Contact Coastfire.co

Have you found a confusing calculation or a mistake in a guide? You can contact Coastfire.co using the details below.

We cannot use your message to provide personal investment or retirement recommendations. This is not financial advice.

How to reach us

Use the site email for questions about the calculator, page corrections or privacy. No response time is promised.

Reporting a calculator problem

Include the page address, what you expected to happen and what appeared instead. For a numerical problem, explain whether you selected nominal or real return and share made-up inputs that reproduce the issue.

If the problem concerns a saved scenario, say which browser you used and whether the problem began after clearing site data or changing devices. A screenshot can help, but remove personal details first.

Keep sensitive information out of messages

Do not send account numbers, passwords, Social Security numbers or full financial statements. We do not need them to check a formula or improve a page.

Read the calculation method for the model’s assumptions and the privacy notice for information about contact messages.

Model and transparency

Last updated: 6 November 2026. Deterministic annual calculations, not a historical success test. This is not financial advice.

Method and limitations · About the operator · Storage and privacy