PRSI
If you and your spouse share the profits of your business, you each pay Class S PRSI as self-employed contributors, as long as you each have income of €3,174 or more a year from all sources.
Tax
As a first step, the partnership should be recognised by the Revenue Commissioners and registered for all relevant taxes (see Section 8). When you work with your spouse in a business partnership, you must make tax returns under the Revenue self-assessment system (for self-employed people). These tax returns must show the partnership income of each spouse so that PRSI contributions can be calculated accurately.