What is a Deduzione Fiscale?
A deduzione fiscale is a tax deduction — it reduces your taxable income before IRPEF rates are applied to it. This distinguishes it from a detrazione fiscale, which reduces the tax amount itself after it's been calculated.
The practical difference: a €1,000 deduzione saves you between €230 and €430 in tax, depending on which IRPEF bracket applies to that portion of your income (23%, 35%, or 43%). A €1,000 detrazione saves you exactly €1,000 regardless of bracket. This means deduzioni are more valuable the higher your marginal rate — a high earner in the 43% bracket gets more from a deduzione than a lower earner in the 23% bracket.
How Deduzioni Work
After calculating gross income, deduzioni are subtracted to arrive at taxable income (reddito imponibile). IRPEF rates are then applied to this lower taxable income figure. The result is your gross IRPEF, before detrazioni are applied.
Main Deduzioni Available
Social security contributions (INPS): The most significant deduzione for most self-employed individuals. All mandatory INPS contributions — whether Gestione Separata contributions, artisan/trader fund contributions, or contributions to professional funds — are fully deductible from taxable income. For employees, employee-side INPS contributions are already deducted before gross income is calculated on your payslip.
Supplementary pension contributions: Contributions to a supplementary pension fund (fondo pensione) are deductible up to €5,164.57 per year. This is one of the most tax-efficient savings instruments available in Italy — for a 43% bracket taxpayer, the maximum contribution saves over €2,200 in tax annually.
Charitable donations: Donations to recognized non-profit organizations, ONLUS, and certain other entities may be deductible, typically up to a percentage of income or at capped absolute amounts, depending on the recipient organization's classification.
Disability-related medical expenses for dependents: Certain healthcare costs for disabled dependent family members are fully deductible (rather than the 19% credit available for standard medical expenses). This is a more favorable treatment than the standard medical expense detrazione.
Business expenses for self-employed: Self-employed individuals in the ordinary regime (not forfettario) deduct actual business costs — equipment, professional services, office costs, software — from their professional income before the income enters the IRPEF calculation. This is different from a "personal" deduzione but achieves the same effect of reducing taxable income.
Alimony payments: Regular maintenance payments to a former spouse under a court order are deductible from income.
Deduzioni vs. Detrazioni: Choosing Wisely
Both reduce your final tax burden, but they operate at different stages:
- Deduzione: Applied to income → reduces the taxable base → lower IRPEF is calculated
- Detrazione: Applied to the calculated IRPEF → reduces the final tax bill directly
For tax planning purposes, maximizing supplementary pension contributions (a deduzione) is generally highly effective for anyone in the 35% or 43% IRPEF bracket. The tax saving is immediate and the contribution also builds long-term retirement savings.
Your commercialista should review both deduzioni and detrazioni available to your situation each year — the combination of the two determines your effective tax rate.