Buy-Side M&A Advisory Services

head-shape
Buy-Side M&A Advisory Services That Help You Acquire with Confidence and Clarity
  • check Financial & Tax Due Diligence
  • check Quality of Earnings Review
  • check Valuation & Deal Modelling
  • check Tax Structuring & Clearance
  • check Completion Accounts Support
  • check Post-Acquisition Integration
Schedule a Meeting

Get in touch!

Chat with Us

+44 20 3900 3500

sales@123financials.com
2260

Tax filings

1042

Accounts filings

102

Reviews

Trustpilot

Accountants for Buy-Side Transactions

Buy Smart, Structure Right, and Scale Confidently with 123Financials

123Financials’ buy-side advisory accountants help investors and founders make informed, profitable acquisition decisions. We begin by understanding your investment strategy, target criteria, funding plans, and risk appetite -then design a clear roadmap for your transaction.

Our team supports you through financial due diligence, quality of earnings reviews, and tax-efficient deal structuring, ensuring you acquire businesses with confidence, compliance, and clarity.

Founders partner with us.

15

YEARS OF EXPERIENCE

100+

FOUNDERS HELPED

GET STARTED

Our Buy-Side Services


  • Financial Due Diligence (FDD)

  • Quality of Earnings (QoE) Review

  • Valuation & Deal Modelling

  • Tax Structuring & HMRC Clearance

  • Completion Accounts & True-Up Support

  • Post-Acquisition Integration

Financial Due Diligence (FDD)

A deep-dive review of the target’s financial health, performance, and working capital. We identify hidden risks, validate assumptions, and ensure you understand what you’re buying - not just what’s presented.

  • task_alt Comprehensive review of financial statements, cash flow, and forecasts
  • task_alt Working capital and debt analysis
  • task_alt Insightful findings that strengthen negotiation and valuation confidence

Quality of Earnings (QoE) Review

Go beyond headline profits. Our buy-side QoE reviews uncover sustainable earnings by stripping out one-off items, owner adjustments, and accounting anomalies.

We normalise EBITDA, validate recurring revenue streams, and assess the business’s core profitability - giving you a clear picture of maintainable performance before you invest.

Valuation & Deal Modelling

Every acquisition decision starts with value. We build bespoke financial models that simulate funding structures, ROI scenarios, and deal sensitivities - ensuring your offer reflects true economics.

Our models go beyond static valuations; they help you test multiple outcomes and make data-led decisions on pricing and financing.

Tax Structuring & HMRC Clearance

We design tax-efficient acquisition structures that protect your return and prevent post-deal surprises. From share vs. asset purchase decisions to cross-border setups, we align structure with your growth goals.

Our team also prepares HMRC clearance applications, ensuring full compliance and peace of mind before you sign.

Completion Accounts & True-Up Support

Final adjustments can make or break your deal. We manage completion accounts, verifying post-closing balances for cash, debt, and working capital accuracy.

Our accountants ensure fair “true-up” mechanisms, reducing disputes and delivering financial transparency between buyer and seller.

Post-Acquisition Integration

After completion, smooth integration is vital. We align your new acquisition’s accounting systems, reporting framework, and controls with your existing setup.

Our team manages consolidation, intercompany accounting, and opening balance sheet reviews - helping you unlock synergies and maintain financial consistency across the group.

How Our Buy-Side Advisory Services in the UK Help You Make Smarter Acquisitions

Working with experienced M&A accountants can make all the difference when buying a business. At 123Financials, our buy-side advisory services give investors and founders the confidence to make data-driven, tax-efficient, and strategically sound acquisition decisions.

We combine deep due diligence expertise with practical deal execution support -freeing you to focus on growth, not guesswork.

  • task_alt Detailed financial due diligence and working-capital analysis
  • task_alt Quality of earnings reviews to validate sustainable profits
  • task_alt Valuation and deal modelling for accurate pricing decisions
  • task_alt Tax structuring and HMRC clearance to minimise future exposure
  • task_alt Seamless post-acquisition integration and reporting setup
  • task_alt Cloud-based financial systems giving 24/7 visibility
  • task_alt Full compliance and accounting infrastructure for new group entities
  • task_alt Guidance on funding, investor reporting, and long-term ROI tracking
  • task_alt Bespoke buy-side accounting packages tailored to your investment strategy

Buy-Side Advisory Services

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

0203 900 3500

Schedule a Meeting

Frequently Asked Questions -Buy-Side Advisory Services

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

A buy-side advisor helps investors and companies assess the true value and risks of a target business before acquisition.

At 123Financials, our team provides financial due diligence, quality of earnings reviews, valuation modelling, and tax structuring -giving you complete clarity before you commit to any deal.

2. Why choose 123Financials for M&A and buy-side advisory?

We combine accounting precision with strategic insight. As ICAEW-qualified M&A accountants, we deliver investor-grade due diligence, tax-efficient structuring, and post-acquisition support

Whether you’re in the UK, the US, or expanding internationally, we help you buy confidently, reduce deal friction, and secure long-term value.

  • task_altTailored buy-side accounting and tax services
  • task_altReal-time collaboration via cloud platforms
  • task_altCross-border M&A and compliance expertise
  • task_altFast, fixed-fee project delivery
  • task_altTransparent communication and reporting
3. What can accountants do for an acquisition or investment deal?

Professional M&A accountants verify financial statements, test working-capital trends, analyse profitability, and ensure tax and compliance readiness.

We validate assumptions, model returns, and identify potential risks so you can negotiate from strength and avoid post-deal surprises.

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

When selecting your buy-side accounting partner, look for:

  • task_alt Proven transaction experience in your industry
  • task_alt Credentials such as ICAEW, CPA, or equivalent
  • task_alt Transparent fees and timelines
  • task_alt Integrated accounting, tax, and compliance expertise
  • task_alt Familiarity with cross-border regulations and reporting standards

The right advisor doesn’t just analyse numbers -they help you make smarter, faster investment decisions.

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

Typical services include:

  • task_alt Financial Due Diligence & Quality of Earnings Reviews
  • task_alt ATax Structuring & HMRC/IRS Clearance
  • task_alt Valuation & Deal Modelling
  • task_alt Working Capital and Net Debt Analysis
  • task_alt Completion Accounts Support
  • task_alt Post-Acquisition Integration & Group Accounting
6. How much do buy-side advisory services cost?

Pricing depends on transaction size, complexity, and required scope. Our fixed-fee packages start with a clear proposal covering due diligence, modelling, and tax review -no hidden surprises.

We also offer hourly consulting for ad-hoc support or specialist M&A analysis.

7. Will one person handle my buy-side engagement?

You’ll have a dedicated M&A accountant overseeing your entire project.

Behind them is a small specialist team -including tax, valuation, and financial-modelling experts -ensuring each aspect of your transaction is handled by the right professional.

8. How do you communicate with clients across regions?

We work with clients globally through secure cloud tools. Communication happens via your client portal, email, Zoom, or WhatsApp, with data stored safely under GDPR and US privacy standards.

You’ll receive real-time updates, dashboards, and concise reports throughout the deal cycle.

9. Do you provide cross-border M&A support?

Yes. 123Financials supports international acquisitions involving UK, US, and multi-jurisdiction entities.

Our team coordinates with local tax and legal professionals to ensure compliance with HMRC, IRS, and OECD regulations, while maintaining group efficiency and avoiding double taxation.

10. What makes 123Financials different from traditional M&A advisors?

Most M&A advisors stop at the transaction -we go further.

We combine deal execution with post-acquisition accounting, tax, and compliance, ensuring your new entity runs smoothly after completion.

Our advisory style is personal, proactive, and fully transparent -no jargon, no surprises, just measurable results.

Accounting Partners

We Deliver

Best Price

Quality Service

Good Support

Satisfaction

@2017-2024 123Financials, All rights reserved.