Direct Indexing Explained: Is Custom Indexing Worth It for Regular Investors?

An investor with $180,000 in a taxable brokerage account gets a pitch: instead of owning one index fund, software could buy a few hundred stocks in roughly the same proportions, sell losers as they appear, and harvest tax losses all year. The illustration shows a tidy tax saving. What it cannot show on the first page is the fee, the tracking drift, the cash waiting to be invested, or the work of owning a page-long list of positions.

Direct indexing is a strategy, not a special account and not a new kind of index. You own individual stocks that are chosen to resemble an index, rather than owning a fund that owns those stocks for you. That direct ownership is what creates the tax opportunity, and it is also what creates most of the complexity. This article is general education, not investment advice. Whether the strategy is worth it depends mainly on taxes you would otherwise pay, money you will add, and how long you can let the approach run.

The tax engine is loss harvesting, not stock picking

The usual goal is to track a broad market benchmark before taxes while doing better after taxes by realizing losses in individual positions. In an index fund, you own one security. If the fund as a whole is above your purchase price, you cannot reach inside it and sell only the stocks that fell. In a direct indexing portfolio, the manager can sell a stock that is below its purchase price, recognize that capital loss for tax purposes if the rules are met, and buy a different stock intended to keep the portfolio's market exposure broadly similar.

The Internal Revenue Service taxes capital gains and allows capital losses within limits. Under IRS Topic 409, if capital losses exceed capital gains, the excess you can claim against other income in a year is limited to the lesser of $3,000, or $1,500 if married filing separately, or your total net loss. Additional loss can be carried forward to later years. That carryforward matters because a program that harvests a large loss in one year may create a tax asset you use slowly, unless you have gains to offset. A dollar of loss is not a dollar of tax saved. Its value depends on what it offsets and on your tax rates.

For 2026, Revenue Procedure 2025-32 sets the taxable income point where the 0 percent long-term capital gain rate ends at $49,450 for single filers and $98,900 for married couples filing jointly. The 15 percent rate applies up to $545,500 single and $613,700 joint, with 20 percent above those maximum 15 percent amounts. A separate 3.8 percent net investment income tax can apply at higher modified adjusted gross income levels under separate IRS rules. If your gains would have been taxed at 0 percent, harvesting a loss to offset them may save little current federal tax. If gains would be taxed at 15 or 20 percent, or if losses offset short-term gains taxed as ordinary income, the same harvested loss can be worth more.

Short-term and long-term character matters. Gains and losses on assets held one year or less are short-term, while those held for more than one year are long-term, and the netting rules sort them in a defined order on Schedule D. Direct indexing marketing often emphasizes losses harvested during the first years, when many newly purchased stocks sit near their purchase prices and market dips create more chances. Over time, if markets rise, more positions carry gains and fewer fresh losses appear unless you add new money. That fading pattern should be in any honest projection.

The wash sale rule is the fence around the trade

A loss is not allowed merely because a screen shows red. IRS Publication 550 explains the wash sale rule: a loss can be disallowed if you buy substantially identical stock or securities within 30 days before or after the sale. The window is therefore 61 days centered on the sale date. Managers handle this by buying a substitute that is intended to be similar in exposure but not substantially identical, or by waiting. Similar is a tax judgment, not a slogan, and the portfolio can drift from the index while a position sits in a substitute or in cash.

The rule can reach beyond the direct indexing account. Purchases in another taxable account or in an individual retirement account can matter, and Publication 550 warns that a wash sale triggered through an IRA can have harsher basis consequences than one between taxable accounts. Dividend reinvestment, a spouse's account where the rules apply, employer stock purchases, and a target-date fund are all reasons to coordinate before you start. A manager who only sees one account cannot police trades it cannot see. Tell the manager every account where the same or substantially identical securities may be bought, and ask in writing how replacements are chosen.

Recordkeeping is not a clerical detail. With hundreds of positions, each purchase, split, merger, dividend reinvestment, sale, and corporate action can affect basis and holding period. Brokers report much of this on Form 1099-B for covered securities, but the taxpayer remains responsible for a correct return. If you later move the portfolio, ask whether complete lot-level basis will transfer and whether the receiving broker can read it. A strategy that saves tax in year one can give some back in professional preparation fees or errors if the records are a mess in year seven.

Tracking error is the price you pay in market terms

No direct portfolio matches an index exactly. You may start with too little money to buy every stock in useful proportions, fractional share availability may vary, and tax sales deliberately remove some names for at least a month. The result is tracking difference: your return will be a little higher or lower than the benchmark over any period. In a calm market, that gap may be small enough to ignore. In a market led by a narrow group of companies, missing or underweighting a winner can make the gap visible. The strategy asks you to accept an uncertain market gap in exchange for a tax benefit that is also uncertain, though in a different way.

Fees sharpen that trade. A direct indexing service may charge an asset-based fee that is higher than the expense ratio of a broad index fund, and the underlying stocks do not charge a fund expense ratio because there is no fund. Compare the full annual cost on your balance. On an illustrative $180,000 account, a fee difference of 0.30 percentage points is $540 a year before compounding. That is not a quote for any service. It is arithmetic that shows why a projected tax benefit must be compared with a fee you pay in good markets, bad markets, and years when few losses appear.

Cash drag belongs in the same comparison. New deposits, dividends, and proceeds from sales may wait briefly before being reinvested under the manager's rules. A benchmark fund is normally fully invested according to its own process. Ask how much cash the strategy typically holds, how quickly deposits are invested, whether you can set a minimum position size, and what happens when the account falls below a stated minimum. Also ask whether the manager will sell a highly appreciated position for rebalancing if doing so creates a tax bill you did not approve. Tax management that surprises you at year end has failed at communication even if the trades followed an algorithm.

Who has the raw material to benefit

The strongest candidate is usually a taxable investor who regularly adds new money, expects to realize capital gains elsewhere, and is in a tax position where offsets have value. New deposits create fresh lots at current prices, which create future harvesting opportunities. Gains from selling a business, real estate, concentrated stock, or actively managed funds can give harvested losses something valuable to offset. A long horizon helps because unused losses can be carried forward, and because a later low-income year, charitable plan, or estate plan may change how the built-up positions are handled. None of that makes the strategy good by itself. It means the machinery has fuel.

The weaker candidate is an investor whose savings are mostly inside retirement accounts. Losses inside a traditional or Roth IRA are not harvested onto a personal tax return in the same way, because you do not own the tax lots for current capital gain purposes inside the shelter. Buying a direct indexing portfolio inside an IRA generally gives you complexity and fees without the central tax feature. Likewise, a taxable investor in the 0 percent long-term gain bracket with no short-term gains and no expected gains may collect losses she cannot use beyond $3,000 a year against other income. Carryforwards are not worthless, but a benefit delayed for many years is worth less than the same benefit used now.

Charitable intent can change the answer. Appreciated individual stocks can be donated directly, and losses can be harvested separately, which is harder to do with a single fund position that has an overall gain. That flexibility may suit a donor who already gives each year and works with a tax adviser. It also adds decisions about which lots to give and which to keep. If you do not donate appreciated assets, do not count that advantage simply because it appears in a brochure.

Concentrated stock needs special caution. Direct indexing is sometimes sold as a way to transition away from a large employer position by building other stocks around it and harvesting losses to offset gradual sales. That can be a legitimate planning use, but it is different from the standard pitch and it depends on the size of the gain, your risk tolerance, and how quickly concentration must fall. Do not let tax harvesting delay risk reduction for years. A loss offset softens a tax bill. It does not restore a portfolio after a single stock falls.

Unwinding is part of the purchase

Ask how you leave before you enter. If you stop the service, you may keep hundreds of individual stocks. You can continue holding them, sell them gradually, donate appreciated lots, or move them to another manager, but selling everything at once can realize gains that the strategy deferred. The portfolio may also drift further from any index once active tax management stops. A future adviser needs to know whether you want the positions consolidated into funds and over how many tax years. That exit cost is not a reason to refuse the strategy, but it belongs in the first comparison rather than in a resignation letter years later.

Also ask what happens in a divorce, incapacity, or death, and who has authority to pause trading. Tax-managed trading assumes someone is watching for outside gains, IRA contributions, employer plan purchases, and changes in tax residence. If you move to another state, state tax treatment of gains, losses, and carryforwards may differ from federal treatment. Revenue Procedure 2025-32 is a federal source. It does not set your state's rates or loss rules, so a federal tax alpha illustration may overstate or understate the combined result where you live.

A useful trial is to request a holdings-based estimate rather than a generic backtest. Ask the provider to model your actual tax lots, expected deposits, other gains, state, filing status, fee, minimums, cash policy, and the substitute-stock method. Ask what benefit remains if markets rise steadily for three years and harvesting fades. Ask for the assumed value placed on a carried-forward loss and when it is assumed to be used. If the answer depends on using every loss immediately at the highest rate, treat the headline number as advertising rather than analysis.

Direct indexing can be worth it for a regular investor, but regular does not mean average in the brochure's sense. It means a taxable account with recurring deposits, gains to offset, a fee low enough to leave room for benefit, and an owner willing to keep records across accounts. If those pieces are absent, a simple index fund is not a failure of sophistication. It is often the cheaper and cleaner tool.

Start by writing down the tax you would actually save from a harvested loss this year. If that honest number does not clearly exceed the extra fee and complexity, keep the fund and revisit the idea when a large taxable gain is on the horizon.