Direct Indexing
For a $1M+ taxable portfolio in the 32% federal bracket, direct indexing converts a passive index allocation into a tax-loss-harvesting engine that quietly produces $30K–$80K of annual deductible losses without changing the underlying exposure.
The Quick Read
Direct indexing replaces an index fund (like VTI) with a separately managed account (SMA) holding the underlying constituent stocks. A tax-aware manager continually identifies positions trading below cost basis and sells them for tax losses, immediately reinvesting in similar-but-not-identical stocks to maintain the exposure. The harvested losses offset capital gains elsewhere in the household and, up to $3,000 annually, ordinary income. For a $2M taxable portfolio at high brackets, annual harvested losses typically run 1.5–3.0% of asset value — producing $9,500–$19,000 of federal tax savings each year, against an SMA fee differential of 0.20–0.40% over an index fund. The strategy pays for itself many times over for the right household.
- How Direct Indexing Actually Works
- The Tax-Loss Harvest, Visualized
- The Math: When the SMA Fee Pays for Itself
- The Wash Sale Rule and Substitution Stocks
- Pairing With Concentrated Stock Diversification
- Custom Indexing and ESG Tilts
- Implementation Checklist
- Worked Example: A Charlotte Bank Executive's $2.4M SMA
- Frequently Asked Questions
The standard portfolio construction advice for affluent households goes: own broad-market index funds, keep costs low, hold for the long term. The advice is correct as far as it goes. What it misses is that a household holding a $2M S&P 500 index fund and a household holding the same 500 stocks directly in a separately managed account own functionally identical economic exposure — but the tax outcomes diverge dramatically over a decade. The household with the index fund harvests no losses. The household with the SMA harvests losses every quarter, sometimes every month, and uses those losses to offset capital gains and (up to $3,000 annually) ordinary income.
Direct indexing is the structure that captures this difference. For taxable accounts of $1M+ at high marginal rates, it is the most consistent tax alpha available in passive investing.
This piece walks through the mechanics of direct indexing, the math that determines when the SMA fee pays for itself, the wash sale discipline that keeps the strategy compliant, the interaction with concentrated stock positions, and the implementation framework for a $1M–$10M revenue Charlotte business owner or executive evaluating the strategy in 2026.
How Direct Indexing Actually Works
The investor opens a separately managed account at a sponsoring custodian (Schwab, Fidelity, Vanguard) and selects an index to replicate — most commonly the S&P 500, Russell 1000, or a global benchmark. The SMA holds the actual constituent stocks (or a representative subset of 150–300 names that track the index). A tax-aware overlay manager monitors the positions continuously.
When any individual stock in the SMA falls below its cost basis by a meaningful threshold (typically 5–10%, set by the manager's algorithm), the manager sells that position to realize the capital loss. Simultaneously, the manager buys a substitute — a different but economically similar stock from the same sector and factor exposure — to preserve the index-like exposure. After 31 days (the wash sale waiting period), the manager can repurchase the original if it remains the appropriate exposure.
The result: the SMA tracks the chosen index within a tight tolerance (typically 50–150 basis points of tracking error annually), but produces a steady stream of realized capital losses that the investor can use to offset gains.
The Tax-Loss Harvest, Visualized
The strategy operates on a continuous cycle. Each loss harvest produces three outcomes: a realized capital loss on the federal return, a maintained sector and factor exposure through the substitution, and a reset of cost basis on the substitute position that may produce future harvests of its own.
The Math: When the SMA Fee Pays for Itself
Direct indexing SMAs typically charge 0.20–0.40% of assets per year on top of the underlying index exposure cost. For a $2M SMA at 0.30% incremental fee, that is $6,000 of annual cost vs. an index fund. The question is whether the tax savings exceed that cost.
The typical harvest rate, observed across multiple academic studies and SMA provider performance data, is 1.5–3.0% of asset value per year in harvested losses during early years (years 1–3 produce the largest harvests; losses gradually compress as cost basis resets across the portfolio). For a $2M SMA, that is $30,000–$60,000 of annual harvested capital losses.
The federal tax savings on those losses depends on what the household is offsetting. If the household has matching capital gains (from concentrated stock diversification, real estate sales, or other realized gains), losses offset 1-for-1 at the household's long-term capital gains rate — typically 23.8% all-in (20% federal + 3.8% §1411 NIIT) for high-income households. At 23.8%, $40,000 of harvested losses produces $9,520 of federal tax savings.
If the household has no matching gains, up to $3,000 of net losses can offset ordinary income annually (at the household's marginal rate, typically 32–37%), with the remainder carried forward indefinitely. The carryforward retains its tax-savings potential and is realized as the household generates gains in future years.
Net result for a typical $2M Charlotte household: roughly $9,500–$20,000 of federal tax savings annually, against a $6,000 annual fee differential. The ratio is consistently favorable for $1M+ portfolios in high brackets.
The Wash Sale Rule and Substitution Stocks
The wash sale rule under IRC §1091 disallows a capital loss if the taxpayer repurchases "substantially identical" securities within 30 days before or after the loss sale. The 61-day window (30 days before + 30 days after) is the technical period the rule governs.
Compliance with §1091 is what distinguishes a defensible direct indexing strategy from an aggressive one. The substitution stock must not be "substantially identical" to the sold stock. For mainstream direct indexing programs, this is handled by selling, for example, Verizon (VZ) and buying AT&T (T) — same sector, similar exposure, not substantially identical. The IRS has historically interpreted "substantially identical" narrowly — common stock of two different companies has been treated as not substantially identical even when both are in the same industry.
The harder cases involve ETF substitutions for individual stocks (or vice versa) and substitutions across share classes of the same company. Reputable direct indexing managers maintain conservative substitution rules to stay well within §1091's safe ranges. The investor should not be selecting substitutes personally — that's the manager's job, and getting it wrong invalidates the loss.
Pairing With Concentrated Stock Diversification
The single highest-leverage use of direct indexing is in households also holding a concentrated stock position. A Charlotte bank executive with $4M of employer stock and $2M of diversified taxable assets can run direct indexing on the diversified $2M while gradually selling the concentrated $4M position over five to seven years. The harvested losses from the direct indexing portfolio offset the realized gains from the concentrated stock sales — converting the diversification process from a tax-friction event into a substantially tax-neutral one.
This is the framework covered in our Concentrated Stock Positions piece. Direct indexing is one of the five strategies discussed, and for households with $1M+ of diversified taxable assets alongside their concentrated position, it is typically the foundation of the diversification plan.
Custom Indexing and ESG Tilts
Direct indexing also enables customization that's unavailable through index funds. The SMA can exclude specific stocks (a Charlotte household with a personal conflict-of-interest holding can exclude that single stock from the SMA), tilt toward specific factors (value, quality, low volatility), or apply ESG screens. The tracking error increases modestly with each customization layer, but for many households the ability to align the portfolio with personal preferences justifies the slight reduction in benchmark tracking.
Implementation Checklist
Direct Indexing — What to Set Up
[ ] Confirm taxable account size $1M+ at high marginal bracket (32%+)
[ ] Choose SMA sponsor / custodian (Schwab Wealth Advisor, Fidelity, Vanguard, Parametric, Aperio, etc.)
[ ] Confirm fee differential vs. comparable index fund (typically 0.20–0.40%)
[ ] Select target index (S&P 500, Russell 1000, MSCI ACWI, or custom)
[ ] Define harvest thresholds and substitution rules with manager
[ ] Set ESG / factor / exclusion preferences if applicable
[ ] Coordinate with CPA on cost basis tracking and 1099-B reconciliation
[ ] Establish wash sale coordination across ALL household accounts
[ ] Annual review of harvested losses and tracking error
The wash sale coordination point is critical and often missed: §1091 applies across ALL accounts in the household, including IRAs, 401(k)s, and other brokerage accounts — not just the SMA. If the SMA harvests a loss on Microsoft and a separate IRA buys Microsoft within 30 days, the loss is disallowed. Tell the SMA manager about every other account where overlapping holdings might occur.
Worked Example: A Charlotte Bank Executive's $2.4M SMA
"Robert," Charlotte Bank Executive, $2.4M Taxable + $4.2M Concentrated Stock
Robert is a 56-year-old senior executive at a major Charlotte bank with $2.4M in a Schwab brokerage account previously holding VTI (Vanguard Total Stock Market ETF) and $4.2M in concentrated employer stock he's planning to diversify over six years through a 10b5-1 plan. Federal bracket: 35%. NC marginal rate: 4.25%. Combined long-term capital gains rate including §1411: 23.8% federal + 4.25% state = 28.05% all-in.
The 2026 restructure: open a direct indexing SMA (Parametric, S&P 500 with light ESG screen), transfer the $2.4M from VTI to the SMA over 90 days to manage transition tax. Annual fee differential: 0.28% × $2.4M = $6,720.
Year 1 harvest projection:
Harvested capital losses (~2.4% of asset value): $57,600
Offsetting concentrated stock gains realized via 10b5-1: $400,000
Net taxable gain after harvest offset: $342,400
Federal + state tax savings on harvest: $16,160
SMA fee differential vs. ETF: ($6,720)
Net first-year benefit: $9,440
Over five years, with continued 10b5-1 sales of the concentrated position and continued direct indexing harvest, the cumulative net benefit is approximately $58,000 of tax savings net of fee differential. The bank stock position is reduced from $4.2M to ~$1.8M over the period (acceptable concentration), and the diversified SMA continues operating with periodic harvest capacity.
Illustrative composite. Harvest rates vary with market conditions; high-volatility markets produce larger harvests, low-volatility markets smaller. Actual outcomes depend on specific holdings, market path, and household tax profile.
Frequently Asked Questions About Direct Indexing in 2026
What's the minimum portfolio size where direct indexing makes sense?
Most reputable direct indexing programs require $250K–$500K minimums, but the math typically only favors the SMA over an index fund at $1M+ portfolio size and high marginal rates. Below $1M, the fee differential consumes too much of the harvest benefit. Above $5M, the benefit scales meaningfully and the strategy becomes essentially default for tax-aware portfolio construction.
Do harvested losses ever "run out"?
Harvest rates compress over time as the portfolio's cost basis steps down. Year 1 typically produces the largest harvest (1.5–3.0% of asset value); years 5+ may produce 0.5–1.0%. Market drawdowns produce harvest opportunities at any account age. The benefit doesn't disappear but does flatten.
Can direct indexing be done across an IRA or 401(k)?
Mechanically yes, but there's no tax benefit. The advantage of direct indexing is the realized loss showing on the federal return; inside a tax-deferred account, there is no current-year tax consequence. Direct indexing is a taxable-account strategy exclusively.
How does direct indexing interact with charitable giving?
Powerfully. Highly appreciated individual stocks within the SMA can be donated directly to a Donor-Advised Fund — the donor receives a full FMV deduction, pays no capital gains, and the SMA manager rebalances around the donated lots. For households with both significant charitable intent and a direct indexing SMA, the combination is meaningfully more tax-efficient than donating cash or fund shares.
What's the tracking error vs. the index?
Typically 50–150 basis points annually for an unmodified S&P 500 direct indexing account. ESG screens, factor tilts, and other customizations widen the tracking error modestly. For most households, the tracking error is acceptable given the tax benefit, but high-fidelity index tracking (e.g., for a household benchmarked against a specific index for performance reasons) may favor an index fund.
Direct indexing is the kind of strategy that produces consistent, compounding after-tax outperformance without changing the underlying investment thesis. For a $1M+ taxable portfolio in a high bracket, it is one of the cleanest tax-aware portfolio decisions available — and one of the most under-deployed.
If you hold significant taxable assets in broad-market index funds and have not evaluated a direct indexing transition, this is the conversation worth having before the next year of harvests is missed.
About the Author
Gabriel Llewellyn, MBA is the founder of Llewellyn Financial, a fee-only fiduciary RIA in Charlotte, NC serving business owners with $1M–$10M in annual revenue. The firm operates the proprietary Llewellyn Wealth Operating System™, a four-quarter framework for engineering, protecting, and optimizing wealth across tax, estate, capital implementation, and year-end optimization.
This article is for educational purposes only and does not constitute individualized tax, legal, or investment advice. Direct indexing involves tracking error, fee considerations, and wash-sale compliance that depend on the specific provider, account configuration, and household tax profile. Specific results depend on facts and circumstances. Consult a qualified fiduciary advisor regarding your situation. Tax law is current as of the 2026 tax year and may change. Llewellyn Financial is a fee-only, fiduciary RIA based in Charlotte, NC.
