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Compound interest, drawn out year by year

Growth is earned on your original money and on the growth that came before it. Change the rate, the compounding frequency or the time, and the curve responds immediately.

No accountNo bank connectionYour numbers stay on your device
Projected value
€300,851
After 20 years at 7% a year
Paid in €130,000Growth €170,851

57% of the final value comes from growth rather than from money you paid in.

Where the money comes from

PAID IN€130,000GROWTH€170,851YOU PAY IN

Milestones

  • First €25,000Year 3
  • First €50,000Year 6
  • First €100,000Year 10
  • Growth exceeds money paid inYear 17
  • First €250,000Year 18
€0€100k€200k€300k0y5y10y15y20y
Projected value grows from €10,000 to €300,851 over 20 years.
PointProjected valueMoney you paid in
Year 0€10k€10k
Year 2€21k€19k
Year 3€33k€28k
Year 5€46k€38k
Year 6€61k€47k
Year 8€77k€56k
Year 9€96k€65k
Year 11€116k€74k
Year 12€139k€83k
Year 14€164k€93k
Year 15€192k€102k
Year 17€224k€111k
Year 18€258k€120k
Year 20€297k€129k
Projected valueMoney you paid in

Growth overtakes the money you paid in during year 17.

Results are illustrative estimates based on the numbers you enter. Actual investment returns, lender calculations, fees and repayment schedules may differ. Compoundly is not investment, lending, tax or debt advice.

How compounding is calculated here

At every compounding date the balance is multiplied by the periodic rate. With a nominal annual rate the periodic rate is the annual rate divided by the number of periods in a year; with an effective annual rate it is de-compounded, so that a full year of compounding reproduces exactly the rate you entered.

Compounding more often raises the effective annual rate, but the effect is smaller than people expect. At 7% nominal, moving from yearly to monthly compounding lifts the effective rate to about 7.23%; moving on to daily adds only a few more hundredths of a percent. Compoundly shows the effective figure under the chart so the difference is never overstated.