Start here2 reads · 9 min

The few ideas everything else rests on.
  1. What a dollar of gain keeps after tax

    Sell a winner at the top California bracket and 35 cents of every dollar of gain goes to tax. Sell it inside a year and 52 cents go. Where those two numbers come from.

    4 min
  2. Eight tax levers, ranked by what they are worth

    Never selling is worth the whole 35 cents, the one-year line 17, an ETF about 120 basis points a year. Loss harvesting, the lever with the marketing budget, 0 to 30 after year five. Each one, priced.

    5 min

How it works5 reads · 20 min

The mechanics and the numbers behind them.
  1. The lever worth the most is never selling

    A $100,000 position with a $40,000 gain costs $14,040 of tax to sell. Held to the estate it costs nothing; given to charity it earns a deduction. The quiet lever at the top of the ranking.

    3 min
  2. The one-year line is worth 17 cents per dollar

    Everyone knows the line. In 2015 individuals still realized $3.3 billion of stock gains within three months of it, at the short-term rate. Where a known rule gets crossed early, and what it costs.

    5 min
  3. Loss harvesting, in one example

    Sell a stock at a $10,000 loss, buy a similar one the same day, and the loss cuts this year's tax bill by up to $5,210. What actually happened, step by step, and the catch.

    4 min
  4. Why the harvesting benefit fades after a few years

    In AQR's simulation harvesting adds 155 basis points in year one and nothing by year five without new cash. Live accounts show the same curve. Why it fades, and the three things that keep it alive.

    5 min
  5. The wash-sale rule in four facts

    Buy back the same stock within 30 days of selling it at a loss and the loss is disallowed. That part is well known. The four facts that catch households are about spouses, IRAs, brokers, and ETFs.

    3 min

Go deeper2 reads · 6 min

Edge cases, products, and what could change.
  1. Two questions for any tax-savings pitch

    Does the benefit last past year five? Does the long/short version make sense below $5 million? The published evidence says no to both as general claims. How to ask, and what a good answer sounds like.

    3 min
  2. One rule holds up the ETF tax advantage, and Treasury is looking at it

    As of September 2026 nothing pending changes the ranking of the levers. One live item: Treasury has said it is examining the in-kind mechanism behind every ETF's tax edge. A dated watchlist.

    3 min · note
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