prsi calculator

What this PRSI calculator does

PRSI (Pay Related Social Insurance) is a core deduction and contribution system in Ireland. Employees, employers, and self-employed people can all have PRSI obligations, but the way it is calculated differs by class and income profile.

This calculator is designed to give you a clear estimate of PRSI so you can:

• Understand your likely personal PRSI deduction over a pay period and year.
• Estimate employer PRSI cost for payroll planning.
• Get a quick Class S-style view for self-employed budgeting.
• Model the impact of different rates and income levels.

How the calculator works

1) Convert your pay to annual pay

First, the tool annualizes your income based on frequency:

• Weekly × 52
• Fortnightly × 26
• Monthly × 12
• Annual × 1

2) Apply the selected PRSI rate

For employee-style calculations (Class A estimate), the tool applies your employee rate to annual gross pay. If enabled, it then applies a low-income weekly credit approximation.

For self-employed-style calculations (Class S estimate), it applies the personal rate, then checks a simple minimum-contribution rule and low-income threshold assumption.

3) Show annual and per-period values

Results are shown as annual totals and converted back to your selected pay frequency so you can see the expected amount per payslip period.

Understanding Class A vs Class S estimates

Employee (Class A style)

• Includes an employee PRSI estimate.
• Optionally includes a low-income PRSI credit approximation.
• Adds employer PRSI estimate as a separate cost line.

Self-Employed (Class S style)

• Calculates personal PRSI only (no employer PRSI).
• Uses a practical threshold/minimum logic for quick forecasting.
• Useful for sole trader and contractor budgeting scenarios.

Worked example

Suppose your gross monthly pay is €3,500 as an employee:

• Annual gross pay = €3,500 × 12 = €42,000
• Employee PRSI at 4.10% ≈ €1,722 (before any credit adjustment)
• Employer PRSI at 11.15% ≈ €4,683

If a low-income credit does not apply at that pay level, your personal PRSI estimate remains near the base percentage. If your income is lower, credit may reduce the effective employee PRSI.

How to use this tool for better financial planning

• Employees: Compare gross and post-PRSI pay to improve monthly budgeting.
• Employers: Forecast payroll costs by including employer PRSI, not just gross wages.
• Self-employed: Set aside a monthly PRSI amount instead of waiting for year-end surprises.
• Job changers: Test scenarios for different salaries and contract types.

Common mistakes to avoid

• Entering annual pay while monthly frequency is selected (or vice versa).
• Assuming one PRSI rate fits every worker and subclass.
• Ignoring employer PRSI when estimating total hiring cost.
• Using old rates from prior years without checking updates.

FAQ

Is this calculator official?

No. It is a practical estimate tool made for quick decision-making and planning.

Can I change the PRSI rates?

Yes. You can edit both personal and employer rates, which makes the calculator useful even when rates change.

Does this include USC or PAYE?

No. This page focuses on PRSI only. USC and PAYE should be calculated separately for full net pay estimates.

Final thoughts

PRSI can look simple on the surface, but small details make a big difference in real payroll outcomes. A good calculator helps you move from guesswork to clear numbers. Use this page as your first-pass estimate, then confirm your final figures with current official guidance or a payroll/tax professional.