How to Work Out Compound Interest and SIP Growth

Finance · Step-by-step guide · 6 steps · 2 min read

This calculator shows how your money could grow over time. It works for money you put in once, money you add each month (a SIP), or both.

In the pictures, orange letters like A show where to look. Each step tells you its letter.

Step 1: Type your starting amount

Type the money you start with in Starting amount. Type 0 if you have none. See A in the picture.

Type how much you will add each month in Monthly contribution. This is your SIP amount. See B in the picture.

Type the growth you expect each year in Expected annual return (%). Be careful. Past growth does not promise future growth. See C in the picture.

Set Years invested. You can also add Inflation to see the value in today's money. See D in the picture.

The summary shows the final amount. It shows how much you put in and how much came from growth. See E in the picture.

Press Show year-by-year for a table and a chart. Or press Download CSV to open it in a spreadsheet. See F in the picture.

It is interest on your interest. Each year, your growth is added to your money. So next year's growth is bigger. Over many years, this adds up a lot.

It means you add a bit more each year, for example 10% more. Set it under More options in Annual step-up SIP (%).

Prices go up over time. So money in 20 years buys less than today. The inflation box shows what your result is worth in today's money.

No. It only gives estimates. Real returns go up and down. Taxes and fees are not included.

All the maths happens in your browser. Your numbers are not sent to us or saved.

The Compound Interest & SIP Calculator is free. You do not need an account.