Direct Indexing Explained: Tax-Loss Harvesting at Scale

For most of the last 30 years, the cheapest and simplest way to own the stock market was a broad index fund or ETF. That is still true for most investors. But for a high earner with a large taxable account, a different structure has moved from institutional-only to widely available: direct indexing. Instead of buying a fund that owns 500 stocks, you own the 500 stocks yourself, in an account managed to track the index.

Why bother? Because owning the pieces rather than the package opens up tax-loss harvesting on every individual holding, the ability to exclude companies you do not want, and a way to diversify out of concentrated stock without a single large gain. Falling trading costs and fractional shares have made it practical at account sizes that were unthinkable a decade ago.

This guide explains what direct indexing is, how the tax mechanics work, what it costs, and who it fits. It is educational, not individualized advice.

What Direct Indexing Is

A direct indexing account is a separately managed account (SMA) that holds a sample of the stocks in a chosen index, weighted to match the index closely. A manager, usually a software platform run by a custodian or asset manager, buys and sells positions to keep tracking error low, harvests losses when they appear, and replaces sold positions with similar stocks to maintain exposure.

You see hundreds of individual holdings rather than one fund ticker, and you receive a 1099 that reflects every sale. The account tracks the index, generally within a fraction of a percent per year, but it is a personalized version of it.

The concept is decades old. Institutions and wealthy families have used custom index portfolios since the 1990s. What changed is cost. Zero-commission trading, fractional shares, and automated harvesting software brought minimums down from millions to, at some providers, a few thousand dollars.

Direct Indexing vs an Index ETF

An index ETF pools your money with other investors and hands you a share of a single portfolio. You only realize a gain when you sell the ETF itself. That is tax-efficient, but the losses on individual stocks inside the fund are invisible to you. A direct indexing account makes those losses yours to use. The trade-off is complexity: an ETF is one line on a statement, while a direct indexing account is 300 to 500 lines, hundreds of tax lots, and a long 1099.

How Tax-Loss Harvesting at Scale Works

Tax-loss harvesting means selling an investment that has dropped below its cost basis, realizing the loss for tax purposes, and buying a similar but not substantially identical investment so your market exposure does not change. Realized losses offset realized capital gains dollar for dollar, and up to $3,000 of net loss per year can offset ordinary income, with the remainder carried forward. The IRS explains these rules at irs.gov.

With a single index fund, you can only harvest when the whole fund is down, which happens in bear markets and rarely otherwise. With direct indexing, the manager can harvest at the stock level. In a typical year when the index gains 10 percent, a large fraction of individual stocks still finish down, and many more dip below their purchase price at some point. Each dip is a harvesting opportunity. The software sells the loser, books the loss, buys a correlated replacement, and swaps back after the 30-day wash sale window if appropriate.

What the Losses Are Worth

Harvested losses are only valuable if you have gains to offset. Common sources for high earners include RSU shares vesting and sold, the sale of a business or real estate, gains from rebalancing a large taxable account, and capital gain distributions from other funds. A loss carryforward can also sit on your return for years waiting for a future gain.

Published estimates suggest that systematic stock-level harvesting can add roughly 1 to 2 percent per year in after-tax value in the early years for an investor in a high bracket with gains to offset, declining over time. Your number depends on market volatility, your bracket, and how much gain you actually have to shelter. If you have no gains, the benefit is limited to the $3,000 ordinary income offset and the carryforward.

The Benefit Fades Over Time

This is the part sales presentations tend to skip. Harvesting works because positions trade below their cost basis. As markets rise, more of the portfolio sits well above its basis, and there is less to harvest. Studies show harvesting yield is highest in years one through five and drops substantially after a decade in a portfolio with no new money.

Two things extend the runway. Regular new contributions create fresh tax lots at current prices. And volatile markets, even flat ones, create dips that seasoned portfolios can still capture. A direct indexing account funded once and never added to will eventually look a lot like a low-basis index fund.

Other Uses Beyond Harvesting

Tax-loss harvesting gets the headlines, but direct indexing solves a few other problems that a fund cannot.

• Diversifying concentrated stock. An executive with a large position in one company can build the index around that stock, excluding it and its closest peers, then use harvested losses to offset gains from gradually selling the concentrated shares. Our guide to concentrated stock strategies covers the broader toolkit.
• Excluding companies or sectors. A physician employed by a hospital system may want to exclude healthcare employers. Others exclude industries for values reasons. A direct index can leave out what you choose while tracking closely.
• Charitable giving with appreciated lots. Because you own individual shares, you can donate the highest-gain lots to a donor-advised fund each year and let the manager rebuy the exposure. This pairs harvesting losses with gifting gains.
• Transitioning a legacy portfolio. An inherited or long-held basket of individual stocks can move into a direct index framework rather than being sold at once, letting the manager work down concentrated positions over years.

What Direct Indexing Costs

Fees have dropped substantially. A decade ago, custom index SMAs commonly charged 0.5 to 1 percent of assets. Today, many platforms charge 0.2 to 0.4 percent, and some large custodians offer basic versions below that. A broad market ETF costs about 0.03 percent, and that fee gap is the first thing the tax benefit has to overcome.

There are less visible costs too.

• Tracking error. Harvesting and exclusions mean the portfolio will not match the index exactly. A well-run account stays within a fraction of a percent.
• Trading spreads. Hundreds of small trades cost something even at zero commission.
• Complexity at tax time. A long 1099-B with hundreds of transactions is normal.
• Lock-in. After several years, the account holds many low-basis positions. Moving to a different provider or back to an ETF means realizing gains.
• Advisor fees. If an advisor manages the account, their fee applies on top of the platform fee. Ask for the all-in number.

Who Direct Indexing Makes Sense For

The structure is powerful in the right situation and unnecessary in the wrong one.

Good Candidates

• A taxable account large enough that the harvesting benefit outweighs the fee, often several hundred thousand dollars or more, though minimums vary
• A high federal and state bracket, where every dollar of offset gain saves the most tax
• Regular or anticipated capital gains from equity compensation, a business sale, real estate, or a concentrated position
• Ongoing contributions that keep creating fresh lots
• A specific need to exclude an employer, sector, or set of companies
• A long time horizon and no plan to unwind the account in the near future

Poor Candidates

• Investors whose savings are mostly in 401(k)s and IRAs, where losses have no tax value
• Those with no realized gains to offset and no expectation of them
• Anyone who values a simple one-fund statement and a short tax return
• Investors in low brackets, or retirees whose long-term gains fall in the 0 percent capital gains bracket
• Portfolios small enough that the fee overwhelms the benefit

Questions to Ask a Direct Indexing Provider

If you are evaluating an offering, these questions separate a well-built program from a marketing product.

• Which index does the account track, and how many holdings does it use to sample it?
• What is the historical tracking error, net of harvesting and exclusions?
• How often does the software scan for harvesting opportunities?
• How are wash sales monitored across my other accounts, including my spouse's and my IRAs?
• What is the all-in fee including platform, trading, and advisory layers?
• What happens if I want to leave, and can positions transfer in kind?

Wash Sales Across Accounts

The wash sale rule applies across all accounts you and your spouse control, including IRAs. If the manager sells a stock at a loss and you or your spouse buy it in another account within 30 days, the loss is disallowed. Most platforms only see the accounts they manage. Tell your provider about outside holdings, and be especially careful with employee stock purchase plans and RSU vesting, which can trigger inadvertent wash sales on your own company's shares. FINRA has a plain-language overview at finra.org.

How Direct Indexing Fits in a Broader Plan

Direct indexing is a tool for the taxable slice of a portfolio, not a replacement for the whole thing. Retirement accounts should still hold low-cost index funds, since harvesting inside them accomplishes nothing. The taxable direct index account should hold the asset classes that belong in taxable under a sound asset location framework, usually broad US and international stocks, while bonds stay in tax-deferred accounts.

The strategy also works best when coordinated with the rest of your tax picture. Harvested losses are most valuable in years when you realize large gains, so the timing of a business sale, an option exercise, or a concentrated stock sell-down should be planned alongside the harvesting program. That coordination is where tax planning and investment management meet. The SEC's investor education site has background on managed accounts at investor.gov.

Direct indexing is index investing with the pieces exposed, which gives a tax-aware manager more to work with. For an investor with a large taxable account, a high bracket, and real gains to offset, that flexibility can be worth meaningfully more than the fee. For everyone else, a broad ETF remains the simpler and often better choice. If you are unsure which side of that line you fall on, contact us and we can run the numbers on your actual accounts.

Tony Colunga · Founder, Attend Wealth

Tony leads Attend Wealth, a fee-based wealth management firm in Atlanta serving professionals, families, physicians, and business owners. Advisory services are held to a fiduciary standard. More about Attend