Crypto Wash-Sale Loophole: How to Harvest Losses in 2026

Marcus put $6,000 into Ethereum in early October 2025, the same week Bitcoin set its all-time high near $126,272. By this past June his stake was worth about $2,400.

He assumed the only thing to do with a loss like that was hold and hope. He was wrong. Marcus can sell the whole position, book a $3,600 capital loss on his tax return, and buy the same Ethereum back that same afternoon. The loss stays. His coins come back at today's price. A stock investor who tried the identical move would have the deduction erased by the IRS.

That gap has a name, or rather, it exists because of a name the IRS never gave crypto. And after a committee vote in Washington this month, it's probably in its final year.

Why the Wash-Sale Rule Skips Crypto

The wash-sale rule lives in Section 1091 of the tax code, and it's written narrowly. It disallows a loss when you sell "stock or securities" and buy the same or a substantially identical security within 30 days before or after the sale. That's a 61-day window, 30 days on each side plus the day of the sale. Trip it, and your loss doesn't vanish forever, but it gets rolled into the cost basis of the replacement shares instead of hitting this year's return. You wanted the deduction now. You don't get it now.

The part that matters for crypto is the label. The IRS classifies cryptocurrency as property, not as a security. That treatment goes back to Notice 2014-21, and it has never changed. Bitcoin, Ethereum, and the rest sit in the same tax bucket as a rental house or a painting, not the same bucket as Apple stock. Section 1091 says "stock or securities." Crypto is neither. So the rule that governs stock harvesting simply doesn't reach it.

What This Lets You Do That a Stock Investor Can't

A stock investor who wants to harvest a loss faces a real dilemma. Sell, and you're out of the market for a month, exposed to a rebound you can't participate in. Buy a similar-but-not-identical fund to stay invested, and you're playing a careful game about what counts as "substantially identical." Crypto investors skip all of that. You sell, you rebuy, you never really leave your position. The only thing that changes is your cost basis and the loss now sitting on Schedule D.

That's why crypto loss harvesting is less about strategy and more about paperwork. If a coin you hold is worth less than you paid, and you still believe in it, you can capture the loss without giving up the coin. The economic reality of your portfolio barely moves. Your tax bill does.

There's also no timing dance. A stock harvester has to calendar the 31-day gap and resist the urge to jump back in early. A crypto harvester sells and rebuys inside the same hour if they want to, which removes the single most common way people accidentally blow their own harvest.

What a Harvested Loss Is Worth

Capturing a loss isn't the goal. Lowering a tax bill is. So it helps to know what a loss buys you.

Losses first cancel out capital gains of the same type, short-term against short-term, long-term against long-term, then the categories net against each other. Crypto you've held a year or less produces a short-term loss, which is the more valuable kind because short-term gains are taxed at your ordinary rate. Once your losses have wiped out your gains, up to $3,000 of leftover loss can offset ordinary income, wages, freelance earnings, interest. Anything beyond that carries forward to next year and every year after, with no expiration.

Put numbers on it. Say you harvest $10,000 in crypto losses this year. You also sold a stock fund for a $4,000 long-term gain. The first $4,000 of your loss erases that gain, saving you $600 if you'd have paid the 15% long-term rate. The next $3,000 comes off your ordinary income. In the 24% bracket, that's another $720. The remaining $3,000 rolls into next year, waiting to offset a future gain or another slice of income. So a paper loss you were sitting on turned into roughly $1,320 of real tax savings this year, plus a $3,000 credit toward next year, and you still own the same coins.

None of that requires you to sell anything you didn't already regret owning at that price.

Congress Just Voted to Close It

Something shifted this month. On September 16, 2026, the House Ways and Means Committee approved H.R. 10357 by a vote of 38 to 5. The bill, introduced two days earlier, is the most complete crypto tax framework Congress has produced, and buried in its anti-abuse section is a line that extends the wash-sale rule to digital assets. The committee's own press release called it "historic." For loss harvesters, it's closing time.

This isn't a fringe idea anymore. Senator Cynthia Lummis unveiled digital-asset tax legislation in the summer of 2025 that included the same 30-day wash-sale provision, and a competing House framework, the PARITY Act, carried it too. Both parties want it, and the reason is money: past Treasury estimates pegged the revenue from applying wash-sale rules to crypto at roughly $23.5 billion over a decade. A provision that raises that kind of revenue tends to survive whatever horse-trading happens on the way to a final bill.

The one thing to be clear about: as of late September 2026, none of this is law. A committee vote is a long way from the President's desk, and the effective date in any final bill hasn't been settled. What that means in practice is that the current tax year still runs under the old rules, and this is the loudest signal yet that the door is shutting. Reporting broke this week; the law hasn't caught up yet. If you have losses worth harvesting, the smart read is to treat 2026 as the last clean year and not assume 2027 will look the same.

The Catches Most People Miss

The loophole is real, but a few things trip people up.

The holding period resets. When you rebuy, your clock starts over. If those coins keep falling and you sell again in a few months, that's a short-term loss now, and if they recover and you sell at a gain, you've turned what could have been a long-term gain into a short-term one taxed at your ordinary rate. Rebuying isn't free of consequences; it just isn't a wash sale.

There's a doctrine to respect, too. The IRS can challenge transactions that have no purpose beyond the tax benefit under what's called the economic substance doctrine. It hasn't been tested against crypto harvesting, and most tax pros think a genuine sale at market price with real price risk between the sell and the rebuy is defensible. Still, selling and rebuying at the exact same second, over and over, purely to manufacture losses is the kind of thing that invites a second look. A clean harvest looks like a normal trade.

Your broker is watching now, which is a good thing. Starting with 2025 transactions, exchanges report your crypto sale proceeds to the IRS on the new Form 1099-DA. The days of crypto being an off-the-books corner of your return are ending. Keep your own records of what you paid and when, because accurate cost basis is what turns a messy pile of trades into a clean, defensible loss.

And the oldest rule still applies: don't let the tax tail wag the dog. Harvesting a loss on a coin you were going to sell anyway is smart. Selling a coin you want to hold for the long term, just to grab a deduction, can backfire if it runs up while you're deciding whether to rebuy. The tax savings are a bonus on a decision you'd make regardless, not a reason to trade.

The Bottom Line

Crypto's exemption from the wash-sale rule is one of the few tax breaks that rewards you for holding through a bad year, and it may not last past this one. Here's what to do before December 31:

1. Pull your crypto cost basis this week. Log into every exchange you use and export the buy price and date for each holding. You're looking for coins worth less than you paid. Your exchange's tax center or a tool like CoinTracker or Koinly will total your unrealized losses in a few minutes.
2. Harvest the losses on coins you still believe in. Sell the losing positions to lock in the deduction, then rebuy the same coins if you want to stay invested. There's no 31-day wait, but leave enough of a gap that the sale is a real trade at a real market price.
3. Match losses to gains first, then income. Use harvested losses to erase any capital gains you took this year, then let up to $3,000 offset your ordinary income. Track the carryforward for anything left over; it's good for future years.
4. Book it in 2026, and revisit the rules next fall. Treat this as the last year the loophole is a sure thing. Once a final bill sets an effective date, the same move may cost you the deduction.