What is the penalty added to the amount of tax due if it is not paid within thirty days?

The penalty associated with the failure to pay the tax due within thirty days is indeed ten percent. This penalty is a common provision in tax regulations to encourage timely payment and compliance, establishing a financial consequence for delays. The rationale behind this percentage is likely designed to be substantial enough to prompt taxpayers to fulfill their obligations promptly while remaining proportionate to the amount of tax owed. A ten percent penalty serves as a deterrent against late payments, ensuring that individuals and businesses understand the importance of adhering to tax deadlines to avoid additional financial burdens.