CompoundWise is a free compound interest calculator built for UK savers and investors. Our goal is to help people understand the power of consistent saving and compound growth through interactive tools, visual charts, and plain-English educational content.
We believe that financial literacy should be accessible to everyone, and that understanding how compound interest works is one of the most valuable things you can learn about money.
CompoundWise was created by a UK-based team with backgrounds in software engineering and personal finance. We built this tool because we wanted a clean, fast, no-nonsense compound interest calculator that actually explains what the numbers mean — something that didn't exist in the way we wanted it.
We are not financial advisers. We are builders and educators who use these same tools to plan our own savings and investments. Everything on this site reflects our genuine effort to make financial maths accessible, not to give personalised recommendations.
All content on CompoundWise follows these principles:
This website does not provide financial advice.
CompoundWise is not authorised or regulated by the Financial Conduct Authority (FCA). All calculator outputs are estimates based on hypothetical assumptions and are for illustrative purposes only. Past performance does not guarantee future results. Capital is at risk when investing.
The information on this website is for general educational purposes only and does not constitute a personal recommendation or advice. Tax treatment depends on individual circumstances and may change in the future.
If you need advice tailored to your personal circumstances, please consult an FCA-authorised independent financial adviser.
CompoundWise is free to use. We earn revenue through affiliate links to investment platforms featured on our site. When you click an affiliate link and open an account, we may receive a commission at no extra cost to you.
Affiliate relationships do not influence our calculator outputs, educational content, or scenario descriptions. The selection of platforms shown may be influenced by commercial relationships. We clearly label affiliate links throughout the site.
We would love to hear from you. Whether you have a question, feedback, or notice an error, you can reach us at:
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