One person, one inbox, no ticket queue
Contact
FinancialDepth is built and maintained by a single developer, and that same person reads every message. There is no support team, no chatbot, and no contact form that disappears into a CRM — just an email address that works.
Reporting a calculation error
This is the message we most want to receive. Every calculator here is a formula someone wrote by hand, and hand-written formulas can be wrong. If a result looks off, we would rather hear about it than have it sit there misleading people.
A report is far easier to act on when it includes three things: the page URL, the exact inputs you used, and the number you expected instead. With those, the error can usually be reproduced in minutes. Without them, most of the reply is spent guessing at your scenario.
Confirmed errors get fixed and the affected page's "last updated" date is changed, so the correction is visible rather than silent. If a mistake turns out to have been live for a meaningful period, that gets noted on the page too.
Asking how a number was produced
Every tool is meant to show its working, and the methodology page documents the formulas, data sources, and assumptions used across the site. If a figure still does not reconcile with what you calculated yourself, the difference is usually one of four things: whether inflation is applied, whether returns are real or nominal, whether contributions are assumed at the start or end of a period, and whether the result is in today's dollars or future dollars. Say which convention you were using and the gap normally resolves quickly.
Requesting a tool
Requests genuinely influence what gets built next. Several of the tools now on the site started as a reader describing a decision they were stuck on. The ones that get built tend to share a trait: there is a specific calculation involved, and the existing tools on the internet either skip an edge case or hide their assumptions. If that describes your situation, describe the decision rather than the tool — the shape of the calculator usually follows from it.
Data, sources, and press
Questions about where a dataset came from, requests to cite a figure from this site, or corrections to a source attribution are all welcome at the same address. Historical market data, safe-withdrawal-rate research, and government spending statistics used on this site are attributed on the pages that use them and summarized on the methodology page.
Privacy and data requests
Because the calculators run entirely in your browser and the site has no accounts, there is normally no personal data held about any visitor. If you want to confirm that, or ask for deletion of an email thread, send the request to the same address. The privacy policy sets out what is and is not collected.
What we cannot do
We cannot tell you whether to retire, which fund to buy, whether to pay off your mortgage early, or how a rule applies to your tax situation. That is not modesty — it is that personalized advice requires knowing your full circumstances and carries professional obligations this site does not take on. The tools are built to help you reason about trade-offs and then take a better-informed question to someone qualified. The disclaimer spells this out in full.