C/C++ Developer Day Rate Calculator: Ireland 2026

Your tax treatment depends on your operating structure. PAYE umbrella: the umbrella deducts employer PRSI before calculating your gross, then applies Income Tax, USC, and PRSI (Class A). Sole trader: you pay Income Tax, USC, and Class S PRSI on net profits, which is generally more tax-efficient. Director: treated similarly to sole trader but with director-level PRSI (Class S). The calculator above shows all three side by side.

Retention rates vary by structure and day rate. Sole traders typically retain 55–65% of gross contract income at mid-market rates after Income Tax, USC, and PRSI. PAYE umbrella structures retain slightly less due to employer PRSI. Higher rates push retention lower as more income falls into the 40% tax band.

Sole trader generally gives better take-home at most day rates but requires filing a Form 11 self-assessment return annually. PAYE umbrella is simpler but results in lower net pay because employer PRSI is deducted before your gross is calculated. For most C/C++ Developer contractors, the additional admin of sole trader pays off financially beyond roughly €300/day.

At €339/day over 220 billable days, the gross annual contract income is €75K. This is a 8% gross premium over the C/C++ Developer permanent salary median of €69K/year. The premium compensates contractors for self-funded employer PRSI, pension, holiday pay, sick pay, and business overheads, costs a permanent employer covers on behalf of an employee.

At the median €339/day, a C/C++ Developer contractor working as a sole trader takes home about €52,391 a year, 70% of the €74,580 billed over 220 billable days. A permanent C/C++ Developer on the €69K median takes home €49,673, so contracting at the median rate leaves €2,718 more a year before unpaid holidays, pension, and gaps between contracts. On take-home alone, contracting draws level with that salary at about €314/day.