How this calculator helps
The classic challenge begins with £1 in week one, then rises by £1 each week until week 52. You can change the starting amount and weekly increase to suit your budget.
Before you decide
The increasing weekly amount can become demanding towards the end of the year. Try a smaller increment if that would be more manageable.
A practical example
Starting at £1 and adding £1 each week gives £1,378 across 52 weeks. Starting at £2 with no increment gives £104.
Frequently asked question
Can I start midway through the year?
Yes. Your week one can begin whenever you like; the numbers are based on 52 contributions, not the calendar year.
What next?
Change the figures and see the estimate update instantly. For another practical check, browse our free tools library or try the daily challenge.