M&A Advisory

The M&A Process: Every Step Explained

The full merger and acquisition process from readiness through post-close, with real US timelines, documents, and where deals actually die.

Palmstone Capital Research8 min read

Deals die in the gaps.

The merger and acquisition process runs through ten stages, from internal readiness work to post-close integration, and it runs on two tracks at once. The seller is producing a teaser, a CIM, and a data room while the buyer is building a valuation model and lining up financing. Most explanations of mergers and acquisitions steps present a single linear list. That misses the part that actually determines whether a deal closes: the seller track and the buyer track have to move in parallel, and the stage where they fall out of sync is usually the stage where the deal dies.

US Main Street closings had a median time to close of 170 days in 2025, according to BizBuySell, ranging from 153 days for general small-business sales to 223 days for manufacturing. A prepared lower-middle-market sell-side process typically runs 6 to 9 months from preparation through close. A bilateral add-on for a private equity platform can close in 3 to 5 months. Anything touching public-company rules, cross-border buyers, a carve-out, or a Hart-Scott-Rodino Second Request can run 9 to 24 months or longer.

The synchronized roadmap: seller and buyer tracks

Below is what happens at each stage, on both sides, with the realistic duration and the document or decision that closes the gate.

Stage	Seller work product	Buyer work product	Realistic duration	Gate
1. Strategy and readiness	Objectives, shareholder alignment, tax and estate review, three years of clean financials	Acquisition thesis, target screen, financing capacity	2 to 8 weeks; longer if books need cleanup	Go/no-go and target value range
2. Preparation and market materials	Advisor selection, normalized EBITDA, teaser, CIM, data room, buyer list	Financing conversations, diligence checklist, valuation model	4 to 8 weeks	Approved materials, defensible EBITDA
3. Outreach, NDA, and initial review	Staged disclosure, NDA tracking, management access rules	Strategic fit review, preliminary model, financing feedback	3 to 6 weeks	Indications of interest
4. Management meetings and bids	Present forecast, answer diligence questions, compare terms	Management diligence, synergy case, financing confidence	2 to 4 weeks	Final bids, preferred buyer
5. LOI and exclusivity	Negotiate TEV, working-capital assumptions, rollover, earnout, escrow	Investment committee approval, sources and uses	1 to 3 weeks	Signed LOI, binding exclusivity
6. Confirmatory diligence	Financial, tax, legal, commercial, HR, cyber, IP, regulatory responses	Quality of earnings, customer calls, lender diligence	6 to 12 weeks	Proceed, re-trade, or walk decision
7. Definitive documents and financing	Disclosure schedules, consents, payoff letters, funds flow	Purchase agreement, debt commitments, transition-services terms	4 to 10 weeks, parallel with diligence	Signing-ready documents
8. Regulatory approval	HSR/CFIUS/sector filings, employee notices	Regulatory advocacy, integration planning without operational control	30 days to 12+ months	Conditions precedent satisfied
9. Signing and closing	Bring-down certificates, releases, cash and equity receipts	Funding, equity issuance, transfer of ownership	Same day if simultaneous; 30 to 120+ days if split	Legal ownership transfers
10. Post-close true-up and integration	Transition support, earnout reporting	Working-capital true-up, Day 1/30/100 integration	60 to 120 days for true-up; 12 to 36 months for earnout	Final price adjustment

Diligence, contract drafting, financing, regulatory filings, and integration planning are not sequential in a well-run deal. They start in parallel once the LOI is signed. Treating them as a straight line is one of the more common reasons a signing date slips past the outside date in the purchase agreement.

Where the process changes by deal size

The stages above hold across sizes. What changes is the paperwork weight and who is on the other side of the table.

An owner-operated business under $500,000 in enterprise value typically sells to an individual buyer or a local competitor at 1.5x to 2.75x SDE, financed largely with an SBA loan and a seller note, closing in roughly 150 to 200 days. A company in the $5 million to $25 million range typically draws lower-middle-market private equity, family offices, or a strategic add-on buyer, pricing around 4.5x to 7.0x adjusted EBITDA, with a debt package (senior plus subordinated) built by the buyer's lender group and a process running closer to 6 to 9 months. Above $25 million, expect a fuller diligence workstream list, committee-level buyer approvals, and, past the current $133.9 million HSR threshold, a federal antitrust filing that adds a 30-day waiting period before closing can occur at all.

Key documents at each step

Teaser. A one to two page anonymized summary sent before any NDA is signed. States the opportunity without naming the company.
CIM (confidential information memorandum). The full narrative and financial package, released after NDA execution, that supports management's ask and frames the buyer's model.
IOI (indication of interest). A non-binding early letter stating a price range and structure, used to narrow the buyer list before management meetings.
LOI (letter of intent). The document that sets enterprise value, the cash/debt-free and working-capital assumptions, rollover, earnout, escrow terms, and exclusivity. Price and the obligation to close are usually non-binding. Confidentiality, exclusivity, expense allocation, and governing law are usually binding. The document itself controls which parts bind and which don't, so read it as written rather than by convention.
SPA (stock or asset purchase agreement). The definitive, binding contract: representations and warranties, indemnification, disclosure schedules, closing conditions, and the purchase-price mechanism.

Each of these exists to control what information moves, and when. A teaser goes out with no NDA. The CIM goes out only after NDA. Customer-identifiable or competitively sensitive data goes out later still, often through a clean team, particularly when a strategic buyer is also a competitor. Sharing unrestricted customer-level pricing with a competing buyer before close is the kind of gun-jumping conduct that can create antitrust exposure independent of whether HSR applies.

Where deals actually die

The working-capital and debt-like items definition gets left until the purchase agreement. Deferred revenue, accrued bonuses, customer deposits, and unpaid capex can shift the effective price by a meaningful amount after everyone believed the number was settled at LOI.
EBITDA add-backs don't survive quality of earnings. Personal expenses, vacant-role savings, and one-time claims without invoice or payroll support get cut in QoE, which lowers both the multiple applied and the buyer's debt capacity, and often triggers a re-trade.
A change-of-control or license matrix wasn't built before the LOI. A lost customer contract, a lease that requires landlord consent, a Medicare provider enrollment, a liquor permit, or an IP license that doesn't transfer can make the structure the parties agreed to impossible to execute.
Regulatory timing wasn't priced into the outside date. HSR waiting periods, CFIUS review, healthcare change-of-ownership filings, and state licensing can outlast financing commitments and exclusivity windows, forcing a renegotiation or a lapsed deal.
The business slips during the process itself. Management distraction, a departed key employee, or delayed capital spending during a six-to-nine month process produces exactly the kind of trailing-EBITDA softness that gives a buyer grounds to re-trade at signing.

A worked example

A $12 million-revenue distribution business runs $2.4 million of adjusted EBITDA. At a market range of 4.5x to 7.0x for that size tier, indicative enterprise value lands between $10.8 million and $16.8 million. Say buyer and seller land on 5.5x, or $13.2 million TEV. The seller carries $2.0 million of funded debt and $500,000 of transaction expenses, and agrees to a $1.0 million seller note and $600,000 held in escrow for 18 months. Cash at close works out to roughly $13.2 million minus $2.0 million debt, minus $500,000 fees, minus $1.0 million seller note, minus $600,000 escrow, or about $9.1 million received at signing, with the note and escrow following over the next one to two years. The headline multiple and the cash the seller actually banks at closing are two different numbers, and the gap is the working-capital adjustment, the debt payoff, the fees, and whatever structure got built into the LOI.

FAQ

How long does the merger and acquisition process take?

Main Street closings had a 170-day median in 2025. A prepared lower-middle-market sale typically runs 6 to 9 months; regulated, public, cross-border, and carve-out deals can run 9 to 24 months or longer.

Is a letter of intent legally binding?

Price and the obligation to close are usually non-binding. Confidentiality, exclusivity, access rights, expense allocation, and governing law are commonly binding. The document controls which provisions bind, so it has to be read carefully rather than assumed. See our letter of intent template for how the binding and non-binding sections are typically split out.

What's the difference between a teaser, a CIM, an IOI, and an LOI?

A teaser is anonymized and goes out before any NDA. A CIM is the full financial package released after NDA. An IOI is an early non-binding price indication used to narrow the buyer list. An LOI is the document that sets enterprise value and deal structure and moves the parties into exclusivity.

When does a seller give a buyer financial statements and customer data?

A teaser goes out before NDA. The CIM and summarized financials go out after NDA. Customer-identifiable or competitively sensitive data goes out later, through staged access or a clean team, particularly where the buyer is also a competitor.

Should the deal be structured as an asset sale or a stock sale?

Sellers generally prefer stock sales for capital-gain tax treatment and a cleaner exit from liabilities. Buyers often prefer asset deals for the tax basis step-up and the ability to select which liabilities they assume. Contract assignability, licensing, C corporation double taxation, and elections like section 338(h)(10) can override either side's initial preference.

Can a seller keep talking to other buyers after signing an LOI?

Usually not during the negotiated exclusivity period. Exclusivity should have a defined end date and buyer milestones tied to it, rather than open-ended or automatically renewing terms.

Talk to us

If you're weighing a sale, an acquisition, or a recapitalization and want to know what the process looks like for a company your size, get in touch for a confidential conversation. We'll tell you plainly what a realistic timeline, structure, and range look like before anything moves to a teaser or an LOI.