BillCalc

Build bills, incomes, and due dates from a static page. Add rows, tune ranges, and forecast your balance without any server.

GitHub Pages ready Static HTML + JS Local autosave Low / Base / High forecasts
Starting balance
$0.00
Safe target
$0.00
Target hit
--
Month end
--
Purchase day
--

Inputs

The purchase planner picks the first date that keeps you above the safe target through month end, then shows that purchase in the forecast events.
Tip: amount can be your expected value, and range low/high can reflect uncertainty. For bills, the low forecast uses the higher amount.

Bills

Name Kind Repeat Amount Low High Weekday Day Date
Recurring rows support weekly and monthly bills, plus one-time charges.

Weekly Forecast

Week ending Low Base High Events

Daily Forecast

Date Day Low Base High Events