How does firm size affect malpractice premiums?

Firm size influences malpractice insurance premiums through several mechanisms, including risk diversification, administrative efficiencies, and the underwriting approach used by carriers for different firm segments.

Solo practitioners typically face the highest per-attorney premiums. A solo attorney might pay between $3,000 and $8,000 per year depending on practice area and location. This higher relative cost reflects the concentrated risk profile of a single-attorney practice. There is no diversification across practice areas or attorneys, and the departure or disability of the sole practitioner creates coverage complications.

Small firms of two to ten attorneys begin to benefit from risk spreading. If the firm includes a mix of practice areas, the lower-risk areas help offset the higher-risk ones, resulting in a blended rate that is often more favorable. Carriers also view multi-attorney firms as somewhat lower risk because they tend to have better internal systems for conflict checks, deadline management, and peer review.

Mid-size firms of 11 to 50 attorneys typically enjoy meaningful per-attorney premium reductions. These firms usually have formal risk management programs, dedicated administrative staff for compliance and intake, and more sophisticated technology infrastructure. Carriers reward these characteristics with lower rates. Mid-size firms also have more bargaining power to negotiate policy terms, endorsements, and pricing.

Large firms of 50 or more attorneys often work with specialty brokers and may access coverage through different underwriting channels than smaller firms. Their premiums are individually rated based on detailed submission data, claims history, practice area breakdown, geographic footprint, and risk management practices. The per-attorney cost can be significantly lower, but the total premium is substantial due to the number of attorneys and the higher policy limits required.

Regardless of firm size, every firm can take steps to manage premium costs. Implementing formal risk management programs, maintaining clean claims histories, selecting appropriate deductible levels, and working with a broker who specializes in lawyer's professional liability can all contribute to more favorable pricing. Some carriers offer specific small-firm programs designed to provide competitive rates to practices with five or fewer attorneys.