ETF Savings Plan Calculator

Net annual return = expected return − ongoing ETF costs
Monthly return = net annual return ÷ 12
Capital after one month = (existing capital + monthly contribution) × (1 + monthly return)
Final value = development of this amount across all months of the investment period
Total contributions = initial capital + sum of all contributions
Investment growth = final value − total contributions
If the savings rate increases annually, the monthly contribution is adjusted after every 12 months.

Example: You start with €10,000, invest €250 per month into an ETF savings plan, assume a 7% annual return, estimate 0.2% annual ETF costs and invest for 20 years. Your portfolio grows not only through your own contributions, but also through long-term compounding. Over longer periods, a large share of the final value often comes from growth rather than from the money you contributed yourself.

The calculator estimates how much your ETF portfolio may be worth by the end of the selected period. It combines initial capital, monthly investing, return assumptions, ETF costs and time horizon in one model. This helps you understand how powerful regular investing can become over many years.

ETF savings plans are attractive because they are simple, flexible and designed for long-term investing. Even smaller monthly amounts can help build meaningful wealth over time. Many investors also value broad diversification and the ability to benefit from compounding across long periods.

Time is one of the strongest drivers of long-term investing success. The longer money stays invested, the longer previous gains can generate additional gains. As a result, the share of portfolio growth in the final value often increases significantly over time.

Even relatively low annual ETF costs can have a noticeable long-term effect. That is why this calculator works with an estimated net return where ongoing costs are subtracted from the expected gross return. This makes the planning more realistic than looking at gross return alone.

Many people increase their ETF contribution over time, for example after salary increases or when other expenses disappear. That is exactly why this input is useful: it creates a more realistic long-term investing scenario instead of a completely fixed monthly plan.

The key insight is the comparison between your own contributions and portfolio growth. This shows whether your result is still driven mainly by your own money or whether returns are already doing a large share of the work. That makes the calculator more useful than a simple final-value output.

This calculator is useful for retirement planning, wealth accumulation, children’s investment accounts, long-term savings goals, financial independence targets and general investing scenarios. It is also helpful if you want to compare different monthly contribution levels, return assumptions or investment periods.