Family Office vs Private Equity: What High-Income Families Should Know

By Kevin Luu, Co-Founder and Chief Learning Officer. Reviewed on 2026-09-30.

The difference between a family office and private equity is that a family office is who manages a family’s money, while private equity is one thing that money can be invested in. A family office coordinates investments, taxes, estate documents and reporting for one family (or a small group of families). A private equity fund buys stakes in private companies, locks up investors’ capital for roughly a decade, and charges its own fees on top.

So the real question for a household earning $750,000 to $3 million is not “family office or private equity”. It is whether private equity belongs in your plan at all, how much, and who is checking the fund, the fees and the tax paperwork on your behalf. This guide covers both, with a worked example for a California family and a Washington family.

Family office vs private equity at a glance

A family office can recommend private equity, screen funds and track them. Private equity cannot do anything a family office does. That is why the two are not substitutes.

What “family office” means for a high-income W-2 household

A traditional single-family office is a private company owned by one family, with its own staff. Under the SEC’s family office rule, such an office is not treated as an investment adviser (so it does not register) only if it advises only the family (as the rule defines it, family members plus certain related trusts, entities and key employees), is wholly owned by that group and controlled by family members, and does not hold itself out to the public as an investment adviser (SEC Release IA-3220, Rule 202(a)(11)(G)-1). Paying salaries for a chief investment officer, a tax lead and an operations team only makes sense for very large fortunes.

Most families in our reader’s position are not there yet, but their finances already look like a small family office problem: two W-2 incomes, RSUs and ESPP from Gilead, Genentech, Apple or Amazon, a mega backdoor Roth, 529s, a will that names guardians and a trust for children under 12, and maybe an invitation to invest in a private fund. A family-office-style service such as an Age Five Family Office™ brings those pieces under one fee-only adviser, without the overhead of building an office. For more on how that work is structured, see our investment and risk management service.

The same logic answers a related search, the difference between a family office and wealth management. Wealth management usually means managing an investment portfolio. A family office (or family office style service) covers the portfolio plus tax, estate, insurance, benefits and the family’s own decision-making.

How a private equity fund actually works

When you invest in a private equity fund, you sign a commitment, for example $250,000. The fund does not take it all at once. It sends capital calls over the first several years as it buys companies, then returns money as it sells them, often years later. You must meet every call on short notice, even in a year when markets are down or your RSUs have just dropped.

• Fees. Funds usually charge an annual management fee, often a percentage of committed capital during the investment period, plus carried interest, a share of profits that is often paid only after investors receive a stated minimum return. The terms are in the fund’s private placement memorandum and limited partnership agreement. Read both, because the fee is charged on committed money before most of it is invested.
• Returns reporting. Funds report internal rate of return (IRR), a money-weighted measure that depends on the timing of calls and distributions. It is not directly comparable to the time-weighted returns on your brokerage statement. Our guide to calculating time-weighted return explains what that statement figure measures.
• Tax forms. A fund organized as a partnership sends a Schedule K-1. Partnerships must furnish K-1s by the partnership return due date, which is March 15 for calendar-year partnerships, and later if the partnership extends (IRS Instructions for Form 1065). Many fund K-1s arrive late, so families with fund investments often extend their own Form 1040.

Who is allowed to invest in private equity

Most private funds are open only to accredited investors. An individual qualifies with income over $200,000 (or $300,000 with a spouse or partner) in each of the prior two years and a reasonable expectation of the same this year, or net worth over $1 million excluding the primary residence (SEC, Accredited Investors). Nearly every household in the $750,000 to $3 million range clears the income test.

Some larger funds accept only qualified purchasers, which for an individual means owning at least $5,000,000 in investments (15 U.S.C. 80a-2(a)(51)). Being eligible is not the same as the investment being suitable. The rule tells you who may buy, not who should.

Worked example: a $300,000 fund commitment in California vs Washington

Assumptions, all illustrative: a married couple filing jointly with two children ages 4 and 7. One works at a biotech company, one is a physician. Combined W-2 income is $1.2 million. They hold $3.5 million in investments outside their home, including $1.1 million of employer stock from vested RSUs. A colleague offers a spot in a buyout fund with a $300,000 minimum commitment and a hypothetical 2% annual management fee on commitments.

1. Size. $300,000 is about 8.6% of their $3.5 million. But $1.1 million (about 31%) is already in one stock. Adding a locked-up position on top of a concentrated one leaves less of the portfolio that can be sold quickly.
2. Cash flow. If the fund calls $75,000 a year for four years (hypothetical pacing), that cash has to come from salary, RSU sales or the brokerage account. Those calls compete with 529 contributions, a mega backdoor Roth and any home upgrade.
3. Fees before results. At a hypothetical 2% on $300,000, the management fee is $6,000 a year. Over a five-year investment period that is $30,000 paid before the fund has sold anything.
4. Tax on a gain. Suppose in year eight the fund distributes $150,000 of long-term capital gain. For 2026, federal long-term gains above $613,700 of taxable income (married filing jointly) are taxed at 20%, plus the 3.8% Net Investment Income Tax above $250,000 of MAGI. At their income that is 23.8%, or $35,700.

In California, there is no lower rate for capital gains, so the gain is taxed as ordinary income. Using 2025 rates (2026 schedules were not yet published when this was reviewed), a couple with taxable income around $1.2 million sits in the 11.3% bracket plus the 1% Behavioral Health Services Tax on taxable income over $1 million, or 12.3% at the margin. That adds about $18,450, for a total of roughly $54,150 on the $150,000 gain.

In Washington, there is no wage income tax in 2026, and the 7% capital gains tax applies only to long-term gains above the annual standard deduction ($278,000 for 2025, the latest published figure). If this $150,000 were their only qualifying gain that year, the Washington tax would be zero. A large exit in the same year as a big stock sale could push them over the threshold. Washington has also enacted a 9.9% income tax on AGI over $1 million starting in 2028, so families planning distributions years out should not assume today’s rules will hold.

The point of the example is not that private equity is good or bad. It is that a $300,000 “yes” commits the family to four years of calls, $30,000 of fees before results and a tax bill that depends heavily on which state they live in.

How to evaluate a family office or adviser on private equity

If you already work with an adviser, or are interviewing one, these questions show whether they can handle private markets responsibly:

• How are you paid when I invest in a fund? A fee-only adviser should be paid the same whether you invest or not. Placement fees, revenue sharing or a fee on top of the fund’s own fees are worth knowing about in writing. Our guide on how much to pay in investment fees walks through the layers.
• What is my total private allocation, and why? A good answer ties the number to your liquidity needs, RSU concentration and time horizon, not to what the fund minimum happens to be.
• How do you pace commitments? Ask for a projection of calls and distributions by year, so you can see the cash you need.
• Who reviews the documents? Someone should read the limited partnership agreement for fees, key-person terms and transfer restrictions before you sign.
• How will you report it? Private funds should appear in the same report as your public accounts, with IRR and multiples explained in plain language.
• Who handles the K-1s? Late K-1s and multi-state filings are routine with funds. Your CPA and adviser should plan for them each February.

For context on how private funds fit next to public investments, see family office asset allocation and our explainer on venture capital management fees, which work much like private equity fees.

Common mistakes high-earning families make with private equity

• Saying yes because of who asked. Deals passed between colleagues or physicians often skip the review a stranger’s pitch would get.
• Ignoring the stock you already own. Employer RSUs and options are already a large, single bet. Private equity adds illiquidity on top.
• Counting committed capital as spent. Uncalled commitments are a liability. Keep enough liquid money to meet them in a bad year.
• Comparing IRR to an index return. The two measure different things, so a high IRR does not automatically mean the fund beat the stock market.
• Forgetting state tax. At these income levels, a California resident typically keeps less of a private equity gain than a Washington resident with the same deal.

What to write down for your children

A private fund can outlast a decade of your children’s childhood. If something happens to you, a spouse, trustee or grown child may have to meet capital calls they never knew about. Write a one-page Decision Memo for each fund: why you invested, how much you committed, the expected call schedule, where the documents live and who to call. Store it with your estate documents in your family governance files.

That memo is also a teaching tool. As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.” A record of why you said yes, or no, to a private deal is exactly that process, written down.

Frequently asked questions

Do family offices invest in private equity?

Many do. Large single-family offices often invest directly in private companies or commit to funds as part of a long-term allocation. For a high-income W-2 family, a family-office-style adviser can screen funds, size a commitment against liquidity needs and coordinate the K-1s, but it should start by asking whether private equity is needed at all given the equity compensation the family already holds.

What is the difference between a family office and a hedge fund?

A hedge fund, like a private equity fund, is an investment vehicle that pools money from many investors and charges management and performance fees. A family office works for one family and decides whether to use such funds. Hedge funds usually allow periodic withdrawals; private equity funds generally do not. Neither replaces the tax, estate and planning work a family office does.

Is “private equity family office” a real category?

The phrase usually describes a family office that puts a large share of its assets into private companies, sometimes buying businesses outright. It is a family office with a private equity style of investing, not a different legal structure. For most W-2 households, the relevant question is simply how much of the portfolio should be locked up in private funds.

Next step

Before you sign a fund commitment, list every illiquid holding you already have (unvested RSUs, employer stock, real estate, existing funds) and the cash you will need over the next five years. If the new commitment still fits, you have a basis for saying yes. If you want a second set of eyes on that list, our Tax & Wealth Assessment covers it.

This article is general education, not individual advice. The right move depends on your family’s full financial picture.

Written by

Kevin Luu

Co-Founder and Chief Learning Officer, Bright Advisers

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.

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