Crypto Tax Loss Harvesting Calculator

Selling a position that is underwater to realise the loss, so it offsets gains you have already banked elsewhere and lowers your tax bill. You keep the same market exposure if you rebuy — subject to whatever repurchase rules your country applies.

Roughly the loss multiplied by your capital gains rate, capped by the gains available to offset. A $6,000 loss at a 24% rate saves $1,440 — so you recover about 24 cents of every dollar lost, not the dollar itself. Harvesting never makes a loss profitable.

It depends where you file, and the answer varies more than the tax rates do. The US wash-sale rule in IRC §1091 covers stock and securities, and the IRS treats crypto as property, so it does not currently reach it. The UK matches a disposal against acquisitions the same day and for the next 30 days. Canada's superficial-loss rule spans 30 days before as well as after, and purchases by an affiliated person such as a spouse count against you. Spain blocks the loss for two months either side. Australia has no fixed window at all and instead cancels wash sales on intent. Assume your country has a rule until you have checked.

This is genuinely unsettled, whatever other tax tools tell you. Section 581 TCA 1997 sets aside the normal matching order where shares or securities of the same class are sold and reacquired within four weeks, but it is drafted for shares and securities — and Revenue's own Tax and Duty Manual on crypto-assets, Part 02-01-03, last reviewed in January 2026, neither mentions section 581 nor extends it to crypto-assets. Several commercial packages apply it anyway. Get advice before relying on a quick repurchase in Ireland.

In most regimes the excess carries forward, often indefinitely, against future capital gains. Some place an annual cap on how much can offset ordinary income — the US limit is $3,000 a year — which the optional field above models.

The end of your tax year, and it is the disposal date that counts, not the settlement or withdrawal. Most countries use 31 December; the UK uses 5 April, Australia 30 June, South Africa the end of February and New Zealand 31 March.

This calculator answers the question for a single holding. For a whole portfolio the ranking matters, because losses only offset the gains you actually have: once those are down to zero the next sale saves nothing this year. The tax loss harvesting tool at /tax-loss-harvesting/ takes the same CSV you export for tax, works out every open parcel's real cost basis, and prices each one at the margin so the savings add up instead of being promised twice.

Often yes, because the tax saving is real cash now while the position stays a paper loss either way. The trade-offs are transaction fees, spread, the risk of a sharp move while you are out, and a lower cost basis afterwards — which increases the taxable gain if the coin recovers.