ISK, Pension, and Contracting: What Swedish Tech Workers Need to Know Beyond Salary Tax

An Investeringssparkonto (ISK) is Sweden's flat-tax investment account, the default way most Swedes hold stocks and funds since it replaced the old buy-and-sell capital gains tax model for most retail investors. Instead of paying 30% tax on realised gains every time you sell, an ISK charges a flat annual tax based on your account's average value, regardless of whether your investments went up, down, or sideways that year. For most people trading or holding equities and funds long-term, that flat-tax structure is simpler and, in most market conditions, cheaper than the standard capital gains alternative.

In two steps. First, your capital base (average account value through the year) is multiplied by the statslåneräntan (the government borrowing rate) as of 30 November of the prior year, plus 1 percentage point. For the 2026 tax year, that's 2.55% + 1% = 3.55%. Second, that resulting figure, called the schablonintäkt, is taxed at Sweden's standard 30% capital tax rate: 30% of 3.55% works out to an effective annual rate of 1.065% of your capital base. From 2026, the first 300,000 kr per person across all your ISK, kapitalförsäkring, and PEPP accounts combined is entirely tax-free, a new and significant allowance that didn't exist before.

Less than most people expect, especially under the new 2026 tax-free threshold. On a 500,000 kr ISK balance, the first 300,000 kr is tax-free, leaving 200,000 kr taxed at 1.065%, which comes to roughly 2,130 kr for the year. On a 1,000,000 kr balance, 700,000 kr is taxable, for roughly 7,455 kr in ISK tax for the year. Compare that to a standard depå (regular brokerage account), where realised capital gains are taxed at a flat 30%, the ISK's flat, modest annual charge is why it's become the default choice for most Swedish retail investors.

Yes, often more than people realise, since it's frequently a meaningful chunk of total compensation that doesn't show up in a base-salary comparison. Most Swedish employers, particularly larger tech companies and those covered by a collective bargaining agreement (kollektivavtal), pay an employer-funded occupational pension on top of salary, commonly structured so a higher percentage applies to income above a certain threshold than below it. The exact percentage and threshold depend entirely on your specific employer's plan (ITP1, ITP2, or a private equivalent for non-collective-agreement employers), so always ask for the specific pension terms when comparing job offers, not just the base salary.

It's the standard path for genuine independent contracting in Sweden, in the same way freelancers elsewhere register as sole traders or set up a limited company. Running your own AB lets you bill clients, pay yourself a mix of salary and dividends, and manage your own bolagsskatt (corporate tax, a flat 20.6%) rather than being taxed purely as an employee. The trade-off is real administrative overhead, bookkeeping, annual reports, and F-skatt registration, plus taking on business risk that a salaried employee doesn't carry, so it only makes sense once contracting income is substantial and consistent enough to justify it.

Under Sweden's 3:12 rules for closely-held companies (fåmansföretag), dividends up to a calculated threshold called the gränsbelopp are taxed at a favourable flat 20%, while dividends above that threshold are taxed as regular employment income at your marginal rate, which can run significantly higher. From income year 2026, the gränsbelopp calculation was simplified into a single method: a base amount of 322,400 kr per owner (4 times the 2025 inkomstbasbelopp), plus a wage-based supplement calculated from company salaries paid above a further threshold. Whether you're within or above your gränsbelopp changes your dividend tax rate dramatically, so this is genuinely worth planning around, ideally with an accountant, rather than guessing.

ISK accounts are specifically for individuals, not companies, so a contractor's AB itself can't hold an ISK, business cash and investments inside the company are taxed under Sweden's corporate rules (20.6% flat corporate tax on profit) instead. Where ISK becomes relevant to a contractor is exactly the same way it does for any salaried employee: personal savings and investments held outside the business, whether that's salary you've drawn from the AB or dividends you've taken out, are natural candidates for an ISK once they're in your personal name.