United Kingdom. HMRC's published cryptoasset rules, and what they demand of an adviser
Crypto accountant UK: what one has to be able to handle
Most people choosing a crypto accountant compare fees, because that is the number on the page. The better filter is capability, and it is checkable: HMRC's published rules contain a small number of specific mechanics that a general practice will not have met and that decide whether a return is right. Exchanging one token for another is a disposal. Every type of token has to be grouped into a pool with a pooled cost. There is a same-day rule and a 30 day rule that sit outside the pool. Ask about those four and the shortlist sorts itself.
| Option | Token-to-token disposals, pooling, same-day and 30 day rules; checked against HMRC guidance 15 August 2026 | ||||
|---|---|---|---|---|---|
| Do it yourself A single holding, bought and sold in pounds, with a complete record | Working out the position from HMRC's own guidance and reporting it through Self Assessment. Entirely legitimate and, for a simple case, proportionate. | Only if you do. The guidance states the rules plainly: a disposal includes selling, exchanging for a different type of cryptoasset, using tokens to pay for goods or services, and gifting other than to a spouse, civil partner or charity. | You. HMRC requires separate records for each transaction, including the type of tokens, the date of disposal, the number of tokens disposed of and their pound sterling values. | You, entirely. | Your time, and it scales badly. A few dozen transactions is an evening; a few thousand across several exchanges is not a manual job at all. |
| Crypto tax software, then self-file High transaction counts on mainstream exchanges, with a simple underlying position | A tool that ingests exchange and wallet histories, applies pooling and the matching rules, and produces a gain figure you report yourself. | Mechanically, usually well. The pooling and matching rules are exactly the sort of arithmetic software is good at, and doing it by hand across thousands of transactions is where manual errors live. | The software, from your exports, which is the point. HMRC's record requirement is per transaction, and an export plus a report is a far better answer than a spreadsheet rebuilt from memory. | You. A tool's output is only as good as the completeness of what you fed it, and missing wallets are the standard defect. | A subscription, usually banded by transaction count. Cheap relative to fees, and it does not answer the questions that need judgement. |
| Your existing accountant A modest crypto position alongside a business or employment return you already file with them | The practice that already does your return, adding the crypto pages. Continuity, one relationship, one fee conversation. | Varies enormously, and this is the whole reason to ask rather than assume. The four mechanics to test are token-to-token disposals, pooling with a pooled cost per type, the same-day rule and the 30 day rule. A practice that has not met them will not volunteer that. | Usually you, handing over exports. Expect to be asked for less than the position actually needs unless the practice has done this before. | Shared in practice, yours in law. The return is yours. | Often folded into the existing engagement, which is the attraction and also why the scope is frequently under-specified. |
| A specialist crypto accountant Active trading, multiple wallets and exchanges, or anything with judgement in it | A practice that does this work regularly and has met the awkward cases before, which is the actual product: pattern recognition rather than access to different rules. | Should be assumed only after asking. The test is not whether they say yes but whether they explain the mechanics back to you unprompted, including which of your transactions are disposals you had not counted as disposals. | Collaborative. They will tell you what they need, which is usually more than you expect and always includes wallets you had forgotten. | Yours in law, with professional advice behind your position, which matters if it is ever examined. | Transaction count, the number of exchanges and wallets, and above all the state of the records. Reconstruction is the expensive part, not the return. |
| A specialist, for DeFi, staking or mining Anything where income tax and capital gains both arise and the boundary between them is the question | The same specialist work applied to arrangements where the character of a receipt is itself in issue, and where the answer changes what tax applies rather than only how much. | This is the level at which the four basic mechanics stop being sufficient. HMRC's Cryptoassets Manual is the published starting point, and the manual is long because the arrangements are. | Collaborative and heavier. On-chain activity does not export as cleanly as an exchange history, and reconstructing it later is materially harder. | Yours, and higher, because more of the position depends on characterisation rather than on arithmetic. | Highest, driven by the analysis rather than the volume. Note one specific point from HMRC guidance: the costs of mining activities are not deductible against a capital gain. |
How these were chosen, how they are ordered, and why no firm is named
Five ways of getting the work done rather than five named firms. A directory of crypto accountants dates within months, cannot be verified by a reader and is dominated by whoever is willing to pay for a listing. What does not date is what the work requires, which is set by HMRC's published rules and is the thing to test a candidate against.
Every requirement stated here is quoted from HMRC guidance on gov.uk, read on 15 August 2026, and from HMRC's own Cryptoassets Manual. Nothing is taken from a firm's marketing, because a firm's account of its own capability is exactly what a prospective client is trying to verify independently.
Order runs from doing it yourself to a specialist practice, which is roughly the order of cost and exactly the order of how much of the mechanics somebody else absorbs. It is not a ranking: a straightforward holding sold once is genuinely a self-assessment job, and paying specialist fees for it is money spent on reassurance.
No fee appears anywhere on this page. Accountancy fees are set by firms and vary with transaction count, the number of exchanges and wallets involved and the state of the records, so a range invented here would anchor a reader on a number describing nobody. What the table gives instead is what drives the fee, which is what a quote is actually pricing.
This page is not tax advice and does not tell you what you owe. It sets out what the work requires so that a conversation with an adviser starts from the right questions.
- Do it yourself gov.uk, check if you need to pay tax when you sell cryptoassets
- Crypto tax software, then self-file gov.uk, check if you need to pay tax when you sell cryptoassets
- Your existing accountant HMRC Cryptoassets Manual
- A specialist crypto accountant HMRC Cryptoassets Manual
- A specialist, for DeFi, staking or mining HMRC Cryptoassets Manual
Crypto Accountants Directory is an independent site operated by Ellul Solutions Ltd. It is not affiliated with, endorsed by or connected to HM Revenue and Customs, any professional body or any accountancy practice, and it is not an accountant or a tax adviser. Nothing here is tax advice and no page on this site tells you what you owe. We name no firm in either direction, take no commission and carry no paid placements, and we publish no fee, hourly rate or software price anywhere, because no authority publishes a benchmark and a range invented here would describe nobody. Every rule stated is quoted from HMRC guidance cited on this page and read on the date shown at the top of it. UK tax rules move on the April cycle, so check that date before relying on anything here.
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What HMRC's cryptoasset rules require, and what to ask an accountant, 2026
Last updated
A crypto accountant is being hired to apply a small number of published rules correctly across a large number of transactions. These are the rules, each paired with the question that tests whether a candidate has met it before.
Every rule in this table is quoted from HMRC guidance on gov.uk, read on 15 August 2026, with the Cryptoassets Manual cited as the fuller published source. Where the table states what a cost cannot be, that follows HMRC's own list of costs that may not be deducted. No fee, hourly rate or software price appears anywhere: accountancy fees are set by firms and vary with transaction count, the number of exchanges and wallets and the state of the records, and no authority publishes a benchmark. The questions in the fourth column are ours, derived from the rule beside them, and are offered as a way of testing capability rather than as a professional standard. This is not tax advice and does not tell any reader what they owe. Tax rules change on the UK's April cycle, so the date at the top of this page is the date these rules were read.
| The rule | What HMRC says | Why it catches people | The question to ask an accountant |
|---|---|---|---|
| Disposal is wider than selling | You may need to pay Capital Gains Tax when you dispose of tokens, and disposal includes selling them, exchanging them for a different type of cryptoasset, using them to pay for goods or services, and giving them away other than to a spouse, civil partner or charity | A token-to-token trade with no pounds involved feels like a reallocation and is a disposal. So is paying for something with tokens | Which of my transactions are disposals that I have not counted as disposals? |
| Pooling | You must group each type of token you own into pools and work out the pooled cost for each type | It is not first in, first out and it is not per purchase. The pooled cost changes with every acquisition, which is why manual working goes wrong at volume | How do you compute the pooled cost, and can you show me the working for one token? |
| The same-day rule | Pooling does not apply where you buy tokens on the same day that you sell tokens of the same type | It sits outside the pool entirely, so a day-trading pattern is not a pooling calculation at all | How do you handle same-day acquisitions and disposals? |
| The 30 day rule | Pooling does not apply where you buy tokens within 30 days of selling tokens of the same type | Selling and rebuying to realise a loss does not work the way people expect, and the matching is automatic rather than optional | How do you handle a repurchase inside 30 days, and what does it do to a loss? |
| Working out the gain | Your gain is normally the difference between what you paid for an asset and what you sold it for, and you may deduct allowable costs such as transaction fees and valuation expenses | Fees are deductible and are routinely left out, particularly network fees paid in the token itself | Which of my fees are you treating as allowable costs? |
| Costs you cannot deduct | Costs already deducted against profits for Income Tax cannot be deducted again, and the costs of mining activities are not deductible | Anybody who mined and then sold reaches for the equipment and electricity, and that is the specific case the rule excludes | If I mined any of this, how are you treating those costs? |
| Records | You must keep separate records for each transaction, including the type of tokens, the date you disposed of them, the number of tokens disposed of and their pound sterling values | Per transaction, in sterling, at the time. Exchanges close, accounts are lost and history stops being downloadable | What records do you need from me, and what do I do about the exchange that no longer exists? |
| The pound sterling valuation | Values are recorded in pound sterling | A token-to-token trade has no sterling amount in it, so a value has to be established for both sides at the moment of the trade | How do you value a token-to-token disposal, and what source do you use? |
- Exchanging one type of cryptoasset for a different type is a disposal for UK Capital Gains Tax, so a trade with no pounds involved can produce a tax charge.
- Using tokens to pay for goods or services is also a disposal, and so is giving them away other than to a spouse, civil partner or charity.
- You must group each type of token you own into pools and work out the pooled cost for each type, which is neither first in first out nor a per-purchase calculation.
- Pooling does not apply where you buy tokens on the same day that you sell tokens of the same type.
- Pooling also does not apply where you buy tokens within 30 days of selling tokens of the same type.
- Allowable costs include transaction fees and valuation expenses, and network fees paid in the token itself are routinely omitted.
- Costs already deducted against profits for Income Tax cannot be deducted again, and the costs of mining activities are not deductible against a capital gain.
- HMRC requires separate records for each transaction, including the token type, the disposal date, the number of tokens and their pound sterling values.
Cite this page
“What HMRC's cryptoasset rules require, and what to ask an accountant, 2026”, Crypto Accountants Directory, https://cryptoaccountantsdirectory.co.uk/ (updated 2026-08-15). Every rule in this table is quoted from HMRC guidance on gov.uk, read on 15 August 2026, with the Cryptoassets Manual cited as the fuller published source. Where the table states what a cost cannot be, that follows HMRC's own list of costs that may not be deducted. No fee, hourly rate or software price appears anywhere: accountancy fees are set by firms and vary with transaction count, the number of exchanges and wallets and the state of the records, and no authority publishes a benchmark. The questions in the fourth column are ours, derived from the rule beside them, and are offered as a way of testing capability rather than as a professional standard. This is not tax advice and does not tell any reader what they owe. Tax rules change on the UK's April cycle, so the date at the top of this page is the date these rules were read.
The detail
Each one cites where its numbers come from.
What counts as a crypto disposal in the UK
Selling is the obvious one. Exchanging one token for another, paying for something with tokens and gifting are all disposals too, and that is where returns go wrong.
Pooling, the same-day rule and the 30 day rule
The arithmetic that decides a crypto gain, and the reason a spreadsheet built from an exchange export usually gets it wrong.
The records HMRC expects you to keep
Per transaction, in sterling, at the time. What that means when an exchange has closed, and why reconstruction is the expensive part of the fee.
Eight questions for a crypto accountant, before the fee conversation
Each one comes from a published HMRC rule, and each has an answer that a practice which has done this work gives without hesitating.
The questions we get
Do I need a crypto accountant in the UK?
Not for a simple position. A single holding bought and sold in pounds with a complete record is a self-assessment job and HMRC publishes the rules to do it. What pushes people towards a specialist is volume, multiple exchanges and wallets, token-to-token trading, and anything involving staking, mining or DeFi where the character of a receipt is itself in question. The filter worth applying is capability rather than fee: ask about token-to-token disposals, pooling, the same-day rule and the 30 day rule.
Is swapping one crypto for another taxable in the UK?
Yes. HMRC guidance states that disposing of tokens includes exchanging them for a different type of cryptoasset, so a swap is a disposal of the first token even though no pounds were involved. The gain is computed against the pooled cost of what you gave up, valued in sterling at the moment of the trade. This is the single most commonly missed item in UK crypto tax returns, because a swap feels like a reallocation rather than a sale.
How does crypto pooling work for UK tax?
HMRC requires you to group each type of token you own into pools and work out the pooled cost for each type. So there is one running pooled cost per token type rather than a cost attached to each purchase, and a disposal takes a proportionate slice of it. It is not first in, first out, and applying that instead produces a plausible but wrong gain. Two rules sit outside the pool: same-day acquisitions, and repurchases within 30 days of a sale of the same type.
What is the 30 day rule for crypto in the UK?
Pooling does not apply where you buy tokens within 30 days of selling tokens of the same type. The disposal is matched against that acquisition directly rather than against the pool. The practical consequence is that selling at a loss and rebuying shortly afterwards does not produce the result people expect, and the matching is automatic rather than something you elect into. If crystallising a loss is part of a plan, the rule needs applying to that plan in advance.
What records does HMRC expect for cryptoassets?
Separate records for each transaction, including the type of tokens, the date you disposed of them, the number of tokens disposed of and their pound sterling values. Per transaction and in sterling, which matters because a token-to-token trade contains no sterling figure and one has to be established for the moment of the trade. Records decay: exchanges close, download windows expire and wallets are lost, so exporting full histories from every venue now is worth an hour whatever you decide to do about filing.
Can I deduct my mining costs against a crypto gain?
No. HMRC's guidance on costs that cannot be deducted names the costs of mining activities specifically, alongside costs already deducted against profits for Income Tax. This is worth knowing because equipment and electricity are the first things somebody who mined reaches for. What is allowable includes transaction fees and valuation expenses, and network fees paid in the token itself are commonly left out of a calculation when they should be included.
What does a crypto accountant cost in the UK?
We publish no figure, because no authority sets or publishes one and fees vary enormously. The three things that actually drive a quote are the transaction count, the number of exchanges and wallets involved, and above all the state of the records: reconstruction is the expensive part of this work, not the return. That is also why exporting complete histories before engaging anybody reduces the fee, and why the exchange that closed two years ago is the most expensive line in the engagement.
Sources
Compare on capability, then on fee
Five ways to get the work done, on what each handles, who assembles the records and what drives the cost.