Items that will increase your bill:
significant investment activity. $50 - $200 depending on complexity
Significant capital asset activity $25-$200 depending on complexity
Loans to/from your company (not typical shareholder loans) $50-$100 depending on complexity
This may be loans at the CRA perscribed rate to a shareholder
This may be loans from banks
Messy/unorganized books $50 - $200 depending on work needed to get information organized
This will only be applied if it causes the file to be significantly delayed