Managing your accounts can be time consuming and frustrating. It can also be expensive, because not keeping books up to date invariably means higher fees to your accountant when your tax year-end comes along.
Let's face it, it makes sense to outsource anything that takes up a disproportional amount of time relative to the benefits. Sure, you could do it yourself - but shouldn't you be working ON your business instead of IN your business?
Good accounts are good for business
A well maintained set of accounts allow for the generation of useful sets of reports, so you can see exactly where the money is coming from and exactly where it's going.