DAC8 2026 – Crypto Customers’ Tax Residency, Self-Certification, and Blocked Log | Word/PDF/Excel

Does the crypto service provider need to obtain certificates of customers' tax residency and demonstrate how customer data has been reviewed? From 1 January 2026, new Swedish rules will apply due to DAC8 and the OECD's CARF. This specialized document package helps reportable crypto-asset service providers collect the correct customer documentation, document the reasonableness assessment, follow up on missing certificates, and prepare the first Swedish tax control return.

Quick facts: Five Swedish working documents, one Swedish user guide and one English User Guide, each in editable DOCX and searchable/printable PDF without interactive form fields. Also included is a Swedish Excel workbook with nine tabs and 377 formulas. 7 standalone documents × 2 formats + 1 XLSX = 15 customer files. Swedish law, version 1.0. Digital ZIP delivery will only occur after separate manual publication and connection of the delivery file.

For whom is this a useful template?

Intended for: reportable Swedish crypto service providers and their compliance, tax, customer due diligence, and reporting functions. Examples may include operators offering relevant exchange or transfer services for crypto-assets. Not intended for: private individuals who only hold, buy, or declare their own crypto-assets; this is not a private K4 attachment or guide for declaring crypto gains. Reporting obligations and any Swedish registration requirements must be determined for the actual operator.

The new deadlines – especially in Sweden

1 January 2026: Swedish rules on customer review and reporting obligations come into effect. New customer relationship from 2026: relevant review measures must be completed before reportable transactions can be carried out for the customer. Relationships before 1 January 2026: special transitional rule until 1 January 2027 for obtaining and reasonableness verification of tax residency. 1 April 2027: The Swedish Tax Agency's specified first Swedish reporting day for the calendar year 2026. Swedish Tax Agency guidance.

Exact file manifest

How the nine-tab Excel tool works

The work tabs are Overview, Customer Register, Self-declaration, Reasonableness Test, Reminders, Block Decision, Transactions, Reporting, and Read Me. There are 377 administrative formulas to distinguish received certificates from actually reviewed ones, show when documentation is missing, and identify cases where follow-up is needed. The empty customer workbook shows 0 on all key metrics.

Test case from quality assurance: Missing certificate gives MISSING CERTIFICATE. Contradictory KYC data gives CHECK DISCREPANCY. When an old customer relationship has a documented first request, both reminders, and at least 60 days, Excel shows TRY MANUAL BLOCK. Fictitious negative transaction values are marked for correction. No test customers, tax registration numbers, or actual transaction data are in the delivery file.

Important about reminders and blocks

According to law (2025:1377), Chapter 7, Section 14, the reportable provider must, in specified cases, prevent the user from reportable transactions when necessary information is missing after two reminders in addition to the first request and at least 60 days have passed. This is not a general 60-day exemption for new customer review. Excel neither makes binding legal decisions nor blocks real accounts. All decisions, technical measures, and effects must be documented in the company's authorization-controlled system.

Secure customer data handling

This is a working and control register. Store TIN, personal numbers, full customer documents, passwords, private keys, and other sensitive data in a separate, protected customer and KYC system. Use only internal customer IDs and documentation references in Excel. KOL contains special documentation and retention requirements, including normally at least seven years after the end of the calendar year the data refers to according to Chapter 7, Section 15. Handle GDPR, authorizations, access, and deletion in parallel.

How to use the files

1. First determine if the company is a reportable provider and which customer category is affected.
2. Select the correct self-declaration and collect the certificate via a secure collection channel.
3. Check the certificate against relevant already known customer and KYC data.
4. Document the request, reminders, and any manual block review – without mixing new and existing customer relationships.
5. Aggregate affected users and reportable assets, review, and follow the Swedish Tax Agency's current technical instructions for tax control return submission.

Questions and answers

Must everyone who owns bitcoin use this package?

No. The documents are intended for reportable crypto-asset service providers. They are not a private individual's tax return.

What applies to customers who already existed in 2025?

Special transitional rules mean that relevant residency certification and reasonableness review should generally be completed by 1 January 2027 at the latest.

Do companies that are customers need special certificates?

Yes, entities need to be classified. If the entity is not exempt or active according to relevant rules, persons with controlling influence may need to be identified and reviewed separately.

Can Excel automatically disable customers' crypto trading?

No. Excel only provides administrative control signals. A real transaction block requires a separate decision and technical implementation/effect control.

Can Excel create a valid DAC8 file for the Swedish Tax Agency?

No. This is a basis for internal quality assurance, not an authority-approved file format or an electronic submission.

Are the PDF files digitally fillable?

No. They are searchable and printable. Use DOCX for editing or the company's secure collection system for sensitive customer data.

Are there legal certificates in English?

No. The working templates and Excel are in Swedish; only the English User Guide contains English instructions.

Legal sources and transparency

KOL, law (2025:1377) · Swedish Tax Agency: obligation to carry out the review procedure · Swedish Tax Agency: crypto-assets – reporting and information exchange. Version 1.0 on 8 November 2026. The templates have undergone AI-assisted legal source control and technical file testing; no independent external legal or tax advisor review and no authority approval has been performed.