Woman's car insurance premiums increase after she removes male co-driver 1 May, 2021 07:54 AM 3 minutes to read "I said to her, 'I don't want an adjustment on my premium, I want you to look at the matrix you are using.'" Photo / 123rf.com "I said to her, 'I don't want an adjustment on my premium, I want you to look at the matrix you are using.'" Photo / 123rf.com NZ Herald An Auckland woman was shocked to find removing her former partner from her car insurance policies increased her total premiums by hundreds of dollars. After calling Tower Insurance for an explanation she says she was initially told a factor could be because women are considered higher risk.