Your annual salary before tax
Total income from your side hustle
Deductible business expenses
Side Hustle Profit
€8,500.00
Additional Tax
€4,240.00
You Keep
€4,260.00
Marginal Rate
49.9%
Understanding side hustle tax in Ireland
Side hustle tax in Ireland
Side hustle income is added to your employment income and taxed at your marginal rate. In Ireland, this includes Income Tax (20% or 40%), USC (Universal Social Charge), and PRSI (Pay Related Social Insurance). Since your PAYE job typically uses up the lower tax bracket, side hustle income is often taxed at the higher 40% rate plus USC and PRSI.
Why does it seem highly taxed?
Your employer deducts PAYE as if your job is your only income. When you add side hustle income, it pushes you into higher tax brackets. The combined marginal rate in Ireland can reach approximately 52% (40% Income Tax + 8% USC + 4% PRSI) on income above the standard rate cut-off point. You must file a Form 11 tax return to declare this income.
Deducting expenses
If your side hustle is a genuine trade, you can deduct related expenses such as supplies, equipment, home office costs, and advertising to reduce taxable profit. You must keep records for at least 6 years. Revenue may request to see these records at any time.
Revenue-Aligned: Uses 2025 Irish marginal tax rates including Income Tax, USC, and PRSI. You must declare all side hustle income in your annual tax return even if tax has not been withheld.
Disclaimer: This calculator provides estimates based on current HMRC rates and thresholds for the 2025/26 tax year. It does not constitute professional tax, financial, or legal advice. Your actual liability may differ depending on your individual circumstances. Always consult a qualified accountant or tax adviser before making financial decisions. Read our terms
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