Crypto Tax-Loss Harvesting: How to Reduce Your Tax Bill

Tax-loss harvesting is one of the most powerful crypto tax strategies. By selling at a loss, you can offset gains and reduce your tax bill.

Here’s how it works, the rules, and real examples.

How Tax-Loss Harvesting Works

Step 1: Identify Losses

Find crypto positions that are below your purchase price:

Step 2: Sell to Harvest

Sell the losing positions to realize the losses:

Step 3: Offset Gains

Use the losses to offset your gains:

Step 4: Reinvest

Buy back into crypto (but not the same coin within 30 days):

The Rules

US: Wash Sale Rule

UK: Same-Day Rule

Canada: Superficial Loss Rule

Tax-Loss Harvesting Example

Before Harvesting

After Harvesting

Savings: $2,000

When to Harvest

What You Can Harvest

What You Can’t Harvest

Scenario by scenario

Putting a harvesting plan together

You do not need complexity to make harvesting work. Mid-year, review your portfolio for positions sitting well below cost and decide which you are genuinely happy to exit. As the year closes, revisit that list alongside your realised gains for the year so the losses land exactly where they reduce tax. For each candidate, confirm the relevant jurisdiction’s window — roughly 30 days on either side in the US, UK, and Canada — before repurchasing. If you want to stay in the asset, choose a close-but-not-substantially-identical alternative for the waiting period. A calendar reminder for November catches most people who otherwise forget.

What to avoid

The recurring mistake in tax-loss harvesting is chasing the deduction rather than the position. Selling a coin you still believe in purely to bank a loss means paying the price of a potential rebound, and the rules punish a quick rebuy by disallowing the loss entirely. Many investors also overlook the traps: unrealised losses can’t be harvested until there is a disposal, worthless positions with lost keys generate no taxable event, and stolen or gifted crypto provide little or no relief. Finally, don’t let harvesting turn into market timing — the goal is to trim what you no longer want and offset real gains, not to optimise a deduction into an active-management hobby.

Common questions

Most people wonder whether harvesting is worth the effort for small positions. If your losses are tiny and your gains smaller, the paperwork may outweigh the benefit, and the tax software you already use will tell you the numbers either way. A more pressing question is how these rules interact when you hold crypto across several countries or platforms — each jurisdiction applies its own window, so treat your holdings per country of residence. And because the IRS wash sale rule has been proposed but not finalised, the safe approach is to wait the 30 days regardless rather than assume crypto is exempt. When losses are large, a tax professional can confirm how they interact with your wider capital gains picture.