The step that stalls most people is not the arithmetic. It is sitting there with the numbers done and no idea which box they belong in — because no country has a dedicated “crypto tax form”. Crypto splits into the existing capital gains machinery and the existing income machinery, and the entry point is often folded away behind a screen you have to expand yourself. We walked all four filing flows and noted where crypto enters, which form catches it, and which fields get botched. One caveat before the tour: form numbers and online screens get shuffled every year, so treat this as the structure and location, and defer to whatever the official interface shows the year you file.
Sort into two piles first: gains or income?
Before touching any form, split the year’s crypto activity into two piles — this single sort decides where every number lands:
- Gains and losses from disposals (selling, swapping, spending) → the capital gains forms.
- Income from receipt (staking, airdrops, mining, interest, getting paid in crypto) → the income forms, at market value when received.
The same coin can appear in both piles — income when it arrived, a capital gain when it left. Why that split matters so much is covered in the complete guide; here we follow each pile into the four systems.
United Kingdom: crypto hides inside SA108
UK individuals file through Self Assessment. Disposal gains and losses belong to the capital gains section — supplementary pages SA108 (Capital Gains Summary) — while income-type receipts join the relevant income boxes.
Where the entrance is
Filing online, crypto does not surface anywhere obvious on the main SA100. The gate is the “Tailor your return” screen: answer yes to having capital gains to report, and only then does the SA108 section unfold. A large share of accidental omissions trace back to that one unticked box. Separately, HMRC offers a “Report and pay CGT” route for people not otherwise in Self Assessment — an alternative channel, not an extra compulsory step. Whether it fits your case is a question for HMRC’s current pages.
The SA108 asks for totals — disposal proceeds, allowable costs, gains — with same-token costs pooled under Section 104. Allowance figures and rates live on the UK page.
United States: answer the question, then itemise on 8949
Form 1040 opens with the digital asset question — did you receive, sell, exchange or otherwise dispose of a digital asset this year? — which every filer answers, trades or no trades. From there, disposals go line by line onto Form 8949, totals flow to Schedule D, and income-type receipts (staking rewards, crypto pay) usually land on Schedule 1 or the matching income form.
Where the entrance is
The digital asset question sits right under the name and address block on page one — prominent, and still reflexively checked “No”. The detail lives on Form 8949: one row per disposal, with acquisition date, disposal date, proceeds, basis and gain, split into short-term and long-term sections. The boundary trips people constantly: long-term means held more than one year — exactly one year is still short-term. And when a broker’s 1099 disagrees with your own records, rely on the basis you can actually reconstruct and evidence.
Rates, the loss offset and the 1099-DA timeline are on the US page and in the losses guide.
Australia: expand the CGT step in myTax
Most Australian individuals lodge through myTax (via myGov). Disposal outcomes belong to the capital gains step; receipt-type income joins other income.
Where the entrance is
myTax works as a question-by-question flow, and the crypto entrance — “Capital gains or losses” — stays collapsed until you tick it during the personalise step. No tick, no section, no report. On the discount: eligible individuals holding 12+ months get it applied through the flow — do not pre-discount your own figures before entering them, or it gets applied twice.
Discount mechanics and record expectations are on the Australia page.
Germany: private sales belong on Anlage SO
Germany files crypto disposals under the private sales framework on form Anlage SO, submitted electronically through ELSTER. The one-year exemption shapes what needs filing at all.
Where the entrance is
Inside ELSTER, crypto does not belong on Anlage KAP — that form is for interest and dividends, and it is the single most common wrong turn. Private crypto sales go on Anlage SO, under other income / private sales. Broadly, only disposals held under a year and in profit need entering; past-a-year disposals are generally exempt — but proving the holding period, with acquisition and disposal dates, stays your burden. Thresholds per the official rules for the year.
The one-year clock and the €1,000 limit are on the Germany page.
Four countries compared
| Country | Disposal gains go on | Online entrance | Receipt-type income |
|---|---|---|---|
| United Kingdom | SA108 (Capital Gains Summary) | Self Assessment → tick capital gains in “Tailor your return” | Relevant income boxes |
| United States | Form 8949 → Schedule D | 1040 digital asset question → 8949 line by line | Schedule 1 etc. |
| Australia | CGT section | myTax personalise → tick capital gains/losses | Other income |
| Germany | Anlage SO (private sales) | ELSTER — and not Anlage KAP | Other income / relevant boxes |
Fillings that bounce, and omissions that surface
- Never expanding the entrance — the UK’s “Tailor your return” and Australia’s personalise step both need an active tick. Collapsed-by-default is the leading cause of honest omission.
- Germany’s wrong form — Anlage SO, not Anlage KAP. The mix-up earns a correction request.
- Reporting free coins only as gains — drop the income pile entirely and the mismatch shows the moment records are compared.
- Copying an exchange summary that contradicts your records — file from what you can reconstruct and evidence; see keeping records.
- Starting the night before the deadline — exporting from several exchanges and rebuilding cost takes longer than any form does.
Having walked these flows ourselves: the filling-in is the fast part. The hours disappear into turning a year of scattered history into numbers fit for the boxes. Which is the honest argument for keeping records as you go — come filing season, all that remains is transcription.
FAQ
My exchange already reports to the tax authority. Do I still file?
I only made a handful of trades. Is the whole process still required?
What if I missed the deadline or filed something wrong?
Official sources
- UK: HMRC, Self Assessment and Capital Gains Summary (SA108) — gov.uk/self-assessment-tax-returns
- US: IRS, Digital assets and the Form 8949 / Schedule D instructions — irs.gov/filing/digital-assets
- Australia: ATO, Crypto asset investments and myTax guidance — ato.gov.au/…/crypto-asset-investments
- Germany: BMF letter on cryptoassets; ELSTER / Anlage SO — bundesfinanzministerium.de
Checked against the official pages on 1 September 2026. Form numbers, entrances, deadlines and thresholds move yearly; each authority’s publication governs.
Before you follow this literally
Filing systems get redesigned annually. This page teaches the location and logic of the entrances, not box-by-box instructions, and it is not tax, legal or investment advice for your situation. On filing day, the official interface in front of you governs; for large amounts, cross-border facts or classification doubts, a licensed professional’s hour is cheap insurance.