Benefits of Separately Managed Accounts for High-Income Families

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

The main benefits of a separately managed account (SMA) are that you own each stock directly, so losses can be harvested one position at a time, and the portfolio can be built around what you already hold, such as a large block of employer RSUs. You also avoid the capital gains that other investors’ trading pushes onto you in a mutual fund. Those benefits are real in a large taxable account at a high tax rate, and close to worthless inside a 401(k) or IRA.

So the honest answer to “are separately managed accounts worth it” is: it depends on three numbers. How much sits in your taxable brokerage account, what your combined federal and state rate on capital gains is, and what the SMA costs over a plain index fund. This page works through all three for a California and a Washington family.

What an SMA is, in one paragraph

An SMA is a brokerage account in your name in which a manager buys individual securities for you, usually to track an index or a strategy. A mutual fund or ETF pools everyone’s money into one share price. In an SMA you hold, say, 300 individual stocks, each with its own purchase date and cost. “Direct indexing” is the most common version for families like ours: an SMA designed to behave like a broad index, such as the S&P 500, while trading individual names for tax reasons.

Five benefits that matter for a high-income W-2 family

1. Tax-loss harvesting at the level of each stock

Even in a year when the index is up, dozens of individual stocks are down. An SMA can sell those losers, book the loss, and buy a similar (not identical) stock to keep the portfolio on track. A single index fund only shows a loss when the whole index falls below what you paid. Harvested losses first offset capital gains. If losses exceed gains, up to $3,000 a year ($1,500 married filing separately) can offset ordinary income, and the rest carries forward to later years until it is used up (IRS Topic 409, Publication 550).

2. Building around concentrated employer stock

An Apple engineer with $1.5 million of vested Apple shares, or a Genentech scientist with years of RSUs, does not need more of the same company through an index fund. An SMA can exclude the employer, and often its closest peers, so new money diversifies rather than deepens the bet. Harvested losses elsewhere in the account can then absorb the gains when you sell employer shares in planned tranches.

3. No inherited capital gains distributions

Mutual funds must pass realized gains to shareholders, so you can owe tax on a fund’s trading even in a year you sold nothing. In an SMA, gains are realized only when your own positions are sold. For a family already in the top brackets, avoiding a surprise distribution in December is worth more than it looks.

4. Moving existing holdings in without selling everything

Most managers accept stocks you already own and phase them into the target portfolio over time, selling low-gain positions first. That makes an SMA a practical home for a scattered brokerage account built up over a decade of vests and one-off purchases.

5. Values screens and gifting flexibility

You can exclude industries the family does not want to own. And because each lot is visible, you can give your most appreciated shares held more than one year to charity or a donor-advised fund instead of cash. If you itemize, that typically lets you deduct their fair market value without paying capital gains tax on the appreciation, subject to AGI limits (shares held one year or less are generally deductible only at cost) (IRS Publication 526).

Worked example: one harvest, a California family and a Washington family

Assumptions (illustrative): married filing jointly, $1.6 million of W-2 income including RSUs, $2 million in a taxable direct-indexing SMA. In 2026 they sell $150,000 of long-term gains from older Apple shares to diversify. The SMA harvests $60,000 of losses during the year.

How the rates are set. For 2026, the 20% federal rate applies to joint filers above $613,700 of taxable income, and the 3.8% Net Investment Income Tax applies above $250,000 of modified AGI. California has no lower rate for capital gains, and this family’s taxable income sits in the 12.3% bracket plus the 1% Behavioral Health Services Tax on taxable income over $1 million (2025 schedules; 2026 tables are not yet published). Washington has no wage income tax in 2026, and its 7% capital gains tax only applies above a standard deduction that was $278,000 for 2025, so $150,000 of gains owes nothing there (the 2026 deduction is not yet published). We ignore the federal deduction for state tax, which is effectively capped at $10,000 at this income.

Two caveats keep this honest. First, harvesting is deferral, not forgiveness: the replacement stock has a lower cost basis, so the tax returns when it is sold. It becomes permanent if those shares are donated, or held until death, when heirs generally receive a basis equal to fair market value (IRS Publication 551). Second, the opportunity shrinks. In a rising market, most positions in a five-year-old SMA are above cost, so harvests get smaller unless you keep adding new cash.

The Washington column changes from 2028, when a 9.9% income tax on AGI over $1 million takes effect. How it interacts with the existing capital gains tax is still pending state guidance, so a Seattle family should revisit this math then.

What an SMA costs against an index fund

The comparison is fee versus tax saved, year by year. Illustratively, if an SMA costs 0.35% a year on $2 million ($7,000) and a broad index ETF costs 0.05% ($1,000), the extra $6,000 a year is clearly covered in the California example above. It is less clearly covered in year six, once harvests have faded, or for a Washington family with no state tax on the gains. Ask the manager for the all-in fee, including any platform or adviser fee layered on top, in writing. Fee levels here are assumptions, not market quotes.

When an SMA is the wrong tool

• Most of your money is in a 401(k), IRA or mega backdoor Roth. Losses inside tax-deferred and Roth accounts have no tax use, so a low-cost fund does the same job for less.
• The taxable account is small. Minimums and fees vary by manager. Below the point where the fee is a small fraction of the likely harvest, a single index fund is simpler.
• You plan to spend the money within a few years. Deferred gains come due on sale, so the benefit narrows.
• Nobody coordinates the wash-sale rule. A loss is disallowed if you buy substantially identical stock within 30 days before or after the sale, including purchases in an IRA (IRS Publication 550). If your SMA sells your employer’s stock at a loss while an ESPP purchase or RSU vest lands in the same window, the loss can be lost. Your SMA manager cannot see your other accounts unless someone tells them.

The decision, as a short checklist

1. Taxable brokerage balance, today and expected in five years.
2. Your combined marginal rate on long-term gains (federal plus state).
3. Employer stock you hold or receive each year that the SMA should exclude.
4. Planned large sales or charitable gifts in the next three years.
5. The all-in SMA fee versus your current fund costs.

If items 1 and 2 are large and item 3 is a real concentration, an SMA is usually worth a serious look. If not, an index fund plus occasional manual harvesting may be enough. See how we handle concentration and portfolio risk on our investment risk management page, and how harvesting fits into the full tax picture under tax management.

What to write down for your kids

An SMA has written rules: what is excluded, why the employer stock is being sold down, which values screens apply. That list is already half of a Decision Memo. Add a paragraph on why you chose it and what would make you change course, and your children have something to read in ten years besides a statement. As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.” Our family governance work is built around documenting choices like this one.

Common questions

Are separately managed accounts worth it?

For a family with a large taxable account, a high combined rate on gains and concentrated employer stock, often yes, because harvested losses and the ability to exclude the employer can outweigh the extra fee. For a family whose savings sit mostly in retirement accounts, usually not. Run the fee against a realistic harvest estimate before deciding, and recheck after a few years.

How is an SMA different from a mutual fund or ETF?

In a fund you own shares of a pool, and the fund’s trading decisions, including gain distributions, are shared by all holders. In an SMA you own each security directly, with its own cost basis, so tax decisions are made for your account alone. That direct ownership is what makes stock-level loss harvesting and custom exclusions possible.

Do I pay tax on an SMA if I don’t sell?

You pay tax on dividends each year, and on gains only when positions are sold, by you or by the manager. The manager’s harvesting sales create losses, and its rebalancing can create gains, so ask for a gains budget. Our guide to taxes on a brokerage account when you don’t sell covers the basics.

Next step: pull your last brokerage statement and list your taxable balance, your employer stock and your largest unrealized gains. Those three lines tell you whether an SMA conversation is worth having. This is general education, and the right move depends on the family’s full 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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