COLUMBIA — Gov. Nikki Haley is heading to Graniteville to promote South Carolina’s new unemployment insurance law.

Haley will hold a ceremonial bill signing of a measure that changed the way businesses are charged for their unemployment insurance at the Bridgestone Americas Inc. plant in Graniteville.

Legislators had overhauled the state’s unemployment insurance system in 2010 to stop shortfalls that had forced the state to borrow nearly $1 billion to keep unemployment checks paid.

But employers complained the changes increased their premiums too much and legislators made changes.

Legislators also used unexpected state revenue increases to lower charges.

Employers can get refunds or apply overpayments to future bills.