Up to and including 2000 pounds overweight, the fine is $100
From 2001 through 2500 pounds overweight, the fine is $270
From 2501 through 3000 pounds overweight, the fine is $330
From 3001 through 3500 pounds overweight, the fine is $520
From 3501 through 4000 pounds overweight, the fine is $600
From 4001 through 4500 pounds overweight, the fine is $850
From 4501 through 5000 pounds overweight, the fine is $950
From 5001 or more pounds overweight, the fine shall be computed by assessing $1500 for the first 5000 pounds overweight and $150 for each additional increment of 500 pounds overweight or fraction thereof.
In addition, any person, firm, or corporation convicted of 4 or more violations of Section 15-111 within any 12 month period shall be fined an additional amount of $5,000 for the fourth and each subsequent conviction within the 12 month period. Provided, however, that with regard to a firm or corporation, a fourth or subsequent conviction shall mean a fourth or subsequent conviction attributable to any one employee-driver.
625 ILCS 5/15-113