It is easy to calculate normal monthly expenses by tracking your
expenditures over the course of 30 days. The problem is that many
people then use these numbers for planning purposes, and are then
surprised when things like car insurance or property tax bills
pop up unexpectedly. A better way to deal with these "hidden
expenses" is to calculate them ahead of time and handle them
on a monthly basis just like any other bill. Each month simply
set a fixed amount of money aside in a separate account to pay
for hidden expenses when they pop up.
The calculator below will help you to discover all of your hidden
expenses. Its goal is to try to remind you of all of the different
bills that crop up just once or twice a year. The calculator will
determine a total amount due for all of these hidden bills
and then divide that amount by twelve to give you an
accurate monthly set-aside number.