Crypto Tax-Loss Harvesting: Legal Strategies to Reduce Your Tax Bill

Selling losing crypto positions to offset gains is legal and effective - but the rules are changing. Here's how to do it right.

Tax-loss harvesting - selling assets at a loss to offset capital gains - is one of the most powerful legal tools available to crypto investors. Done correctly, it can eliminate thousands of dollars in capital gains tax. Done incorrectly, it creates audit risk and potential penalties.

How It Works

If you sold Bitcoin at a $50,000 gain and sold Ethereum at a $30,000 loss in the same year, the loss offsets the gain. You pay capital gains tax on $20,000 instead of $50,000. If your losses exceed your gains, you can deduct up to $3,000 of excess losses against ordinary income. Remaining losses carry forward to future years indefinitely.

Short-Term vs. Long-Term Matching

Short-term losses first offset short-term gains. Long-term losses first offset long-term gains. Then net short-term and net long-term results offset each other. Because short-term gains are taxed at higher rates, harvesting short-term losses is more valuable per dollar than harvesting long-term losses. Strategic timing of sales can optimize the tax benefit.

The Wash Sale Question

Section 1091, the wash sale rule, is written for stock or securities. Ordinary cryptocurrency is property under Notice 2014-21, so as of October 2026 a sale at a loss followed by a repurchase of the same coin is generally not disallowed by section 1091. Tokenized securities are different, and the statute in force for the year of the sale controls. See crypto wash sale rules.

Harvesting Without Selling Out

If you want to maintain exposure to an asset while harvesting a loss, you can sell one cryptocurrency and purchase a different one that provides similar market exposure. Selling Bitcoin and buying Ethereum, for example, is not a wash sale under any interpretation because they are different assets. This allows you to harvest the loss while remaining invested in the crypto market.