Crypto Tax Loss Harvesting in 2026: How It Works and What the Rules Actually Say

Why Crypto Tax Loss Harvesting Is Different From Stocks

The wash sale rule prohibits investors from claiming a capital loss on a security if they buy the same or “substantially identical” security within 30 days before or after the sale. For stock investors, this means you cannot sell Apple stock at a loss, immediately repurchase Apple, and claim the loss on your taxes. You must wait 31 days before repurchasing, accepting price risk during that window.

The IRS classifies cryptocurrency as property, not securities. As of 2026, the wash sale rule does not apply to crypto. You can sell Bitcoin at a loss at 4pm and repurchase it at 5pm the same day. The loss is realized and available to offset other capital gains. You maintain your position and your tax benefit simultaneously. This is the structural reason crypto tax loss harvesting has become common practice among active holders.

The exception: Bitcoin ETFs (such as IBIT or FBTC) are securities. Selling a Bitcoin ETF at a loss and repurchasing within 30 days triggers the wash sale rule. Selling the ETF and immediately buying spot Bitcoin (or vice versa) is currently permissible because they are different assets, though the IRS may interpret this as a wash sale in future guidance. Selling spot Bitcoin at a loss and repurchasing spot Bitcoin remains fully permissible under current law.

Concrete Dollar Example: What Harvesting Actually Saves

Scenario: You purchased 1 BTC at $50,000 in January and it is now worth $30,000, a $20,000 unrealized loss. You also have $20,000 in realized gains from selling an Ethereum position earlier in the year.

Without harvesting: your $20,000 Ethereum gain is taxable. At a short-term capital gains rate of 35% (ordinary income rate for high earners), you owe $7,000. At the long-term rate of 20%, you owe $4,000.

With harvesting: sell the Bitcoin at $30,000, realizing a $20,000 loss. The loss offsets the $20,000 Ethereum gain. Net taxable gain: $0. Tax owed: $0. Immediately repurchase Bitcoin at $30,000. Your new Bitcoin position has a $30,000 cost basis; your future gain or loss is calculated from that new basis, not the original $50,000.

What you have done: reduced your tax bill by $4,000 to $7,000 this year. What you have not done: permanently avoided the loss. If Bitcoin recovers to $50,000 and you sell, you realize a $20,000 gain on the lower cost basis. The harvesting defers and potentially re-characterizes the tax, but if you hold long enough to meet the long-term holding period threshold, the gain qualifies for the lower long-term rate.

Carryforward: What Happens to Excess Losses

If your harvested losses exceed your capital gains in a given year, up to $3,000 of net capital loss can be deducted against ordinary income. The remaining loss carries forward indefinitely to future tax years.

Example: you harvest $25,000 in crypto losses in a year where you have $10,000 in capital gains. Net loss: $15,000. $10,000 offsets your gains (tax savings there). $3,000 deducts against ordinary income (tax savings of approximately $1,050 at 35%). Remaining $2,000 carries forward to the next tax year, where it offsets the first $2,000 of capital gains you realize.

The carryforward has no expiration. Investors with large accumulated losses from bear market harvesting may carry forward several years of loss offsets, reducing their tax liability on future bull market gains substantially. This is the mechanism by which aggressive harvesting during down markets creates a multi-year tax benefit.

Short-Term vs Long-Term: Which Losses to Harvest First

Capital losses are applied in a specific order: short-term losses first offset short-term gains, then long-term losses offset long-term gains. Remaining net losses in each category offset the other category. The order matters because short-term gains are taxed at ordinary income rates (up to 37%), while long-term gains are taxed at 0%, 15%, or 20%.

This creates a hierarchy: harvesting short-term losses is most valuable because they offset short-term gains at the highest tax rate. If you have a choice between harvesting a short-term loss (held less than one year) and a long-term loss (held more than one year) of the same size, the short-term loss typically generates larger immediate tax savings if you also have short-term gains to offset.

Staking Income and Loss Interaction

Staking rewards are taxable as ordinary income when received, not as capital gains. Harvested capital losses do not directly offset staking income in the same way they offset capital gains. The $3,000 net loss deduction against ordinary income applies here, but beyond that ceiling, harvested losses cannot reduce staking income tax.

Example: you have $15,000 in staking income and $20,000 in harvested capital losses with no capital gains. The $20,000 loss offsets $0 in gains (you have none), $3,000 deducts against ordinary income (including staking income), and $17,000 carries forward to future years. The staking tax bill is not eliminated by the harvesting; only the $3,000 deduction applies against that income stream.

State Tax Considerations

Federal tax loss harvesting strategies apply at the state level in most states, since most state income tax codes conform to federal treatment of capital gains. However, some states do not allow the $3,000 capital loss deduction against ordinary income, or apply different rates to capital gains and losses. California, for example, taxes all capital gains as ordinary income (no preferential long-term rate at the state level), which changes the relative value of short-term versus long-term loss harvesting for California residents. Verify your state’s treatment before assuming federal strategy translates directly.

DeFi Complexity

DeFi positions add complexity to harvesting because the cost basis of LP tokens, yield farm positions, and protocol-issued tokens is often unclear and the “sale” that triggers realization may not be obvious. Withdrawing from a liquidity pool, for example, may constitute a sale of the LP tokens with a gain or loss calculated from when you entered the position. If the pool has experienced impermanent loss, this may be realizable as a capital loss, but the calculation requires knowing the USD value of the LP tokens at entry and exit, which crypto tax software handles differently.

For DeFi tax loss harvesting specifically, software that accurately tracks entry and exit values of protocol positions is essential. Manual reconstruction of these figures is error-prone and time-consuming.

Using Koinly for Tax Loss Harvesting

Koinly’s tax loss harvesting report identifies positions currently showing unrealized losses along with the potential tax savings from harvesting them, based on your connected exchange and wallet data. The workflow: connect your accounts through Koinly, review the TLH report to identify candidates, execute the sales and repurchases on your exchange, and then generate your updated tax report to confirm the losses are captured correctly. The TLH report is most useful in October and November when you still have time to execute harvests before December 31.

After harvesting, generate your updated tax summary in Koinly and verify the loss positions appear correctly in your gain/loss calculation before filing. The platform’s cost-basis tracking maintains your new lower basis on repurchased positions for future tax years automatically.

What This Strategy Does Not Do

Tax loss harvesting is a deferral strategy, not a permanent tax elimination. The losses reduce your tax bill now at the cost of a lower cost basis going forward. If you never sell the repurchased positions, the tax is deferred until death (when the step-up in basis at death may eliminate it, depending on future tax law). If you sell in a bull market, the gain is taxed at the rate applicable at the time of sale. The benefit is the time value of money on the deferred tax and the potential to re-characterize short-term gains as long-term gains by holding past the one-year threshold after repurchase.

Who Should Prioritize TLH and Who Should Not

Tax loss harvesting is most valuable for: investors in higher tax brackets where the immediate savings from harvesting are largest (the higher your marginal rate, the more valuable each dollar of recognized loss); investors with significant short-term gains in the same year (harvesting short-term losses offsets these first, eliminating gains taxed as ordinary income); and investors with a long time horizon who benefit most from deferring the tax bill across a decade or more of compounding.

TLH is less useful for: investors in the 0% long-term capital gains bracket (income below approximately $47,000 for single filers in 2026) who would pay nothing on long-term gains anyway; investors who are close to needing to sell the repurchased positions, which eliminates most of the benefit of deferral; and investors with very small portfolios where the transaction costs of executing the harvest and repurchase approach the tax savings.

The wash sale rule applies to securities but does not apply to crypto under current US tax law, which is why crypto TLH is more straightforward than equity TLH. In equities, selling a stock at a loss and repurchasing an identical security within 30 days disallows the loss. There is no equivalent restriction in crypto. This could change through future legislation, and the safe practice is to assume wash sale rules may eventually apply to crypto when planning long-term TLH strategies.

Annual Review: When to Do This

The most effective time to review your portfolio for TLH candidates is October to November, when you still have two months of the tax year remaining to execute harvests before December 31. Waiting until December increases the risk of missing the deadline if your exchange has settlement delays or if you need to review your cost-basis tracking carefully before selling. A mid-year review in June or July can also identify opportunities, particularly if the market has pulled back from a first-quarter peak and created unrealized losses you would not have had at year-end of the prior year.

Marko Jambrek

Licensed architect in Zagreb, 30 years of practice (Vastu + sustainable design). Writes about AI tools through a lens of order and long-term value, tests before recommending.