William Mattar’s net worth remains private as of 2026, and no public figure has been officially verified. He earns income through his personal injury law practice as the founder of William Mattar Law Offices, where the firm handles motor-vehicle accident cases on a contingency-fee basis. Specific personal salary or earnings figures are not publicly disclosed.
Specializing in Motor Vehicle Accident Cases to Fuel Growth
William Mattar founded his eponymous law firm in 1990 in Williamsville, New York. From the beginning, he focused the practice exclusively on motor-vehicle crash cases, including car, truck, and motorcycle accidents. He has credited that specialization with helping drive the firm’s growth.
Over more than 35 years, Mattar built the office into what official materials call “New York State’s largest motor vehicle accident law firm.” The firm says it has “represented tens of thousands of people injured in motor vehicle accidents” across New York. A high volume of motor-vehicle accident cases has remained central to its business.
Contingency-Fee Model: Earning from Client Settlements
William Mattar Law Offices operates on the standard contingency-fee model used in personal-injury cases. Under New York law, attorneys typically receive a percentage of each settlement or verdict instead of charging upfront fees. The firm explains that clients pay nothing unless they recover damages.
New York bar association guidance generally puts contingency fees in injury cases at around one-third, or 33%, of the award. The firm’s revenue therefore comes from its share of major injury settlements, tying its income to successful case outcomes.
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Williamsville HQ: Building and Expansion Investments
William Mattar P.C. has invested heavily in its home office infrastructure. In 2005, the firm built a custom headquarters at 6720 Main Street in Williamsville. By 2014, the practice had grown to roughly 90 employees, outgrown the original space, and purchased the adjacent building. The expanded office was completed in early 2015. Those construction and real-estate investments kept the firm’s Williamsville base at the center of its continued growth.
Opened Rochester and Syracuse Offices to Increase Footprint
The firm expanded beyond Buffalo to broaden its market. William Mattar, P.C. opened offices in Rochester and Syracuse. Those locations, along with the Williamsville headquarters and others, including Albany intake, extend the firm’s reach across upstate New York. Public filings list the firm as employing more than 120 people statewide, making it a sizable enterprise with client services across multiple cities.
