How to Invest $6 Million

What's different at $6 million vs $5 million

The $5M milestone gets attention because of the qualified purchaser threshold. At $6M, that access is established. The planning conversation shifts to how you deploy it — and to a set of concerns that become unavoidable at this wealth level:

1. State estate taxes are a six-figure problem. The federal estate and gift tax exemption is permanently $15 million per person under the OBBBA.¹ But a dozen states and DC levy their own estate taxes — with exemptions far below $15M. At $6M, residents of Oregon ($1M exemption), Massachusetts ($2M exemption), Washington ($3.1M exemption), or Minnesota ($3M exemption) face state estate taxes of $300,000–$550,000 or more on a single death. This is not a theoretical problem you address at $10M. It requires action now — credit shelter trust structures, domicile review, and coordinating with your estate attorney.

2. The fee math hits $60,000 a year. A 1% AUM fee on $6M is $60,000 annually — more than many families earn in salary. Over 25 years at 7% gross return, that 1% fee drag reduces your ending portfolio by approximately $2.7 million compared to a flat-fee fiduciary advisor charging $12,000–$20,000/year. That is not a rounding error.

3. Roth conversion urgency is highest in the decade before RMDs. A $3.5M traditional IRA today, growing at 6% for 10 years, reaches $6.3M by age 75 and generates a first required minimum distribution of approximately $230,000 (ULT divisor 27.4).⁴ Combined with Social Security and other income, total income exceeds $350,000+ — triggering IRMAA surcharges of $12,000–$18,000/year for a couple on top of ordinary income tax. Converting $100,000–$200,000/year during the 62–73 window at 22–24% is almost always the better path.

4. Direct indexing supports 4+ independent sleeves at $6M. With $2M–$3M in taxable accounts (typical at $6M total), you can run four independent direct-index sleeves (US large-cap, US small-cap, international developed, sector tilt) simultaneously. Each sleeve harvests losses from a distinct set of individual positions. The incremental after-tax alpha over a single ETF position is typically 0.3%–0.6%/year, compounding to $18,000–$36,000 annually on a $6M portfolio — exceeding most management fees for the service.

Asset allocation at $6 million

The meaningful difference from the $5M tier: at $6M, institutional alternatives deployment is less about gaining access and more about sizing and sequencing. A typical QP investor at $6M might have $600K–$900K committed to PE or private credit, some of it still in the J-curve (years 1–3, net-negative returns while capital deploys). Understanding the capital call schedule — how much cash is needed and when — drives the liquidity budget for the rest of the portfolio.

State estate tax exposure at $6M

This is the planning issue most commonly missed at $6M. With a permanent federal exemption of $15M/person, many households assume estate tax is irrelevant until wealth reaches eight figures. For residents of these states, that assumption is wrong:

Three planning moves can significantly reduce or eliminate this exposure:

• Credit shelter (bypass) trust at the first death. For married couples in OR, MA, or MN, leaving assets to a credit shelter trust at the first death preserves both spouses' exemptions. Without this, everything passes to the surviving spouse, who then faces only one state exemption at death.
• Domicile change to a no-estate-tax state. Florida, Texas, Nevada, and others have no estate tax. A domicile change — real, documented, not just a PO box — combined with cutting ties to the original state (surrendering driver's license, re-registering vehicles, changing voter registration) eliminates state estate tax entirely. CA/NY also have no estate tax, but have the highest income taxes; OR, MA, and WA residents often consider FL or NV.
• GRAT and irrevocable trust structures. See the trust strategies guide for how GRATs can shift appreciation above the §7520 rate (5.0% for June 2026)⁵ to heirs without gift tax. At $6M, a zeroed-out 2-year GRAT funded with an asset expected to return 9–12% transfers several hundred thousand dollars in appreciation tax-free per cycle.

The fee math at $6 million

The AUM structure also creates a compounding conflict of interest at $6M. An advisor earning $60,000/year on your portfolio is not incentivized to recommend a Roth conversion that temporarily reduces your account balance (and their fee). Flat-fee advisors have no such incentive conflict — their interest is to optimize your after-tax outcome, not the value of the accounts they bill on.

Roth conversion planning at $6M

This is typically the highest-leverage tax decision for a $6M household with significant tax-deferred balances. The math:

Assume $3.5M in traditional IRAs and 401(k)s today at age 62, growing at 6%/year to RMD age. At 73 (born 1951–1959 per SECURE 2.0), the account reaches $7.0M and the first RMD is approximately $7.0M ÷ 26.5 = $264,000.⁴ At 75 (born 1960+), it reaches $7.9M and the first RMD is $7.9M ÷ 27.4 = $288,000. Combined with Social Security ($4,152–$5,181/month FRA to age-70 benefit) and any other income, total taxable income exceeds $350,000 — pushing you into the 35% bracket and IRMAA Tier 3 or above, adding $10,000–$16,000 per year in Medicare surcharges per couple.

Converting $150,000–$200,000/year during ages 62–72 at 22–24% marginal rates converts roughly $1.5M–$2M of the deferred balance before RMDs begin. The remaining IRA balance is smaller, the RMDs are manageable, and the converted Roth balance grows tax-free with no RMDs. The Roth conversion window — the gap between retirement and age 73/75 — is one of the most valuable planning windows for a $6M household.

See our Roth conversion strategy guide and calculator for the year-by-year math on your specific situation. The IRMAA planning guide has the 2026 bracket table and surcharge amounts.

Direct indexing at 4 sleeves

At $6M total portfolio with $2M–$3M in taxable accounts, the case for direct indexing — owning individual stocks in an index rather than ETFs — is overwhelming. Four independent sleeves at $500K–$750K each cover:

• US large-cap (S&P 500 equivalent) — 500 positions, constant individual-position harvesting opportunities even in bull markets
• US small-cap (Russell 2000 equivalent) — higher turnover and volatility than large-cap creates more frequent harvesting opportunities
• International developed (MSCI EAFE equivalent) — currency-driven volatility adds a third independent loss-harvesting dimension
• Factor tilt (value, quality, or low-volatility) — tracks differently from market-cap-weighted, creating harvesting when the factor underperforms

With four sleeves tracking different indexes, some portion of the portfolio is almost always experiencing individual stock losses even in a rising market. Estimated incremental after-tax alpha: 0.3%–0.6%/year at this scale, or $18,000–$36,000 annually — typically exceeding the direct indexing management fee of 0.15%–0.30%/sleeve. Major providers at this asset level: Parametric (Nuveen), Aperio (BlackRock), Vanguard Personalized Indexing.

Alternatives deployment at $6M

With QP status established, the question is no longer access but sizing. At $6M, a typical 15–20% alternatives allocation is $900K–$1.2M. Sequencing considerations:

• Don't commit it all in one vintage year. PE returns are vintage-year dependent. Spreading commitments across 3–5 years smooths J-curve effects and diversifies across economic cycles. $200K–$300K per commitment, across 3–4 funds, over 3 years is a common structure.
• Co-investment rights reduce effective fee load. Many institutional PE managers offer co-investment opportunities alongside their fund — these are often fee-free or carry-free. If your advisor is allocating $500K+ to a single GP, ask what co-investment access comes with it.
• Private credit offers yield with shorter duration than PE. Institutional direct lending funds at QP access tier target 8%–11% yields with 3–5 year duration (vs 7–10 year PE lock-up). For a $6M investor who wants illiquidity premium without the full PE J-curve, private credit is often the better first allocation.
• Infrastructure and real assets hedge inflation. CPI-linked cash flows from midstream energy, utilities, and infrastructure funds provide a portfolio-level inflation hedge that bonds don't. At 5–7% of the total portfolio, real assets add a return stream that's largely uncorrelated with equity.

Tax planning priorities at $6M

Capital gains and NIIT. At $6M portfolio, long-term capital gains are taxed at 15% or 20% depending on taxable income, plus the 3.8% NIIT on investment income above $250,000 MAGI (MFJ).⁶ The combined 23.8% rate on gains above $613,700 MFJ makes year-level gain timing — clustering large gains into years with offsetting losses, installment sales on business assets, DAF donations of appreciated stock — material at this scale.

Asset location optimization. At $6M with meaningful balances across taxable, tax-deferred, and Roth accounts, proper asset location is worth 0.2%–0.5%/year: $12,000–$30,000 annually at this portfolio size. Bonds and REITs in tax-deferred or Roth; direct-indexed equities in taxable where unrealized gains can be managed; municipal bonds only in taxable (exempt status wasted in tax-deferred). See our asset location guide for the full framework.

SALT cap and state income tax. For high earners in CA, NY, or NJ, the 2026 SALT deduction cap of $40,400 (MFJ, phasing out above $505,000 MAGI per OBBBA)¹ combined with state income tax rates of 9–13% make domicile analysis worth a careful look. A retired $6M household with $200K in investment income pays $20,000–$26,000/year in state income tax in a high-tax state — and $0 in FL/TX/NV. That's a real number.

Common mistakes at $6 million

1. Ignoring state estate taxes because the federal exemption is $15M. For OR, MA, WA, and MN residents, a $6M estate triggers $300,000–$550,000 in state estate tax at the first death. A credit shelter trust and a conversation with an estate attorney costs far less than that.
2. Deferring Roth conversions because "the tax seems high now." A 22–24% conversion rate now is definitively lower than the 32–35% rate you'll pay on forced RMDs at $7M–$10M IRA balance. The math almost always favors converting now.
3. Running one direct index sleeve on a $2M+ taxable account. Multi-sleeve direct indexing at $500K–$750K per sleeve captures independent losses from multiple asset classes. One sleeve harvests one market's losses; four sleeves harvest four.
4. Paying 1% AUM on $6M as a comfort purchase. $60,000 a year for investment oversight is defensible only if the advisor is delivering active alpha — which almost none do persistently above fees. A flat-fee fiduciary for $15,000–$20,000 provides more objective advice and eliminates the AUM incentive conflict.
5. Sizing illiquid alternatives without modeling capital calls. A $1M PE commitment may require $250K in called capital in year 1 and more in years 2–3, during which the J-curve is negative. Model the capital call schedule against your liquidity budget. Running out of liquid assets during a PE drawdown period forces selling at the wrong time.
6. Not coordinating the Roth conversion plan with IRMAA lookback. IRMAA uses income from 2 years prior. A large Roth conversion in 2026 shows up in 2028 Medicare premiums. This doesn't mean don't convert — it means build the conversion plan with IRMAA as one of the inputs, not an afterthought.

Get matched with a fee-only advisor who works with $6M portfolios

The decisions that matter most at $6M — state estate tax mitigation, Roth conversion sequencing, multi-sleeve direct indexing, QP alternatives deployment, fee structure rationalization — require an advisor who handles this wealth level regularly. We match you with fiduciary, fee-only advisors who specialize in the $2M–$20M range and charge flat retainers, not 1% AUM.

Fee-only · No commissions · Free match · No obligation