Hi. The owner of a single-member LLC borrows 12k to his company, adding the 12k to the business checking account through a check. How do I record the banking transaction connected with that? The money will be used in a few weeks.
That's Owners Equity. Here is an article on how to record that.
Here is an article on how to record paying back that investment by the owner.
Alright then the other thing you can do is create a liability account called "Loans From Owner" or something similar.
If it will be paid back 12 mo or less, Other Current Liability. If it will take longer than 1 year to pay back, Long Term Liability.
Record the deposit into the back and offset the liability account. That way on your balance sheet it shows as a liability to the owner.
For recording paying it back, cut a check to the owner and offset the same liability account to lower the balance owed on the loan.