C corp taxes in Delaware are taxes companies pay to the state. Companies that choose to become a C corp, also known as a C corporation in Delaware are subject to a flat 8.7% tax rate. This means that any profits they make in Delaware will be taxed at 8.7%. The Delaware tax rate is one of the lowest in the US, so it can be a good place for businesses to set up shop. However, it's important to note that taxes on income from other states may still need to be paid in those states.