Svensk Skatte-API

About Svensk Skatte-API

Svensk Skatte-API is a machine-to-machine API for Swedish tax calculations, covering ISK tax (schablonintäkt based on the 2026 rules), VAT (moms) at 25/12/6% rates including reverse and deductible calculations, income tax (kommunal and statlig, using 2026 tax brackets), and employer social security contributions (arbetsgivaravgift) with age-based rules and component breakdowns.

The API exposes endpoints for health checks, ISK tax and kapitalunderlag calculations, VAT calculations (from net price, from gross price, and net VAT payable), a VAT rate listing endpoint, income tax and employer contribution calculations, and an admin endpoint for API key creation. Documentation is provided via an interactive Swagger interface, with source code available on GitHub.

The service is offered on a free plan (30 requests/minute, access to all endpoints, includes a demo API key) and a paid Pro plan at 199 kr per month (300 requests/minute, a dedicated API key, described as production-ready). It is published by Gracestack AB.

Key features

• Calculates ISK tax (schablonintäkt) using 2026 rules
• Calculates Swedish VAT (moms) at 25/12/6% including reverse and deductible VAT
• Calculates municipal and state income tax using 2026 bracket thresholds
• Calculates employer social security contributions with age-based rules
• Provides interactive Swagger API documentation
• Offers a free demo API key for instant testing

Frequently asked questions