“Today, there's no question law firms are operating in an intensely competitive landscape,” said Garczynski. “The imperative for survival and the drive for growth are leading to more firm mergers and the hiring of attorneys from other firms. Unfortunately, these initiatives often bring greater risks.”

Five of the seven insurers surveyed attributed the rise in claims to mergers and lateral hires (those who work for former clients while employed at a new company), and an equal number ranked “conflict of interest” as their first- or- second- most frequent malpractice claim. At least one insurer cited “failure to know/properly apply law” and “failure to file [on time]” as their most frequent alleged error.

The real estate industry was the greatest malpractice-claim generator in the study for the third year in a row, followed by corporate business organization and securities and estates.

The spike in claims is taking a toll on insurer capital: in 2012, six companies increased the rates they pay their defense counsel. Four of seven now pay $300 to $401 per hour for defense counsel, while in 2011 only two paid this rate.

Garczynski said that in 2008 and 2009, Legal Malpractice insurance was commonly written at a steady rate with comfortable capacity, but due to claims volume the rates for this coverage are now rising by 7 to 10 percent.

“While the lawyers' professional liability landscape and the claim environment continue to evolve, one thing is certain,” Garczynski said. “Solid risk management and active claims monitoring are more critical than ever and can pay off – both in terms of helping firms reduce the likelihood of malpractice suits and keeping rising insurance costs under control.”

Garczynski advises, “Ask attorneys for documentation of their former firm's insurance coverage. Make sure they report any potential claims related to their prior work to their former firm's insurer. And be sure they disclose fully any past work or carry over work when joining their new firm.”