On this page
This page has a free calculator that estimates your Irish capital gains tax on crypto. Enter your gains and losses for a tax year and it applies the published 33% CGT rate after the €1,270 annual exemption. It is a quick estimate for one person and one year, designed to answer "roughly what do I owe?" before you do the detailed work.
Crypto capital gains tax estimator (Ireland)
Enter one tax year’s figures in euro. This is an estimate for a single person using the 33% CGT rate and the €1,270 annual exemption. It is not tax advice, and rates can change at a Budget.
Everything here was checked on 5 October 2026 against Revenue's pages. Budget 2027 is on 6 October 2026, so if the rate or exemption changes, the numbers above will need updating; check revenue.ie and the date at the foot of this page.
How to use it
Start with your net result, not your raw trades. The calculator works from the gain on each disposal, after you have already subtracted what the coins cost you and your allowable fees. If you are unsure how to get to that figure, our guide to capital gains tax on crypto shows the working with euro examples.
Enter your gains and, if you have them, your losses. Losses from the same year reduce the gain; allowable losses carried forward from earlier years can too, provided you reported them. The calculator then applies the exemption, which Revenue describes as the first €1,270 of your gain after deducting losses, and multiplies the rest by 33%. The result is an estimate of the CGT due, and the payment date depends on when the disposals took place: 15 December for 1 January to 30 November, 31 January for December. The dates are explained in our guide to reporting and paying crypto tax.
To sanity-check it, try the three scenarios from the CGT page. A €3,850 net gain should produce about €851.40; a €1,500 gain, €75.90; and a €2,500 net gain, €405.90. If your tool gives different figures for the same inputs, check the inputs before you blame the sums.
What the calculator assumes
It assumes the person using it is an individual, resident in Ireland, with a single tax year, and that the activity is investing, not trading. It uses the 33% rate that Revenue gives for most gains, and the personal exemption of €1,270. It does not know whether your activity amounts to a trade, in which case income tax applies instead of CGT, and it does not make that judgement for you.
What it does not do
It does not look at your wallets or exchange accounts, so it cannot find swaps you forgot. It does not value a transaction in euro, which you need to do from an exchange rate source, as Revenue's manual says to make a reasonable effort at an appropriate rate. It does not handle staking, airdrops, forks, mining or DeFi income (see our guide to those), gifts and inheritances that raise CAT, or the special rules for couples. It does not generate a Revenue form. And it cannot tell you whether a loss is allowable.
A spreadsheet method that works
For a modest number of transactions, a spreadsheet is more transparent than software, and it is easy to show an accountant or Revenue. One row per transaction, with these columns, is enough.
| Column | What goes in it |
|---|---|
| Date and type | Buy, sell, swap, spend, gift, transfer |
| Asset and quantity | The coin and the amount |
| Euro value | Value on that date, with the rate source noted |
| Fees in euro | Trading, withdrawal and network fees |
| Cost of coins disposed of | The purchase cost matched to this disposal, and the method used |
| Gain or loss | Euro value minus cost minus fees |
Add a final summary tab: total gains, total losses, net, less the exemption, times 33%. Keep a "notes" column for anything unusual, and a separate tab listing transfers between your own wallets so they are not counted as sales. Save a dated copy at the end of each tax year with the exported statements next to it, since Revenue says to keep records for six years.
The thorniest column is "cost of coins disposed of". Revenue's manual says gains are calculated asset by asset and disposal by disposal, but it does not prescribe FIFO, average cost or pooling for crypto, and we could not verify a published position. Pick a method with your adviser and use it consistently. Do not assume the four-week matching rule applies, because Revenue states it only for shares and securities.
Tax software: a fair look
Dedicated crypto tax software imports your exchange and wallet histories, values each transaction, and produces gain reports. That saves hours if you have hundreds of transactions across several platforms. Our research names these as the main tools that publish pages for Ireland: Koinly, CoinLedger, Coinpanda, TokenTax, Kryptos, Waltio, KoinX and bitcoin.tax. We have not tested any of them and have no commercial relationship with them, so this is a list of names and not a recommendation.
| Approach | Suits | Watch for |
|---|---|---|
| This calculator | A quick estimate with figures you already know | No imports, no valuation, single year |
| Spreadsheet | Up to a few dozen transactions | Manual errors, valuing swaps |
| Tax software | Many wallets, exchanges and transactions | Irish rules, matching method, cost, vendor-specific reports |
| Accountant | Complex or high-value situations, past gaps | Experience with crypto; fees |
Before you pay for any tool, ask four questions. Does it apply the Irish €1,270 exemption and the 33% rate? Does it use the calendar year? Which matching method does it use, and can you change it? Can it produce a transaction-level report your accountant can check? Some vendor pages are dated: one competitor guide we looked at carried schema dates from 2022 and 2024, which is a reminder to confirm that a tool's Irish information is current. Most also need extra caution with swaps, staking and DeFi, where the Irish position is not set out by Revenue (see below).
Remember, too, that a software report is a working document. You file with Revenue, not the vendor. Our overview of crypto tax in Ireland shows where each piece fits, and how to reduce crypto tax legally covers planning with the exemption and losses.
When a calculator is not enough
If you have staking income, or you might be trading rather than investing, or you have never filed, get advice before you put numbers into a return. And if you are starting from scratch, set up your record-keeping now: from 1 January 2026 exchanges collect your tax details and report annual totals to Revenue, as explained on the CARF and DAC8 page. The totals will be on file, so your own records need to be right.
Worked check: a mixed year
Here is a fuller example you can enter into the calculator. In one calendar year you sell Bitcoin for a net gain of €5,200, sell another coin at a loss of €1,100, and spend crypto on a flight with a gain of €300. Net gain: €5,200 minus €1,100 plus €300 equals €4,400. Less the €1,270 exemption leaves €3,130. At 33%, the CGT is €1,032.90. If the Bitcoin sale was in July and the flight in December, the tax on the whole year is not payable on one date: Revenue's rule is that disposals up to 30 November are paid by 15 December and December ones by 31 January, so you would split the liability between the two dates in line with Revenue's guidance, and an adviser can help you apportion it. Our reporting guide sets out the mechanics.
Checking the answer
After you have an estimate, test it three ways. First, reconcile it with your exchange statements: do the euro amounts you entered match the amounts that reached your bank or the values at the time of each swap? Second, check that every disposal in the year is in your list, including small ones; Revenue treats spending crypto on goods as a disposal. Third, compare the figure with the Revenue formula on its CGT calculation page, which gives sale price minus purchase price minus allowable expenses, then losses, then the exemption.
If the estimate is much higher than you expected, the likely culprits are missing fees, a loss not entered, or a purchase cost you could not locate. Go back to the records before you worry about the tax.
Privacy and the numbers you type
The calculator is a convenience for estimates; do not type account passwords, wallet seed phrases or private keys into it or into any tax tool, ever. Legitimate tax software asks for read-only API keys or CSV exports, not seed phrases. If a tool asks for a seed phrase, close it.
Keeping the tool honest over time
Rates and allowances are set by law and can move in a Budget. Revenue's exemptions page and filing page are the sources we check for the €1,270 exemption and the payment dates, and we date every check. If the date on this page is old and a Budget has passed, treat the output as provisional until you have confirmed the figures on revenue.ie. Treat a calculator as a second pair of eyes on your own working, not as the working itself.
A good habit is to run the estimate twice a year: once in the summer, to see whether you have already used the exemption, and once in early December, when you can still decide whether a planned sale belongs in this year or the next. The reasoning behind that timing is in our guide to reducing crypto tax lawfully.
Sources and further reading
Facts last checked 5 October 2026Published 5 October 2026How we research
Risk warning. Crypto-assets are volatile and you can lose all the money you put in. They are not covered by the Irish Deposit Guarantee Scheme. This page is general information, not financial or tax advice.
