a tax investigation?
A compliance check is a routine review by HMRC to check the accuracy of a tax return or claim. A tax investigation is more serious and invasive, often triggered by suspicion of significant error, avoidance, or fraud (like COP8 or COP9). We handle both, applying a scalable and adaptive approach, with investigations requiring a more robust, defensive strategy.
Can you help if I have already started dealing with HMRC myself?
Yes, we can step in at any stage. Engaging us early is always preferable, but we can often rectify situations where dialogue has become problematic. We will review all previous correspondence, take over communication with HMRC, and implement a fresh, strategic approach to steer the case towards a better outcome, learning and adapting from the initial interactions.
ZenCall FAQ
How do I sign up for ZenCall?
Signing up for ZenCall is simple. Just visit the website, create an account by providing your email address, and you will gain instant access to calling features without needing a credit card for the initial free credits.
Are there any hidden fees with ZenCall?
No, ZenCall prides itself on transparent pricing. You pay only for the minutes you use without any hidden fees or unexpected charges, making budgeting for calls straightforward.
Can I use ZenCall on my mobile device?
ZenCall is designed to work seamlessly in a web browser, so you can access it from any device that supports a browser, including mobile devices. However, it does not require an app for mobile use.
What happens to my credits if I don’t use them?
Credits purchased through ZenCall never expire. This means you can take your time using them without the pressure of losing your balance, allowing for flexible communication as needed.
Alternatives
Pure Tax Investigations Alternatives
Pure Tax Investigations is a specialist firm in the business and finance sector, focusing on resolving complex tax disputes and investigations for businesses and entrepreneurs. Clients may seek alternatives for various reasons, such as differing budget requirements, a need for more generalist accounting services, or a preference for a firm with a different geographical focus or service structure. When evaluating other providers, it's crucial to assess their specific expertise in serious tax investigations like COP8 and COP9, the direct experience of their lead consultants with HMRC procedures, and their proven methodology for managing disclosures and compliance checks. The right fit should offer a clear, iterative support process that adapts to your case's evolving demands. A continuous cycle of review and tailored strategy is essential in tax defense. Look for a partner that demonstrates a commitment to this approach, ensuring your representation is consistently refined to protect your interests and achieve the optimal resolution through every phase of engagement.
ZenCall Alternatives
ZenCall is a browser-based international calling platform that enables users to make high-quality voice calls to mobile phones and landlines around the globe, all without the need for apps or subscriptions. This service appeals particularly to individuals, remote workers, and small teams seeking a straightforward, cost-effective solution for global communication. Users often look for alternatives to ZenCall for various reasons, including pricing structures, specific features, or the need for different platform compatibility. When searching for an alternative, it’s essential to consider factors such as ease of use, clarity of call quality, transparent pricing, and whether the service aligns with your calling habits and requirements.