When a client pays your invoice in Bitcoin, or your company holds Ethereum as a treasury asset, the accounting questions are specific: which account does it go in, how do you value it, and what happens when you dispose of it? For most founders, these are genuinely uncharted waters. This article gives you a clear map.
What is a blockchain — and why should accountants care?
A blockchain is a secure, distributed digital ledger: a record of transactions stored simultaneously across many computers (called nodes), rather than in one central location. Each block of records links cryptographically to the one before it, making the chain extremely difficult to alter retroactively. Transactions on the chain are visible to all nodes, meaning they can be verified by anyone — but not reversed without broad consensus.
The accounting relevance of this is significant. Ownership of assets on a blockchain is established publicly and provably. When your company holds cryptocurrency in a wallet, the entire transaction history of that wallet is recorded on-chain. An auditor — or an investor conducting due diligence — can verify the balance and movement history independently, without relying solely on your internal records. That is a fundamentally different evidential standard from a traditional bank account, where the bank statement is the sole authoritative record.
Beyond cryptocurrency, blockchain technology is being used to record ownership of other digital assets, track supply chain provenance, and build tamper-evident databases. For most founders today, however, the immediate accounting question is cryptocurrency: how it enters the books, how it is valued, and what happens when you move it.
How crypto holdings appear in company accounts
The UK does not yet have a dedicated accounting standard for cryptoassets. In practice, most UK accountants treat cryptocurrency held by a company as an intangible asset under applicable accounting standards (FRS 102 for most SMEs, or IFRS for larger entities). Here is what that means in practice:
| Scenario | Common accounting treatment |
|---|---|
| Company buys £10,000 of Bitcoin | Record as intangible asset at cost (£10,000) |
| Bitcoin value rises to £14,000 | No upward revaluation under the cost model; carrying value stays at £10,000 |
| Bitcoin value falls significantly | Write down to recoverable amount — impairment charge recognised in the P&L |
| Company sells Bitcoin for £13,000 | Remove asset at cost (£10,000); recognise £3,000 gain on disposal through the P&L |
| Company receives crypto as payment | Record at sterling fair value of crypto at the date of receipt |
The critical implication: crypto is not cash, and it is not a currency equivalent for accounting purposes. It cannot be netted against a bank balance, and fluctuations in its market value do not automatically flow through your P&L unless you test for impairment or realise a disposal. This surprises many founders who think of crypto as a liquid, cash-like asset.
On-chain payments: receiving and paying suppliers in cryptocurrency
Some founders actively transact in crypto — receiving client payments or paying suppliers in cryptocurrency rather than sterling. Each of these events has accounting and tax consequences that do not arise with conventional bank payments.
When your company receives payment in crypto, the transaction is recorded at the sterling equivalent value of the crypto at the time of receipt. Suppose you invoice a client for £5,000 and they settle the invoice in ETH. If the ETH is worth £5,200 on the day it arrives in your wallet, you record £5,200 of revenue and the excess £200 is treated as an exchange gain. If the ETH has fallen to £4,800, you record £4,800 and recognise a £200 loss.
When your company pays a supplier in crypto, you are disposing of an asset. Any difference between the carrying value of that crypto in your books and its sterling fair value at the date of disposal represents a gain or loss — and that gain or loss may be subject to corporation tax, regardless of whether any sterling has changed hands.
This is why many accountants advise founders to maintain a clear separation between a treasury wallet (long-term crypto holdings) and an operational wallet (used for day-to-day payments). Mixing the two creates a reconciliation burden that compounds with every transaction.
Reconciliation tools: automating the ledger
The transaction history of a crypto wallet is publicly visible on the blockchain — but translating it into double-entry journal entries for your accounting platform requires a reconciliation step. Doing this manually is tedious and error-prone, particularly for a wallet with frequent activity.
Specialist crypto-accounting connectors work by importing every transaction from a wallet address — including transfers in, transfers out, fees paid, and token swaps — and generating the corresponding accounting entries automatically. Those entries are then pushed to a cloud accounting platform, where they appear alongside your conventional bank transactions. The result is a single, consolidated view of the company's finances — crypto and fiat together — with a complete audit trail.
For the reconciliation tool to work correctly, it needs the cost basis of each crypto holding: what the company paid for it, or its fair value at the date it was received. This information must be captured at the time of acquisition. Attempting to reconstruct cost bases retroactively — especially across multiple wallets and token types — is significantly more expensive than recording them correctly from the start.
On-chain reconciliation also offers a strong audit trail: every transaction is immutably recorded with a public timestamp, and an auditor can cross-reference the platform's records directly against the blockchain — independently of any internal documentation.
The tax dimension: what HMRC expects
HMRC treats cryptoassets as a distinct asset class — not as foreign currency and not as securities. This has specific tax consequences for UK limited companies.
For corporation tax purposes, a company's gains on disposal of crypto holdings are chargeable to corporation tax on the profit (the difference between disposal proceeds and allowable cost). This is distinct from the treatment of individuals, where capital gains tax applies. Check the current rate and allowances directly on GOV.UK, as these change with each Budget.
For VAT purposes, cryptocurrency used as payment does not itself carry VAT — but the underlying goods or services being purchased remain subject to VAT as normal. Receiving crypto in exchange for a taxable supply does not exempt that supply from VAT.
HMRC expects companies to maintain records of all crypto transactions, including the sterling value at the date of each transaction. This record-keeping requirement is non-negotiable, and it reinforces why getting wallet reconciliation set up early — rather than attempting to reconstruct records years later for a tax return or HMRC enquiry — is the only practical approach.
For current HMRC guidance on the tax treatment of cryptoassets for businesses, go directly to HMRC's cryptoassets for businesses guidance on GOV.UK. The corporation tax landing page on GOV.UK is also a useful reference for understanding how chargeable gains on disposal fit within the broader corporation tax framework. Given the pace of regulatory change in this area, always verify the current position rather than relying on secondary sources. A qualified accountant with cryptoasset experience is a worthwhile investment for any founder whose business model involves material crypto activity.
For the accounting foundations that underpin everything in this article, see The accounting equation explained and Double-entry bookkeeping explained.
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Key takeaways
- A blockchain is a distributed, tamper-proof ledger; crypto holdings on-chain are publicly verifiable, giving auditors an independent evidential trail that supplements internal records.
- Under common UK accounting practice, cryptocurrency held by a company is recorded as an intangible asset at cost, tested for impairment, and disposed of at fair value — gains and losses flow through the P&L.
- Receiving or paying in crypto triggers a valuation event at the time of each transaction; the difference between carrying value and sterling fair value at disposal creates a taxable gain or loss for the company.
- Specialist wallet-to-ledger reconciliation tools can import on-chain transactions and post them to a cloud accounting platform automatically — but they need accurate cost-basis data from the point of acquisition.
- HMRC treats cryptoassets as a distinct asset class; corporation tax applies to a company's gains on disposal — verify the current position and rates on GOV.UK, as this area continues to evolve.
- blockchain
- cryptocurrency
- accounting-basics
- fintech