Knowledge for clients
Understand social security, construction withholding tax and contracts for work separately. Practical checkpoints for your next project.
As of: November 2026
The A1 explained clearly: applicable social security, issuance for self-employed persons and practical document checks before a foreign assignment.
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As of: November 2026
15% construction withholding tax, valid exemption and checks at payment: a practical guide for clients of construction services.
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Work performance, right of instruction and integration: practical checkpoints for cooperation with self-employed subcontractor teams.
Read articleCountries of deployment
A1, exemption certificate § 48b, contract for work
Plan a deploymentZKO notification, A1, accommodation arranged
Plan a deploymentNotification procedure, A1
Plan a deploymentA1, WagwEU notification, contract for work
Plan a deploymentA1, LIMOSA declaration, contract for work
Plan a deploymentProjects in all EU member states on request
Plan a deploymentYour next project
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