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Effective Tax Rate
Total tax paid divided by total gross income. Always lower than the marginal rate.
The effective tax rate (taxa efectiva de imposto) is the percentage of total gross income actually paid as tax, after all deductions, credits, and special regime benefits are applied. It is calculated by dividing total IRS due by total gross income. Because Portugal's IRS uses progressive brackets, most of a taxpayer's income is taxed at rates below the top bracket — meaning the effective rate is always lower than the marginal rate. For example, a taxpayer with €60,000 gross income and €10,500 IRS due has an effective rate of 17.5%, even though their top marginal rate is 35%. Understanding both rates is essential for comparing regimes: IFICI's 20% flat rate is actually an effective rate of exactly 20%, which may be higher or lower than the standard IRS effective rate depending on income level and deductions.
Example
Taxpayer: €50,000 gross, €9,200 IRS due (after deductions). Effective rate = 18.4%. Marginal rate = 35%. The IFICI 20% flat rate would cost this taxpayer €10,000 — slightly more than standard IRS in this case.
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