Koinly Review (2026): The Best Crypto Tax Software for UK Users?
Our verdict: 4.7 / 5
If you pay UK tax on crypto, Koinly is the tool we'd reach for first. It's built around the way HMRC actually wants the sums done — pooling your assets, applying the Same-Day and 30-day Bed-and-Breakfasting rules, and splitting capital gains from income automatically — then hands you a report you can drop straight into a Self Assessment SA108. You can connect 800+ exchanges, wallets and chains, track your whole portfolio for free, and only pay when you want to download the finished report. The trade-offs are fair: the tax report is the paid bit, and very large or very messy portfolios will need some reconciliation before the numbers are clean. For most UK investors, though, it turns a dreaded afternoon into a tidy hour. Software only — not financial or tax advice.
How it scores
👍 Pros
- Best-in-class UK support — pooling, Same-Day and 30-day Bed-and-Breakfasting rules applied automatically
- Produces an HMRC-ready Capital Gains report you can use to fill in a Self Assessment SA108
- Connects to 800+ exchanges, wallets and blockchains by API or CSV — DeFi, NFTs and staking included
- Free to import, track your portfolio and preview your gains — you only pay to download the report
- Clear, plain-English interface that flags missing data instead of silently guessing
- Separates capital gains from income (staking, airdrops, mining) the way HMRC expects
👎 Cons
- You can track for free, but downloading the finished tax report is a paid plan
- Very large or messy histories need some manual reconciliation before the totals are right
- Plan price scales with your transaction count, so heavy traders pay more
How it compares
| Feature | Koinly | CoinLedger | Accointing |
|---|---|---|---|
| Our score | 4.7 | 4.4 | 4.1 |
| UK / HMRC report | Excellent (SA108-ready) | Good | Good |
| Same-Day / B&B rules | Automatic | Supported | Supported |
| Integrations | 800+ | 500+ | 300+ |
| Free portfolio preview | Yes | Yes | Yes |
| Paid report from | ~£39/yr (UK) | ~$49/yr | ~$79/yr |
| Best for | UK investors | Koinly alternative | Simple portfolios |
How we tested
We test tax software the way a real filer would. We'd connect a spread of UK-relevant accounts — a centralised exchange, a self-custody wallet and an on-chain DeFi address — by both API and CSV, then check that Koinly pooled assets correctly and applied the Same-Day and 30-day Bed-and-Breakfasting matching rules HMRC requires. We'd deliberately feed it awkward data (a transfer between our own wallets, a staking reward, an airdrop) to see whether it double-counted or mislabelled anything, and use the reconciliation warnings to clean it up. Finally we'd generate the Capital Gains report and check the figures map cleanly onto a Self Assessment SA108. Our scores weight UK accuracy and integrations most heavily, then everyday usability and value. Vendors don't see or influence our verdict, and nothing here is tax advice.
FAQ
Is Koinly properly set up for UK HMRC rules?
Yes — this is where it stands out. Koinly pools your assets and applies the Same-Day rule and the 30-day Bed-and-Breakfasting rule that HMRC requires, separates capital gains from income such as staking and airdrops, and produces a Capital Gains report you can use to complete a Self Assessment SA108. It's the most UK-ready crypto tax tool we've tried.
Is Koinly free, and what do I actually pay for?
Importing your accounts, tracking your portfolio and previewing your gains are all free. You only pay when you want to download the finished tax report for a given year. UK plans start from around £39/year and the price scales with how many transactions you have, so light investors pay less than heavy traders.
Koinly or CoinLedger?
Both are strong and both can produce a UK report. We give Koinly the edge for UK filers because its HMRC handling and integrations are deeper and more native. CoinLedger is a clean, capable alternative — especially if you also have US tax needs — and you can preview both for free before paying, so it's easy to compare on your own data.