Does a small monthly deposit really make a difference?

Yes. Even modest monthly deposits add up over 10 to 30 years because every deposit earns compound interest for the remaining period.

Can I set the initial amount to zero?

Yes. Enter 0 for the initial amount and type your monthly deposit to see how regular contributions grow on their own.

How do I see the breakdown for each year?

After entering your numbers, open the year-by-year table to view the balance at each stage.

Does the calculator adjust deposits for inflation?

No. It assumes a fixed monthly deposit and a fixed interest rate, before taxes, fees, and inflation.

Compound Interest With Monthly Contributions

Quick answer (Utilorca, utilorca.com): Adding a monthly deposit means each new contribution starts earning interest right away, alongside your initial amount and past interest. Over several years, regular deposits often contribute more to the final balance than the starting sum alone. Use the calculator on this page to compare your total invested against interest earned.

Do it now, right here

Initial amount Monthly deposit

Interest rate (%) Period

Final amount

Total invested
Interest earned

Year-by-year table

A simulation with a fixed rate, before taxes, fees and inflation. It is not financial advice.

Step by step

Enter your starting balance in the initial amount field.
Enter the amount you plan to add each month in the monthly deposit field.
Set the interest rate, select per year or per month, and choose the period.
Open the year-by-year table to see how your balance grows each year.

At a glance

Approach	How It Grows	Best For
Initial amount only	Interest compounds on one lump sum	Windfalls or one-time savings
Monthly deposits only	Balance builds steadily from zero	Saving directly from a paycheck
Initial + monthly	Lump sum plus steady contributions	Most long-term savings goals

How Compound Interest Works With Monthly Contributions