Some banks offer a challenge called the "1 penny everyday challenge". What this challenge does is it takes 1 penny from your current account on day 1. Each day increases by 1 penny. So day 2 is 2p, day 3 is 3p taken etc and so forth all the way up to day 365.
The aim of this is to stop you spending money every month by taking alittle away from your account on a daily basis. The result? £667.95 will be waiting for you at the end of the challenge if you saved every day!
This calculator helps you to know how many pennies will be taken from your account in any given month.