Savings & Investments
Watch Your Money Grow With Compound Interest
See how a starting amount and monthly contributions grow when interest compounds. Free UK sketch from figures you type, not a product quote.
Your Investment Details
Adjust the values below to see how standard savings grow with the compounding effect over time.
Compounding Frequency
Weezz shows information and estimates from your figures, not financial advice.
Your Projected Balance
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With compound interest, your total investments grow significantly over time.
Investment Growth
Enter your details to see your estimated investment growth over time.
Your Path to Compounding Wealth
We will calculate your compounding progress once you enter your details.
Understanding compound interest
Compound interest adds earned interest back onto the pot, so later growth is calculated on a larger amount.
The power of compounding
The earlier you start, the more time additions have to compound. Small monthly amounts still change the end figure over 10, 20, or 30 years.
Key factors affecting growth
The end figure depends on how often interest is added, the rate, and the length of the term.
Illustration only. Real returns vary with tax, fees, and the product rules.
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Sign upCommon questions
How does the compound interest calculator work?
You enter a starting amount, an annual rate, a compounding frequency, a term, and optional monthly contributions. Weezz projects the end balance, total contributions, and interest earned. Weezz shows information and estimates from your figures, not financial advice.
What does compounding frequency change?
More frequent compounding applies interest more often inside the year. Monthly compounding usually grows a pot a little faster than annual compounding at the same quoted rate. Weezz shows information and estimates from your figures, not financial advice.
Is this a forecast for a specific product?
No. Rates, fees, and tax differ by product and account. Use this as a sketch of how contributions and time interact, not as a quote.