An insurer is trying to appeal to prospective employers that worry about falling for unrealistically low, first-year “come on” rates.

Guardian Life Insurance Company of America, New York, has introduced the Guardian Premium Protect program, a health insurance program for groups of 51 to 150 employees that locks in second-year rate increases at less than 10%.

To qualify for the guarantee, participating employers must agree to meet minimum employee cost-sharing requirements, Guardian says.

Guardian will be selling the program in the District of Columbia, Maryland, New Jersey and Virginia, and in the Chicago and New York City areas.