Compound interest & savings

Calculate how an initial CHF investment and monthly contributions grow over time with monthly compounding.

Direct answer

With monthly compounding, a CHF 10,000 starting balance plus CHF 500 per month at a 4.0% annual return grows to CHF 198,125 over 20 years (CHF 130,000 contributed plus CHF 68,125 compound growth).

Key statutory figures & facts

  • •Compounds monthly: monthly rate = annual rate ÷ 12
  • •Separates your cash contributions from compound growth
  • •Works for Pillar 3a equity funds, ETF savings plans and cash accounts
  • •Supports 1 to 80 year horizons

How it's calculated

  1. Monthly rate = annual rate ÷ 12.
  2. Each month: balance × (1 + monthly rate) + monthly saving.

Assumptions

  • The return is constant and an assumption, not a forecast.
  • No wealth tax, custody fees or inflation deducted.

Frequently asked questions

Are capital gains on private ETF and stock investments taxed in Switzerland?
For private investors (Privatvermögen) who are not classified as professional securities dealers, capital gains on stocks and ETFs are tax-free in Switzerland, while dividends and interest are taxed as ordinary income and subject to 35% reclaimable Swiss withholding tax (Verrechnungssteuer).
Is the return guaranteed?
No. You choose the rate; real market returns fluctuate.