New K2 and K3 Accounting Rules in Sweden: What Companies Should Know from 2026

For many small companies in Sweden, K2 has been the simpler and more common accounting framework for annual reports. K3 is more detailed and often used by larger or more complex companies. From 2026, changes introduced by Bokföringsnämnden affect which entities can use K2 and what companies need to consider when preparing annual reports. 

If your company prepares an annual report in Sweden, this is a topic worth reviewing before your next year-end.

What are K2 and K3?

K2 and K3 are Swedish accounting frameworks used when preparing annual reports.

K2 is a simplified rules-based framework. It is often used by smaller companies because it is easier to apply and involves fewer judgement-based assessments.

K3 is the main principles-based framework. It is more comprehensive and requires more analysis, documentation and accounting judgement.

The right framework depends on the type of business, its size, complexity and legal requirements.

What is changing from 2026?

Bokföringsnämnden has introduced changes to the K2 and K3 rules that apply from financial years beginning after 31 December 2025. 

One of the most important changes is that certain companies and associations will no longer be able to use K2.

According to Bokföringsnämnden, companies that may no longer apply K2 include, among others:

• housing associations and tenant-owner associations

• companies with one or more foreign branches during the financial year

• companies that have had crypto assets during the financial year, except where crypto was only used or received on an isolated occasion as payment

• companies that have acquired goods or services in exchange for share-based payments, such as employee incentive programmes 

This means some organisations that previously relied on the simpler K2 framework may need to move to K3.

Why this matters for Swedish companies

The move from K2 to K3 is not just a technical accounting change. It can affect how assets, depreciation, provisions, disclosures and financial performance are presented in the annual report.

K3 often requires more detailed assessments and more documentation. For companies that are close to year-end, waiting too long can make the transition more stressful.

The change may also affect how external parties view the company. Banks, investors, board members and potential buyers often review annual reports carefully. A move to K3 can change how the company’s financial position is presented.

Special impact on housing associations

Housing associations are one of the groups most affected by the new rules. Bokföringsnämnden states that housing associations and tenant-owner associations must prepare annual reports under K3 for financial years beginning after 31 December 2025. 

This is important because K3 often requires component depreciation for buildings. Instead of treating a building as one single asset, different parts of the building may need to be depreciated separately based on their useful life.

For example, a roof, lift, heating system and façade may all have different useful lives. Under K3, this can create a more detailed and transparent picture of future maintenance costs.

For board members, property managers and housing association members, this may make the annual report more informative, but also more complex.

Companies with crypto assets should review their accounting

Another important change concerns crypto assets. Bokföringsnämnden states that companies that have had crypto assets during the financial year generally may not apply K2, except where crypto was only used or received on an isolated occasion as payment. 

This is relevant for companies that:

• hold cryptocurrency as an asset

• receive crypto payments

• trade crypto

• use crypto in business transactions

• invest company funds in digital assets

Crypto accounting can be complex because classification, valuation and documentation need to be handled correctly. Businesses with crypto exposure should review this before year-end.

Foreign branches and international businesses

Companies with one or more foreign branches during the financial year may also be unable to use K2 under the new rules. 

This is especially relevant for international entrepreneurs and Swedish companies expanding abroad.

If your Swedish company operates in another country, has foreign registration, local payroll, overseas sales activity or a branch structure, you should check whether K3 applies.

International operations often create additional accounting questions, including:

• currency translation

• foreign tax reporting

• intercompany transactions

• permanent establishment risks

• consolidation issues

• VAT and cross-border invoicing

What should businesses do now?

The best approach is to review your accounting framework before the financial year closes. If your company needs to move from K2 to K3, you may need extra preparation.

Important steps include:

1. Confirm which framework your company currently uses
   Check your latest annual report and accounting policies.

2. Review whether your company still qualifies for K2
   Consider crypto assets, foreign branches, share-based payments and other complexity.

3. Assess the impact of moving to K3
   Identify which accounting areas may change.

4. Update documentation
   K3 often requires stronger documentation and more accounting judgement.

5. Plan year-end work earlier
   A transition to K3 may take more time than a normal year-end closing.

Common mistakes to avoid

Many businesses wait until the annual report is being prepared before checking whether K2 or K3 applies. That can create unnecessary pressure.

Common mistakes include:

• assuming K2 can still be used because it was used last year

• missing crypto-related accounting implications

• overlooking foreign branch activity

• underestimating K3 documentation requirements

• not updating accounting policies

• failing to involve the board early enough

The earlier you review the rules, the easier the transition becomes.

Do you need help with K2 or K3 accounting in Sweden?

If your company is affected by the new K2 and K3 rules, professional accounting support can help you avoid mistakes and prepare correctly.

An accountant can help you:

• assess whether K2 or K3 applies

• prepare for a transition to K3

• review accounting policies

• handle annual report requirements

• document complex accounting areas

• coordinate bookkeeping, tax and annual reporting

For many companies, this is not only a compliance issue. It is also an opportunity to improve financial reporting and create better insight into the business.

Final thoughts

The K2 and K3 changes from 2026 are important for companies and associations in Sweden. Businesses with crypto assets, foreign branches, share-based payments or housing association structures should review the rules early.

Accounting rules can feel technical, but the practical message is simple: do not wait until year-end. Check your framework now, understand what applies to your business and prepare your documentation in time.

Still unsure whether your company can still use the K2 framework or needs to transition to K3? Contact us for accounting support in Sweden and we will make sure your company stays compliant.