€300 a month in a bank account. €68 a month in the S&P 500. Since 2009, both end up in the same place: about €63,500. The question isn’t how much you earn — it’s how much you have to put in from your own pocket to get there.
Same destination, two very different starting points
Picture two people who start saving in January 2009 and keep doing it, month after month, for 17.6 years (212 contributions in total). One puts €300 every month into a bank account earning no interest. The other puts €68 every month into a fund tracking the S&P 500, in euros and with dividends reinvested. Today, both accounts are worth practically the same: about €63,500.
Same result, very different contribution
Bank account — €300/month × 212 months = €63,600 contributed, €0 in returns
S&P 500 — €68/month × 212 months = €14,416 contributed, the rest is accumulated return
Final value of both — roughly €63,500
Four and a half times less capital
To reach the exact same number, the bank saver had to put in €63,600 out of pocket. The S&P 500 investor put in €14,416. That’s roughly 4.4 times less capital to end up in the same place. The difference — over €49,000 — came from the market, not your paycheck.
Put in daily terms, the S&P 500 contribution works out to roughly the price of a coffee. That doesn’t mean it’s “free” or that it requires no discipline — 212 consecutive months is more than 17 years of contributions without missing one — but it helps put the comparison against the €300 monthly scenario into perspective.
What if the bank paid more than 0%?
The baseline scenario assumes the bank account pays no interest at all, which is typical for a basic checking or savings account. But even if it weren’t, the difference is still enormous. At 1% annual interest, you’d need around €75 a month to reach the same destination. At 2%, around €82 a month. Either way, that’s still far from the €300 a month required by the non-interest-bearing account.
How much you’d need to contribute monthly to reach the same ~€63,500
Account at 0% interest — €300 a month
Account at 1% interest — around €75 a month
Account at 2% interest — around €82 a month
S&P 500 (2009-2026 historical) — €68 a month
Not even doubling the interest-bearing account’s rate gets the figure close to what the market has done over this specific period.
Where these numbers come from
The calculation uses the S&P 500’s actual performance in euros, with dividends reinvested, over 212 consecutive monthly contributions — that is, 17.6 years, from 2009 to today. It’s a periodic-contribution exercise (DCA), not a lump-sum investment: the same amount goes in every month, regardless of which way the market moves.
This exercise connects with others we’ve already covered on the channel, like comparing investing every month versus waiting for a crash or the IBEX 35 versus the S&P 500 since 2009. If you want to run your own numbers and follow live prices, ProRealTime has the tools for that.
Past performance doesn’t guarantee future returns. This exercise compares a real, verifiable historical period, but it isn’t a suggestion about what to do with your savings. The goal is purely educational: to show how periodic contributions of very different sizes can reach the same destination depending on where the money is placed.
Conclusion
€300 a month in a non-interest-bearing account and €68 a month in the S&P 500 have reached the same place over the last 17.6 years: about €63,500. The difference isn’t in the destination, but in the effort needed to get there — 4.4 times less capital contributed in the second case. Not even raising the account’s interest rate to 1% or 2% substantially changes the conclusion. Over this specific period, the market has done a job that no ordinary interest-bearing account could match.
