Last updated: September 2026
By using PennyWise Calcs you agree to the terms below. They are written in plain English on purpose: a document you cannot read is not much of an agreement.
These calculators are free educational tools. They do arithmetic on the numbers you enter. They do not know your situation, and using them does not create any professional relationship between us.
Nothing on this site constitutes financial, tax, investment, legal, or accounting advice, and nothing here is a recommendation to buy, sell, borrow, lend, or hold anything. The calculators show the mathematical consequences of assumptions you choose. Real outcomes depend on factors no calculator can see, including tax situations, local rules, credit terms, market returns, and changes in your life. Before acting on any result, consult a qualified professional who knows your full circumstances.
We work to keep formulas correct and defaults current, and we document the formula behind every result so you can check it yourself. Even so, results are estimates, not guarantees. Projections that run for decades, particularly those involving investment returns or inflation, are illustrations of a scenario. Rounding, tax treatment, and the specific terms of your accounts or loans can all shift the real number.
You may use this site for personal, non-commercial purposes, and you may link to any page. You may not copy the site wholesale, republish its content as your own, or use automated tools to scrape it at a volume that degrades service for other visitors. Every calculation runs in your browser, so your inputs are never transmitted to us.
This site may display advertising and may link to third-party sites. We do not control the content of those ads or sites, and a link is not an endorsement. Advertising partners may use cookies as described in our privacy policy. Any dealings you have with an advertiser or a linked site are between you and that party.
The site is provided as is and as available, without warranties of any kind, express or implied, including merchantability and fitness for a particular purpose. To the fullest extent allowed by law, we are not liable for any loss or damage arising from your use of the site or from reliance on a result it produced.
We may update these terms as the site changes. When we do, the date at the top of this page changes. Continuing to use the site after an update means you accept the revised terms.
Questions about these terms can be sent to [email protected], or through the details on our contact page.