Wash Sale Rule and Crypto: What Traders Must Know

The Wash Sale Rule is a tax provision enforced by the IRS that disallows a loss deduction when a taxpayer sells an asset at a loss and repurchases the same or a substantially identical asset within 30 days before or after the sale. Beginning in the 2026 tax year, this rule officially extends to cryptocurrency — closing a loophole that crypto traders relied on for years.

Who This Applies To

This rule affects all US taxpayers who buy and sell cryptocurrency, regardless of whether they trade on centralized exchanges, decentralized platforms, or through self-custodied wallets. It applies to every crypto asset classified as a digital asset under the updated tax code, including Bitcoin, Ethereum, stablecoins, and altcoins.

Prior to 2026, the IRS classified cryptocurrency as “property” rather than a “security,” which meant wash sale rules did not apply. Traders could sell crypto at a loss and immediately repurchase the same asset to harvest the tax loss without restriction. The Infrastructure Investment and Jobs Act of 2021 (signed into law in November 2021) changed this by bringing digital assets under the wash sale umbrella, with an effective date of January 1, 2026.

Key Rules

30-Day Window Applies to Crypto

For any crypto sale at a loss occurring on or after January 1, 2026, the 30-day wash sale window is in effect. This means traders cannot sell a cryptocurrency at a loss and repurchase the same asset within 30 days before or after the sale without triggering the disallowance. The window covers 61 total calendar days — 30 days before the sale, the sale date, and 30 days after.

Pre-2026 Exemption Is Gone

Before 2026, crypto trading taxes did not include wash sale restrictions. This made cryptocurrency uniquely attractive for tax-loss harvesting strategies, since traders could realize losses and maintain their positions simultaneously. That advantage no longer exists.

Substantially Identical Assets

The IRS has not yet issued comprehensive guidance on what constitutes “substantially identical” in the crypto context. However, traders should exercise caution with wrapped tokens (ETH vs. WETH), tokenized versions of the same asset on different blockchains, and hard fork derivatives. Distinct cryptocurrencies — such as BTC and SOL — are generally not considered substantially identical.

Disallowed Losses Adjust Cost Basis

A wash sale does not destroy the loss permanently. The disallowed amount is added to the cost basis of the replacement asset. If a trader sells 1 BTC at a $3,000 loss and repurchases within the window at $40,000, the new cost basis becomes $43,000, preserving the deduction for a future qualifying sale.

Cross-Account and Cross-Exchange Transactions

The rule applies regardless of where the repurchase occurs. Selling on one exchange and buying on another, transferring between wallets, or using a DeFi protocol to reacquire the same asset all count. Traders must track activity across every platform.

Practical Examples

Wash sale triggered (2026+): On March 5, 2026, a trader sells 5 ETH purchased at $4,000 each for $3,200 each, realizing a $4,000 loss. On March 15, the trader buys 5 ETH at $3,300 each. Because the repurchase is within 30 days, the $4,000 loss is disallowed. The cost basis of the new ETH is adjusted to $3,300 + $800 = $4,100 per coin.

No wash sale — different asset: On April 10, 2026, a trader sells 10,000 DOGE at a $1,500 loss and immediately uses the proceeds to buy SOL. Because DOGE and SOL are not substantially identical, the $1,500 loss is fully deductible.

Pre-2026 harvest (no longer available): In December 2025, a trader sells 2 BTC at a $6,000 loss and repurchases 2 BTC five minutes later. The full $6,000 loss is deductible on the 2025 return because the wash sale rule did not apply to crypto before 2026.

How JournalPlus Helps with Compliance

JournalPlus automatically logs every crypto trade with precise timestamps, entry and exit prices, and realized P&L across all connected exchanges. This creates an auditable record that makes it simple to identify whether any repurchase falls within the 30-day wash sale window.

The platform’s tax report export calculates adjusted cost basis when wash sales are flagged, saving traders from manual spreadsheet work that is prone to error. For traders managing positions across multiple exchanges, having a single consolidated view is critical for spotting cross-platform wash sale triggers.

By tagging each trade with its asset, date, and account, JournalPlus gives traders the visibility they need to execute tax-loss harvesting strategies that stay on the right side of the updated rules — harvesting legitimate losses while avoiding accidental disallowances.

This content is for educational purposes only and does not constitute legal, tax, or financial advice. Tax laws and trading regulations change frequently. Consult a qualified tax professional or attorney for advice specific to your situation.

Frequently Asked Questions

Does the wash sale rule apply to crypto in 2026?

Yes. Starting with the 2026 tax year, cryptocurrency is subject to wash sale rules under changes enacted by the Infrastructure Investment and Jobs Act. Selling crypto at a loss and repurchasing within 30 days will disallow the loss deduction.

Can I still tax-loss harvest crypto?

Yes, but you must wait at least 31 days before repurchasing the same cryptocurrency. Alternatively, you can sell one crypto asset and purchase a different, non-substantially-identical asset without triggering a wash sale.

Are different cryptocurrencies considered substantially identical?

Generally, distinct cryptocurrencies like BTC and ETH are not substantially identical. However, wrapped tokens (e.g., ETH and WETH) or tokens tracking the same underlying asset may be treated as substantially identical by the IRS. Final guidance is still expected.

What happens to a disallowed crypto wash sale loss?

The disallowed loss is added to the cost basis of the replacement cryptocurrency. This defers — but does not eliminate — the tax benefit to a future sale of that asset.

Do wash sale rules apply across different crypto exchanges?

Yes. Wash sale rules apply across all accounts, exchanges, and wallets you control. Selling on Coinbase and buying back on Kraken within 30 days still triggers the rule.