For UK crypto holders who got an HMRC nudge letter (or want to get ahead of one before exchange data reaches HMRC). Reconstruct years of messy disposals into one defensible cost-basis workbook, and draft a complete voluntary-disclosure pack for qualified review before anything is filed.
An information, organisation & computation aid for review by a qualified adviser. Not regulated tax, accounting or legal advice.
We have information that suggests you may have disposed of cryptoassets.
Our records indicate you may not have declared gains on cryptoasset disposals on your tax return. You should review your position and tell us about any tax you owe.
If you need to bring your affairs up to date, you can do so. Penalties and interest may apply
"I bought crypto years ago across three exchanges. One shut down. I have no idea what I actually owe — and now there's a letter."
That sentence is the whole problem. The fear isn't the maths — it's the uncertainty: not knowing the number, not knowing the deadline, and a quiet dread that HMRC already has the data and you're on the back foot.
Coins moved between Coinbase, Binance, a hardware wallet and a DeFi protocol. Transfers look like disposals. A platform you used has closed and the CSV is gone. There's no clean record to work from.
This is where everyone gets stuck — including the big SaaS tools. They flag "missing cost basis" and leave you there. Without it, your gain looks far bigger than it really is, and your tax with it.
Section 104 pooling, the same-day rule, the 30-day "bed-and-breakfasting" rule. Get them wrong and your figures are wrong. Get the disclosure wording wrong and you can pay a higher penalty than you needed to.
A nudge letter usually asks you to respond within a set window. And whether a disclosure is treated as unprompted or prompted can affect the penalty range. Delay can reduce the options still available.
*Figures from public sources — see the disclosure note at the foot of this page. All penalty figures are "up to" maxima; verify on GOV.UK.
Under the Crypto-Asset Reporting Framework (CARF), UK cryptoasset service providers report user and transaction data to HMRC. GOV.UK says the first report covers 1 January 2026 to 31 December 2026 and must be submitted between 1 January 2027 and 31 May 2027. The single biggest lever you can still influence is timing and organisation: before you file, get the figures, evidence and disclosure narrative into a form a qualified adviser can review.
UHY reported roughly 65,000 warning letters in 2024/25, up from the prior year. Treat this as a source-sensitive campaign signal, not a guarantee you will receive one.
UK Reporting Crypto-Asset Service Providers collect identity and transaction data for the first reporting period.
The online filing and payment deadline for the 2025/26 tax year — the natural moment to get historic gains right.
The first report covering 2026 activity is due by this date. After this, HMRC's third-party data position is stronger.
Dates and figures rechecked on 16 June 2026 against public sources (GOV.UK and UHY Hacker Young). Always confirm current dates on GOV.UK — and remember this is the reason to organise, not a guarantee of any particular outcome.
The reason people stay stuck is that they try to do everything at once. This kit sequences it: get your position straight, then reconstruct what's missing, then present it to HMRC the way the penalty regime rewards.
List every exchange and wallet you ever used. Use the in-browser reconciliation aid to pull your disposals into one Section 104 pool — with same-day and 30-day rules applied — so you can see an honest gain figure instead of a guess.
Where cost basis is missing — a dead exchange, a lost CSV — the reconstruction playbook shows you what evidence HMRC accepts, how to build a reasonable, honestly-held estimate, and how to document your assumptions so the figure stands up.
Draft your voluntary disclosure using the templates and the route guide (amend a return, or use HMRC's disclosure service). Then hand the organised pack to a qualified adviser to check and adapt before anything is sent to HMRC.
HMRC considers behaviour, disclosure timing and the quality of co-operation. This kit helps you organise the evidence and narrative for qualified review. It does not — and cannot — guarantee a specific penalty figure; that is HMRC's decision, and your adviser's call.
Every item earns its place by removing one specific reason people stay stuck. It's substantive, dated, and built around the parts the big tools leave you to figure out alone.
Editable nudge-letter response and voluntary-disclosure templates, a route decision guide (do nothing / amend / Digital Disclosure Service), behaviour-and-penalty explainer, and a deadline tracker. Drafting tools for review by a qualified adviser before you file.
The missing-history rescue method: acceptable evidence, how to build and document a reasonable estimate when a CSV or exchange is gone, a worked missing-history example, and a defensible-assumptions log template.
A private, client-side workbench: enter or paste disposals, and it applies Section 104 pooling, the same-day rule and the 30-day rule to produce a clear gain summary and SA108-style figures. Your data never leaves your device. A computation aid — check every figure.
The three rules people get wrong, shown step by step with the arithmetic — so you can sanity-check your own numbers and the tool's output instead of trusting a black box.
A clean cover summary, an evidence index, and the questions to ask a crypto-tax accountant — so your adviser receives an organised file instead of a pile of exports and guesses.
Refreshed templates and playbook as HMRC/CARF guidance evolves through the disclosure window, plus a commercial-use licence so bookkeepers and accountants can use it as a billable client aid.
A crypto-specialist Self Assessment can run hundreds of pounds and more for high-volume or DeFi histories. Penalties depend on your facts, behaviour, timing and co-operation. Against that, a fixed-price organisation kit is a low-cost way to get unstuck before adviser review.
Work through the reconstruction workbook and the disclosure pack. If within 60 days it hasn't given you a clearer, better-organised position than you started with — documentation and a plan you'd be comfortable taking to a qualified adviser — email us for a full, no-questions refund, and keep the bonuses. We only win if you get unstuck. Honoured exactly as written, processed through Lemon Squeezy.
No — and we're emphatic about that. CryptoTax Rescue UK is an information, organisation and computation aid with editable templates. It is not regulated tax, accounting or legal advice, and it is not a substitute for a qualified adviser. We strongly recommend a UK-qualified tax adviser (ATT/CTA or equivalent) reviews your figures and your disclosure before you file anything with HMRC. The kit is designed to give that adviser an organised review file, because the groundwork is done.
No. Anyone who promises a specific penalty outcome is misleading you. What's true and verifiable is that HMRC considers behaviour, timing and the quality of disclosure — including telling, helping and giving access to records. This kit helps you organise the facts and draft the narrative for qualified review. The final figure is HMRC's decision.
That's the exact situation this kit is built for, and the part the big SaaS tools abandon you on. The Cost-Basis Reconstruction Playbook walks you through what evidence HMRC accepts, how to build a reasonable, honestly-held estimate where records are genuinely gone, and — crucially — how to document your assumptions so the figure is defensible rather than a guess.
Those are excellent transaction-aggregation tools and you may well still use one. But they price by transaction volume, they leave you stranded on missing cost basis, and — critically — none of them bundle a nudge-letter response and voluntary-disclosure pack. This kit is about the fear and the deadline: how to reconstruct what's missing and how to talk to HMRC, not just how to import a CSV.
The reconciliation aid runs entirely in your browser. Your transaction data never leaves your device — there's no account, no upload, no server. Close the tab and it's gone. That's deliberate: your financial history is nobody else's business.
If you have undeclared gains, getting organised before HMRC contacts you can preserve a better disclosure-timing position. With first CARF reporting due by 31 May 2027 for 2026 activity, the third-party data picture is getting stronger. Run the free exposure check first — it'll tell you honestly whether you likely have anything to do.
Then you pay nothing. The 60-day money-back guarantee is genuine and no-questions. If the kit hasn't left you in a clearer, better-organised position you'd be comfortable taking to an adviser, email us and we refund in full — you keep the bonuses.
Reconstruct the history, fill the gaps defensibly, and draft a disclosure your adviser can sign off fast. Calm, organised, and ahead of the data — for less than the cost of an hour of an accountant's time.
Get CryptoTax Rescue UK — £79or run the free 2-minute exposure check first · 60-day money-back guarantee
This is not regulated tax, accounting or legal advice. CryptoTax Rescue UK is an information, organisation and computation aid with editable templates, sold for general guidance only. It is not provided by a regulated tax adviser, accountant or solicitor, and it is not a substitute for personalised professional advice on your specific circumstances. Tax depends on your individual facts and on rules that change.
Get qualified human review before you file. We strongly recommend that a UK-qualified tax adviser (ATT/CTA or equivalent) or solicitor reviews your figures and your disclosure before you submit anything to HMRC. The in-browser calculator is a reconciliation aid: check every figure it produces against the worked examples and your own records — do not file figures you have not verified.
Figures and dates. Statutory dates, penalty bands and "up to" maxima referenced here and in the product were rechecked on 16 June 2026 and drawn from public sources. They are presented as worst-case maxima and illustrations, never as a prediction of your outcome. Always verify current rules, rates and deadlines on GOV.UK. No specific penalty result is promised or implied.
AI disclosure. This product, its sales copy and its content were created with AI assistance and then structured for this specific use. Before commercial launch, the disclosure-route logic, penalty bands, worked examples and all statutory figures require review and sign-off by a qualified UK tax professional.
CryptoTax Rescue UK is an independent digital product. It is not affiliated with, endorsed by, or connected to HM Revenue & Customs, the OECD, Koinly, CoinTracker or any exchange. "HMRC" and any official names are used descriptively to identify the rules the product helps you respond to.