Sell-Side M&A Advisory Services

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Our sell side M&A Advisory services that help you Exit with Value and Confidence
  • check Vendor Due Diligence
  • check Accounting Clean-Up & Normalisation
  • check Exit Readiness Review
  • check Tax Planning for Exit
  • check Forecast Review & Scenario Planning
  • check Data Room & Investor Pack Setup
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+44 20 3900 3500

sales@123financials.com
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Accountants for Sell-Side Transactions

Plan Smart, Exit Strong, and Maximise Value with 123Financials

123Financials’ sell-side advisory accountants help founders, investors, and management teams prepare their businesses for a clean, value-optimised exit.

We start by understanding your goals, valuation expectations, and buyer profile - then design a deal-readiness strategy that highlights strengths, fixes weaknesses, and boosts buyer confidence. Our team handles vendor due diligence, tax planning, and accounting clean-up, ensuring you present an investor-ready business that commands the right price - and closes without friction.

Founders partner with us.

15

YEARS OF EXPERIENCE

100+

FOUNDERS HELPED

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Our Sell-Side Services


  • Vendor Due Diligence (VDD)

  • Accounting Clean-Up & Normalisation

  • Exit Readiness Review

  • Tax Planning for Exit

  • Forecast Review & Scenario Planning

  • Data Room & Investor Pack Setup

Vendor Due Diligence (VDD)

Be ready before buyers arrive. Our vendor due-diligence accountants review your financials, tax, and compliance to reveal potential issues early and showcase your strengths.

  • task_alt Identify and resolve red flags pre-sale
  • task_alt Deliver investor-grade due-diligence packs
  • task_alt Build buyer trust and speed up negotiations

Accounting Clean-Up & Normalisation

We prepare your accounts to reflect real profitability. By removing non-recurring items and aligning ledgers, we ensure buyers see a transparent and reliable picture of your business.

Accurate, audit-ready numbers strengthen credibility and valuation confidence.

Exit Readiness Review

Our exit-readiness review assesses every financial, tax, and compliance angle before you enter the market.

We map improvement areas, provide a readiness score, and help you present your company’s story with clarity and confidence.

Tax Planning for Exit

Our tax experts design exit strategies that protect your proceeds and reduce tax liabilities.

From capital-gains optimisation and group restructuring to Entrepreneurs’ Relief or equivalent reliefs abroad, we ensure your sale is structured efficiently - wherever you operate.

Forecast Review & Scenario Planning

Strong forecasts make strong valuations. We test your revenue and margin assumptions under multiple scenarios, providing realistic, defensible projections that inspire investor confidence.

Data Room & Investor Pack Setup

First impressions matter. We create a secure, well-organised data room containing all key financial, tax, and legal records - making due diligence faster, smoother, and buyer-friendly.

How Our Sell-Side Advisory Services Help You Maximise Value

Working with experienced M&A accountants gives you a competitive edge in every negotiation.

At 123Financials, we transform complex financial data into a clear, investor-ready story - helping you secure higher valuations and shorter deal timelines.

We manage every stage from pre-sale preparation to completion accounting, so you can focus on the next chapter of growth.

  • task_alt Comprehensive vendor due diligence and accounting clean-up
  • task_alt Strategic exit readiness and valuation improvement plans
  • task_alt Buyer-friendly forecasts and financial models
  • task_alt Secure digital data room and investor reporting packs
  • task_alt Ongoing post-deal compliance and advisory support
  • task_alt Prepare thoroughly. Present confidently. Exit profitably with 123Financials.

Sell-Side Advisory Services

A fixed-fee, low cost Buy-Side Advisory Services for Startups or small-business.

0203 900 3500

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Frequently Asked Questions -Sell-Side Advisory Services

1. What does a sell-side accountant or advisor do?

A sell-side advisor helps business owners prepare for sale or investment by improving financial transparency, managing due diligence, and supporting negotiations.

At 123Financials, we handle vendor due diligence, tax planning, valuation support, and deal accounting to ensure your business is ready to sell for its full worth.

2. Why choose 123Financials for sell-side advisory?

We’re ICAEW-accredited accountants with deep M&A and tax experience. Our integrated team covers accounting, forecasting, and compliance under one roof.

Whether you’re selling in the UK, the US, or internationally, we help you achieve a smooth, well-structured exit.

  • task_altTailored sell-side readiness and due-diligence support
  • task_altCloud-based collaboration with real-time updates
  • task_altFixed-fee, deadline-driven delivery
  • task_altCross-border transaction expertise
  • task_altInvestor-focused presentation and strategy
3. What can accountants do for a business sale?

Sell-side accountants ensure your books are investor-ready, identify financial risks, and improve valuation credibility.

We handle accounting clean-up, forecast validation, tax planning, and post-deal compliance - guiding you from preparation to completion seamlessly.

4. What should I consider when hiring a sell-side advisor?

Look for proven transaction experience, recognised qualifications (ICAEW, CPA, etc.), transparent pricing, and integrated accounting and tax expertise.

A great sell-side advisor understands both compliance and commercial storytelling - helping you present your business in its best financial light.

5. What sell-side advisory services do I need?

Typical services include:

  • task_alt Vendor Due Diligence
  • task_alt Accounting Normalisation
  • task_alt Forecast Review
  • task_alt Data Room & Investor Pack Setup
  • task_alt Completion Accounts & Post-Sale Support
  • task_alt We tailor each engagement to your exit objectives and buyer type.
6. How much do sell-side advisory services cost?

Costs depend on the size and complexity of your business..

We provide fixed-fee proposals covering due diligence, tax structuring, and financial reporting - no hidden extras.

7. Will one person manage my sell-side project?

Yes - you’ll have a dedicated lead accountant supported by a small team of M&A and tax specialists.

They’ll coordinate your project from readiness assessment through completion, ensuring continuity and clear communication.

8. How do you work with international clients?

Our global clients connect via secure cloud tools, email, Zoom, and WhatsApp.

We comply with GDPR, US privacy laws, and OECD tax standards - keeping your data safe and your process transparent across time zones.

9. Do you handle cross-border exits or group sales?

Absolutely. We advise on multi-jurisdictional exits, including US, UK, and EMEA-based entities.

Our team collaborates with legal and tax advisors globally to ensure compliance and tax efficiency across all territories.

10. What makes 123Financials different from traditional sell-side advisors?

We go beyond preparation - we deliver strategy.

Unlike traditional advisors, we integrate deal readiness, tax planning, and compliance into one cohesive process.

Our approach is proactive, tech-driven, and focused on maximising your exit value, not just closing a transaction.

Ready to Plan Your Exit?

Book a free consultation with our sell-side advisory experts to explore your exit strategy, valuation options, and tax structure.

Wherever you’re based - London, New York, or Singapore - we’ll help you prepare, present, and profit confidently.

Accounting Partners

We Deliver

Best Price

Quality Service

Good Support

Satisfaction

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