What Does an M&A Attorney Do? (And When You Need One)

An M&A attorney runs the legal side of buying or selling a business. They draft the letter of intent, manage due diligence, negotiate the purchase agreement, and coordinate the closing. That's the textbook answer.

Here's what that actually means in practice: they're the person who catches the $800,000 indemnification exposure buried on page 47 of the purchase agreement. They're the one who spots that the seller's biggest customer contract has a change-of-control provision that could terminate the day after closing. They're the reason a deal closes in 90 days instead of dragging on for a year.

I've closed over 400 M&A transactions. In that time, I've watched business owners lose hundreds of thousands of dollars - sometimes millions - because they either skipped M&A counsel entirely or hired someone who had no business being near an acquisition. This is the guide I wish those clients had read first.

The 5 Things an M&A Attorney Actually Does

Every M&A transaction follows roughly the same arc. Your attorney's job maps to each stage.

1. Letter of Intent (LOI) - Setting the Deal Framework

The LOI is where most deals are won or lost. Not at the closing table. At the LOI.

Most people think of the letter of intent as a formality - a handshake on paper before the "real" negotiation begins. That's wrong. The LOI establishes the purchase price range, deal structure (asset vs. stock), exclusivity period, due diligence timeline, and key terms that become extremely difficult to renegotiate later.

Your M&A attorney's job at this stage:

• Draft or review the LOI to ensure it protects your position - whether you're buying or selling
• Negotiate binding vs. non-binding provisions. Some LOI terms (exclusivity, confidentiality) should be binding. Most others shouldn't. Getting this wrong limits your leverage for the rest of the deal
• Set the due diligence scope and timeline so both sides know what's expected
• Flag structural issues early - things like change-of-control provisions, non-transferable licenses, or regulatory approvals that could kill the deal months later

2. Due Diligence - Finding What's Hidden

Due diligence is where most of the actual work happens. Your M&A attorney is reviewing contracts, corporate records, litigation history, regulatory compliance, intellectual property, employment agreements, real estate leases, and environmental issues. All while managing a timeline that's usually too short.

Here's what that looks like in practice:

• Contract review. Every material contract - customer agreements, vendor agreements, leases, loan documents. The attorney is looking for change-of-control provisions, assignability restrictions, termination rights, and unfavorable terms that affect the business post-closing
• Corporate records. Articles of incorporation, bylaws, board minutes, shareholder agreements. Are there minority shareholders with blocking rights? Outstanding stock options? Unresolved corporate governance issues?
• Litigation and liabilities. Pending lawsuits, threatened claims, regulatory investigations, product liability exposure. These become indemnification issues in the purchase agreement
• Employment matters. Key employee agreements, non-compete enforceability, benefits obligations, pending HR claims. Will the people who make the business run actually stay after closing?
• Regulatory compliance. Industry-specific licenses, permits, environmental compliance, data privacy obligations. Non-transferable licenses can stop a deal entirely

The output of due diligence is a memo that catalogs every risk the attorney identified. Some of those risks become negotiation points. Some become deal terms. Some - in a few cases - kill the deal. And that's a good outcome. Better to walk away from a bad acquisition than to close it and discover the problems after you've signed the check.

3. Purchase Agreement - The Document That Actually Matters

If the LOI is the outline, the purchase agreement is the book. It's typically 40–80 pages plus exhibits, and every sentence matters. This is where your M&A attorney earns their fee - or where a general attorney's inexperience costs you.

The purchase agreement covers:

• Purchase price mechanics. Not just the headline number, but how it's calculated - working capital adjustments, earnouts, holdbacks, escrow arrangements. A $10M deal with a $2M earnout and $1M holdback is really a $7M deal on day one
• Representations and warranties. The seller makes specific statements about the business - its financial condition, legal compliance, contracts, employees, IP, tax obligations. If any of these turn out to be false, the buyer can make indemnification claims. The scope, qualifiers, and survival periods of these reps are some of the most heavily negotiated provisions in any deal
• Indemnification. Who pays when something goes wrong after closing? The indemnification section sets caps, baskets (deductibles), survival periods, and procedures for claims. This is where inexperienced attorneys leave millions on the table. An uncapped indemnification provision could put your entire sale proceeds at risk
• Covenants. What each party agrees to do (or not do) between signing and closing, and sometimes after closing. Non-compete agreements, transition assistance, employee retention commitments
• Conditions to closing. What has to happen before the deal can close - third-party consents, regulatory approvals, financing conditions, material adverse change provisions

4. Ancillary Documents - Everything Else the Deal Needs

The purchase agreement is the main event. But every deal also needs a stack of supporting documents that your M&A attorney drafts, reviews, or negotiates:

• Employment and consulting agreements for the seller and key employees staying post-closing
• Non-compete and non-solicitation agreements - scope, duration, geographic reach, enforceability
• Escrow agreements governing funds held back for indemnification
• Transition services agreements for sellers who assist the buyer post-closing
• Third-party consents - landlords, key customers, lenders, licensors
• Bill of sale, assignment agreements, IP assignments - the documents that actually transfer ownership of the assets
• Disclosure schedules - the seller's detailed exceptions to the representations in the purchase agreement

These documents don't get the attention that the purchase agreement does. That's exactly why problems hide in them. A poorly drafted non-compete can leave a seller free to open a competing business across the street. A missing IP assignment can mean the buyer doesn't actually own the software they thought they were acquiring.

5. Closing Coordination - Getting Across the Finish Line

Closing an M&A transaction involves coordinating between the buyer, seller, their respective counsel, lenders, title companies, escrow agents, and sometimes regulatory bodies. Your M&A attorney manages the closing checklist, confirms all conditions are satisfied, arranges fund flows, and ensures every document is properly executed.

This sounds administrative. It's not. Deals fall apart at closing more often than people realize. Common closing-day issues:

• A third-party consent arrives with conditions nobody anticipated
• The lender changes funding terms at the last minute
• A key employee resigns the week of closing
• Working capital numbers come in below the target, triggering a purchase price adjustment
• A regulatory approval is delayed

An experienced M&A attorney has seen all of these before and knows how to handle them without blowing up the deal. An inexperienced one panics, calls you in a frenzy, and suddenly a solvable problem becomes a reason to delay or renegotiate.

When Do You Actually Need an M&A Attorney?

Not every business transaction requires M&A counsel. Here's where the line is.

You Need an M&A Attorney If:

• The deal involves a formal purchase agreement (not just a bill of sale)
• The transaction value is over $500,000
• The deal includes earnouts, seller financing, or working capital adjustments
• There are regulatory approvals or third-party consents required
• The target business has employees, contracts, or IP that need to transfer
• You're acquiring a company with potential liabilities (lawsuits, environmental, tax)
• You're selling and want indemnification protections that actually work

You Might Not Need One If:

• You're buying a simple asset (equipment, inventory) with no ongoing business operations
• The transaction is under $100,000 and involves minimal complexity
• There's no purchase agreement - just a bill of sale and payment

When in doubt, at least get a consultation. A one-hour conversation with an M&A attorney ($300–$500) can tell you whether you need full representation or whether a general business attorney can handle your specific situation.

M&A Attorney vs. General Business Attorney - Why It Matters

This is the most expensive mistake I see. A business owner has a trusted attorney - someone who's drafted their operating agreement, reviewed their leases, maybe handled an employment dispute. So when it's time to buy or sell a business, they call the same person.

It makes sense emotionally. It's a disaster financially.

The $10,000–$35,000 difference in fees is a rounding error compared to what bad deal terms cost. I've seen it over and over: a seller saves $20,000 by using their general attorney and then loses $500,000 because the purchase agreement had uncapped indemnification, a below-market working capital target, and an unachievable earnout formula.

How to Choose an M&A Attorney

Not all M&A attorneys are equal. Here's what to look for and what to ask.

Questions to Ask Before Hiring

1. "How many M&A deals did you close last year?" - You want someone who closes 20+ per year. If they say "a few" or "it depends," keep looking.
2. "Have you handled deals this size and in this industry?" - A $50M deal and a $2M deal are different animals. A manufacturing acquisition and a SaaS acquisition have completely different due diligence concerns.
3. "Who will actually work on my deal?" - At large firms, the partner sells and the associate executes. Make sure you know who's doing the work and their experience level.
4. "Can you give me a clear cost estimate?" - If they can't estimate the cost within a reasonable range, they either don't do enough M&A work to predict the scope or they don't want to commit. Neither is good.
5. "What's your approach to indemnification?" - This is a trick question. If they don't immediately understand what you're asking, or if they give a generic answer, they don't do enough M&A work. A real M&A attorney will have a detailed philosophy on caps, baskets, survival periods, and claim procedures.

Red Flags

• They can't explain the difference between an asset purchase and a stock purchase off the top of their head
• They don't ask about your deal's working capital mechanics
• They quote hourly rates without any cost estimate for the full engagement
• Their website lists M&A as one of 15 practice areas (jack of all trades, master of none)
• They've never negotiated an earnout

What an M&A Attorney Costs

Let's talk fees directly, because I know this is what you're searching for.

Most M&A attorneys bill hourly - $300 to $700 per hour depending on market and experience. That makes total cost unpredictable. You could budget $30,000 and end up at $65,000 because due diligence took longer than expected or negotiations dragged on.

The Three Fee Structures (And Which One Protects You)

This is one of the biggest sources of confusion I see - business owners getting quotes from three firms and comparing completely different fee models. Here's what each one actually means:

That's one of the reasons we built Acquisition Stars around transparent, competitive pricing with the managing partner on every deal. You get extensive M&A experience at competitive rates. No watching the clock every time you call your attorney with a question.

Your M&A Attorney Isn't Working Alone - The Deal Team

One thing nobody tells first-time buyers or sellers: your M&A attorney is one player on a team. Understanding who does what prevents confusion, duplicated work, and the "I thought my lawyer was handling that" disasters I see too often.

The M&A attorney typically coordinates the team. Not manages them - everyone has their own engagement - but drives the process and timeline. When the CPA's financial findings need to become purchase agreement provisions, the attorney translates. When the broker brings a buyer, the attorney qualifies the legal terms. When the lender has funding conditions, the attorney negotiates them into the closing mechanics.

A question worth asking before you hire: "How do you work with my CPA and broker?" If the answer is vague, that's a signal they don't do this often enough to have a process.

What Happens When You Skip M&A Counsel

I don't say this to sell you on hiring us. I say it because I've seen the wreckage.

I'm not sharing these to scare you. I'm sharing them because these are real patterns I see repeatedly - and they're all preventable. The business owner who posted on Reddit about buying a $400K business with a PandaDoc template and discovering hidden liens six months later? That post gets hundreds of replies every time someone shares it, because everyone in the comments has a similar story.

What Happens After the Deal Closes

Here's something no one mentions in "what does an M&A attorney do" articles: the work doesn't end at closing. Roughly 1 in 5 deals have some form of post-closing dispute within the first year. Your attorney needs to be available for what comes next.

Common Post-Closing Issues

• Working capital true-up. The purchase agreement sets a working capital target. Within 60–90 days of closing, the actual working capital is calculated and compared. If it's below target, the buyer gets a price reduction. If above, the seller gets additional payment. These calculations are frequently disputed - sometimes for hundreds of thousands of dollars
• Earnout disputes. If part of the purchase price is tied to post-closing performance, disagreements about how revenue or EBITDA is calculated are almost guaranteed. The buyer controls the business now - and their operational decisions directly affect whether the earnout is achieved
• Indemnification claims. A customer lawsuit surfaces. A tax liability appears. An environmental issue emerges. The buyer makes a claim against the seller under the indemnification provisions. How that plays out depends entirely on how those provisions were drafted
• Non-compete enforcement. The seller starts consulting in the same industry, or a key employee leaves and joins a competitor. The non-compete language - its scope, duration, and geographic limitations - determines whether you have a remedy
• Transition services breakdowns. The seller agreed to provide transitional support for 6 months. Month 3, they stop returning calls. What does the agreement say about that? If the answer is "not much," you have a problem

Before engaging an M&A attorney, ask: "What post-closing support is included in your fee? What happens if there's an indemnification claim or earnout dispute at month 8?" If they don't have a clear answer, they haven't thought past the closing dinner.

Questions You'll Wish You'd Asked Earlier

These come from conversations with clients and business owners who've been through M&A transactions - the questions they wished they'd asked their attorney before signing the engagement letter, not after the deal closed.

1. "Walk me through a deal that fell apart. What went wrong?" - Their answer tells you more about their experience than their website bio ever will.
2. "What's your realistic timeline for a deal this size?" - If they say "30 days" for a $3M acquisition, they're either lying or inexperienced. Most deals take 60–120 days.
3. "How do you handle disagreements with the other side's counsel?" - M&A negotiations get tense. You want someone who solves problems, not someone who escalates every disagreement into a war.
4. "What's your approach to working capital adjustments?" - This is a litmus test. If they hesitate or give a textbook answer, they don't do enough deals. Working capital is where experienced M&A attorneys save (or lose) clients six figures.
5. "What happens if I need you after closing?" - Earnout disputes, indemnification claims, and transition problems don't respect closing dates. Find out now whether post-closing support costs extra.
6. "Who on your team will I be communicating with day-to-day?" - At large firms, the partner pitches and the associate executes. Know who's actually doing the work before you sign.

How We Handle M&A at Acquisition Stars

I built this firm because I saw the same problems from both sides. At big firms, business owners were getting billed $500/hour by associates who'd never run a business, while the partner who sold the engagement barely touched the file. At small firms, general practitioners were taking on M&A work they weren't equipped to handle.

Here's what's different about how we work:

• I'm on every deal. Not an associate. Not a paralegal for the hard parts. I personally handle your transaction from LOI through closing. That's not scalable, and I know it. But it means you get the person with deep M&A experience working on your deal - not someone learning on the job with your money.
• Better rates, better attention. 15+ years of transaction experience without the large firm overhead. Call me at midnight with a question about the deal - I pick up. Ask me to review a document a fourth time - no problem. The incentive alignment is simple: I get paid to close your deal well, not to bill hours.
• Nationwide practice. We handle transactions across the country. Over 60% of our deals involve multi-state operations, out-of-state parties, or businesses with national footprints. Where needed, we coordinate with local counsel for state-specific requirements.
• Post-closing support included. Our engagement doesn't end at closing. Working capital true-ups, earnout calculations, indemnification claims - we're available for all of it. Because the deal isn't really done until the post-closing obligations are resolved.

Frequently Asked Questions

The Bottom Line

An M&A attorney's job is to protect you from the deal terms that could cost you far more than the deal itself is worth. They handle the LOI, run due diligence, negotiate the purchase agreement, draft every ancillary document, and get you across the closing table.

You can absolutely try to do this without one. People do. Some get lucky. Most end up learning expensive lessons about indemnification caps, working capital adjustments, and change-of-control provisions that they wish they'd learned before signing.

If you are considering buying or selling a business, submit your transaction details for review. We will provide an honest assessment of your situation and whether you need M&A counsel, along with what the engagement would look like.