Speeding penalties vary from city to city and are often increased by court costs. However, the minimum fines for speeding under South Carolina state law are as follows:

Under 10 miles per hour over posted speed limit: Fine between $15 and $25
Between 10 and 15 miles per hour over posted speed limit: Fine between $25 and $50
Between 15 and 25 miles per hour over posted speed limit: Fine between $50 and $75
Excess of 25 miles per hour over posted speed limit: Fine between $75 and $200 or up to 30 days imprisonment.

S.C. Code Section 56-5-1520.