Unless there is a tax related purchase, you should keep the statement for seven years. Otherwise, there is no need to keep the statement any longer than 60 days. As with banks, you could get statements online too. Though again, most only go back a certain number of years.’ve decided to write a post on how long to keep financial statements: what you need to keep, for how long, and some of the reasons why you need to do so. As an added bonus, I created a financial statements checklist in PDF which you can download for free.