Mergers and Acquisitions: How M&A Valuation Works from Letter of Intent to Close

M&A valuation uses the same core methods as equity valuation — DCF, comparable companies, and precedent transactions — but applies them with deal-specific adjustments that change the numbers meaningfully. A DCF model for M&A projects the target's free cash flow under the acquirer's ownership, not as a standalone company. This means including projected synergies — cost savings from eliminating duplicate roles, revenue gains from cross-selling, or operational improvements from combining systems. Synergies are real, but they are also the most commonly overestimated component of any deal model. A good rule of thumb from experienced dealmakers: cut the projected synergies by 30-50% and delay the timeline by a year. If the deal still makes sense with those adjustments, the valuation is defensible. Comparable transactions (also called precedent transactions) look at what acquirers actually paid for similar companies in recent deals. The key metric is the acquisition multiple — typically EV/EBITDA or EV/Revenue for the target company. If the last five SaaS acquisitions in your space were done at 8-12x revenue, that is your range. The advantage of precedent transactions is that they include a control premium — the extra amount buyers pay above the trading price to gain control. This premium averages 20-40% for public companies. Trading multiples (comparable companies) provide a baseline — what the market would pay for the company if it stayed public. You then add a control premium to get the acquisition price. If the company trades at 15x forward earnings and the control premium is 30%, the implied acquisition P/E is about 19.5x. In practice, acquirers run all three methods and triangulate. The range gives them their negotiating zone — what they can pay and still create value for their shareholders. Overpaying destroys acquirer value, and the data shows that 60-70% of acquisitions fail to create value for the acquirer's shareholders. The premium paid is usually the culprit.

An M&A transaction has a sequence that is remarkably consistent whether the deal is $10 million or $10 billion. It starts with the initial approach — either the buyer contacts the target directly, or an investment bank runs a process where multiple potential buyers are contacted simultaneously (an auction). The auction creates competitive pressure that drives up the price, which is why sellers prefer it and buyers prefer bilateral negotiations. If there is mutual interest, the parties sign a Letter of Intent (LOI) or term sheet. This is a non-binding document that outlines the proposed purchase price, deal structure (cash, stock, or combination), key conditions, and a timeline. The LOI typically includes an exclusivity period (30-90 days) during which the seller cannot negotiate with other buyers. This gives the buyer time to conduct due diligence without competition. Due diligence is where the buyer verifies everything the seller claimed. Financial due diligence examines the target's books — are revenues real, are expenses properly categorized, are there hidden liabilities? Legal due diligence reviews contracts, litigation, IP ownership, and regulatory compliance. Operational due diligence examines the business itself — customer concentration, employee retention risk, technology infrastructure, and competitive positioning. This process typically takes 4-12 weeks and involves dozens of people. After due diligence, the parties negotiate and sign the Definitive Agreement (the actual binding contract). This is far more detailed than the LOI — it includes representations and warranties, indemnification provisions, closing conditions, and the specific deal mechanics. Between signing and closing, regulatory approvals may be needed (antitrust review for large deals). Closing is when money changes hands and ownership transfers.

How the buyer pays matters as much as how much they pay. Deal structure affects the seller's risk, tax treatment, and the effective price they actually receive. All-cash deals are simplest. The seller receives cash at closing and is done. The advantage for sellers is certainty — they know exactly what they are getting. The disadvantage is that cash deals are typically taxable as capital gains immediately. For the buyer, cash deals require financing (either from cash on hand or debt), which adds interest expense and reduces the return on investment. All-stock deals give the seller shares in the acquiring company. The advantage is potential tax deferral (in a tax-free reorganization) and participation in future upside. The disadvantage is that the shares may decline in value after closing — the seller bears the risk that the acquirer's stock drops. If the acquirer's stock falls 20% before the seller can sell, the effective purchase price was 20% less than the headline number. Earnouts tie a portion of the purchase price to the target's future performance. For example, the buyer pays $80 million at closing plus up to $20 million if the target hits certain revenue or EBITDA targets over the next two years. Sellers should be cautious about earnouts — the buyer controls the business post-closing and can make decisions that affect whether targets are hit. Earnout disputes are one of the most litigated areas of M&A. Escrows hold a portion of the purchase price (typically 10-15%) in a third-party account for 12-18 months after closing. If the buyer discovers problems that the seller warranted did not exist (undisclosed liabilities, customer losses, etc.), they can claim against the escrow. Whatever remains in escrow after the period expires goes to the seller. FinanceIQ includes worked examples of how escrows and earnouts affect the effective price a seller receives.

About 20% of deals that reach the LOI stage fail to close. Due diligence findings are the most common reason. Customer concentration is the single most dangerous finding. If one customer represents 30%+ of revenue and that customer does not have a long-term contract, the acquirer faces the risk that the customer leaves post-acquisition. Many deals have been repriced or killed because the top customer said during a reference check that they were considering switching vendors. Accounting irregularities — even unintentional ones — create distrust and can unravel a deal. Revenue recognition issues (booking revenue before it is earned), inflated accounts receivable (sending invoices that will never be collected), and undisclosed related-party transactions are the most common findings that cause buyers to walk. Litigation exposure that the seller did not disclose is a deal-breaker. If the buyer discovers a pending lawsuit with potential damages that exceed the escrow, the economics of the deal change dramatically. Full disclosure before due diligence is always better than having the buyer discover it themselves — discovery during diligence destroys trust. Key employee flight risk threatens the value the buyer is acquiring. If the target's value depends on three engineers or one sales executive, and those people do not want to work for the acquirer, the buyer is paying for an asset that will walk out the door. This is why retention packages and employment agreements are negotiated as part of the deal, and why failing to lock down key employees can kill a transaction. This content is for educational purposes only and does not constitute financial advice.