TL;DR: Koinly is one of the easier crypto tax tools to recommend for UK investors with accounts spread across several exchanges, wallets, and chains. It supports 1,000+ integrations, lets you preview gains before paying, and produces UK-focused tax reports that apply HMRC rules such as Share Pooling. The catch is that complex DeFi activity can still need manual cleanup, and pricing rises with transaction volume. Koinly currently earns 4.5/5 on Trustpilot from more than 2,300 reviews, while G2 and Capterra show perfect scores from much smaller samples. Rewardio currently offers 10% cashback on eligible Koinly plan purchases, with no code needed.
Crypto tax can get complicated fast. Managing one exchange is usually straightforward, but once you add hardware wallets, DeFi protocols, staking rewards, NFTs, and years of trading history, keeping track of everything in a spreadsheet becomes much more work.
That is the problem Koinly tries to solve. It pulls transactions into one place, calculates gains and income, and produces tax reports for your country. This Koinly review looks at the documented feature set, pricing, user feedback, and the limits you should know before paying.
What is Koinly?
It is crypto tax and portfolio-tracking software for investors, traders, and accountants. Koinly says it now serves more than 2 million users across 140+ countries. It also claims support for more than 50,000 coins and 1,000+ integrations.
For UK users, the main attraction is tax reporting. Koinly can calculate capital gains, losses, and crypto income, then create an HMRC-focused report. It applies UK Share Pooling rules, including same-day and 30-day matching.
Koinly does not hold your crypto and it is not an exchange. It also does not replace an accountant or give personal tax advice. Think of it as a calculation and record-keeping layer between your crypto accounts and your tax return.
Koinly key features
1. Broad exchange, wallet, and blockchain support
Koinly advertises more than 1,000 integrations across exchanges, wallets, blockchains, and crypto services. Its UK site highlights support for popular platforms such as Coinbase and Kraken.
You can connect supported services through an API or import CSV files. Public blockchain wallets can often sync using a public address or extended public key. Koinly says it supports API syncing for more than 200 blockchains.
That breadth matters if your history sits in several places. It reduces the amount of data you need to combine manually.
2. Koinly crypto tax calculations for the UK
The core Koinly crypto tax feature is its calculation engine. It pulls transaction history, assigns values, matches transfers, and works out taxable gains or income.
For UK investors, Koinly supports HMRC Share Pooling. It also accounts for same-day and 30-day matching rules. You can generate a tax report for your accountant or use the figures when preparing Self Assessment.
Koinly also handles common crypto activity such as mining, staking, lending, airdrops, DeFi transactions, and NFTs. That does not mean every imported transaction will be classified perfectly, especially with complex DeFi.
3. Free portfolio and tax preview
You can start on Koinly without buying a tax plan. The free tier lets you import up to 10,000 transactions, track your portfolio, and preview capital gains.
This is one of Koinly’s better selling points. You can connect your accounts and inspect the numbers before paying to download a report.
The dashboard also shows holdings and portfolio performance. Koinly includes tax optimisation tools that can help surface unrealised gains and losses.
4. Reconciliation and transaction editing
Crypto imports are rarely perfect. Koinly includes balance checks, warnings, transaction filters, bulk editing, transfer matching, and tools for fixing missing cost basis data.
You can also edit automatically created transactions. That becomes important when an exchange API omits old records or labels activity incorrectly.
Koinly itself warns that some exchange APIs do not provide complete transaction histories. In those cases, you may need CSV files or manual corrections.
5. Security and account access
Koinly says it holds SOC 2 and ISO 27001 certifications and complies with GDPR. The company also uses read-only connections when importing supported exchange data.
That is reassuring, but users should still treat their Koinly login like any other financial account. Use a unique password and review the security options available in your account.
Koinly pricing
Koinly’s pricing depends on the tax year you need and the number of transactions in your account. Its public pricing page currently lists Newbie at $49 for up to 100 transactions. Hodler costs $99 for up to 1,000, while Trader starts at $199 for 3,000 transactions. Higher-volume users have additional options.
The free plan covers up to 10,000 transactions, but it does not let you download tax reports. Paid plans unlock downloadable reports for the tax year you purchase.
One important detail is that Koinly plans are not subscriptions. You pay for the tax years you need. Koinly says it will not automatically charge you for the following year’s plan.
For a closer look at every tier and the transaction rules, see Rewardio’s Koinly pricing guide.
Koinly pros
1. Excellent coverage for scattered portfolios
Koinly’s biggest strength is coverage. More than 1,000 integrations give it a good chance of supporting the exchanges and chains you already use.
2. You can inspect your tax position before paying
The free plan is genuinely useful. It lets you import a large transaction history and preview gains before you buy a report.
3. UK tax support is built around HMRC rules
Koinly is not just a generic capital gains calculator. Its UK reporting supports Share Pooling, same-day matching, and the 30-day rule.
Where Koinly falls short
1. Complex DeFi still needs human review
Automation has limits. Bridging, liquidity pools, wrapped assets, unusual staking setups, and unsupported protocols can create transactions that need manual correction.
This is not only a Koinly problem, but it matters. A tax report is only as reliable as the transaction history behind it.
2. Pricing can climb quickly for active traders
A few hundred trades can become thousands of imported transactions. That can push an active user into a higher plan.
Koinly also considers account-wide transaction limits when deciding which plan you need. Its help centre explains that older activity can affect the plan required for a newer tax year.
3. Import quality depends on third-party data
Koinly cannot import information that an exchange does not expose. Its own documentation notes that some APIs return incomplete transaction histories.
You may have to combine API syncs, CSV imports, and manual edits. That reduces the time-saving benefit for messy or very old portfolios.
Koinly reviews: what users actually say
The broadest public feedback comes from Trustpilot. At the time of research, Koinly held a 4.5/5 TrustScore from more than 2,300 Koinly reviews. Around 85% were five-star reviews.
Positive comments often focus on ease of use, tax reporting, and helpful support. Recent negative feedback points to sync errors, incorrect balances, and delays when a case needs human help.
G2 paints an even more positive picture, but the sample is tiny. Koinly has a 5.0/5 rating there from only two reviews. Reviewers praised the interface and exchange integrations, while one older review criticised NFT handling.
Capterra UK also shows 5.0/5, but from only one review. That reviewer liked Koinly’s ability to track crypto cost basis across exchanges and advised users to check exchange support first.
The sensible takeaway is not that Koinly is universally perfect. Trustpilot gives us the most useful sample. It shows strong satisfaction, alongside a noticeable minority reporting import or support problems.
Koinly vs CoinTracker
Koinly vs CoinTracker is a common comparison because both combine crypto portfolio tracking with tax reporting.
Koinly currently promotes 1,000+ integrations. Koinly’s own 2026 comparison lists CoinTracker at 600+. CoinTracker says it supports tax calculations for more than 100 countries, including comprehensive UK reports.
Their pricing models differ too. Koinly sells plans for specific tax years and does not auto-renew them. CoinTracker moved to annual subscriptions, and it says those subscriptions auto-renew.
Koinly is the more obvious fit if you value a generous free preview and broad integration coverage. CoinTracker may suit users who prefer an ongoing subscription with year-round tax and portfolio features.
Do not choose on feature tables alone. Import your real transaction history into the free options first. If neither fits, Rewardio’s guide to Koinly alternatives covers other routes.
Who Koinly is for, and who should skip it
Koinly makes the most sense for people who have crypto activity across several wallets, exchanges, or chains. It is also useful for investors who want an accountant-ready record without building a spreadsheet from scratch.
UK users get particular value from the HMRC-focused reporting. People with staking, mining, NFTs, or moderate DeFi activity should also find useful tools here.
Skip it if your crypto history is tiny and easy to calculate manually. Heavy DeFi users should also be cautious. If much of your activity uses obscure protocols, expect more reconciliation work.
You should also consider an accountant if your tax position involves large sums, business activity, residency questions, or unusual transactions.
Ease of use and getting started
Getting started is straightforward on paper.
1. Create your account from the Koinly login page and set your home country and currency.
2. Add every exchange, wallet, and blockchain account you used.
3. Choose API sync, public address sync, or CSV import where available.
4. Review warnings, missing costs, unmatched transfers, and balances.
5. Check your tax summary before buying a plan.
6. Purchase the right tax-year plan and download the report you need.
Koinly’s own setup guide follows much the same process. It recommends adding every wallet or exchange and using API connections where suitable.
The fourth step deserves the most attention. Do not treat a successful import as proof that every transaction is correct.
How Koinly cashback works with Rewardio
Rewardio currently offers 10% cashback on Koinly. No code is needed.
Start from the Koinly cashback page on Rewardio and activate the offer before going to Koinly. If you make an eligible purchase, Rewardio earns a commission from Koinly and passes a share back to you as cashback.
The useful part is that the 10% rate applies to eligible plan purchases made through Rewardio, including later tax-year plan purchases. It is not restricted to your first Koinly plan.
Koinly itself does not automatically renew tax plans. That means you should activate Rewardio cashback again when you return to purchase another tax-year plan.
Cashback tracking depends on the purchase tracking correctly. Follow Rewardio’s instructions and avoid switching devices or referral paths during checkout.
Koinly FAQ
What is Koinly?
Koinly is crypto tax and portfolio tracking software. It imports transaction data, calculates gains and income, and generates tax reports for supported countries. UK reports account for HMRC crypto tax rules.
Which type of company is Koinly best for?
Koinly works well for crypto investors, traders, accountants, and small firms that need organised transaction records. It is especially useful when activity spans several platforms.
It is not business accounting software. Companies with complex corporate tax needs should involve a qualified accountant.
How does Koinly work?
Koinly imports transactions from exchanges, wallets, and blockchains. It then matches transfers, applies market prices, calculates cost basis, and separates gains from income.
You review the imported data and fix any errors. A paid plan then lets you download the relevant tax reports.
How do I connect Koinly to other apps?
Koinly connects to many exchanges and services through APIs. It also supports blockchain addresses, extended public keys, and CSV imports.
The exact method depends on the service. If an API lacks older data, a CSV import may provide a more complete history.
Why use Koinly?
Use Koinly if manual crypto tax tracking has become too time-consuming or error-prone. Its main appeal is putting scattered activity into one tax-focused record.
The free preview also lowers the risk of paying too early. You can inspect your portfolio and estimated tax position before buying a report.
Koinly review verdict
Koinly gets the fundamentals right. It supports a wide range of crypto platforms, gives UK users HMRC-focused calculations, and lets you inspect much of the result for free.
The weak point is the same one that affects most crypto tax software. Complex transaction histories still need careful review, and high transaction counts increase the price.
For the current offer, visit Koinly on Rewardio and activate the 10% cashback before purchasing an eligible plan.
This article is for general information only and does not provide tax, legal, investment, or financial advice. Crypto tax rules depend on your circumstances and can change. Check current HMRC guidance and speak with a qualified tax professional if you are unsure how to report your activity.
