Tax-Loss Harvesting at Scale

How systematic harvesting through direct indexing turns routine market volatility into after-tax alpha — and when the math actually works in your favor.

Occasional harvesting vs. systematic harvesting

Every investor can technically harvest tax losses — sell a position that's down, buy something similar, and use the loss to offset gains. Most do it once a year when prompted by their advisor. That's incidental harvesting: opportunistic, manual, limited to the few positions you happen to own.

Direct indexing does something different. Instead of owning a single S&P 500 ETF, you own 200–400 of the underlying stocks. On any given week in a volatile market, dozens of those stocks will be down from their individual purchase prices — even if the index as a whole is flat or up. The platform scans daily and harvests those individual-stock losses continuously throughout the year.¹

The structural advantage: a diversified index generates far more harvestable loss events than the whole index suggests. In 2022, the S&P 500 fell 19%. But within the index, individual stock dispersion was enormous — many names fell 40–60% while others held. Each of those individual drops was a harvest opportunity that a single ETF-holder could not access.

The math at $2M taxable

Assume a $2M taxable account at the 23.8% effective long-term capital gains rate (20% federal LTCG + 3.8% NIIT).²³

• Conservative harvest yield: 0.5%/year ($10,000 in losses harvested). Tax value at 23.8%: $2,380/year in deferred tax.
• Moderate harvest yield: 1.0%/year ($20,000 in losses). Tax value: $4,760/year.
• High-volatility year: 1.5%/year ($30,000 in losses). Tax value: $7,140/year.

Subtract the fee premium over an ETF (typically 0.20–0.30% for platforms like Parametric or Aperio). At $2M, 0.25% = $5,000/year in additional fees. In a moderate harvest year: $4,760 tax benefit − $5,000 extra fee = modest net negative. In a high-volatility year: $7,140 − $5,000 = $2,140 net positive. At $5M, the math scales significantly in your favor.

This is why the break-even question is always: how much harvesting can this account realistically generate? That depends on your portfolio size, the fee tier you can negotiate, and how volatile your period of ownership is.

Use our Direct Indexing Tax Alpha Calculator to run your specific numbers.

Why your ordinary income matters more than your portfolio size

Harvested losses are only valuable if you have gains to offset. Specifically:

• Capital losses first offset capital gains (no limit) — short-term gains taxed up to 37% federal are most valuable to offset.
• After exhausting capital gains, up to $3,000/year can offset ordinary income.⁴
• Remaining unused losses carry forward indefinitely — to future years when gains materialize.

This means systematic TLH is most powerful when you have recurring capital gain events: RSU vesting (which creates ordinary income at vest plus potential LTCG on the shares when sold), consulting or K-1 income, real estate sale gains, or a concentrated-stock diversification program generating realized gains each year.

If you're a $3M retiree living off dividends with no other income, your marginal LTCG rate might be 15% — meaning each $1 of loss harvested saves you $0.15 in tax, and you have few gains to offset anyway. The fee premium may not be worth it. Contrast that with a partner-track professional earning $800K in ordinary income who is also vesting $200K/year in RSUs — the TLH program has constant fuel.

The loss bank: harvesting creates optionality, not just savings

A systematic TLH program accumulates a "loss bank" — a stockpile of carry-forward losses that gives you flexibility in future high-gain years. Think of it as a tax credit balance you can draw on when you need it:

• Selling a concentrated position? Draw from the loss bank.
• Taking a large Roth conversion and want to offset the income impact? No — harvested capital losses don't offset Roth conversion income (which is ordinary income), but they can offset other capital gain events in the same year, freeing up ordinary-income offsets.
• Receiving a large partnership distribution with embedded gain? Draw from the loss bank.

The loss bank's value grows the longer the harvesting program runs — and is most valuable in years when you make large portfolio decisions (selling a business, selling real estate, diversifying concentrated stock).

Wash-sale rule logistics

The wash-sale rule (IRC § 1091) disallows a loss if you purchase the same or "substantially identical" security within 30 days before or after the sale.⁵ This is the primary implementation complexity of TLH.

How institutional platforms handle it:

• When harvesting a loss on, say, Chevron (CVX), the platform buys a substitute like ExxonMobil (XOM) or a diversified energy ETF — similar sector exposure, not substantially identical.
• After 31+ days, the substitute is sold and the original holding is repurchased if desired.
• The platform tracks hundreds of these wash-sale buffers simultaneously across 200–400 positions.
• You cannot replicate this manually — the compliance complexity at scale requires automated systems.

One coordination risk: if you hold individual stocks in another account (say, a brokerage IRA holding XOM), a wash-sale in your taxable account on XOM could be triggered. A specialist advisor coordinates TLH with your full account picture — not just the direct-indexed SMA in isolation.

Concentrated-stock transition: where TLH doubles as a diversification tool

One of the highest-value uses of a direct-indexed account is as a transition vehicle for concentrated-stock diversification. Example:

You own $3M in a single employer stock (low basis, massive embedded gain). You want to diversify but selling triggers a $700K+ LTCG tax bill. A direct-indexed account can generate a loss bank over 2–3 years by harvesting individual S&P 500 stock losses — which you then use to offset concentrated-stock sale gains as you gradually diversify.

This doesn't eliminate the tax liability — it spreads and defers it, often reducing the effective rate by deferring gains to years when your income (and therefore your marginal LTCG bracket) may be lower.

See how the platform selection affects this strategy on our Direct Indexing Platform Comparison.

Where TLH doesn't help

• IRAs and 401(k)s: no taxable gains inside tax-deferred accounts — losses can't be harvested.
• Years with no capital gains: losses still carry forward, so they're not wasted — just deferred value.
• At death: the estate receives a step-up in cost basis. All unrealized gains in a direct-indexed account are eliminated; the accumulated loss bank's deferred-gain benefit also largely disappears. For accounts you expect to hold until death, TLH's value is modest — the step-up gets you there anyway. For accounts you'll draw down in your lifetime, TLH creates real economic benefit.
• Small accounts with high fee ratios: below $500K, the fee premium usually exceeds the expected harvest yield — ETFs win on simplicity and cost.

Sources

1. Kitces — Direct Indexing Tax Alpha Research (Berkin & Luck, Khang/Parametric). Academic studies on 0.5–1.5% annualized TLH alpha.
2. Tax Foundation — 2026 Federal Tax Brackets and Rates. 20% LTCG rate threshold: $533,400 single / $600,050 MFJ for 2026.
3. IRS Topic No. 559 — Net Investment Income Tax (NIIT). 3.8% on investment income; MAGI thresholds $200,000 single / $250,000 MFJ (not inflation-adjusted).
4. IRC § 1211(b) — Capital Loss Limitation. $3,000/year deductible against ordinary income; excess carries forward indefinitely.
5. IRC § 1091 — Wash-Sale Rule. Disallows loss on repurchase within 30-day window.

Tax rates and thresholds verified against 2026 IRS guidance and Tax Foundation analysis as of April 2026. Not tax advice — your specific situation requires a qualified advisor.