Errors of Principle
Accounting entries are recorded as per the generally accepted accounting principles. The errors resulting from the violation of the accounting principles are known as errors of principle. This error may occur due to incorrect classification of expenditure or receipt between capital and revenue. This is very important because it will have an impact on financial statements. It may lead to under/over stating of income or assets or liabilities, etc.
For example, amount spent on additions to the buildings should be treated as capital expenditure and must be debited to the asset account. Instead, if this amount is debited to maintenance and repairs account, it has been treated as a revenue expense. This is an error of principle.
Similarly, if a credit purchase of machinery is recorded in purchases book instead of journal proper or rent paid to the landlord is recorded in the cash book as payment to landlord, these errors of principle. These errors do not affect the trial balance.