I use a Bank of American Visa credit card that accrues airline miles for both personal expenses and business expenses. However, when it comes tax time, it's a burden to separate out which transactions were personal expenses and which were business expenses.
The simple solution for this problem would be to just open another credit card account and use one account for personal expenses and the other for business expenses. However, my airline card comes with a hefty annual fee (that I'd rather not pay twice) and I'd prefer to avoid the credit ding associated with opening another credit account.
Can anyone recommend a 'minimal-effort' method to separate out personal vs business transactions on a single credit card account?