Your energy works, 100% deductible. But not for long.
Following the September 28, 2025 federal vote, the tax deduction for energy renovations will be removed from January 1, 2029 at federal level. Use the current window to save up to 30% of your project's real cost.
Understand
The situation at a glance
Today
100% deductible
Energy works fully deductible from taxable income. Grants stackable with the deduction.
Your window
2026 · 2027 · 2028
Plan your works in this period to benefit from the full tax leverage.
From 2029
No more federal deduction
Federal deduction removed. Partial cantonal maintenance possible.
Before 2029 vs After 2029
| Type of works | Before 2029 | From 2029 |
|---|---|---|
| Maintenance | Déductible | Not deductible |
| Energy renovation | Déductible | Not deductible |
| Heat pump | Déductible | Not deductible |
| Photovoltaic | Déductible | Not deductible |
Concrete case
Nyon family — HP + PV
20-year balance
Cumulative energy savings: 84,000 CHF · Net benefit: +30'280 CHF
100% deductible works today
All these installations qualify as energy saving and environmental protection measures.
Pompe à chaleur
air-eau / géothermique
Photovoltaïque
panneaux + onduleur
Solaire thermique
ECS + appoint chauffage
Stockage d'énergie
batteries domestiques
Timeline
A 3-year window
- 28 sept. 2025Votation acceptée à 57,7%
- 1er avril 2026Conseil fédéral confirme 2029
- 2026 - 2028VOTRE FENÊTRE D'OPPORTUNITÉ
- 1er janvier 2029Nouvelles règles en vigueur
- 2029 - 2050Période transition cantonale
FAQ
Tax disclaimer. Tax information shown is indicative and based on current provisions. Each situation is specific — we recommend consulting a tax advisor to validate your tax optimization plan. Sources: September 28, 2025 federal vote, Swiss Federal Tax Administration, Federal Council, UBS, CGI Geneva, FBK Conseils, hausinfo.ch, taxea.ch.