How to Report Crypto Losses on Your Taxes (Tax Loss Harvesting)

If you’ve lost money on crypto trades, there’s a silver lining: you can use those losses to reduce your tax bill.

Tax loss harvesting is the practice of selling losing positions to realize a capital loss, then using that loss to offset capital gains (or even ordinary income).

How Crypto Losses Reduce Taxes

In most countries, capital losses (selling crypto for less than you paid) can offset capital gains (selling crypto for more than you paid).

Example:

• You bought ETH at $3,000, sold at $2,000 = $1,000 loss
• You bought BTC at $30,000, sold at $40,000 = $10,000 gain
• Net gain = $10,000 - $1,000 = $9,000
• You pay tax on $9,000 instead of $10,000
• Tax saved (at 20% rate) = $200

Carry Forward Losses

If your losses exceed your gains, you can carry the excess forward to future years.

US specific: If your losses exceed gains, you can deduct up to $3,000 per year against ordinary income. The remaining loss carries forward indefinitely.

Example:

• $10,000 in losses, $0 in gains
• Year 1: Deduct $3,000 against ordinary income
• Year 2: Deduct $3,000
• Year 3: Deduct $3,000
• Year 4: Deduct remaining $1,000

Tax Loss Harvesting Strategy

Step 1: Identify Losing Positions

Find crypto in your portfolio that is trading below your purchase price. These are candidates for harvesting.

Step 2: Sell the Losers

Sell the losing positions to realize the loss. This creates a taxable event with a capital loss.

Step 3: Decide What to Do with the Proceeds

Option A: Stay in the market Immediately buy back the same or similar crypto. You maintain your market exposure while realizing the loss.

Option B: Exit the position Use the proceeds to buy a different crypto or take the cash.

Step 4: Report on Your Taxes

Include the realized losses on your tax return to offset gains.

Wash Sale Rules

US: No wash sale rule for crypto (as of 2026)

Unlike stocks and securities, the IRS has not applied the wash sale rule to cryptocurrency. This means you can sell crypto at a loss and immediately buy it back without triggering the wash sale penalty.

However: The IRS may change this rule. Stay updated on legislation.

UK: Wash sale rules apply

HMRC may deny the loss if you buy back the same crypto within 30 days (same-bed-and-breakfasting rules).

Other countries: Varies

Check your local tax authority’s rules on wash sales for crypto.

What Counts as a Loss

Realized losses (taxable event occurred):

• Selling crypto for fiat (USD, EUR, etc.)
• Trading crypto for another crypto (BTC → ETH)
• Spending crypto on goods or services
• Giving crypto away (non-charity)

Unrealized losses (NOT deductible):

• Your portfolio is down but you haven’t sold
• The price dropped but you still hold
• A coin went to zero but you haven’t sold

You must sell or dispose of the crypto to claim the loss.

How to Calculate Loss

Report this on your tax form as a capital loss of $800.

Tools to Track Losses

• CoinTracker — Automatically calculates gains and losses
• Koinly — Tax reporting with loss harvesting features
• CoinLedger — Imports from exchanges and wallets
• Accointing — Portfolio tracking with tax reports

Common Mistakes

1. Not claiming losses you’re entitled to — Every realized loss can potentially reduce your tax
2. Claiming losses on crypto you still hold — Must be sold to claim
3. Incorrect cost basis — Track what you actually paid (including fees)
4. Missing carry forward details — Keep records every year
5. Not reporting small trades — All trades are taxable events, even small ones

Year-End Checklist

• Calculate all realized gains and losses for the year
• Sell losing positions before December 31 to claim losses in the current tax year
• Decide whether to buy back immediately (US) or wait 30 days (UK)
• Generate a tax report from your tracking tool
• Set aside money for any tax owed
• File on time to avoid penalties

Verdict

Tax loss harvesting is a legitimate strategy to reduce your crypto tax bill. If you have losing positions, selling them before year-end can offset your gains and save you money.

For US holders: the lack of a wash sale rule creates a unique opportunity to harvest losses while staying invested.

For everyone: keep detailed records of every trade. You can’t claim a loss if you can’t prove your cost basis.

Related: Crypto Tax Guide for Beginners | Crypto Tax Calculator Guide | Do I Need to Report Small Transactions?

Crypto tax questions dominate BitcoinTalk’s “Legal” board. The community’s advice: harvest losses annually, use a tax tracking tool, and always consult a professional for large amounts.