Osakesäästötili vs. Arvo-osuustili: Which Investment Account to Choose in Finland
Compare Finland's two main investment accounts — the equity savings account (osakesäästötili) with its €50K deposit cap and tax deferral, versus the traditional brokerage account (arvo-osuustili). Learn the tax implications, strategy, and when to use each.
If you are building wealth through stocks in Finland, one of the first decisions you face is where to hold your investments. Finland offers two primary account types for equity investing: the osakesäästötili (OST), or equity savings account, and the traditional arvo-osuustili (AOT), or book-entry account. Choosing the wrong one — or not understanding when to use each — can cost you thousands of euros in unnecessary taxes over a lifetime of investing. This guide breaks down both accounts in detail so you can make an informed decision.
What Is an Osakesäästötili (Equity Savings Account)?
The osakesäästötili was introduced in Finland on January 1, 2020, and it was a game-changer for retail investors. It is a special tax-advantaged account designed specifically for stock and ETF investing. The key feature: you pay no taxes on gains, dividends, or trades inside the account until you make a withdrawal. This means you can buy and sell stocks freely, collect dividends, and reinvest everything without triggering any tax events. The taxman only comes knocking when money leaves the account. Each person can open exactly one OST, and the lifetime deposit cap is 50,000 euros. This cap applies to deposits only — your portfolio can grow well beyond 50,000 euros through investment gains, and that growth is perfectly fine.
Important: The 50,000 euro cap on the osakesäästötili applies to total deposits over the account's lifetime, not the current balance. If you deposit 50,000 euros and later withdraw 10,000 euros, you cannot deposit another 10,000 euros — you have already used your full deposit quota.
What Is an Arvo-osuustili (Book-Entry Account)?
The arvo-osuustili is the traditional brokerage account that has existed in Finland for decades. Unlike the OST, there is no deposit limit — you can invest as much as you want. However, every taxable event is reported and taxed in the year it occurs. When you sell a stock at a profit, that capital gain is taxed. When you receive dividends, those are taxed. When you rebalance your portfolio by selling one position to buy another, the sale triggers a tax event. Finnish capital gains tax is 30% on gains up to 30,000 euros per year and 34% on gains exceeding that threshold. Dividends from listed Finnish companies are taxed at an effective rate of roughly 25.5% (85% of the dividend is taxable income, taxed at 30%).
Tax Treatment: The Critical Difference
The fundamental difference between the two accounts is when and how you are taxed. In the AOT, you pay taxes annually on all realized gains and dividends. In the OST, you defer all taxes until withdrawal — and when you do withdraw, the taxable amount is calculated proportionally. Specifically, the withdrawal is split between your original deposits and your investment gains, and only the gains portion is taxed at the standard 30% or 34% capital gains rate. This proportional taxation is hugely advantageous because it means even partial withdrawals are only partially taxed.
Example: You deposited 50,000 euros into your OST and it grew to 100,000 euros. If you withdraw 20,000 euros, half is considered deposits (10,000 euros, tax-free) and half is considered gains (10,000 euros, taxed at 30% = 3,000 euros tax). In an AOT, you would have been paying taxes on every dividend and every profitable sale along the way.
The Compounding Advantage of Tax Deferral
Tax deferral is not just a convenience — it is a mathematical advantage that compounds over time. Every euro you would have paid in taxes but instead kept invested continues to earn returns. Consider two investors who both invest 50,000 euros in the same stocks earning 8% annually. Investor A uses an AOT and pays taxes annually on dividends and any realized gains. Investor B uses an OST and defers all taxes. After 20 years, Investor B will have significantly more money, even if both pay the same total tax rate eventually. The difference grows with time because the deferred taxes are compounding on your behalf. Over 30 years of investing, this tax drag difference can amount to tens of thousands of euros.
When to Use the Osakesäästötili
- Active trading or frequent rebalancing — since trades inside the OST are tax-free, this is the perfect home for strategies that involve frequent buying and selling.
- Dividend stock investing — dividends are not taxed inside the OST, so you get the full reinvestment benefit without the annual tax drag.
- High-growth stocks — if you expect significant capital appreciation, the tax deferral on gains is maximally valuable.
- Your first 50,000 euros of equity investing — there is almost no reason not to fill your OST before using an AOT for direct stock holdings.
- Long time horizon — the longer your investment horizon, the more valuable tax deferral becomes through compounding.
When to Use the Arvo-osuustili
- You have already maxed out your 50,000 euro OST deposit cap — the AOT has no limits.
- You want to invest in instruments not available in the OST — such as bonds, derivatives, or certain fund types. The OST only allows stocks and ETFs listed on regulated exchanges.
- Tax-loss harvesting — in an AOT, you can strategically realize losses to offset gains elsewhere, which is not possible in an OST.
- You need the hankintameno-olettama (deemed acquisition cost) benefit — for very long-held investments (10+ years), the AOT allows you to use a 40% deemed acquisition cost, meaning only 60% of the sale price is taxed. This benefit does not exist in the OST.
- You want to use the 1,000 euro annual capital gains exemption — small gains in an AOT under 1,000 euros per year are tax-free. This does not apply to OST withdrawals.
The Optimal Strategy: Use Both
The smartest approach for most Finnish investors is to use both accounts strategically. Fill your osakesäästötili first with your initial 50,000 euros — use it for your core equity portfolio, especially dividend stocks and positions you plan to trade or rebalance frequently. Once your OST is maxed out, continue investing through your arvo-osuustili. In the AOT, prioritize buy-and-hold positions that you plan to keep for 10+ years (to benefit from the 40% hankintameno-olettama), and consider accumulating ETFs that reinvest dividends internally to minimize annual tax events. If you also hold mutual funds, remember that Finnish mutual fund investments can go in neither account — they are held separately and taxed differently.
The best tax strategy is not about avoiding taxes — it is about controlling when you pay them. Every year you defer taxes on investment gains is another year those euros compound in your favor.
Choosing a Broker for Your OST and AOT
Most major Finnish brokers — Nordnet, Nordea, OP, Danske Bank, and others — offer both account types. When choosing, compare trading fees (especially for your typical order size), the selection of available instruments, and the user experience of the platform. Nordnet is particularly popular among Finnish retail investors for its competitive fees and wide selection. One important note: you can only have one OST at one broker at a time. You can transfer it to another broker, but you cannot split it across multiple brokers. AOT accounts, however, can be held at multiple brokers simultaneously.
Tracking Your Accounts with Fillioneer
Whether you use an OST, an AOT, or both, tracking your total portfolio performance across all accounts is essential. Fillioneer lets you add investments from all your accounts into a single unified view. You can see your combined net worth, track individual asset performance, and monitor your progress toward financial independence regardless of which account type holds each investment. The key insight is that your FIRE number does not care about account types — it cares about total invested assets. Use the right accounts for tax efficiency, but focus your tracking and motivation on the total portfolio.