How it works
Your target is your essential monthly expenses times the months you want covered: $3,650 a month for 6 months is $21,900. Essential means what you would still have to pay if your income stopped, not your whole budget. Months covered is what you have saved divided by those expenses. Each milestone is reached after the number of monthly deposits it takes to close the gap, rounded up to a whole month, starting next month. The spreadsheet adds a deposit and withdrawal log and a 24-month view.