Crypto taxes in Washington State: the trap behind “no income tax”

Two separate questions, frequently conflated

"Do I pay tax on crypto in Washington" is two questions. The federal answer is straightforward and applies to everyone. The Washington answer is unusual, applies to a minority, and is the part people get wrong — because the state's lack of an income tax creates a reasonable-sounding but incorrect inference.

Federal treatment: crypto is property

The IRS treats digital assets as property , not as currency. That single characterisation drives everything else. Disposing of property triggers a capital gain or loss equal to the difference between what you received and your cost basis — what you paid, including fees.

Holding period matters. Assets held one year or less produce short-term gains, generally taxed at ordinary income rates. Assets held longer than a year produce long-term gains, taxed at preferential federal rates. Losses can offset gains, with the usual rules about carrying forward excess losses.

Crypto received as income — mining rewards, staking rewards, payment for work, an airdrop in some circumstances — is generally taxed as income at fair market value when you receive it, and that value becomes your basis for a later disposal. Someone in Seattle paid partly in crypto has both an income event on receipt and a capital event on sale.

There is no like-kind exchange treatment for crypto. Swapping bitcoin for ether is a disposal of the bitcoin, full stop, even though no dollars moved. This is comfortably the most common surprise we hear about.

What counts as a taxable event

Washington's capital gains excise tax, and why crypto is inside it

Here is the part that catches Seattle holders. Washington has no personal income tax — that is genuinely true and it is a real advantage of living here. But in 2021 the state enacted a capital gains excise tax, and the Department of Revenue's own guidance treats cryptocurrency as intangible property for its purposes.

The shape of it, in outline. The tax applies to long-term capital gains — assets held more than one year — realised while you are domiciled in Washington. It applies only above a standard deduction, which has been in the region of $278,000 and is adjusted annually for inflation. Recent legislation introduced a tiered structure, with 7% applying above the deduction and a higher rate reaching 9.9% on gains beyond roughly a million dollars. There are exclusions for certain asset classes — real estate most notably — but intangible property such as crypto is not among them.

For the overwhelming majority of Seattle crypto holders, this means nothing at all: a long-term gain of a few thousand dollars sits far below the deduction. For the minority who bought early and held, it can be very significant, and the difference between selling a large position in one tax year versus spreading it can be a large number.

One administrative note worth knowing: the Department of Revenue has allowed prepayment of the capital gains tax ahead of the filing deadline for recent tax years. If you have a large realised gain and want it settled, that facility exists — check the current mechanics on the DOR site .

Domicile, and the Seattle-specific wrinkle

Because the Washington tax turns on domicile at the time of sale, people move here and people move away, and both directions have consequences that are easy to get wrong.

Someone relocating to Seattle from a state with an income tax will often find their overall position improves substantially — no state tax on wages, and state-level exposure on investment gains limited to large long-term gains above a sizeable deduction. That is a real benefit and it is one reason the city attracts people with concentrated equity and crypto positions.

Someone leaving Washington needs to be careful about the timing of a sale relative to a genuine change of domicile, and someone arriving needs to understand that gains realised after they become domiciled here are within scope even if the asset was acquired elsewhere. Domicile is a facts-and-circumstances question — it is not simply where you slept most nights — and it is precisely the sort of question that justifies professional advice rather than a website.

The records you need, and why exports are not enough

Cost basis is your responsibility. Platforms report what they can see, and what they can see is frequently incomplete — an asset you bought on one exchange, withdrew to a wallet, and later deposited to a second exchange arrives at the second platform with no basis attached. If you sell it there, the reporting can look as though the entire proceeds are gain.

Keep, for every transaction: the date and time, the asset, the quantity, the US dollar value at the time, the fee, the counterparty or platform, and the transaction ID. A spreadsheet is entirely adequate. Do it on the day; reconstructing it later from three exchange exports and a chain explorer is one of the more miserable ways to spend a weekend.

Two Seattle-specific record-keeping notes. If you buy at a kiosk or a retail counter, keep the paper receipt and the in-app record — the receipt is often the only clean statement of what dollar amount produced what quantity, and our fees guide explains why the headline fee and the actual cost differ. And if you have ever used a crypto debit card, expect a long tail of small disposals; that is the hidden cost of those products, covered in our card guide.

Common mistakes, and how to avoid them

1. Assuming no state income tax means no state tax. Washington's capital gains excise tax exists and treats crypto as intangible property.
2. Forgetting that swaps are disposals. Trading one token for another is taxable federally even though no dollars moved.
3. Relying on platform exports for basis. Transferred-in assets usually arrive with no basis. Your own record is the authority.
4. Treating small spending as invisible. Every purchase made with crypto is a disposal, however small.
5. Ignoring holding period before a large sale. It changes federal rates and determines whether the Washington tax engages at all.
6. Selling a large position without advice. Above the state deduction, the amounts justify a professional many times over.

Tax questions from Washington readers

Does Washington State tax cryptocurrency?

Washington has no personal income tax, so crypto gains are not taxed as income at state level. However, Washington levies a capital gains excise tax on certain long-term gains from the sale of capital assets, and the Department of Revenue treats cryptocurrency as intangible property for that purpose. It applies if you are domiciled in Washington at the time of sale and your long-term gains exceed the standard deduction.

How much is the Washington capital gains tax on crypto?

The tax applies to long-term capital gains above a standard deduction that has been in the region of $270,000–$278,000 and is adjusted annually for inflation. Recent legislation introduced a tiered structure, with 7% on gains up to roughly $1 million above the deduction and 9.9% on the portion beyond that. Check the current figures with the Department of Revenue for the tax year in question.

Do I pay tax if I just buy and hold crypto in Seattle?

No. Buying with US dollars and holding is not a taxable event federally or at Washington state level. Tax arises on disposal — selling for dollars, swapping one crypto for another, spending it on goods or services, or in some cases receiving it as income. Holding, transferring between your own wallets, and simply watching the price move are not disposals.

Is swapping one cryptocurrency for another taxable?

Yes, federally. Swapping bitcoin for ether is a disposal of the bitcoin at its fair market value at the time of the trade, and any gain or loss against your cost basis is reportable. This surprises a lot of people because no US dollars moved. There is no like-kind exchange treatment available for crypto.

Does Washington tax short-term crypto gains?

The Washington capital gains excise tax as enacted applies to long-term gains — assets held more than one year. Short-term gains are outside it, though they remain fully taxable federally, generally at ordinary income rates. Because the interaction between holding period and state liability can materially change what you owe, this is a point worth discussing with a licensed tax professional before a large sale.

Do crypto exchanges report to the IRS?

US-facing exchanges issue tax forms and report to the IRS, and digital asset reporting obligations have been expanding. Assume every transaction on a licensed US venue is visible. Keep your own records regardless — platform reporting frequently lacks the cost basis for assets you transferred in from elsewhere, and reconciling that is your responsibility.