He had a rice and indigo plantation known as Snee Farm along the Wando River, about nine miles from Charleston, and a townhouse on Queen Street in the city.
After the war, to penalize his Loyalist oath, the state legislature assessed a fine against Pinckney based on the value of his property.
His son and namesake Charles Pinckney inherited the plantation and slaves and became a prominent politician after the American Revolution.
William had joined his older brother, Charles Pinckney, in setting up "the first fire insurance company in America, the Friendly Society.
After the war, in February 1782, the South Carolina legislature voted a 12% amercement, or fine, against Colonel Pinckney's property to punish him for his switch of allegiance.
On his death in 1782, Pinckney left the Snee Farm plantation and its slaves to Charles, his oldest surviving son.
She was a daughter of his uncle Robert Brewton, a goldsmith who was associated with banking and financial circles in the city, and Mary Loughton, a widow.
[2] In 1782, the younger Charles Pinckney inherited Snee Farm, the rice and indigo plantation, and its numerous enslaved African Americans at his father's death.