Tax credits come in two flavours: non-refundable credits can reduce your tax bill to zero but no further, while refundable credits can produce a cheque from the tax office if they exceed your liability. Common credits in Europe include the French crédit d'impôt for home services (up to 50% of qualifying expenses), Italy's bonus mobili (50% on furniture for renovated homes) and Germany's Kinderfreibetrag/Kindergeld system.
Switzerland uses fewer tax credits than its neighbours, relying more on deductions and exemptions. Federal direct tax provides a small per-child deduction rather than a credit. The 35% Verrechnungssteuer on Swiss dividends is technically a credit against the final tax liability.
Credits can be the most powerful tool in tax planning, especially when refundable. Energy-efficiency credits (heat pumps, solar panels) in France, Italy and Germany routinely cover 30–65% of project costs and are stackable with regional grants.
A French homeowner installs solar panels for EUR 12,000. They receive a 30% tax credit (EUR 3,600) directly applied against their income tax. Compared to a deduction at the 30% bracket, the credit is worth EUR 2,520 more.