Koinly is a web-based crypto tax and portfolio service for people who hold digital assets and need to report them at tax time. It is aimed at individual investors, active traders and anyone who wants a clearer picture of gains, losses and income across their accounts.
Koinly for Windows is not a separate download. You use the service in a browser on your Windows PC, and it also has a mobile version, so you can check records away from your desk. If you want tax reports without installing software, this model is worth understanding before you sign up.
What Is Koinly and Who Is It For?
Koinly sits in the portfolio and tax category. It gathers your crypto transactions and turns them into figures you can use when filing. Individual investors who buy, sell, swap or receive tokens over several years tend to find it most useful, since spreadsheets become hard to maintain once the transaction count grows.
It is also relevant for people who use more than one exchange or wallet. Spreading activity across platforms makes it easy to lose track of cost basis, the price you paid for an asset, which determines the gain or loss when you dispose of it. A tool that consolidates records reduces that risk.
Freelancers and small traders with occasional activity can use it too. They should compare the cost of paid plans against the volume of their transactions before committing, since a light year of activity may not justify a subscription.
How Crypto Tax Calculations Work
Most crypto tax software follows a simple chain: collect transactions, assign a cost basis to each acquired unit, then match disposals against those acquisitions. The result is a realized gain or loss for each sale, swap or spend event.
The matching method matters. First in, first out (FIFO) assumes the oldest units are sold first, while average cost pools purchases together. Some jurisdictions prescribe a method, and others let you choose. The same set of transactions can therefore produce different results depending on the rules that apply to you.
Fees, transfers between your own wallets and income such as staking rewards each need careful treatment. A transfer is not a sale, but a fee paid in crypto may reduce your gain. Good records and clear labels make the final report far easier to check.
Real-World Scenarios Where Tax Software Helps
Consider someone who bought Bitcoin in several purchases over two years, moved part of it to a hardware wallet, sold a portion on an exchange and swapped the rest for another token. Tracking each step by hand is possible, but errors creep in quickly when dates, fees and prices are recorded in different places.
Another common case is a user who receives small rewards every week. Each reward can count as income at its value on the day received, which makes a long list of tiny entries. Software that imports that history in bulk saves hours compared with building a table from scratch.
Finally, people who move to a new country or change tax residence often need to recalculate a year under different rules. Having all transactions in one place makes that comparison faster, though the final interpretation still belongs with a qualified tax adviser.
Key features
Tax reports for many countries
Imports by API and CSV
How to install Koinly on Windows
- 1
Open the official website
Go to koinly.io in your Windows browser. There is nothing to install, because the service runs on the website. Check that the address is exactly koinly.io and that the connection uses HTTPS before you sign in.
- 2
Create an account
Sign up with your email address and follow the on-screen prompts. If a free option is available, start there to see how the interface handles your transactions before you choose a paid plan.
-
Import your transactions
Upload your CSV files or connect through the API where available. Review the imported records before generating any report, since missing or duplicated entries will change the results.
How to use Koinly
Koinly works in the browser, so the workflow is about preparing your data and checking results. Follow these steps once your account is open.
- Sign in at koinly.io and confirm you are on the official site.
- Export transaction histories from each exchange or wallet you used as CSV files.
- Upload the files through the import screen, or connect accounts through the API where that option is offered.
- Review the imported list for missing transfers, duplicate entries and wrong dates or currencies.
- Check how fees and transfers between your own wallets have been labeled, and correct any that are wrong.
- Choose the tax year and jurisdiction, then generate the report.
- Compare the totals with your own records before using them for filing, and save a copy of each report.
Pros & cons
- Runs in a browser on Windows, with no program to install
- Covers tax reporting for many countries
- Supports both API connections and CSV imports
- Free and paid options let you start small
- No native Windows application, so you depend on a browser
- Needs an internet connection to reach your records
- Some features may depend on the paid tier, so check plan details first
- Your records sit with a third-party service, which some users prefer to avoid
Is Koinly safe?
Koinly handles financial records, and some setups involve API keys, so treat it with the same care as a bank login. Open the site by typing koinly.io directly or from a bookmark you created yourself, and check the address before entering credentials. Turn on two-factor authentication if the account offers it.
When you connect an exchange, create a read-only API key where the exchange supports it, and never grant withdrawal permissions. No legitimate tax service should ask for your seed phrase or private keys. Treat any such request as a scam. Because this is a web service rather than an installed program, there is no installer checksum to verify. Use only the official website and check its latest details before you share any data.
- Official source only. Download from koinly.io. Ignore ads and lookalike domains.
- Check the SHA-256. Compare the installer hash with the value the developer publishes before running it.
- Never share your seed phrase. No developer, support agent or website — including CryptApps — will ever ask for it.
Alternatives
Koinly sits closer to tax reporting than general tracking. CoinTracking covers a similar tax-focused web workflow, so compare how each handles your jurisdiction and import options. CoinStats is a portfolio tracker on web and mobile, which suits people who want to watch prices and holdings more than file taxes.
Vovsoft Cryptocurrency Tracker is a desktop application for rates and charts. It does not replace tax reporting, but it can complement a browser-based tool. If you specifically want a native Windows program, Koinly is not that option, and you may need to pair a desktop tracker with a separate tax solution.
Specifications
- Price
- Free / paid plans
- Type
- Web service
- License
- —
- Latest version
- —
- Last update
- —
- Windows support
- No (web or mobile only)
- Official site
- koinly.io
Frequently asked questions
No, Koinly is not a Windows application. It is a web service, so you use it in a browser on your Windows PC. There is no installer to run, and you sign in at koinly.io like any other website. A mobile version also exists for checking records away from your desk.
Koinly offers both free and paid options, so you can test the service before paying. Which features are included in each plan can change, so check the pricing details on the official site before subscribing. Paid plans tend to make more sense when you have many transactions or need reports covering several years.
Koinly can be used safely if you take basic precautions. Sign in only at the official website, enable two-factor authentication where offered, and use read-only API keys with no withdrawal rights. Never share a seed phrase or private key with any tax service, because legitimate services do not need them to calculate your taxes.
You can import transactions in two ways: by uploading CSV files or by connecting through the API. Many users combine both, using the API where it is available and CSV exports for other accounts. Review the imported records before generating reports, since missing or duplicate entries change the results.
Yes, Koinly offers tax reports for many countries. Rules differ widely, though, covering how gains are calculated, holding periods and which events are taxable. Confirm that the reports match your local requirements, and consider a tax professional for complex situations such as multiple residences or business income.
Koinly is primarily a tax and portfolio service, so it tracks holdings alongside tax data. If you mainly want price charts and quick balance checks, a dedicated tracker such as CoinStats may suit you better. Many people use one tool for daily tracking and another for year-end reporting.
Cost basis is the amount you paid for a digital asset, including fees, and it sets the gain or loss when you sell or swap it. Tax software uses it to calculate what you owe. Methods such as first in, first out differ by country, so the same transactions can produce different results.
Verdict
Koinly suits individual investors and traders who need crypto tax reports without installing software on Windows. It is a browser-based service with API and CSV imports and reports for many countries. The free and paid options let you test it on a small history before committing. If you want a native desktop application, look at alternatives such as Vovsoft Cryptocurrency Tracker for rates, or pair a desktop tracker with a separate tax tool.