When most investors evaluate performance, they look at returns.
What they often miss is what happens after taxes.
If you’re a high earner building wealth in a taxable brokerage account, tax drag may be quietly eroding your long-term compounding.
Here’s how it works.
Unlike retirement accounts, brokerage accounts don’t shield you from annual taxation. Dividends are taxed in the year they’re received. Capital gains distributions from mutual funds are taxable whether you sold anything or not. And if you rebalance frequently, you may be realizing gains without meaning to.
Even a seemingly modest annual tax drag of 1% can compound meaningfully over time.
A portfolio earning 7% annually doesn’t grow at 7% if 1% is lost to ongoing taxes. It grows closer to 6%. Over 20–30 years, that difference is substantial. Not because of market volatility, but because of structure.
This is why tax-aware portfolio construction matters.
Asset location decisions — what you hold in your 401(k) versus your brokerage account — can materially affect after-tax outcomes.
Low-turnover ETFs often create less taxable friction than actively managed mutual funds.
Tax-loss harvesting can offset gains and reduce current-year liabilities.
And in some cases, managing dividend yield intentionally can improve long-term efficiency.
None of this is flashy. It won’t make headlines.
But for peak earners in high marginal brackets, taxes are often the single largest ongoing expense in their financial lives.
You can’t control markets.
You can’t control tax policy.
But you can control how exposed you are to unnecessary tax friction.
Over time, what you keep matters more than what you earn.