What Is Tax-Loss Harvesting and How Does It Save You Money?

Tax-loss harvesting is a strategy that lets you reduce your tax bill by selling investments that have declined in value. It sounds counterintuitive — selling losers on purpose — but done correctly, it can save you thousands of dollars in taxes while keeping your investment strategy intact.

How Tax-Loss Harvesting Works

Here's the basic idea:

1. 1You buy Stock A for $10,000. It drops to $7,000 — a $3,000 loss.
2. 2You sell Stock A and lock in that $3,000 loss.
3. 3You immediately buy a similar (but not identical) investment to maintain your market exposure.
4. 4You use the $3,000 loss to offset $3,000 in capital gains elsewhere in your portfolio.
5. 5Result: You pay less in capital gains taxes this year.

What Can You Offset With Losses?

• Capital gains from selling other investments (stocks, real estate, crypto)
• Up to $3,000 per year in ordinary income if losses exceed gains
• Excess losses carry forward to future tax years indefinitely

The Wash-Sale Rule — The Critical Catch

The IRS has a rule to prevent abuse: you cannot sell an investment at a loss and buy the 'substantially identical' investment within 30 days before or after the sale. This is called the wash-sale rule.

• You sell VOO (Vanguard S&P 500 ETF) at a loss → you cannot buy VOO back for 30 days
• But you CAN immediately buy IVV (iShares S&P 500 ETF) — same index, different fund, not 'substantially identical'
• You can also buy a broader fund like VTI (total market) instead
• If you trigger a wash sale, the loss is disallowed and the tax benefit is lost

Who Benefits Most From Tax-Loss Harvesting?

• Investors with taxable brokerage accounts (does NOT apply to 401k or IRA — those are already tax-advantaged)
• People with significant capital gains to offset
• Investors in higher tax brackets (32%+) — the savings are proportionally larger
• Anyone who rebalances their portfolio regularly

Automated Tax-Loss Harvesting

Some robo-advisors like Betterment and Wealthfront offer automated tax-loss harvesting — they scan your portfolio daily and harvest losses automatically. This is a major advantage over managing it yourself, especially during volatile markets.

When NOT to Tax-Loss Harvest

• Inside retirement accounts (401k, IRA) — no taxable gains to offset
• If you're in the 0% capital gains bracket (income under ~$48,000 single / $96,000 married in 2026)
• If transaction costs exceed the tax benefit
• If the replacement investment is significantly worse than what you sold