After-Tax Engineering

Tools

Calculators

Each calculator is a full decision page — not just a widget. Inputs, results, assumptions, risks, and a worked example. The goal is a defensible decision, not just a number.

Core tax & investing tools

The primary after-tax decision tools — aligned with the Learning Path Stages 1–3.

Real estate tools

Stage 4–5 decision tools for rental property analysis, depreciation, and exit planning.

Portfolio & advanced tools

Specialized tools for portfolio deployment decisions and advanced estate planning.

How these calculators are designed

A calculator that only shows the upside is a sales pitch. Every tool here includes:

  • Warning flags for positions that only work because of the tax benefit
  • A clear list of what the calculator cannot account for
  • When to stop calculating and call a CPA
  • Honest comparison to the index benchmark alternative