Sweden 3:12 rules, which govern the taxation of dividends and capital gains for owners of closely held companies, underwent their most significant reform in years when the Swedish Parliament (Riksdagen) approved new legislation in November 2025. The changes entered into force on 1 January 2026, and apply for the first time to fiscal years beginning after 31 December 2025. In practice, this means that the K10 form filed in spring 2027 will be the first calculated under the new provisions.
The reform replaces the previous dual-track system with a single, unified calculation model. The stated objectives are to simplify compliance, equalise conditions between different types of shareholders, and create a more supportive tax environment for entrepreneurship and SME growth in Sweden.
What Are the 3:12 Rules?
The 3:12 rules address a fundamental tension in the Swedish tax system: capital income, such as dividends, is taxed at a substantially lower rate than employment income. Without specific restrictions, owners of closely held companies would have a strong incentive to pay themselves through dividends rather than salary, thereby avoiding higher marginal tax rates and social security contributions.
The rules apply to owners who hold qualified shares in a closely held company, typically meaning that the owner, or a related party, is active to a significant extent in the business. They work by calculating a threshold amount (gränsbelopp) each year. Dividends and capital gains up to this threshold are taxed at a preferential rate of 20%. Amounts that exceed the threshold are instead taxed as employment income, at progressive rates that can reach 55%, though without liability for employer social security contributions.
What Has Changed from 1 January 2026?
The reform abolishes the previous choice between the simplified rule (förenklingsregeln) and the main rule (huvudregeln), replacing them with a single calculation model. The new threshold amount consists of three components:
- Basic amount: Four income base amounts (322,400 SEK for 2026), distributed across all shares in the company. This amount may only be claimed once per owner per year. Where a shareholder holds shares in several closely held companies, the basic amount must be allocated between them in proportion to the respective shareholding. The basic amount represents an increase from the previous simplified rule level of approximately SEK 200,000, which benefits sole owners and those with lower salary levels.
- Salary-based amount: Equal to 50% of the shareholder’s share of the company’s total gross cash wages (including subsidiaries), after deducting eight income base amounts (644,800 SEK for 2026) per shareholder. This replaces the previous salary withdrawal requirement, meaning that there is no longer a minimum salary threshold that the owner must meet in order to access the wage-based component. For spouses, only one salary deduction applies and the amount is calculated jointly. Notably, the salary-based amount cannot exceed 50 times the salary of the shareholder or a related party.
- Capital component: Interest (at the government borrowing rate plus 9%) may still be calculated on the acquisition cost, but only on the portion exceeding SEK 100,000. Previously, indexation applied to the full acquisition cost.
Several further changes accompany the new calculation model:
- Capital share requirement removed: The previous requirement of 4% ownership to access the wage-based amount has been abolished, giving all shareholders equal access regardless of ownership stake.
- Indexation of saved dividend allowance removed: Unused threshold amounts carried forward no longer accrue annual interest. They are carried forward at their nominal value.
- Qualification period shortened: The period during which shares remain qualified after the owner ceases to be active (the so-called dormancy or karenstid period) is reduced from five to four years. This applies only to qualification periods that begin on or after 1 January 2026. Shareholders already in a dormancy period before that date continue under the five-year rule.
- Revised subsidiary definition: The special tax-law definition of subsidiaries within the 3:12 framework is abolished. The civil-law definitions from the Limited Liability Companies Act and the Annual Accounts Act now apply. A limitation is introduced whereby salaries paid in companies owned through alternative investment funds (AIFs) cannot be included in the wage base.
- Related party definition unchanged: The original 2024 proposal included a narrowing of the related party definition that would have excluded siblings and their spouses and children. This element was not included in the final legislation. The current definition remains in force, and siblings continue to be treated as related parties for the purposes of the 3:12 rules.
K10 Reporting: What Changes in Practice?
One practical change with direct compliance implications is that the K10 form must now be filed every year for qualified shares, regardless of whether any dividend has been paid or whether the shareholder has any saved threshold amount to report. Under the previous rules, filing was tied to distributions or accumulated allowances. From 2026, the Swedish Tax Agency requires continuous reporting to maintain oversight of qualified shareholdings. Shareholders owning shares in multiple closely held companies will also need to ensure that the basic amount is correctly allocated between companies in their K10 submissions.
Who Benefits and Who Should Proceed with Caution?
The Swedish Government’s own official inquiry indicated that approximately 80% of business owners will be better off under the new rules. However, the reform is best understood as a redistribution rather than a straightforward tax reduction across the board.
Groups likely to benefit include:
- Sole owners with no or modest salary levels, who gain access to a larger basic amount compared to the old simplified rule.
- Minority shareholders in companies with a large wage base, who previously could not access the salary-based component due to the 4% ownership requirement.
- Shareholders approaching the end of their dormancy period, who benefit from the reduced four-year qualification period for new periods starting from 2026.
Groups that should review their position carefully include:
- Shareholders with significant saved dividend allowance who benefited from annual indexation of carried-forward amounts, which no longer applies.
- Owners of multiple closely held companies, who previously could claim the full simplified-rule amount in each company but must now split the basic amount between them.
- Companies with many shareholders and a large wage base, where differing ownership stakes will result in different individual allowances, potentially creating tension around optimal distribution levels.
Transitional Considerations
Because the 2026 salary-based allowance is calculated on salaries paid during 2025 and the ownership structure as of 1 January 2026, decisions taken before year-end 2025 may still affect the threshold amount available in 2026. Shareholders who took dividends in early 2026 under the assumption that old indexation rules applied to their saved allowance should verify their position. A transitional rule also permits certain older provisions to be used for fiscal years beginning before 1 January 2029 in specific circumstances.
How Leinonen Can Help
The new 3:12 framework represents a genuine structural change to Swedish owner-manager taxation. While the stated intent is simplification, the practical effect on any given shareholder depends on salary levels, ownership structure, the number of companies held, and the size of any accumulated threshold amount. An assessment of how the new rules apply to your specific situation is strongly advisable.
Leinonen Sweden accounting professionals can assist with threshold amount calculations under the new model, K10 preparation and compliance, review of ownership structures, and advice on dividend planning for 2026 and beyond. To arrange a consultation, contact our Swedish team today.
