John is an Irish resident and domiciled individual, who earns €50,000 as a higher rate taxpayer. John earned an additional €30,000 in deposit interest from a US bank. The deposit income is taxable.
Since the income is from a non-EU source, and this income is above the standard rate cut off point, it is taxed at the higher rate of 40% and marginal rate of tax. John's total tax liability on the €30,000 is €12,000 (€30,000 x 0.4 = €12,000).