Sell-Side Tax Due Diligence & Advisory

Tax Factbook or Vendor Tax DD for a Successful Company Sale

  • A Tax Factbook presents the tax related facts of your company in a structured and efficient way and provides buyers with a reliable basis for their analysis

  • A Vendor Tax DD includes an additional review to assess and quantify material tax risks of the target

  • A clearly defined sell side tax advice process reduces buyer follow up questions, increasing transparency, and ensuring a well managed sale process

  • We deliver a report that serves as the key sell side document to make the buyer’s tax DD process more efficient

  • The result is greater process certainty, a stronger negotiating position, and fewer tax related surprises at the finish line

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Why Sell-Side Tax Due Diligence & Advisory Is Essential

An unprepared sale process leaves buyers room to make their own, often more conservative, assumptions about your tax position. A structured Tax Factbook or Vendor Tax DD puts you in control of the narrative and shortens the path to closing.

Buyer Ready Tax Story

A Tax Factbook or Vendor Tax DD that presents tax facts clearly and consistently, so buyer DD becomes faster and more predictable.

Less Follow Up, More Confidence

Proactive identification of likely buyer questions and evidence preparation to reduce iteration at the finish line.

Compliance and Documentation Quality

Assessment of tax filing quality, documentation completeness and responsiveness, strengthening the credibility of your sale process.

Risk Framing Where Needed

Where requested, assessment of material tax risks so you can adapt your sale narrative and strategy early.

Process Control

Structured workstreams and disciplined data room management to keep timelines and reduce disruption to day to day operations.

Negotiation Leverage

A stronger negotiating position through transparent, evidence backed deliverables and fewer last minute surprises.

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Structuring a Successful Sell-Side Due Diligence Process

The duration of each project depends on its individual scope and requirements and therefore cannot be generalized. The timeline below serves as an example to illustrate our approach and provide a better understanding of the typical phases. Your specific project schedule will be predefined together during the initial planning stage.

A well-executed sell-side tax due diligence & advisory follows a clear, disciplined process that surfaces risks early and supports sound decision-making. Each step ensures that assumptions are challenged, opportunities are assessed, and critical aspects of the target company are thoroughly analyzed. The exact timeline varies depending on the size, industry, and complexity of the transaction.

Week 0 to 1:

Kickoff and request list.

Week 1 to 2:

Data collection, interviews and initial analyses.

Week 2 to 3:

Deep-dive workstreams and drafting of key findings.

Week 3 to 4:

Finalization and management review.

Week 4 to 6:

Data room validation, buyer Q&A and contractual support

How We Bring Clarity to Your Deal

  • A buyer ready Tax Factbook or Vendor Tax DD that structures tax facts and, where applicable, tax risk views

  • Evidence backed compilation of key tax positions, including filings, audits, correspondence, rulings and positions

  • Identification of potential buyer questions and proactive alignment on fact patterns

  • Where requested, assessment of material tax risks with quantified or framed outcomes

  • A consistent narrative that supports a credible sale process and accelerates buyer DD

  • Inputs for SPA discussions from a sell side perspective where relevant

  • Management of the data room and controlled response process to buyer Q&A

Who Benefits Most from Our Sell-Side Tax Due Diligence & Advisory

  • Sellers who want a buyer ready tax narrative and fewer DD surprises

  • Management teams that need process control with limited disruption to day to day operations

  • Deal teams that want a stronger negotiating position through transparency and evidence

Tombstones

Here is a list of a few Buy-Side Financial Due Dilgience projects we successfully worked on over the past:

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Our Digital Tools

A reliable tax assessment is only possible when data, positions, and assumptions are evaluated through structured, technology-driven methods. We use modern tools, robust analytical frameworks, and secure data architectures to ensure every phase of the tax due diligence is precise, compliant, and corporate-ready.

  • Microsoft 365 environment with role-based access and full auditability

  • Data room preparation and document management to streamline the sales process

  • Dashboards designed for both management teams and M&A professionals

Key Areas of the sell-side Tax Due Diligence Review

  • Historical Tax Positions: We compile filing history, payment behavior and documentation across all relevant tax types into a clear, buyer-ready overview.

  • Transfer Pricing: We present intercompany arrangements and supporting documentation to pre-empt buyer questions on cross-border exposure.

  • Tax Audits and Rulings: We summarize open and historical audit positions, correspondence and rulings for a transparent risk picture.

  • Tax Attributes: We present loss carryforwards and other tax attributes and their usability for the buyer’s structuring.

  • Transfer Taxes: We flag transfer tax implications relevant to the transaction structure under discussion.

  • Risk Quantification (Ventor Tax DD): Where a Vendor Tax DD is chosen, we quantify material tax risks to strengthen your negotiating position.

Why Radial?

  • Big Four–level quality combined with the speed and flexibility of a boutique firm

  • Leadership by former Big Four professionals, a bilingual team, and a private-equity mindset

  • Data-driven delivery with dashboards, models, and governance structures that you fully control

  • Proactive communication and clearly defined responsibilities that ensure measurable progress every week, helping you avoid surprises

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Gain Full Transparency Into Tax Risks and Opportunities

You are preparing to sell and want to ensure every tax position, every assumption, and every risk is presented with clarity? Then now is the time to structure your sell-side tax advice professionally and thoroughly.

We support sellers with structured analysis, clear reporting, and real transaction expertise, enabling you to lead the narrative instead of reacting to buyer questions. Let’s talk and determine how we can best support you in the next step of your sale process.

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Frequently Asked Questions

We combine classic tax analysis with fast dashboards and modern data modeling. You immediately see the key facts, risk drivers, and patterns buyers will focus on. The results can be used directly for the data room and for buyer Q&A.

Ideally early, before you go to market, so we can define the data collection and analytical priorities correctly from the start and give you time to address any findings.

 

It depends on your objectives. A Tax Factbook is the market standard for a cost-efficient, transparent overview of tax facts. A Vendor Tax DD additionally assesses and quantifies material tax risks, giving management earlier visibility and a stronger negotiating position. We help you decide based on your transaction timeline and risk profile.

Machinery and equipment manufacturing, SaaS, project-based businesses, e-commerce, consumer and industrial goods, and more. We tailor the tax focus areas to your specific business model and jurisdiction footprint.

Typically four to six weeks from kickoff to data room readiness, including buyer Q&A support. Complex or multi-jurisdiction sale processes may require additional time.

Tax returns and assessments, correspondence with tax authorities, transfer pricing documentation, corporate structure charts, and historical reorganization documents. We prepare a detailed request list for you.

Yes. We coordinate closely with your legal, financial, and strategy advisors and provide tax definitions and inputs for SPA discussions.

We design scalable dashboards and offer support as your reporting requirements evolve throughout the sale process.

 

The goal is to deliver a complete, fact-based picture of your company’s tax position that buyers can rely on. This includes structured presentation of tax facts, proactive identification of buyer questions, and, where relevant, an assessment of material tax risks to strengthen your negotiating position and reduce follow-up questions.

Yes. We provide tax definitions, thresholds, and analyses that support SPA discussions from a sell-side perspective.

Yes. You receive a structured report for the data room along with support for managing buyer Q&A throughout the process.

What our customers say

Thorsten Preiss
Radial has helped us make great strides in our efforts to digitize financial reporting and increase transparency. I look forward to the next steps, in which we will once again be relying on Radial for support.
Thorsten Preiss, DETAX GmbH

Make the Right Acquisition Decision With Experience and Perspective

A thorough assessment of the financials determines whether a deal truly aligns with your goals, whether risks remain manageable, and whether you can move confidently as the buyer. If you need transparency, speed, and real financial certainty throughout the process, we support you with experience, technology, and deep expertise. Reach out to us and secure a buy-side due diligence that gives you as a buyer or investor genuine clarity.