Basel, 29.06.2025

Swiss Mortgages: These Tax Mistakes Cost Homeowners Thousands Every Year

Many homeowners in Switzerland pay too much in taxes simply because they don’t know how to optimise their mortgage from a tax perspective. In our IMMANO podcast, tax expert G. Filipone (Walder & Lehmann AG) explains what really matters when it comes to mortgages in Switzerland.

1. Review your imputed rental value smartly

The imputed rental value is a fictional income that must be taxed. If your property is overvalued, you’re likely paying too much.

Tip: Have the taxable value of your home reviewed regularly – a new valuation can save you money.

2. Amortising your mortgage? Not always wise!

Many think: Paying off the mortgage = good. But: Lower interest = lower tax deductions. If you amortise, you often lose tax advantages.

IMMANO tip: Indirect amortisation via Pillar 3a gives you tax benefits both for your mortgage and your retirement savings.

3. Deduct maintenance costs correctly

For larger expenses, don’t blindly choose the lump-sum deduction. If you list actual costs for value-preserving measures like windows, heating systems, or façade repairs, you can often save more.

4. Energy-efficient renovations = double the benefit

Replaced your heating system? Improved insulation? Many of these measures are tax-deductible and reduce your energy costs long-term.

5. Document value-adding investments

These expenses aren’t tax-deductible immediately – but they reduce the property gains tax when you sell. Keeping receipts is worth it!

Conclusion: Mortgages and taxes are closely linked in Switzerland. If you know the rules, you can save real money.

🎧 Tune in now: “Mortgage Tax Podcast” on Spotify, Apple Podcasts & YouTube: IMMANO