Tax Diagnostic

One place coordination becomes measurable.

Taxes are the most measurable expression of coordination, the same discipline behind your estate planning, withdrawal strategy, liquidity, and how your advisors work together. Here it shows on identical holdings: a concentrated, high-turnover portfolio gives up return to tax every year; coordinated as one system, the same holdings keep far more. A tax-efficiency result, not a claim about pre-tax returns.

modeled after-tax improvement / year

How to read thisThe state & federal rates come from current tax code; the coordination figure is an illustrative model of what disciplined tax management has recovered over time, a diagnostic, not a forecast, and not a robo-advisor's black box.

Before the numbers

This isn't a test of what you know. It's a read on where a financial life has quietly stopped talking to itself — the gaps most households only notice after they've become expensive. Set your state and portfolio above; the figure that appears is the coordination you may already be leaving on the table, named before any recommendation.

Read it honestlyThe +3.7–4.7%/yr shown above for the four representative jurisdictions (Federal, Illinois, New York, California) is what disciplined, tax-managed coordination recovers versus a concentrated, tax-naive book (left); the full range across every jurisdiction we model runs +3.3–4.8%/yr, and your own figure appears above once you've told us your state. Measured against an ordinary broadly-diversified index (center), the defensible edge of coordination is smaller — on the order of ~0.6–1.5%/yr, consistent with published tax-alpha research. We show all three so the number is never taken out of context.

How coordination changes the outcome
USD per $1,000,000 · one year · modeled

Where a gross return goes

Line
Position
USD
Gross return
8.0% on $1,000,000, before anything
80,000
Taxes
Dividends, interest, realized gains, top brackets
(21,000)
Fees
Advisory at 20 bps + fund expenses at cost
(2,000)
Inflation
2.5% CPI assumption on the base
(25,000)
After-tax real return
What compounding actually gets
32,000

Coordination works the tax line, placement, lot selection, and harvesting; the gross return and inflation are not ours to promise. Modeled, illustrative, not a forecast or advice.

PurposeDecompose one year of gross return into what survives taxes, fees, and inflation. MethodStatic decomposition at the stated rates, in accounting convention. Inputs8.0% gross · top marginal brackets · 20 bps advisory + fund costs · 2.5% CPI. SourceDriftwood After-Tax Lab, modeled, hypothetical, illustrative. As ofJuly 2026 · v1.0 · reviewed quarterly
The higher the tax, the more there is to keep, after-tax growth by state, per year
Tax environmentUncoordinated*CoordinatedRecovered vs naive

Footnote*Uncoordinated = a concentrated, tax-naive book (the uncoordinated extreme). A broadly-diversified index sits between these two columns; the defensible coordination edge versus that index is ~0.6–1.5%/yr (see the cards above). State rows show after-tax CAGR %/yr.

See it deliveredA completed review becomes a household's own standing operating record: see The Record →

A note from the founder

This diagnostic is deliberately conservative, it counts only what disciplined portfolio tax management recovers, and stops there. In a short call I'd walk your actual holdings, your state's specific rules, and the estate, gifting, and residency coordination this figure leaves at zero, where the larger opportunities usually sit.

Alec Messino, Founder · Driftwood Wealth
See it on your own portfolio.
The full After-Tax Lab localizes this to your state and bracket, then, privately, computes what coordination keeps on your actual holdings.