Deducting Trading Losses from Capital Income in Finland

General information about tax rules, not tax or legal advice. Rules change and every situation is different: check with a qualified adviser in your country before you file.

You lost money last year. Not spectacularly, just the ordinary way: a run of bad weeks on NQ in the spring, a stubborn position in crude, and the account finished 8,000 euros below where it started. In March the prefilled tax return arrives, it says nothing at all about any of that, and the easy thing to do is to leave it that way. Nothing to declare, nothing to pay, move on.

That is the expensive decision. A loss you do not declare in Finland is a deduction you have thrown away, and the Finnish rules on deducting trading losses from capital income are more generous than most traders here realise. The loss follows you for years. It just has to be on the record first.

What Finland does with a losing year

Finland taxes individuals in two separate streams. Earned income, ansiotulo, which is wages, pensions and benefits, is taxed progressively with municipal tax on top. Capital income, pääomatulo, which is interest, dividends, rental income and gains on selling property and securities, is taxed at a flat 30 percent, rising to 34 percent on the part of your capital income above 30,000 euros in a year.

Trading results belong to the capital income stream. A gain on a standardised exchange traded derivative is capital income. A loss is a capital loss, luovutustappio, and the basic rule in the Income Tax Act is that it is deducted from gains on the disposal of property in the tax year and in the five following years, as gains arise.

Five years is the part people miss. A bad year in 2026 is not a dead year. It is a credit sitting there for 2027, 2028, 2029, 2030 and 2031, waiting for the next profitable year to arrive. Losses are used oldest first, so the clock matters, but five years is long enough to cover a normal cycle of drawdown and recovery.

There is a second route as well. For a natural person, a capital loss that gains on disposals have not absorbed is deducted from net capital income before other deductions, which means it can reach interest, dividends and rental income rather than sitting idle until you sell something else at a profit. If you own a flat that you rent out, a losing year on MES is not stranded in its own compartment. You can read the underlying provisions in the Income Tax Act in Finlex, and the Tax Administration explains the practical version on its pages on investments.

The 30,000 euro line cuts both ways

The step from 30 percent to 34 percent is measured on your capital income as a whole, not on your trading alone. Dividends from a Finnish company, rent from a flat, interest, and the result of your futures account all land in the same pool, and the pool is what gets compared with the 30,000 euro line.

For a trader that has a pleasant side and an unpleasant one. The unpleasant one is that a very good year on futures can push the rest of your capital income up into the 34 percent band, so the marginal cost of the last few thousand euros is higher than the headline rate you had in mind. The pleasant one is that the same pooling is what lets a trading loss reach rental or dividend income at all. You cannot have the second without the first.

One thing the pool does not do is cross between people. A capital loss in Finland belongs to the person who made it. It is not transferred to a spouse the way some other countries allow, so a joint plan built on one partner's losses offsetting the other's gains does not work here.

Which derivatives actually count

The rule that treats a derivative loss as a capital loss is written around standardised derivative contracts: contracts with fixed terms, fixed sizes and fixed expiry dates, traded on an exchange, cleared centrally. That description fits the CME product range exactly. An MNQ contract is not a private agreement between you and a counterparty, it is a standard contract with a clearing house in the middle.

So the first question to settle is boring and decisive: what exactly did you trade, and on which venue was it listed. Keep the contract specifications and the broker statements that show the exchange and the product. If your instruments are exchange listed futures at a regulated venue, you are in the mainstream case. If they are not, and the amounts matter, you can apply to the Tax Administration for a preliminary ruling, an ennakkoratkaisu, on your own facts. It costs a fee and it takes time, and it is far cheaper than being wrong for four years in a row.

The two things a loss will never do

Finnish rules are decent about carrying a loss forward. They are strict about which pocket it can reach.

First, a capital loss does not create a deficit credit against the tax on your wages. Finland has a mechanism, the alijäämähyvitys, that lets a deficit in the capital income stream reduce the tax on earned income, capped at a modest annual amount which increases if you have children. Interest on a home loan gets you there. A capital loss does not. It stays inside the capital income stream and it waits.

That distinction is worth restating, because it is the single most common misunderstanding among Finnish traders with a salary. Losing 10,000 euros trading futures does not reduce the tax on your 55,000 euro salary. It reduces the tax on future capital income, and only that.

Second, the loss does not survive if you never declare it. The Tax Administration does not know what happened in a foreign brokerage account. It is not in your prefilled return, your broker does not file anything in Finland, and a loss that is not on a return is not in the system to be used later. Declaring a losing year takes fifteen minutes and it is the only way to keep the five year clock running.

Three years in numbers

Round numbers, one Finnish resident, all capital income below the 30,000 euro line so the rate stays at 30 percent, and a broker account trading micro contracts.

Year	Trading result	Loss carried in	Taxable capital income	Tax at 30 percent	Loss carried out
2026	minus 8,000 euros	0	0	0 euros	8,000 euros
2027	plus 5,000 euros	8,000 euros	0	0 euros	3,000 euros
2028	plus 12,000 euros	3,000 euros	9,000 euros	2,700 euros	0

Over three years the account is 9,000 euros ahead and the tax is 2,700 euros, which is 30 percent of what you actually made. That is the system working properly.

Now run the same three years for the trader who decided that a losing year was not worth declaring. The 2026 loss does not exist on any return. 2027 is taxed on 5,000 euros, which is 1,500 euros of tax. 2028 is taxed on 12,000 euros, which is 3,600 euros. Total tax 5,100 euros on a three year profit of 9,000 euros, an effective rate of 57 percent, on a cycle where the real profit was identical.

The difference, 2,400 euros, is the price of skipping one form after a year you would rather forget. It is also the single most concrete reason to keep a tidy file even when the year went badly.

Change one assumption and the gap widens. If the good year is large enough to push part of your capital income over 30,000 euros, the unused loss would have been shielding income taxed at 34 percent rather than 30, and the arithmetic gets worse for the trader who filed nothing. If the recovery comes in the sixth year rather than the third, the loss has expired and the comparison is worse again, which is the argument for declaring early and for not assuming a drawdown will be repaired at leisure.

Getting it on the return

The prefilled return, esitäytetty veroilmoitus, arrives in the spring with your wages and your domestic interest already on it, and with a deadline printed on the front that varies between taxpayers. Your CME trades will not be there. You add them in OmaVero, in the section for capital gains and losses, or on the corresponding paper form if you still file that way. The Tax Administration's guidance on tax returns sets out the mechanics and the dates for the current year.

Three practical points that decide whether the numbers hold up.

• The result is the real result. Commissions, exchange and clearing fees and the NFA fee are part of what a trade cost and what it returned. The deemed acquisition cost that helps when you sell a house or an old share holding is generally no help with a cash settled derivative, so the actual figures are what you work with. Keep the statements that produce them.
• The currency has to be converted. CME contracts settle in dollars, your return is in euros. Use a consistent, documented basis for the conversion across the whole year rather than picking the rate that flatters each trade.
• Declare each year in its own year. The five year clock runs from the year the loss arose, and losses are consumed oldest first. Filing three years of corrections at once is possible but it is slow and it invites questions you could have avoided.

If instead you have a strongly profitable year, the other half of the timing question matters: tax on capital income that nobody withheld at source becomes payable after the assessment, and there is a way to pay an additional prepayment in OmaVero rather than waiting. Doing it early keeps the interest on residual tax down. The rates and the cut off dates for that are published by the Tax Administration and they change, so check them in January rather than trusting a figure from a previous year.

What to keep, and for how long

A Finnish trader's file is short but it has to be complete, because the Tax Administration can come back to a year long after you filed it and the only evidence that exists is yours.

Keep the monthly and annual broker statements in the original currency, a year end summary showing the net result, the exchange rates you used and the basis for using them, the record of any loss carried forward and the year it arose, and the bank records for every transfer in and out of the account. Six years of that in a folder is a reasonable habit. Electronic copies are fine, as long as they still open when you need them, which is an argument for plain PDF files rather than a broker's online portal you may no longer have access to.

One last word about scale. Once trading is genuinely your main activity rather than something you do in the evenings, the question of whether you should be operating through a limited company instead of as a private individual becomes real, and the answer depends on how much you take out, what else you earn and what you want the structure to do. That is a conversation with an adviser and an accountant, not a decision to make from a blog post. What is true at every size is the point this article started with: leveraged futures can lose you more than the money you put in, and a loss that is properly declared is at least a loss that works for you later.

This article is general information about how the Finnish rules are structured, not tax or legal advice. Rates, thresholds and the detailed treatment of specific instruments change, and your own position depends on what you trade, where you trade it and what else you earn, so confirm the current figures with the Finnish Tax Administration and take a specific case to a Finnish adviser before you file. The Tax Administration's own material for individuals is at vero.fi.

deducting trading losses from capital income

Educational content, not investment advice. Trading futures involves substantial risk of loss and is not suitable for every investor. Any reference to Algomyth results is hypothetical, simulated over historical data, and shown in full on the performance page; past performance does not guarantee future results.