Keep three different decisions separate
Your business registration, income-tax residence and applicable social-security legislation answer different questions. A Czech OSVČ registration does not automatically end obligations in your previous country.
The practical problem is usually a timeline: an old company stops invoicing, a personal contract begins, you spend time abroad, and another registration opens. Those dates need to fit together, even when each individual form looks simple.
What an A1 application can establish
A1 is evidence of the applicable social-security legislation. ČSSZ provides a specific application for self-employed people requesting that determination. It is not a tax-residence certificate, and issuance is an authority decision rather than a guaranteed part of an accounting package.
Temporary work abroad and regularly working in several countries are different situations. We first identify the relevant facts, then agree any Czech-side assessment or application support.
Prepare a work-and-residence timeline
A useful first summary is factual, not a statement that you prefer the cheaper system. Dates and locations make it possible to identify what the authority or foreign adviser must confirm.
- Where you live and where you physically perform each activity.
- Expected on-site visits and recurring work in other countries.
- Employment, self-employment or company roles that continue abroad.
- Current insurer, existing A1 or other decisions, and planned changes.
Do not cancel insurance on the strength of a new IČO
Coordinate any change with the competent institutions. A new registration and a plan to close the old business are not the same thing as confirmation of when the previous coverage ends and the next coverage begins.
We can organise the Czech notifications and the documents requested for the agreed case. Foreign deregistration, arrears or unresolved foreign contributions should be handled with the responsible adviser or authority there.
Cross-border income tax remains a separate workstream
Income-tax treatment depends on the countries' rules and the relevant double-tax treaty. An A1 outcome does not decide it. Describe your residence and working arrangements without relying on nationality or the invoice recipient alone.
Our written scope makes the boundary explicit: Czech accounting and filings, any separately priced Czech-side review, and the points requiring a foreign tax or legal professional. You know what is covered before paying.
Official sources
Primary sources for the cross-border rules referenced above.