Tax Loss Harvesting: Smart Strategy or Overhyped?
Tax loss harvesting (TLH) is one of the most popular tax strategies in modern portfolio management. The idea is simple: sell investments that have lost value, use those losses to offset your capital gains, and potentially reduce your tax bill. Robo-advisors like Wealthfront and Betterment have made TLH a core selling point, claiming it can add 0.5-1.5% to your after-tax returns annually.
But how much does it actually save? This calculator breaks down the real numbers.
How TLH Works
Short-term losses offset short-term gains first (which are taxed at your ordinary income rate), then long-term gains. If losses exceed gains, you can deduct up to $3,000 of net losses against ordinary income per year, with the remainder carrying forward indefinitely. The tax savings come from the spread between the tax rate you'd pay on gains and the return you earn by reinvesting the deferred tax.
When TLH Actually Matters
- High tax brackets: If you're in the 32%+ federal bracket plus state tax, the savings become meaningful.
- Large realized gains: If you sell winners (from rebalancing or concentrated positions), TLH directly offsets those gains.
- Bear markets: Market downturns provide abundant harvesting opportunities — 2022 was a TLH goldmine.
When TLH is Overrated
For most investors in lower brackets, TLH is vastly overhyped. The annual savings are often a few hundred dollars — nice, but not life-changing. And there are real costs: wash sale rules can trap you, portfolio tracking becomes more complex, and robo-advisor fees can eat the benefit. More importantly, TLH is a tax deferral strategy, not a tax elimination strategy. You reduce your basis, so when you eventually sell, you pay more tax later. If your future tax rate is the same (or higher), the benefit shrinks or disappears.
The Bottom Line
TLH is a free lunch — but it's a small appetizer, not the main course. Set it and forget it with a robo-advisor if you want; don't let the tax tail wag the investment dog. The real wealth-building decisions are saving rate, asset allocation, and staying invested through downturns.