Emergency fund check
How many months of listed expenses your cash covers
Open in Planner ›Carries these numbers into one plan with your other calculators.
Loading the calculator…
Hypothetical illustration only. These numbers are estimates based on your inputs and assumptions, could be completely wrong, and are not financial, investment, tax, insurance, legal, real-estate or retirement advice. Past returns don't predict future results. Important disclosures
Assumptions and limitations
- Months covered = cash you list divided by the monthly total of included expenses. Reference marks at 3, 6 and 12 months are just scale markers.
- Every number is hypothetical and depends entirely on what you enter. Small changes in assumptions can change results a lot.
- Returns are smooth and constant in the single-number projection; real returns vary every year, and real markets can do better or worse than anything shown.
- Inflation is a single constant rate you choose (except in historical replays, which use the actual CPI of each year).
- Growth compounds monthly (or at the contribution frequency) and contributions are made at the end of each period.
- No taxes unless you turn on the simplified tax drag (all positive growth taxed each year at your rate, which overstates tax for buy-and-hold). No fees unless you set one.
- Inputs stay in your browser. Saving uses this device's local storage; a share link contains the numbers you entered, so anyone with the link can see them.
SURVYR. may be wrong. Check every number yourself, and talk to a licensed professional before acting on anything.
Coteau Planning tools are educational calculators. Coteau is not a registered investment adviser, broker-dealer, tax professional, insurance agent or other licensed professional, doesn't manage money, and doesn't sell or recommend any product. Talk to a licensed professional before making decisions. Not investment advice · Important disclosures
Generated · SURVYR. Planning · Hypothetical illustration only, not advice · survyr.app/legal/disclaimer
Get the market emails
Morning Brief (8 AM ET) & Market Close (4:30 PM ET), weekdaysIndexes, sectors, biggest movers, rates, top news, SURVYR. model changes and what's ahead. Free, two short emails each weekday.
Check your inbox to confirm
We sent a link to . Tap it to start your emails. Nothing is sent until you confirm.
Not there in a minute? Check spam, or .
Dev mode No email provider here, so the confirm link is shown: Open confirm link
Free to use. No card, no ads, no auto-renew.
Systematic research · Not investment advice · Hypothetical unless marked Live · Data: Yahoo Finance (15-min delayed), SEC EDGAR, House Clerk · Important disclosures · Contact desk@coteau.app
Coteau 0.9 · Oct 21, 2026