The present invention is a phosphate-free automatic dishwashing agent containing a builder, said agent comprising: a) a copolymer A comprising i) at least one mono- or polyunsaturated carboxylic acid monomer, ii) at least one mono- or polyunsaturated sulfonic acid monomer, and iii) at least one additional nonionic monomer; and b) an acrylic acid homopolymer B, wherein the weight ratio of copolymer A to homopolymer B is between 10:1 and 1:3. The present agent is characterized by excellent residue inhibition, good cleaning, and clear rinsing performance in automatic dishwashing.