Building Your Deal Team: What the M&A Attorney, CPA, Wealth Manager, and Investment Banker Each Do
Erik James Roberts — Founder & CIO, Infinitus Wealth Management. Purple Heart recipient, Wharton MBA.
Updated September 11, 2026
Selling a business is a team sport, and the four seats matter more than the size of the check. Building your deal team means putting four specific seats in place before you go to market: an investment banker who runs the sale process, an M&A attorney who protects the terms, a CPA who defends your earnings and shapes the tax bill, and a wealth manager who turns the proceeds into a portfolio built to last. Each seat answers a different question, and each one is at its most valuable when it is filled early. This guide covers who does what, the order to hire them, what each costs in 2026, and how the four work together from the first conversation through the years after closing.
Most owners have sold exactly one business by the time they sell theirs. The buyer across the table, whether a private equity group or a strategic acquirer, has often bought dozens. A well-built deal team is how you close that experience gap on day one, and it is the single most controllable factor in how your exit turns out.
Why Building Your Deal Team Early Changes the Outcome
Building your deal team early works because the most valuable work in a sale happens before anyone signs a letter of intent. Financial cleanup, entity structuring, tax planning, and the decision about how the proceeds will be invested all produce better results when there is runway. Once you are in exclusivity with a buyer, your leverage is largely spent and the calendar belongs to them.
A practical rule: fill all four seats twelve to twenty-four months before you plan to go to market. That sounds early, and it is meant to. Some of the highest-return moves, like a sell-side quality of earnings report or a pre-sale trust strategy, only work if they are done well before a buyer is in the picture.
Here is what each seat actually does.
The Investment Banker: Runs the Process and Creates the Market
The investment banker's job is to run a competitive sale process that produces the best price and terms the market will bear. That means preparing the marketing materials (the confidential information memorandum, or CIM), building and contacting a curated buyer list, managing a data room, fielding indications of interest, running management meetings, and negotiating letters of intent so you are choosing among strong offers rather than reacting to one.
The banker's value is competition. A single buyer sets the price. Three qualified buyers bidding against each other set a different price, and the banker's buyer relationships and process discipline are what create that field.
A note on terminology, because it affects both fees and fit. A business broker typically handles Main Street deals under about $5 million. An M&A advisor generally works in the lower middle market, roughly $2 million to $50 million, and usually holds securities licenses. An investment bank focuses on larger transactions, typically above $50 million, and brings broader buyer reach and capital markets capability. For most owner-led companies, the right seat is an M&A advisor or a boutique investment bank whose senior people will stay on your deal rather than hand it to associates.
What to look for: recent closed deals in your industry and size range, a written buyer list you can review, a senior banker who commits to your process personally, and an engagement letter with a creditable retainer and a narrowly defined tail provision.
The M&A Attorney: Protects What You Negotiated
The M&A attorney turns the deal you negotiated into the deal you actually get. The letter of intent captures price and headline terms in a few pages. The purchase agreement that follows can run well over a hundred pages, and that is where value is quietly won or lost: representations and warranties, indemnification caps and baskets, escrow and holdback amounts, working capital targets and true-ups, earnout definitions, non-compete scope, and the employment or consulting agreement that governs your own transition.
This is specialist work. Your longtime corporate counsel may be excellent, and still not be the right person to negotiate a purchase agreement against a private equity firm's deal counsel. An attorney who has closed dozens of transactions knows what is market, what is aggressive, and which clauses are worth spending negotiating capital on. Building your deal team with a true M&A specialist in this seat is one of the clearest upgrades an owner can make.
What to look for: a practice focused on M&A rather than general business law, experience opposite the type of buyer you expect, and a willingness to quote a fee range for the transaction up front.
The CPA: Defends the Number and Shapes the Tax Bill
The CPA on your deal team has two distinct jobs, and it is worth understanding both.
The first is defending your earnings. Buyers price businesses on a multiple of EBITDA, and every buyer will commission its own quality of earnings (QoE) analysis after the letter of intent to test that number. A sell-side QoE, commissioned by you before going to market, does that testing first: it validates revenue, identifies defensible add-backs, normalizes EBITDA, and surfaces issues while you still have leverage to explain them. Sell-side QoE reports have become close to standard in middle-market processes, and for good reason. A QoE is an accounting engagement, not an audit and not a valuation, and it is performed by a CPA or transaction advisory firm.
The second job is tax. The structure of the sale (asset versus stock, C-corporation versus pass-through, installment treatment, allocation of purchase price, Section 1202 qualified small business stock eligibility, state residency and sourcing) can move the after-tax outcome by a meaningful percentage of the price. Most of those decisions are made or foreclosed before the LOI is signed, which is why the CPA belongs on the team early.
What to look for: transaction experience, not just compliance work. Ask how many sales the firm has advised on, whether they have produced sell-side QoE reports, and how they coordinate with the M&A attorney on structure.
The Wealth Manager: The One Seat That Outlasts the Deal
The wealth manager's job on a deal team is to make sure the sale produces the life you wanted it to, and that job starts long before closing and continues for decades after. The banker, attorney, and CPA are largely finished when the wire lands. The wealth manager is just getting started.
Before the sale, the wealth manager builds the financial picture that answers the question every owner eventually asks: what number do I actually need? That analysis shapes how hard to negotiate on price versus terms, how much rollover equity you can comfortably accept, and whether an earnout is a risk you can afford. It also drives pre-sale planning that the attorney and CPA execute, such as gifting or trust strategies that need to be in place while the business is still valued as a private company. With the 2026 federal estate and gift exemption at $15 million per person, pre-sale transfers of business interests are a live opportunity for many owners, and they only work if they are done before a purchase price exists.
At closing, the wealth manager coordinates where the proceeds land, in what accounts, and in what order, so that money is not sitting idle or exposed while the other three seats wrap up.
After closing, the real work begins. For most owners, the sale converts a single concentrated asset into liquid capital for the first time in their lives. That capital has to generate income, grow, and hold its value through markets that will not care that you just sold your company. At Infinitus, that means a custom portfolio of individual stocks and bonds, built around your specific income needs, tax situation, and horizon, and managed actively as those change. Not a model portfolio. Not a fund-of-funds. A portfolio designed for the person who just spent twenty years building something.
What to look for: a fee-only fiduciary who is legally obligated to act in your interest, transparent pricing you can evaluate, and an investment process you can understand and see in your own accounts. Infinitus charges a single advisory fee, 1.00% under $1 million, 0.95% from $1 million to $4.99 million, 0.90% from $5 million to $9.99 million, and 0.80% above $10 million, with financial planning included for investment management clients and no commissions on anything.
Building Your Deal Team: Sequencing and Who Leads When
Building your deal team in the right order matters as much as choosing the right people. A workable sequence for an owner twelve to twenty-four months out:
Wealth manager first. The "what number do I need" analysis and the pre-sale planning window drive everything downstream, and this is the seat that gives the other three their marching orders on structure and timing.
CPA second. Sell-side QoE, entity and tax structuring, and financial cleanup take months, and their output feeds directly into the banker's marketing materials.
M&A attorney third. Engaged before the banker's engagement letter is signed, so the attorney can review it, and well before any LOI.
Investment banker fourth. Engaged once the financials are defensible and the structure is set, so the process launches from a position of strength.
Leadership rotates by phase. The banker leads from launch through LOI. The attorney leads from LOI through signing. The CPA is heaviest during diligence and at closing. The wealth manager leads before launch and after closing, and coordinates across the middle. A team where everyone knows whose phase it is moves faster and makes fewer mistakes.
What Building Your Deal Team Costs in 2026
Professional fees are the largest controllable cost of a sale, and they are worth understanding precisely. Benchmarks for a lower-middle-market transaction in 2026:
Investment banker or M&A advisor. Axial's 2026 M&A Fee Guide, based on a Q2 2026 survey of 331 advisors, puts effective success fees at roughly 3.4% of transaction value at $20 million, compressing to about 2.0% at $100 million; earlier Firmex and Axial data put the figure near 4.8% at $5 million. Monthly retainers typically run $5,000 to $25,000 and are usually credited against the success fee at closing. Tail provisions of 12 to 24 months are standard, and should apply only to buyers on a written list. Business brokers on deals under $5 million generally charge straight commissions of 8% to 12% with minimum fees.
M&A attorney. Budget roughly $100,000 to $250,000 in legal fees for a lower-middle-market sale, with the range driven by deal complexity and the number of negotiation rounds. Well-organized diligence is the most reliable way to keep this at the low end.
CPA and sell-side QoE. Full-scope sell-side QoE reports from boutique firms generally run $25,000 to $50,000 for businesses with $3 million to $10 million of EBITDA, with lighter-scope reports around $15,000 to $25,000 for smaller companies and $50,000 to $75,000 or more above $10 million of EBITDA. Transaction tax planning is typically billed hourly on top.
Wealth manager. A fee-only advisor charges a percentage of assets managed, with no transaction charge tied to the sale itself. At Infinitus, pre-sale planning is part of the ongoing relationship, not a separate line item.
For a $20 million sale, the three transaction seats together will typically cost somewhere in the range of 4% to 6% of the price. That is real money. It is also the cost of running a process that regularly adds more than that back in price, terms, and after-tax proceeds. The right frame is return on fees, not fees alone.
How the Four Seats Work Together
A deal team is only as strong as its handoffs. The banker's CIM relies on the CPA's normalized EBITDA. The attorney's purchase agreement relies on the CPA's structure decisions and the banker's negotiated LOI. The wealth manager's plan relies on all three producing a net number, and the wealth manager's pre-sale analysis tells all three what a good outcome looks like in the first place.
The practical implication: introduce your advisors to each other early, put them on the same calls, and give one of them the job of quarterback. In our experience the wealth manager is often the natural choice, because that is the seat with the longest view of your goals and the only one still on the field after closing.
Frequently Asked Questions About Building Your Deal Team
Who should I hire first when selling my business?
Start with the wealth manager and the CPA, ideally twelve to twenty-four months before going to market. The wealth manager defines the number you need and opens the pre-sale planning window; the CPA cleans up the financials and sets the tax structure. The M&A attorney and investment banker come next, once the foundation is in place.
What is the difference between an M&A advisor and an investment banker?
Mostly deal size and licensing. M&A advisors typically work on lower-middle-market deals from roughly $2 million to $50 million. Investment banks focus above $50 million and bring broader buyer reach and capital markets capability. Business brokers handle Main Street deals under about $5 million. All three run a sale process; the fit depends on your company's size and buyer universe.
Do I need a sell-side quality of earnings report?
For most companies with more than about $2 million of EBITDA, yes. Every serious buyer will commission its own QoE after the LOI. Doing yours first means you know your defensible EBITDA before buyers do, and it substantially reduces the chance of a late-stage price renegotiation.
Can my longtime business attorney handle the sale?
Your existing counsel can play a valuable supporting role, but the purchase agreement should be negotiated by an attorney whose practice is focused on M&A. The terms that determine what you actually keep, from indemnification caps to working capital true-ups, are specialist territory.
What does a wealth manager do before a business sale?
Three things: defines the after-tax number that funds your goals, drives pre-sale planning such as gifting or trust strategies that must be completed while the company is still private, and designs the portfolio the proceeds will fund so the capital is working from the day it arrives.
How much does a deal team cost in total?
For a lower-middle-market sale, the banker, attorney, and CPA together typically run 4% to 6% of transaction value, with the banker's success fee the largest component. The wealth manager charges an ongoing percentage of assets managed rather than a transaction fee.
Ready to Build Your Deal Team?
If you are one to two years from a sale, the most valuable step you can take today is to start the conversation with the seat that outlasts the deal. Infinitus works with business owners well before closing to define the number, coordinate the planning, and design the custom portfolio of individual stocks and bonds that the proceeds will fund. If you do not already have an M&A attorney, transaction CPA, or investment banker, we can introduce you to professionals we know and trust for your industry and deal size.
Disclosures. Infinitus Wealth Management is a registered investment adviser. Registration does not imply a certain level of skill or training. This article is provided for general informational and educational purposes only and does not constitute investment, legal, tax, or accounting advice, nor an offer or solicitation to buy or sell any security. Fee benchmarks, cost ranges, and tax figures cited are drawn from third-party industry sources and public data current as of the publication date, are illustrative only, and will vary by transaction, provider, and jurisdiction. Nothing herein should be construed as a recommendation regarding the sale of any business. Readers should consult their own attorney, CPA, and other qualified professionals regarding their specific situation. Charts and figures are illustrative and hypothetical and are not predictions of future results. Investing involves risk, including the possible loss of principal. Past performance is not indicative of future results. Infinitus Wealth Management's advisory fee schedule is described in its Form ADV Part 2A, available upon request.
