Quick answer
- USC is a tax on relevant income; PRSI is a social-insurance contribution.
- USC uses annual exemption and cut-off rules, while PRSI depends on contribution class and earnings thresholds.
- Paying PRSI can build a contribution record for benefits; USC does not.
- There is no reliable single combined PRSI-and-USC percentage for every worker.
USC Calculator
Open this Irish calculator to test your own numbers and compare the result with the guide.
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PRSI and USC compared
| Question | USC | PRSI |
|---|---|---|
| What is it? | A tax on relevant income | Pay Related Social Insurance |
| What controls it? | Annual exemption, cut-off points and standard/reduced treatment | PRSI class, weekly earnings, age and contribution rules |
| Do Income Tax credits reduce it? | No | No |
| Does it build benefit entitlement? | No individual contribution record | Contributions can support entitlement to specified benefits |
| Can it be refunded? | Yes, where overpaid under payroll or annual liability | Only in defined overpayment or incorrect-class situations |
PAYE Income Tax is a third calculation. The separate PAYE comparison guide owns the full three-deduction calculation order, so it is not repeated here.
Why “PRSI and USC rates” has no single answer
USC uses progressive slices and can have standard, reduced or additional non-PAYE treatment. Employee PRSI depends on the contribution class, the earnings period, lower thresholds and any credit or taper that applies. Rates can also change during a year.
Adding one headline USC percentage to one PRSI percentage can therefore overstate or understate the real deduction. Estimate each charge separately from the correct income base, then add the euro amounts if you want a combined payroll cost.
Pension contributions affect the deductions differently
| Deduction | Ordinary employee pension contribution |
|---|---|
| PAYE Income Tax | Qualifying contribution can reduce taxable pay, subject to relief limits |
| USC | No relief for ordinary employee pension contributions |
| Employee PRSI | No relief for ordinary employee pension contributions |
This is why a pension deduction can reduce PAYE while USC and PRSI remain based on a higher figure. Employer pension contributions and specialist arrangements can have different rules and should be checked separately.
Exemptions are not interchangeable
A person can be exempt from one deduction and liable to another. DSP social welfare payments are exempt from USC, but their Income Tax or PRSI treatment can vary. An employee below the USC annual exemption can still have a PRSI result determined by the weekly class rules.
| Scenario | Do not assume | Check instead |
|---|---|---|
| Low annual income | No USC means no PRSI | Annual USC limit and weekly PRSI rules separately |
| Age 70+ | Reduced USC means the same PRSI treatment | USC age rule and PRSI age/contribution rules |
| Full Medical Card | It changes PRSI | Medical Card affects reduced USC, not the PRSI class by itself |
| Pension income | All pensions are exempt from both | Pension type, provider and the individual’s age/status |
Which calculator or record should you use?
| Need | Best tool or record |
|---|---|
| USC only | USC Calculator and USC guides |
| Employee PRSI only | PRSI Calculator and official Class A tables |
| Full take-home pay | Net Salary Calculator |
| Actual payroll deduction | Payslip, RPN/TCC and Revenue pay details |
| Benefit contribution record | MyWelfare contribution statement or Department of Social Protection |
Frequently asked questions
What is the difference between PRSI and USC?
USC is a tax on relevant income. PRSI is social insurance and contributions can support entitlement to specified benefits.
Are PRSI and USC part of PAYE?
Payroll processes all three, but PAYE Income Tax, USC and PRSI are separate calculations.
How much PRSI and USC do I pay?
Calculate each deduction under its own rules, then add the euro amounts. There is no single percentage that fits every income and PRSI class.
Can tax credits reduce PRSI or USC?
No. Income Tax credits do not directly reduce either deduction.
Can you claim back PRSI and USC?
Overpaid USC can be corrected through payroll or Revenue. PRSI refunds follow separate rules, such as an incorrect class or contribution overpayment.
Does a pension contribution reduce PRSI and USC?
Revenue states there is no employee USC or PRSI relief for ordinary employee pension contributions.
Which deduction pays towards the State Pension?
PRSI contributions, where reckonable, build the social-insurance record. USC does not.
Why can USC and PRSI use different pay figures?
They have different legislation, exemptions, period rules and contribution classes. A deduction allowed for one charge may not apply to the other.
Sources & references
- Revenue: Universal Social Charge overview
- Revenue: Payments and income exempt from USC
- Revenue: Calculating your USC
- Citizens Information: Universal Social Charge
- Revenue: Universal Social Charge overview
- Revenue: Payments and income exempt from USC
- Revenue: Taxation of pensions
- Revenue: Taxation of social welfare payments
- Revenue: Tax relief on pension contributions
- Department of Social Protection: PRSI Class A rates
Related calculators
Use these tools for the numbers behind this guide.