Insights

Notes from the den on math you can actually use

Short, concrete pieces about the decisions behind our tools: pensions, company numbers, and how to tell a good model from a confident one.

Coming soon. Titles below show the kind of writing we plan to publish. The articles are not live yet, and the cards do not open.

Personal finance7 minDraft #01Coming soon

Why your pension choice is a math problem, not a paperwork problem

The RPM vs RAIS decision is usually made by whichever advisor called first. A replacement-rate curve makes the real trade-off visible.

Not yet published

Business6 minDraft #02Coming soon

Five ratios that explain most small businesses

You do not need forty indicators. You need the handful that move together when something is going wrong, and to know which one moved first.

Not yet published

Method9 minDraft #03Coming soon

What a simulator is actually doing when it gives you a number

A look inside the assumptions, the compounding and the rounding. If a tool cannot show you this, be careful with the number.

Not yet published

From the den4 minDraft #04Coming soon

From the den: how we decide what to build next

Every tool starts with a decision people make badly because the math is hidden. Here is the checklist we use before writing code.

Not yet published

Have a decision you suspect is a math problem?

Send it in. The ones we cannot stop thinking about become posts, and sometimes tools.

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