Best Seattle Fractional CFO Firms After an Acquisition (2026)

Best Seattle Fractional CFO Firms After an Acquisition (2026)

The seller's bookkeeper usually leaves with the seller. Sometimes on closing day, sometimes a month later after a polite handover that covers where the passwords are and not much else.

That is the moment a buyer discovers how much of the company's finance lived in one person's head. Bank access, payroll, who gets paid on which day, how month end actually closes. A Seattle fractional CFO is often the fastest way to put an owner on each of those before something breaks.

One firm in the Sam's List partner program lists a Washington base: System Six, in Seattle, which is written up below. It is the whole partner roster for the state rather than a shortlist. System Six is a paid featured member of Sam's List. You can read how this list was built at the end of the post.

What a Seattle Fractional CFO Does in the First 90 Days

The short answer: take over the finance function the seller ran, make it work the same way on day one, and then make it better once nothing is on fire.

That order matters. Buyers who arrive with a new chart of accounts and a new software stack in week one tend to lose a month of reliable numbers exactly when the lender wants the first report. Post-acquisition finance goes better when the first job is continuity and the second is modernization.

The limitation: a fractional CFO works part time by design. In the first ninety days the workload is heaviest, so confirm how many hours a week the engagement actually covers before closing, not after.

1. Cut Over Bank, Payroll and Bill Pay Without a Gap

Payroll is the one that cannot miss. Employees notice a late paycheck faster than any other finance failure.

The cutover list: bank signers and online access moved to the buyer, payroll provider access and tax accounts transferred or re-registered, recurring vendor payments identified before the seller's approvals stop working. In an asset purchase, the buying entity is often new, which can mean new accounts across the board.

The limitation: some of this depends on the seller's cooperation after closing. Put transition support terms in the purchase agreement, because goodwill runs out.

2. Build the Opening Balance Sheet

The day-one balance sheet is not the seller's last balance sheet. In an asset purchase the buyer allocates the purchase price across the assets acquired, and both buyer and seller generally report that allocation to the IRS on Form 8594. Working capital adjustments, earnouts and seller notes all need entries of their own.

This is where post-acquisition books most often go wrong, because the entries are made once and nobody checks them again until the first tax return.

The limitation: the allocation has tax consequences for both sides, and it is often negotiated in the purchase agreement. The accountant records what was agreed; the negotiation belongs to the deal team.

3. Get Lender Reporting Right the First Time

Most search fund and small business acquisitions carry debt, and the loan documents usually require monthly or quarterly financial statements and covenant calculations. A fractional CFO for search fund acquisition work spends a lot of the first quarter here.

The first report sets expectations. If it is late or has to be restated, the lender remembers.

The limitation: covenant definitions are written by lawyers, not accountants. Read the credit agreement's definitions yourself, because "EBITDA" in your loan may not mean what it means anywhere else.

4. Washington Taxes Follow the Business, Not the Buyer

Washington has historically had no broad personal income tax, which buyers relocating here often lead with, though a tax on income over $1 million has been enacted for 2028 and faces a legal challenge, and a capital gains excise tax already applies. The business pays tax either way. Washington's business and occupation tax is measured on gross receipts, not profit, so a company can owe it in a year it loses money. Seattle levies its own business taxes on top of the state's, including a payroll expense tax for businesses above its thresholds.

There is also a closing-day question. Washington can hold a buyer responsible for a seller's unpaid excise taxes in some business purchases, and the Department of Revenue has a process for confirming what is owed. Raise it before closing.

The limitation: which Washington and Seattle taxes apply, at what rates and classifications, depends on the business's activities and changes with legislation. Confirm with the Department of Revenue and the City of Seattle.

5. Modernize Once the Numbers Are Stable

After the first two or three clean month-end closes, the buyer can start changing things: a better chart of accounts, reporting by service line, a budget the business actually uses. This is where a finance function stops being inherited and starts being yours.

The limitation: every system change costs a month of comparability. Change one thing at a time and keep the old reports running in parallel until the new ones are trusted.

System Six: Seattle, Built for Post-Acquisition Finance

System Six is based in Seattle, was founded in 2009 and has 41 employees. It serves businesses nationwide with revenue between $1 million and $10 million, with bookkeeping and fractional CFO work. The firm was itself acquired by a searcher in 2021, and its profile says it helps organizations modernizing a finance function after an acquisition.

That history is the signal. A firm that went through an acquisition and now works with buyers has seen the first ninety days from the inside.

System Six does not yet have enough verified reviews on Sam's List for a count to be meaningful, so we do not cite one. Judge the firm on its stated specialty, tenure and team size, and ask for references from other acquired companies.

The limitation, plainly: System Six lists a $1 million revenue minimum and pricing from a monthly fixed fee starting at $800, so smaller acquisitions fall outside its range. Scope beyond the core monthly work is a separate conversation, and ask who specifically will own your account in the first ninety days.

Frequently Asked Questions

When should you bring in a fractional CFO for a search fund acquisition?

Ideally before closing, so the fractional CFO can review the seller's books, plan the cutover and help set up the opening balance sheet. At the latest, the first week after closing, before the first payroll and the first lender report.

What is post-acquisition finance?

It is the work of taking over and rebuilding a company's finance function after it changes hands: bank and payroll cutover, the opening balance sheet and purchase price allocation, lender reporting, tax registrations and then modernizing systems. It is heaviest in the first ninety days.

Does a Seattle business owe tax if Washington has no broad income tax?

Usually yes. Washington's business and occupation tax is on gross receipts rather than profit, and Seattle has its own business taxes, including a payroll expense tax above certain thresholds. Confirm what applies to your business with the Department of Revenue and the City of Seattle.

How We Picked These Fractional CFOs in Seattle

You should be able to check our work, so here is exactly how this list was built.

The pool. The pool is the Sam's List partner program: vetted members with a live public profile whose profile lists a Washington base. Sam's List reviews credentials, confirms the firm is actively practicing, and tracks client reviews over time. This is not a survey of every fractional CFO in Seattle, because firms outside the Sam's List directory were never evaluated. It is also not everyone on Sam's List who can help a Seattle business, because the directory lists firms based elsewhere that serve Washington clients nationwide, and those were outside this list by design.

Who is in Washington on Sam's List. Within that pool, the Washington roster is one firm, System Six in Seattle. That is the whole roster rather than a shortlist. Its location was read off the live profile at the time of writing. Partner rosters change, so check the directory for the current picture.

How it is ordered, and who got written up. System Six is written up because it is the partner based in Seattle and its stated focus is the post-acquisition work this article is about. With one firm there is no ordering to explain.

What review counts mean here. Where a firm has enough verified reviews to be worth citing, we cite the number and the date. Where it does not, as here, we say so. A review count measures how many clients wrote something down. It does not measure technical quality.

Paid listings. The firm featured here is a paying Sam's List member. The pool we drew from is Sam's List members, most of whom pay for their listing, so payment is part of why a firm is eligible to appear at all. Sam's List takes no referral fee or commission on any engagement you start.

If you are under letter of intent on a Washington company, line up who owns the finance function before closing day. You can browse fractional CFOs on Sam's List and start with the firm above.

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About the author: Kimberly Green is cofounder of Sam’s List, a directory and matching platform for financial professionals.