By Kevin Luu, Co-Founder and Chief Learning Officer. Reviewed on 2026-09-30.
Establishing a family office means deciding which financial jobs your household needs done (investments, tax, estate documents, insurance, equity compensation, bill pay, the kids’ accounts) and putting one accountable person in charge of coordinating them. A traditional single-family office, with its own entity and salaried staff, is built for families with very large fortunes. For a W-2 household earning $750,000 to $3 million in California or Washington, the practical version is a virtual family office: one coordinator, a small bench of outside specialists, a shared calendar and written records.
This guide covers the three structures, a six-step setup checklist, a worked example for a Bay Area household and a Seattle household, and the mistakes that cost families the most.
Three ways to set up a family office
“Family office” describes a function, not a license. The structure you pick depends on how much complexity you have and how much of it you want to own.
| Structure | What it is | Who it usually fits | What you own and manage |
|---|---|---|---|
| Single-family office | A company owned by the family, with its own employees, serving only that family | Families with fortunes large enough to justify full-time staff, systems and compliance | The entity, payroll, hiring, technology and oversight of every employee |
| Multi-family office | A firm that provides family office services to many unrelated families | Families who want one team to handle most jobs under one roof | The relationship and the decisions; the firm owns the staff |
| Virtual family office | A lead coordinator plus independent specialists (CPA, estate attorney, insurance broker, custodian) working from one shared plan | High-income W-2 families with equity compensation, young children and little spare time | The decisions and the written plan; no entity or employees |
A single-family office that serves only the family (as the rule defines it), is wholly owned by family members or their entities, is exclusively controlled by family members or family entities and does not hold itself out to the public as an investment adviser is excluded from the definition of investment adviser under the SEC’s family office rule. That exclusion is one reason the structure exists, but it does nothing for a household whose real problem is coordination, not regulation. For a closer look at the economics behind the large-fortune model, see what the $50 million minimum is actually about.
What a family office actually does for a $1 million W-2 household
Strip away the staff and the office space and a family office is a list of jobs with an owner and a deadline. For a physician, a biotech scientist or a tech employee with young kids, the list usually looks like this:
- Equity compensation. RSU vest schedules, ESPP purchases, ISO exercises and the withholding gap they create.
- Workplace benefits. For 2026, $24,500 of 401(k) deferrals per spouse, a $72,000 limit on total annual additions per person in each employer’s plan that can open mega backdoor Roth room, and a dependent care FSA of up to $7,500 per household.
- Tax planning. Estimated payments, state residency, and timing of sales and gifts. Our tax management hub covers this in depth.
- Kids’ accounts. 529 plans, custodial accounts and the gift rules behind them.
- Estate documents. Wills, a revocable trust, guardianship for children under 18, beneficiary designations and trusts for minors.
- Risk. Term life and disability coverage sized to the income, plus umbrella liability.
- Household management. A current account list, bill pay, a password vault and instructions a spouse or guardian could follow.
A six-step checklist to set up a family office
1. Map the jobs and who owns each one today
Write one page: every account, every policy, every document, and the name of the person responsible. In most dual-career households, half the rows say “nobody” or “whoever notices first”. That page is your starting point.
2. Choose the coordinator
Someone has to see the whole picture and say “this RSU sale affects the gift you planned in December”. For most W-2 families that is a fee-only fiduciary adviser who does not sell products. Ask in writing how they are paid and whether they act as a fiduciary on every account.
3. Assign the specialists
A CPA who prepares returns with equity compensation every year, an estate attorney licensed in your state, an independent insurance broker and a custodian for the investment accounts. The coordinator should talk to each of them directly, so you are not the messenger.
4. Build an annual calendar
Put the recurring decisions on dates: estimated tax payments, RSU vest dates, benefits open enrollment in the fall, year-end gifts and 529 contributions before December 31, and a document review after any birth, move or job change.
5. Decide what needs an entity, if anything
Most W-2 families need a revocable trust and good beneficiary designations, not a company. A family LLC can make sense later for jointly owned investments or a shared property. If you are weighing one, read how to set up a family LLC for investments before paying for formation.
6. Write it down for the people who come next
The plan should survive a hospital stay, a job change or a death. That means a shared folder with the account map, the calendar, the specialists’ contact details and a short note on why each major decision was made. Our family governance work is built around this step.
Worked example: a Bay Area household earning $1.4 million
Assumptions (illustrative): Married couple filing jointly in California. One spouse is a physician earning $650,000. The other works in biotech with $450,000 of salary and $300,000 of RSUs vesting in 2026. Two children, ages 4 and 8. Household W-2 income: $1.4 million.
| Job | What the coordinator flags for 2026 |
|---|---|
| RSU withholding | If the employer withholds federal tax on the $300,000 vest at the 22% supplemental rate, that is $66,000. Their taxable income sits above the $768,700 start of the 37% joint bracket, so the federal tax on that income is closer to $111,000. The roughly $45,000 gap needs estimated payments or extra withholding. |
| California tax | California taxes the RSU income as ordinary wages, at rates up to 13.3% (2025 schedule), with no lower rate for capital gains when the shares are later sold. SDI at 1.3% applies to all wages with no cap: $3,900 on the vest alone. |
| Retirement plans | Each spouse can defer $24,500 for 2026. If the biotech plan allows after-tax contributions with in-plan conversion, and the employer contributes $12,000 (assumed), the mega backdoor Roth room is $72,000 minus $24,500 minus $12,000, or $35,500. |
| Dependent care | Confirm the employer adopted the $7,500 dependent care FSA limit for 2026. The limit is per household, so if both spouses enroll, their combined elections should stay at or under $7,500. |
| 529 plans | Each parent can give $19,000 per child in 2026 without using lifetime exclusion. With the five-year election, each parent can front-load up to $95,000 per child, reported on Form 709. |
| Estate documents | Name guardians for both children, fund the revocable trust and update beneficiaries after the RSUs start vesting. Federal estate tax is unlikely to apply: the 2026 basic exclusion is $15,000,000 per person. |
None of these items is exotic. The cost comes from nobody owning them. A missed $45,000 withholding gap can show up as a balance due in April, and possibly an underpayment penalty. An unsigned guardianship nomination shows up at the worst possible moment.
How the setup differs in Washington
Take the same family in Seattle with an Amazon or Microsoft income. There is no state tax on wages today, so the RSU vest carries federal tax and payroll tax only. Three Washington rules still belong on the calendar:
- Capital gains tax. 7% on long-term capital gains above the annual standard deduction ($278,000 for 2025, the latest published), and 9.9% on taxable gains over $1,000,000. Selling a concentrated stock position in one year can trigger it.
- Estate tax. Washington’s exclusion is $3,000,000 for deaths from July 1 to December 31, 2026 ($3,076,000 for deaths in the first half of 2026). A house, retirement accounts and investments can pass that number long before the federal $15,000,000 exclusion is in view, so estate documents matter more here than many families expect.
- New income tax from 2028. Washington enacted a 9.9% tax on individuals and joint filers with AGI over $1,000,000, effective January 1, 2028. Details are still being issued by the Department of Revenue, so equity timing decisions for 2027 and 2028 deserve a second look.
Common mistakes when establishing a family office
- Building structure before solving coordination. An LLC or a holding company does not fix a missed estimated payment.
- Letting each specialist work alone. The CPA sees last year, the attorney sees documents, the broker sees policies. Without a coordinator, nobody sees the interactions.
- Paying for the label. Some services marketed as a family office are an investment account with extra reporting. Ask which of the seven jobs above they actually own.
- Ignoring the second earner’s benefits. Mega backdoor Roth and dependent care options often sit unused in one spouse’s plan.
- Keeping the plan in one person’s head. If only one spouse knows where things are, the household has a single point of failure.
What to document for your kids
A family office for a household with children under 12 is not only about this year’s taxes. It is also the place where the reasoning behind decisions gets recorded: why you chose a 529 over a custodial account, why you sold the RSUs instead of holding them, how you decide what to give. As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.”
A simple start is a one-page decision note for each major choice, kept in a FamilyKnowledge® Library alongside the account map. At Age Five Family Office™, this record is part of the setup, not an extra.
Questions families ask about setting up a family office
What is a virtual family office?
A virtual family office is a coordinated team of independent professionals, led by one coordinator, instead of a company with its own employees. The family keeps its existing CPA, attorney and custodian if they are good, and the coordinator connects their work through one plan and one calendar. It suits families who need the function without the overhead.
Do I need to form a company to have a family office?
Usually not. A W-2 household can run a virtual family office with a revocable trust, clear beneficiary designations and good records. An entity such as a family LLC can help later for pooled investments or shared property, but it adds tax filings and legal costs, so it should solve a specific problem first.
How is a family office different from a financial planner?
A planner typically focuses on investments and a long-range plan. A family office coordinates every money job in the household, including tax, estate documents, insurance, equity compensation and household administration, and keeps the specialists working from the same facts. Some planners offer that wider role; ask which jobs they will own in writing.
Your next step
Write the one-page job map from step 1 this week, with an owner next to each row. If more than two rows say “nobody”, that is the signal to set up a coordinator. If you want a second set of eyes on it, the Tax & Wealth Assessment walks through the same map with your actual numbers.
This is general education, and the right move depends on your family’s full picture.
Kevin has advised high-income W-2 tech and biotech families since 2015, and leads the education-first Age Five Family Office from Brea, California.
Connect on LinkedIn → · About KevinThis is part of how we approach Family Governance for high-income W-2 families at Bright Advisers.
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