Crypto Reconciliation Services UK
Crypto records can become a mess fast. One wallet does not sync. An exchange report is missing. A software dashboard shows a negative balance, even though you know that cannot be right. It is stressful, especially when tax deadlines are close.
Crypto reconciliation is the process of turning scattered transaction data into clear, checked, HMRC-ready records. We help you clean up wallet, exchange, custodian, and blockchain transaction records so your crypto accounting is accurate, compliant, and ready for review.
Cross-chain swaps, failed API imports, DeFi activity, and closed platforms such as FTX or Celsius can leave large gaps in your ledger. We step in to find the missing pieces, match the data, and rebuild the full picture.
Book a Crypto Data ReviewWhy Your Crypto Tax Software is Showing Errors
Crypto tax software is useful, but it can only work with the data it receives. When a wallet, exchange, blockchain, or custodian sends incomplete information, the software starts guessing. That is when you see warnings, missing cost basis errors, or strange balances. Tools like Koinly, Recap, and CoinTracker can automate many tasks, but they cannot always understand the full story behind each transaction. Human review is often needed to reconcile crypto records properly and ensure accuracy.
1. Broken Wallet API Syncs & Missing Cost Basis
A broken wallet API can make your crypto accounting look worse than it is. MetaMask, Binance, Coinbase, or other platforms may fail to import old transaction data correctly. When purchase costs are missing, software may treat a digital asset as if it was received for free. That can create “ghost gains” and a higher tax figure. We check wallet records, exchange files, and blockchain transactions to rebuild the missing cost basis and align your ledger.
2. Untracked DeFi Liquidity Pools & Smart Contracts
DeFi activity can confuse standard tax software because many actions do not look like simple buys or sells. Adding funds to a Uniswap liquidity pool, borrowing through Aave, bridging crypto across blockchains, or interacting with smart contracts can create several linked entries. One transaction may trigger many smaller events. If these are not matched correctly, your balance can look wrong. We review DeFi records manually and reconcile the transaction data with the real activity.
3. Lost Transaction History from Closed Exchanges
Closed exchanges can cause serious gaps in crypto records. If you traded on FTX, Celsius, BlockFi, or another failed platform, you may no longer have easy access to complete reports. That does not mean the records are gone forever. Blockchain data, bank statements, emails, and old downloads can still help rebuild the history. We trace the movement of cryptocurrencies, match deposits and withdrawals, and create a cleaner audit trail for HMRC.
The Danger of Unreconciled Crypto Data with HMRC
Unreconciled crypto data is not just a technical issue. It can become a compliance risk. If your tax return is based on missing or wrong transaction data, HMRC may see a difference between your return and the records they receive from exchanges. That discrepancy can lead to questions, checks, or an audit. It is safer to reconcile your crypto transactions before filing, rather than explain errors later after HMRC contacts you.
Automated Reporting (CARF) & HMRC Nudge Letters
Under the Cryptoasset Reporting Framework, crypto exchanges are moving towards wider reporting of user transaction files to tax authorities, including HMRC. This means your exchange activity may be compared against your tax return. A “best guess” return is risky when records are messy.
HMRC penalties can be serious. In some cases, penalties may reach 70% to 100% of the tax due, especially where errors are not corrected properly.
Voluntary disclosure can reduce exposure. Clean records help you explain your position with confidence.
How Our Crypto Reconciliation Process Works
Our crypto reconciliation process is built to make messy records usable. We do not rely on one software export and hope it is right. We extract data, test it, compare balances, and make manual corrections where needed. The aim is simple: a clean ledger that reflects what actually happened. From there, we can prepare HMRC-compliant crypto accounting reports for capital gains, income, losses, and supporting audit evidence.
Phase 1: Full Transaction History Extraction
Extract every available record from wallets, exchanges, custodians, and blockchain explorers. We gather CSV files, API reports, public wallet data, bank movements, and old downloads where available. This includes bitcoin, other cryptocurrencies, DeFi platforms, and exchange activity. The goal is to create one full transaction history, not several broken lists. Once the data is collected, we organise it into a working ledger for review.
Phase 2: Discrepancy Matching & Manual Adjustments
Audit the records line by line where the software cannot explain a difference. We match deposits, withdrawals, swaps, failed imports, bridge transfers, fees, and internal movements between wallets. If a balance does not align, we find the cause. Sometimes one missing transaction creates twenty warnings. Manual adjustments help remove false gains, fix missing cost basis figures, and make the final crypto reconciliation more reliable.
Phase 3: HMRC-Compliant Capital Gains Calculations
Compute the tax results using UK crypto rules, including Share Pooling and the Bed & Breakfast rules. This step turns the cleaned ledger into capital gains calculations, income summaries, and supporting reports. We separate taxable disposals from non-taxable transfers where the evidence supports it. The final output is designed to be clear, compliant, and ready for your tax return or adviser review.
Who Needs Crypto Reconciliation?
Crypto reconciliation is useful for anyone who has more than a few simple exchange trades. The more wallets, chains, and platforms you use, the easier it is for records to drift apart. A small discrepancy can grow over several tax years. If your software shows warnings, missing balances, or strange gains, do not ignore it. Reconcile the data before you file, especially if HMRC deadlines are close.
- Active crypto traders: If you trade often across Binance, Coinbase, Kraken, or other exchanges, your transaction volumes can become hard to manage. Even simple buy and sell activity can create errors when fees, transfers, and exchange rate data are missing. Reconciliation helps align every transaction so the final tax report reflects the real movement of your crypto.
- DeFi users: If you use liquidity pools, staking, lending, borrowing, bridges, or smart contracts, standard software may not classify every event correctly. DeFi can create complex records across several blockchains. A manual review helps separate income, disposals, fees, and transfers, so your crypto accounting does not rely on rough guesses.
- Investors with old or missing exchange data: If you used a closed exchange or lost access to old reports, you may still need those records for HMRC. We can rebuild missing transaction history using wallet addresses, blockchain explorers, bank statements, and available evidence. This is especially useful when a missing cost basis causes inflated gains.
- Businesses holding digital assets: Companies that hold crypto need clear ledgers, accurate balances, and proper audit support. A custodian report alone may not explain every transaction. Reconciliation helps finance teams keep digital asset records clean, streamline reporting, and support compliance when accounts, tax returns, or internal reviews are prepared.
Ready to Turn Your Crypto Chaos into Tax Clarity?
Delaying crypto reconciliation usually makes the problem harder. More transactions arrive. More records go missing. More deadlines get closer. If your wallet, exchange, or software reports do not align, now is the time to fix them. Clean records reduce filing errors, support compliance, and make HMRC questions easier to answer. Start with a secure review of your data and get a clear path forward.
No obligation. 100% confidential under UK data laws.
What Our Clients Say About Us
Felix Group Contractors
“We wanted to add Bitcoin into our pool of business assets and the team at CT explained and implemented how we can achieve this for a very reasonable cost! Highly recommend especially if you are a Small UK based business looking to diversify cash holdings into bitcoin.”
Stephen Kelly
“Fast, accurate, affordable and efficient. Very impressed with the swift work carried out on my behalf. I will certainly be using them again in the future.”
Rowan Champney
“Crypto Taxation made my self-assessment filing stress free with a smooth transfer from my previous accountants. Their pricing is affordable, and the team is professional throughout. A special thanks to Jaden, who was a great help. Highly recommend!“
FAQs
Do I need a crypto accountant if I already use crypto tax software?
Yes, in many cases. Crypto tax software is a strong tool, but it depends on clean data. If the software has missing wallet records, broken exchange imports, or wrong cost basis figures, the result may be wrong. A crypto accountant can investigate ghost gains, negative balances, and missing transaction data. Proper crypto reconciliation helps make the software output more accurate and HMRC-ready.
What happens if I have lost my transaction history entirely?
Lost history can often be rebuilt. Blockchain transactions leave a public trail, so wallet addresses can be reviewed through blockchain explorers. We can also use bank statements, exchange emails, old CSV files, and partial records to rebuild the ledger. The aim is to create a reasonable, evidence-backed record that supports HMRC’s record-keeping rules. Crypto reconciliation is often possible even when the original exchange report is missing.
Can you help if I received an HMRC nudge letter about undisclosed crypto?
Yes. This is a common reason clients ask for help. We first reconcile the historical crypto records, then identify what may have been missed or reported incorrectly. Once the position is clear, we can guide you through the Digital Disclosure Service where needed. Accurate crypto reconciliation helps reduce uncertainty, explain discrepancies, and lower the risk of further penalties where voluntary disclosure is handled properly.
