Sweden's 3:12 rules govern how dividends and capital gains are taxed for owners who are active in their own closely held companies. They determine whether income taken out of a Swedish AB is taxed at 20% as capital, or at rates reaching 55% as employment income. On 1 January 2026, the most significant reform to these rules in years entered into force. The Swedish Parliament approved it in November 2025. According to the government's own analysis, around 80% of business owners in scope will be better off under the new system. The reform also introduced a new mandatory annual filing obligation that applies even in years when no dividends are paid. For foreign founders operating Swedish ABs, and for the growing number of internationally mobile owners who own shares in Swedish companies, the practical implications of this change need to be understood before spring 2027, when the first K10 forms calculated under the new rules must be submitted.
The mechanism: why Sweden taxes the same dividend at two completely different rates
The 3:12 rules exist because Sweden taxes capital income and employment income at very different rates. Dividends received by a passive investor in a public company are taxed at 30%. But Sweden recognised decades ago that a person who is the sole owner and active worker in their own company could structure all their income as dividends, paying 30% on everything instead of the progressive employment income tax rates that can reach 55%. The 3:12 rules close that gap for active shareholders in closely held companies (fåmansföretag).
The mechanism works through a threshold amount (gränsbelopp) calculated annually. Dividends up to the threshold are taxed at 20%, the preferential capital income rate. Dividends above the threshold are reclassified as employment income and taxed at progressive rates up to 55%, though without employer social security contributions on that element. The K10 form is where shareholders calculate and report the threshold each year. Getting the threshold calculation right is the central technical task, and the reform changed how it is calculated entirely.
The old dual-track system replaced with a single unified model
Before 2026, shareholders calculated the threshold amount under one of two rules: the simplified rule (förenklingsregeln) or the main rule (huvudregeln). The simplified rule allowed a standard amount regardless of salaries. The main rule allowed a larger salary-based component but required the shareholder to personally withdraw a minimum salary and own at least 4% of the shares. Choosing between the two rules was itself a planning decision, and the two-track system was widely criticised as unnecessarily complex.
- Two rules: förenklingsregeln and huvudregeln
- Standard amount: 2.75 income base amounts
- Salary component required 4% ownership and personal salary withdrawal
- Saved allowance earned annual interest uplift
- K10 only mandatory when dividends paid or saved allowance existed
- Annual choice between rules added planning complexity
- One rule, replacing both previous tracks
- Basic amount increased to 4 income base amounts (SEK 322,400 for 2026)
- Salary component: 4% ownership requirement and personal salary withdrawal requirement abolished
- Saved allowance interest uplift abolished going forward
- K10 now mandatory every year regardless of dividends
- Single calculation rule, designed for automation
The two components of the new threshold calculation
Under the new single-model rule, the threshold amount has two components. First, a basic amount of four income base amounts (SEK 322,400 for 2026), allocated proportionally across all closely held companies the shareholder owns. A shareholder can only use the basic amount once in total, regardless of how many companies they hold shares in. Second, a salary-based component equal to 50% of the total salary paid in the company that exceeds eight income base amounts (SEK 644,800 for 2026), distributed proportionally among shareholders. The salary component is now available to all shareholders who have an economic interest in the company, regardless of ownership percentage, removing the previous 4% ownership barrier.
According to the Swedish Government's official inquiry. The reform is broadly positive for sole owners with modest salary levels, minority shareholders previously excluded from the salary component, and companies with multiple owners and a substantial wage bill. Owners who lose out are those in companies with moderate salary levels where the new salary threshold (SEK 644,800) is not exceeded.
What most coverage of the 3:12 reform has not emphasised enough
Most commentary on the 3:12 reform focuses on whether the new calculation produces a better or worse outcome than the old one. Three other changes deserve equal attention because they affect what every AB owner must do differently from 2026, regardless of whether the calculation itself benefits them.
Under the previous rules, the K10 form was only required when a shareholder had paid themselves a dividend, had accumulated saved allowance to report, or had realised a capital gain on their shares. Many owners of Swedish ABs who routinely reinvested profits without taking dividends simply did not file K10 in those years.
From 2026, Skatteverket requires continuous annual K10 filing for all qualified shareholdings. The stated rationale is that Skatteverket needs ongoing oversight of the development of qualified shares, even in years when nothing distribution-wise occurs. Missing K10 in a year when no dividend was paid was previously a non-issue. From 2026, missing K10 is a filing omission regardless of dividend activity, and the consequences for the accumulated threshold calculation can compound over multiple years if not caught and corrected.
Under the old rules, unused threshold amounts that were saved from previous years earned an annual interest uplift, calculated by reference to the state loan rate plus a fixed percentage. For owners who had been building up substantial saved allowances over several years without taking dividends, this carried value that compounded over time.
From 2026, interest indexation on saved allowance is abolished. Saved amounts that already exist at the start of 2026 are not lost, but they will not continue to grow through interest as they previously did. For owners who had planned a dividend distribution in future years on the assumption that their saved allowance would continue to appreciate, the calculation of that future distribution needs to be revisited under the new rules.
Under the simplified rule in the old system, a shareholder could apply the standard amount in one closely held company without needing to split it. The new basic amount of four income base amounts is a single allowance per shareholder that must be allocated proportionally across all closely held companies in which the shareholder holds qualified shares.
For owners of multiple Swedish ABs, whether an operating company, a holding company, or companies in different sectors, this changes the planning dynamic. The previous approach of using the simplified rule in one company while accessing the main rule in another no longer applies. Shareholders with multiple company holdings need to reassess their ownership structure in light of how the basic amount is now split. In some cases, a restructuring towards a holding company model becomes more attractive to consolidate the basic amount into a single entity.
The honest picture across different owner profiles
| Owner profile | Under old rules | Under new rules from 2026 |
|---|---|---|
| Sole owner, no employees, low personal salary | Access to simplified rule standard amount only. No salary component. | Access to higher basic amount (SEK 322,400 vs previous SEK 222,525 equivalent). Better position. |
| Sole owner with employees, salary above SEK 644,800 | Main rule available. Required personal salary withdrawal. 4% ownership not a constraint as sole owner. | Full salary component available. No personal salary withdrawal requirement. Likely similar or better position. |
| Minority shareholder in a company with large wage bill | 4% ownership requirement blocked salary component access if stake was below threshold. | 4% requirement abolished. All shareholders can now access the salary component proportionally. Significant improvement for minority stakes. |
| Owner in a company with moderate total salaries below SEK 644,800 | Some salary component access available depending on personal withdrawal. | Salary component is zero because total company salaries do not exceed the SEK 644,800 threshold. May be worse position. |
| Owner of multiple closely held companies | Simplified rule usable in one company without splitting. | Basic amount must now be split proportionally across all holdings. Planning implications for holding structures. |
"The 3:12 reform is broadly positive for 80% of Swedish AB owners. It is also the most significant structural change to how dividends are taxed in Sweden for years, and it applies to the K10 filed in spring 2027 for the 2026 income year. That window to plan is now."
What the reform means for non-Swedish residents who own shares in a Swedish AB
The 3:12 rules apply to qualified shareholders who are active to a significant extent in their company. The rules do not require the shareholder to be a Swedish tax resident. A non-Swedish resident who is active in their Swedish AB, who founded the company, who takes management decisions, and who works for it in a meaningful way, can hold qualified shares subject to the 3:12 framework. The Swedish tax position on those dividends, if Sweden has taxing rights, is determined by the 3:12 calculation.
For foreign-resident AB owners, two practical points are particularly relevant. First, if Sweden does not have taxing rights over the shareholder's dividends under the applicable tax treaty, the 3:12 calculation may still need to be maintained for tracking purposes, particularly given the new mandatory annual K10 requirement. Second, the determination of whether an owner is active to a significant extent in their company is assessed on the basis of Swedish concepts of what constitutes significant activity, which does not automatically align with how the owner's activity is characterised under their home country's tax law. Foreign resident shareholders who have not previously needed to engage deeply with the 3:12 framework should review their position under the new rules with an adviser familiar with both Swedish and cross-border taxation.
The first K10 under the new rules is the one filed in spring 2027, reporting the 2026 income year. The K10 filed in spring 2026 (for 2025) was still calculated under the old rules. This means AB owners currently have a window to review and optimise their position under the new rules before the first mandatory K10 under the new framework is due. That window closes on the income earned and dividends paid during 2026. If you plan to take dividends from your Swedish AB in 2026, the new threshold calculation applies to those distributions.
1Office Sweden advises on the 3:12 threshold calculation, K10 filing, and dividend strategy under the new rules as part of the annual accounting service.
Three actions for Swedish AB owners before the first K10 under the new rules is filed
1. Calculate your threshold under the new rules before taking a 2026 dividend
If you plan to take a dividend from your Swedish AB during 2026, the amount that can be taxed at 20% versus the amount that will be taxed as employment income at up to 55% depends on your new threshold calculation. This calculation is different from anything you may have filed before. The basic amount, the salary component (if any), and whether any saved allowance carries forward all combine to produce the number. Calculating this before the dividend is paid, rather than after, is the difference between optimised and unoptimised extraction. 1Office Sweden prepares the threshold calculation as part of the annual accounting engagement and advises on dividend timing.
2. Assess whether your ownership structure still makes sense
For owners of multiple closely held companies, the reform changes the planning calculus on holding structures. Where a holding company previously allowed a shareholder to access the simplified rule in the operating company while accumulating capital at the holding level, the new basic amount allocation rule changes that. Some owners who previously had no strong reason to use a holding structure now have a reason to explore whether consolidating ownership through a holding company could optimise the threshold allocation. This is a question for 2026, not 2027, because the structure for the first K10 under the new rules is determined by the shares held during 2026.
3. Ensure K10 is filed in 2027 even if no dividend is taken in 2026
If you own qualified shares in a Swedish AB and do not take any dividends in 2026, you still need to file K10 for 2026 in your Swedish income tax return in spring 2027. This is the new mandatory filing obligation. Failing to file K10 in a year without dividends was previously acceptable. It is no longer. 1Office Sweden tracks this obligation for all accounting clients with qualified shareholdings. If you manage your own tax affairs or use a non-Swedish adviser who is unfamiliar with this change, confirm explicitly that the K10 obligation is being met for the 2026 income year.
The 3:12 reform applies to dividends paid and capital gains realised during the 2026 income year. The K10 reporting those amounts is filed in spring 2027. This means that decisions made in the second half of 2026, about whether and how much to distribute, about salary levels in the company during 2026, and about saved allowance utilisation, are the decisions that determine how the first K10 under the new system looks. Most AB owners are not thinking about their spring 2027 tax return yet. The ones who benefit most from the reform are the ones who review their position now, in July 2026, when there is still time to act on what the analysis shows.
1Office Sweden offers a 3:12 review as part of the ongoing accounting service, looking at each client's specific ownership structure, salary levels, and saved allowance to identify the optimal approach to 2026 distributions under the new rules.
Your 2026 dividends will be taxed under the new 3:12 rules. Plan them now, not in spring 2027.
1Office Sweden handles Swedish AB accounting, K10 preparation, and dividend planning under the new framework.
Sources and references: Swedish Parliament (Riksdag) legislative record, November 2025 (Budget Bill approval including 3:12 reform); PwC Sweden Tax Matters: New 3:12 Rules Enter into Force, December 2025; Leinonen Sweden: Sweden 3:12 Rules, May 2026; Revea Sweden: New Laws and Regulations 2026, January 2026; Eaktiebok: K10 and the 3:12 Rules from 2026; CMS Law Cross-Border Tax Forecast 2026 Sweden; Swedish Income Tax Act (Inkomstskattelagen) as amended January 2026.
