Fiduciary Liability Insurance Cost: What Drives Plan Sponsor Premiums

Fiduciary liability insurance premiums are driven less by plan size than by how fees are structured and how the fiduciary process is documented. Following years of excessive-fee litigation, insurers now treat fee levels and review processes as the top pricing factors — which means the 2026 DOL emphasis on documented process directly affects what plan sponsors pay.

Carriers price fiduciary liability on the factors most predictive of an ERISA claim. Most are within the plan sponsor’s control, which is where a broker manages the cost.

• Fee levels and the documented process for reviewing them — the single largest driver.
• Plan assets and participant count, which set baseline severity.
• Investment menu composition, including any alternative or nontraditional options.
• Presence of employer stock as an investment option, which elevates exposure.
• Quality of the fiduciary process and committee documentation.

How the 2026 Rule Affects Your Premium

Because the DOL’s proposed safe harbor rewards documented process, the same documentation that protects you legally also supports better insurance terms.

• A disciplined, recorded review process is exactly what underwriters reward.
• Lower expected litigation severity can translate into more favorable pricing over time.
• Gaps in documentation signal risk to both courts and carriers.
• Coordinating coverage with a documented process is a cost-control strategy, not just a compliance one.
• Our advisors help build the process file that supports both protection and pricing.

What Fiduciary Liability Insurance Actually Costs by Plan Size

Most plan sponsors significantly overestimate what fiduciary coverage costs — particularly those running plans under $100M in assets. Premiums scale with plan complexity, not strictly on a dollar-per-asset basis, so a well-documented $75M plan often pays less than a loosely governed $30M plan with the same coverage limits. For context on what employees pay out of pocket, see our guides on MRI costs without insurance and chiropractor costs without insurance.

Based on current carrier pricing across Hotaling’s 401(k) book, here are the ranges plan sponsors are seeing in 2026 for $1M/$2M fiduciary liability limits with a $25,000 retention:

These ranges assume no prior fiduciary claims and standard investment menus. Plans with employer stock in the lineup, recent M&A activity, or a history of DOL audits typically sit at the upper end or require manuscript pricing.

What Triggers a Fiduciary Claim — and What Defense Costs

Understanding claim triggers helps plan sponsors see where carrier risk appetite actually lands. Excessive-fee lawsuits have dominated fiduciary litigation since the Tibble v. Edison decision in 2015, but the claim landscape has expanded. Underwriters now evaluate three categories when setting premiums.

Fee-related claims remain the largest driver of fiduciary exposure. A mid-market plan sponsor facing an excessive-fee complaint can expect defense costs between $250,000 and $750,000 through dispositive motions alone — and settlements in the $2M–$8M range for plans with $50M–$200M in assets. Those figures explain why carriers treat fee documentation as the single most important underwriting variable.

Investment performance claims surface when a plan’s selected funds consistently underperform relevant benchmarks and the sponsor cannot produce meeting minutes showing they evaluated and deliberately retained those options. The DOL’s 2026 rule makes this category more actionable by defining what “documented process” means — which ironically gives plaintiffs a clearer checklist to measure against.

Operational failures — late contributions, incorrect vesting calculations, failure to follow plan documents — generate smaller individual exposures but occur far more frequently. Carriers treat a pattern of operational errors as a signal of governance weakness, which affects pricing across all three claim categories.

How Plan Sponsors Can Reduce Their Fiduciary Premium

The most effective premium-reduction strategies are the same practices that reduce actual fiduciary risk. That alignment is why brokers who understand the underwriting side can simultaneously improve your governance and your pricing.

• Annual fee benchmarking with a third-party report — carriers give the most credit for fee reviews conducted by an independent party with published methodology. Internal reviews carry less weight. The report itself costs $3,000–$8,000 for a mid-market plan, but the premium reduction typically exceeds the cost within the first renewal cycle.
• Documented committee meetings with formal minutes — quarterly meetings with signed minutes that record which funds were reviewed, what data was considered, and what decisions were made. Our advisors help clients build a meeting template that produces exactly the documentation underwriters reward.
• ERISA Section 404(c) compliance — if the plan meets 404(c) requirements, participants bear responsibility for their own investment selections among the menu. Carriers discount premiums for verified 404(c) plans because the sponsor’s exposure narrows to menu construction rather than individual outcomes.
• Removing employer stock from the investment menu — the single largest premium reduction available to any plan that currently offers company stock. Employer stock creates concentrated-position risk that no amount of documentation eliminates.
• Using an independent fiduciary for investment selection — shifting investment selection to a 3(38) fiduciary transfers the liability itself, which can reduce the sponsor’s premium by 25–40%. The cost of the 3(38) service is often offset by the insurance savings plus reduced internal governance burden.

This is part of our complete guide to 401(k) fiduciary liability for plan sponsors.