The CPA's Guide to Helping Clients Sell a Business

Why Your Role Matters More Than Anyone Tells You

When an owner starts thinking about selling, you usually know before the spouse does. You have the QuickBooks login. You have the tax returns. You have the personal credit card running through the business. You know which siblings are on payroll. You know what the owner pulls out in distributions and what the business actually produces after that.

That means you are the only advisor in the world with the full picture before any buyer touches it. A broker or M&A advisor will get cleaned-up financials. A buyer will get a CIM. A lawyer will get a draft purchase agreement. You get the truth. How well you organize that truth — and how early — is the single biggest lever you have on the outcome.

Done well, your work adds five to fifteen percent to the final purchase price and removes most of the friction from diligence. Done late or sloppy, you watch a client take a price cut in week ten of a deal because the inventory write-downs you never adjusted for finally surfaced.

The Twenty-Four Month Window

The most valuable thing a CPA can do for a client thinking about a sale is to start the clock at twenty-four months out, not six. Almost every move that materially changes the after-tax outcome of a sale needs at least two clean tax years to land.

That includes:

• Restructuring entity type (LLC to S-corp election timing, or unwinding C-corp status where possible)
• Cleaning up personal expenses run through the business
• Documenting owner compensation at a defensible market rate
• Building two years of clean, accrual-basis financials buyers and lenders can trust
• Setting up the trust, gifting, or QSBS structure that will hold the proceeds

If your client mentions selling, your first job is to ask when — and if the answer is less than a year, tell them honestly that some of the planning windows have already closed. That conversation is hard but it preserves trust. Owners remember the CPA who told them the truth on day one.

Financial Cleanup: What Buyers Actually Read

Most small business books are kept for tax purposes — minimize income, maximize deductions, keep the IRS happy. Buyers read books for a completely different reason: they want to understand the real, repeatable earnings of the business going forward.

The gap between those two views is where deals die. Your job in the cleanup phase is to bridge it.

At minimum, buyers and their lenders will want:

• Three years of P&Ls and balance sheets, ideally on an accrual basis, with month-over-month consistency
• Trailing-twelve-month (TTM) financials updated through the most recent closed month
• Tax returns matched to the books, with reconciliations for any material differences
• A clean chart of accounts — no "miscellaneous" line over a few thousand dollars, no commingled personal expenses, no plug entries
• Revenue cut by customer, product line, or channel, not just one lump sum
• Working capital schedules — A/R aging, A/P aging, inventory roll-forward

If the books are cash-basis with thirty personal expenses a month, do not hand them to a buyer. Convert to accrual, separate the personal pieces into formal add-backs, and rebuild a clean trailing twelve before anyone outside the family sees a number.

The Add-Back Conversation

Add-backs are where CPAs earn their entire engagement fee in one schedule. Every dollar of legitimate, well-documented add-back flows directly into SDE or EBITDA, gets multiplied by the buyer's multiple, and lands in your client's pocket at close.

The categories that almost always belong:

• Owner's compensation above market, replaced with a market salary for the role
• Owner's personal benefits run through the business: vehicle, health insurance, phone, travel that was really personal, country club, family member salaries above market
• One-time, non-recurring expenses: a lawsuit settlement, a one-off equipment failure, a failed product launch, COVID-era PPP costs that will not repeat
• Discretionary spending the buyer will not continue: charitable contributions, owner's discretionary travel, a sponsorship of the owner's kid's team
• Rent paid above market to an owner-affiliated landlord (with a normalization to market rent)
• Depreciation and amortization (standard EBITDA adjustment)
• Interest expense that will be replaced by the buyer's capital structure

The categories that get pushed back hard:

• Marketing or R&D the owner stopped doing in the last twelve months
• "Growth" expenses that look an awful lot like normal operating costs
• Vague management fees with no documentation
• Add-backs for staff the buyer will actually need to keep

The rule of thumb: every add-back needs a paper trail. If you cannot produce the receipt, the invoice, or the contract, do not put it on the schedule. One unsupported add-back can erode buyer trust on the entire list.

Tax Planning That Actually Moves the Number

The headline tax issues in a small business sale are entity structure, asset versus stock sale, and state tax exposure. None of them are fixable in the last sixty days.

Entity structure. A C-corp sale almost always pushes the seller toward an asset sale that triggers double taxation — corporate-level gain on the sale of assets, then personal-level tax on the distribution. If your client is still a C-corp, the conversation about S-corp election or a holding-company restructure needs to start years before listing, not in diligence.

Asset vs. stock sale. Buyers want asset sales for the step-up in basis and the liability protection. Sellers usually prefer stock sales for the long-term capital gains treatment and the clean exit from contingent liabilities. The negotiated outcome is usually an asset sale with a 338(h)(10) or 336(e) election (for S-corps) — but the modeling of after-tax proceeds under each scenario is your work, not the M&A advisor's.

State exposure. If your client lives in a high-tax state and has been thinking about moving, the planning window matters. So does proper sourcing of the gain — a multi-state business may have allocation issues that quietly cost six figures if nobody runs the numbers.

Installment sales and seller financing. If the deal includes a seller note or an earnout, the installment method can spread the tax burden — but it interacts with depreciation recapture in ways most owners do not understand. Run the math.

QSBS, opportunity zones, and trust structures. For larger transactions, the planning that holds the proceeds matters as much as the planning that produces them. These are conversations to have before the LOI, not after.

A simple after-tax proceeds model — "here is what hits your bank account under three different deal structures" — is the single most useful artifact you can give your client before they start negotiating.

Knowing When to Bring in an M&A Advisor

One of the most common mistakes CPAs make is waiting too long to suggest a broker or M&A advisor — either because they want to protect the relationship, or because they think they can run the process themselves. Both instincts hurt the client.

The right time to refer is when the client moves from "thinking about it" to "ready inside twelve months." That gives the advisor time to package the business properly, build a buyer list, and run a real process. Wait until the client has a buyer already at the door and you have skipped the part of the process that creates competitive tension — which is the part that drives price.

When you make the introduction, do three things:

1. Introduce more than one. Two or three advisors so the client picks the right fit. Brokers for sub-$2M SDE businesses, M&A advisors or boutique investment banks above that.
2. Stay in the room. Tell the client you want to be on the diligence calls. Tell the advisor you want copies of the data room requests. Your continued involvement is how the client knows they have a quarterback, not a handoff.
3. Be clear about your role. You are the financial historian and the tax architect. The M&A advisor runs the process. The lawyer drafts the paper. Confusion about these lanes is where deals get slow and clients get nervous.

A good M&A advisor will be grateful for a CPA who has cleaned books, a defensible add-back schedule, and an after-tax model already on the table. A bad one will try to redo your work. Either way, your value is preserved by showing up prepared.

Coordinating with the Deal Team

Once the process is live, the deal team forms fast: M&A advisor or broker, transaction attorney, sometimes a wealth advisor for the proceeds, sometimes a Q of E firm hired by the buyer. Your seat at that table is the one nobody else can fill — you have the historical context everyone else is trying to reconstruct.

The rhythm that works:

• Weekly deal calls with the M&A advisor and attorney, even if there is no formal update
• Direct line to the Q of E team if the buyer commissions a quality of earnings report — answer their questions yourself rather than letting them go to the bookkeeper
• Real-time review of the data room before each diligence batch goes out
• A redline of the purchase agreement's financial schedules and definitions, especially the working capital target and the definition of "adjusted EBITDA"

The working capital target deserves its own paragraph. It is one of the most common places sellers lose six or seven figures at the closing table. The number is usually set as the trailing twelve-month average of net working capital, but the definition of what is in or out — cash, debt-like items, deferred revenue, customer deposits — is negotiated. If you are not redlining that section of the agreement, you are leaving money on the table.

Protecting the Client from Themselves

Somewhere in the middle of every deal, your client will want to do something that costs them money. Common examples:

• Take a large distribution "because it is my cash anyway" — which shifts the working capital target and reduces the price dollar for dollar
• Stop reinvesting in the business — which shows up in trailing financials and erodes the buyer's confidence
• Tell a key employee about the deal too early — which creates a retention problem the buyer will price into the offer
• Skip a depreciation election that would have meaningfully reduced the year-of-sale tax bill
• Sign an LOI without legal or tax review because they trust the buyer

Your job in those moments is to be the steady voice. Not to overrule the client, but to make sure they understand what each decision actually costs. A short email — "here is what happens to the price if you take the distribution; here is what happens to your tax bill if you skip the election" — is usually enough.

After the Close: The Part Most CPAs Miss

The close is not the end of the engagement. The twelve months after a sale are some of the most valuable advisory work you will ever do for that client.

Things that need to happen:

• Final tax return for the entity, with proper handling of the gain, any installment elections, and state allocations
• Personal tax planning for the year of sale — estimated payments, AMT exposure, charitable strategies, opportunity zone reinvestment if applicable
• Wealth management coordination — the proceeds need a home, and your client almost certainly does not have one yet
• Earnout and seller-note tracking if the deal has either, with quarterly reconciliations
• Working capital true-up, which usually happens sixty to ninety days post-close and requires your historical knowledge to defend

Clients who feel taken care of after the close refer their friends. Clients who feel handed off at the closing table do not. The relationship that started with you finding $30,000 of legitimate add-backs in their P&L can quite reasonably continue for the next twenty years.

A Short Checklist for the Pre-Sale Year

If you have a client who is twelve to twenty-four months from a sale, here is the working list:

• Confirm entity structure and run an after-tax proceeds model under at least two deal structures
• Convert books to accrual and rebuild a clean trailing twelve
• Build a defensible add-back schedule with documentation for every line
• Clean up the chart of accounts and separate personal from business
• Document owner compensation at market and identify the gap
• Identify and quantify any one-time or non-recurring expenses from the prior two years
• Confirm A/R, A/P, and inventory are stated accurately
• Run a working capital baseline so you know the negotiating starting point
• Reconcile tax returns to books and resolve any material differences
• Introduce the client to two or three M&A advisors or brokers, depending on deal size
• Discuss trust, gifting, and proceeds-holding structures before the LOI
• Schedule quarterly check-ins through the listing period