MMA is targeting property and SME risks at the expense of private motor business in 2005.
Marketing and underwriting director Derek Plummer told Insurance Times that the company was seeking "double digit" growth of at least 20% in property and SME lines this year.
In contrast, the insurer was expecting to see its private motor book decline to only 40% of its total premium income at the end of the year, compared to 47% in 2004.
"We need to focus on other areas," he commented.
Plummer said that MMA would be looking to "forge better relationships" with regional commercial brokers.
"We have identified 50 to 60 brokers whom we want to get closer to this year," he said. "We are also looking to crank up existing relationships."
He added: "If we can get it right with 100 brokers we will be hitting our targets."
Plummer said landlord and motor trade products would be added to MMA's e-trading platform Broker Online in four weeks.
The company is also piloting a commercial combined package policy for property-led risks with a small number of brokers, he added.
"We need to get the underwriting right. That will take six months."
MMA's GWP in 2004 was £209m. Its household book amounted to £52m in premium, while its SME business is currently under £10m in premium.