A design firm principal reads the declarations page, sees a $2 million limit, and reasonably concludes the firm is protected up to $2 million. On almost every architects and engineers professional liability policy written in 2026, that conclusion is wrong — and the gap between the number on the page and the protection behind it is widening.
The structure almost every A&E policy shares
Nearly all A&E professional liability is written with defense costs inside the limit — often called defense within limits, or a cannibalizing limit. Under this structure, every dollar the insurer spends defending a claim reduces the limit available to pay a judgment or settlement. This is not a loophole or a fine-print trick; it is the standard architecture of the line, and it is fundamentally different from how a general liability policy works, where defense is typically paid in addition to the limit.
The consequence shows up in the only place it matters — a real claim. A firm with a $2 million limit that spends $700,000 defending a complex construction-defect suit has $1.3 million left to resolve it, not $2 million. Design claims are expensive to defend precisely because they turn on the standard of care, which means expert witnesses, competing analyses, and years of litigation. On a hard-fought claim, defense costs can consume a quarter, a third, or more of the limit before a dollar reaches the claimant. The limit erodes from the inside while the exposure stays the same size.
Why the math is getting worse
Two trends are pulling in opposite directions, and the firm is caught between them. On one side, the severity of A&E claims has outpaced general inflation, driven by the same social inflation reshaping the broader casualty system — aggressive litigation and larger verdicts. On the other, the limits clients demand keep climbing: owners increasingly require $10 million or more in professional liability on mid-sized projects, far above what a single firm's fee on that project could ever justify. Design firms report, plainly, that the liability they are asked to absorb is growing much faster than their design fees.
Capacity has tightened at the same moment. Single carriers are scaling back the limits they will put on one risk, which forces firms to build expensive multi-layered towers across several carriers to reach the limit a contract requires. And a majority of leading professional liability insurers have signaled rate increases through 2026. More limit is demanded, each dollar of limit costs more, and each dollar is more likely to be eaten by defense before it ever covers a loss.
The questions that actually matter at renewal
This is why reading an A&E program by its headline limit is a mistake. The questions that determine whether a firm is actually covered are structural. How large is the limit relative to the firm's largest project exposures and the limits its contracts require? A $1 million limit on a firm signing contracts that demand $5 million is not a program; it is a contractual breach waiting to surface.
What is the deductible, and does it also erode under defense costs? Many A&E policies apply the deductible to defense as well as indemnity, so the firm funds the first dollars of its own defense. And is there a separate claims-expense or supplementary defense option available? Some markets offer an endorsement providing a defense allowance outside the limit, or a first-dollar defense feature. These cost premium, but on a firm whose limit is close to its real exposure, they are the difference between a limit that survives the defense and one that does not.
Limit adequacy is a moving target
The limit that was adequate three years ago may not be adequate now — not because the firm changed, but because the environment did. A firm that has grown into larger projects, signed contracts with higher insurance requirements, or taken on riskier project types — civil and infrastructure work, residential condominiums, geotechnical scope — has quietly outgrown a limit that once fit. Limit adequacy is not set once at formation. It is re-evaluated against the current book of work, the current contract requirements, and a claims environment where defense costs keep rising.
This is the discipline PFTN brings to every A&E program. Strategic Discovery maps the firm's real project exposures and the limits its contracts actually require. Risk Assessment models how defense-within-limits erosion changes the protection a given limit provides against the firm's worst realistic claim. Solution Design structures the limit, the tower, the deductible treatment, and any defense-outside-limits options as one coherent program rather than a single number bought on price. Ongoing Optimization revisits that structure as the book of work and the market both move.
The number on the declarations page is where the conversation starts, not where it ends. The firm that understands how its limit erodes — and builds the program accordingly — is the firm whose coverage is still standing when the defense bill arrives.
— Ryan Mefford, President & Risk Advisor