Docs
How to use Investment Analyzer — from your first account to a retirement plan built around the whole household. Search the docs from the sidebar, or start with a guide below.
Using the app
- Getting startedSign in with Google, create or join a household, and find your way around the two tabs.
- AccountsAccount kinds, who owns one, and what archiving does to the account's history.
- Trades and CSV importEnter a trade by hand, or bring a whole broker history in by file or paste.
- Portfolio and cashThe dashboard, the per-security breakdown, cash balances, and where prices come from.
- Households and the planInvite the rest of the household, hand out roles, and build a retirement plan around them.
- Export and import a householdDownload a household as one JSON file, and load it back as a new one: what travels, what deliberately doesn't, and why an import never overwrites anything you already have.
- Import with an AI assistantTurn a broker export into an importable file: connect an assistant over MCP, or copy a prompt that carries the whole CSV spec.
CSV reference
The plan
- Monte Carlo and scenariosWhere the success percentage comes from, how to read the fan chart, and how to compare two futures.
- Projected success: what's a good number?How to judge the plan's headline percentage: why it reads low for a household that would adapt, what 85% and 70% are worth, and what to change when the bad runs show up.
- Money in, money outEvery lever the plan has, from what you save to the spending smile and the pre-Medicare health insurance bridge.
- Taxes in the planThree account buckets, two tax modes, and what a withdrawal costs depending on where it comes from.
The model
- Assumptions & the market modelThe plan's default returns, volatility and inflation set beside sourced, dated historical and forecast figures — what each number means, which kind of return to type, and how to choose your own.
- Time and the planWhy the plan runs to age 95, how a 15-year plan behaves differently from a 30-year one, and the today's-dollars and calendar conventions behind every figure.
How it's calculated
- How your portfolio is valuedThe valuation arithmetic: positions replayed from your trades, split-adjusted shares against the last known close, cost-basis fallbacks, and the anchor-plus-delta cash rule.
- How the plan is simulatedReal returns, the monthly recurrence, the tax gross-up, required distributions and the percentile bands — every formula with a number worked through it.
- What the model leaves outThe full list of simplifications — flat tax rates, no mortality, no ACA subsidies or IRMAA — each with the direction of the error it introduces.