Portfolio Churning Costs $30,000 to $60,000 a Year on $3M

Movement, at scale

The 1 Question That Explains Why Your Adviser Moves Your Money introduced what excessive trading costs. This chapter runs the same numbers at high-wealth scale, where a percentage turns into sums nobody would ever pay if they arrived as a bill.

Heavy trading bleeds 1–2% a year in dealing costs, the spread between buying and selling prices, and tax (The 1 Question That Explains Why Your Adviser Moves Your Money's verified range). On $3 million that's $30,000 to $60,000 a year — a second invisible management fee, paid for activity that the evidence says makes things worse rather than better. The households that traded most did worst, by percentage points that at this size mean six figures a decade.¹

Why portfolios move too much

Because of how people get paid. (The 1 Question That Explains Why Your Adviser Moves Your Money) Anyone paid per transaction makes money from movement directly. Anyone paid a percentage benefits from it indirectly — activity looks like the fee earning its keep, and repositioning every quarter is a performance you can watch.

Because of how people are built. (Volume 2) There's a deep instinct that doing something beats doing nothing, and investing is one of the few places where that instinct is exactly backwards. Add Stories Beat Statistics: the 3 questions to ask any narrative's stories — every market moment arrives already narrated, with a trade implied — and, at this level, the flattery of complexity: the suggestion that serious money needs serious activity, when 85–95% of Active US Equity Funds Trailed Their Index: fees, evidence and humility says the opposite.

Because tax makes it worse the richer you are. In a taxable account at this size, every reshuffle crystallizes gains at the top rates (Tax Drag on Investments: placement, turnover and harvesting basics's drag, at its maximum). The largest portfolio pays the most for every piece of pointless movement.

The audit

Once a year, ask three plain questions. How much of the portfolio was bought and sold? What did that cost, counting both dealing costs and the tax on gains taken — both of which can be worked out. And what specific, written-down reason justified each significant move?

The list of good reasons is short: rebalancing back to your target when it drifts past a set band, selling losers for the tax benefit within the rules, and genuine changes in your circumstances. "The market environment" is narration, not a reason (Stories Beat Statistics: the 3 questions to ask any narrative).

A portfolio that can't justify its own movement is paying a tax on activity for someone else's benefit — the manager's demonstration that they're working, the fee structure's appetite for transactions, or your own discomfort with sitting still.

The takeaway

At this scale, unnecessary movement is a second management fee — $30,000 to $60,000 a year on $3 million at documented rates — paid for activity the evidence says subtracts value. Check how much your portfolio moved each year, ask for the specific reason behind every significant trade, and treat "sometimes the best move is nothing" (The 1 Question That Explains Why Your Adviser Moves Your Money) as what it becomes at this size: a six-figure discipline, per decade.