A second opinion on your reserves is the single highest-leverage piece of work a self-insured entity can commission outside of the annual review itself. It costs 40 to 75 percent of a full review and, when scoped right, gives the risk manager or CFO an independent read on whether the number being booked to the balance sheet is the number the underlying data supports.
And yet most self-insured entities never commission one. The usual reason is a mix of inertia, politics, and the worry that requesting a second opinion signals distrust of the incumbent actuary. None of these reasons survive contact with a board asking whether the reserve number is right.
This article covers when a second opinion is worth the fee, how to scope it, and how to run it cleanly.
What a second opinion actually is
A second opinion is an independent actuarial review of the same program, using the same underlying data (or a reconstruction of it), reaching its own conclusions on unpaid losses, range, and method selection. It is not:
- A peer review of the primary actuary’s report. That is cheaper, faster, and has its place, but it is a different product. A peer review checks whether the primary actuary’s methods are reasonable and documented. A second opinion reaches its own answer.
- A dispute. A second opinion is a diagnostic tool. The result is usually that two actuaries produce reasonably close numbers through different paths, which is confirming. Sometimes the result is material divergence, which is a conversation, not a conflict.
- An audit. External auditors perform a different function under different standards.
The right comparison is to a second medical opinion. You get one when the stakes are high and the recommendation is consequential, not because you distrust the first doctor.
Five triggers for a second opinion
These are the five situations where a second opinion is almost always worth the fee. If any of them applies to your program, the cost-benefit analysis strongly favors commissioning one.
1. Adverse development surprise
Your prior actuary’s estimate for the year that just closed was materially lower than what you actually paid plus reserves at year-end. The estimate “strengthened” materially, either in the most recent annual review or when you closed the books and saw where losses landed relative to the prior-year estimate.
Adverse development happens. Good actuaries get it wrong sometimes because the data was telling one story and the reality turned out to be another. But persistent or large adverse development is a signal that something structural is being missed: a case strengthening that was not caught, a payment pattern shift, a mix change, or a method that is no longer appropriate for the current state of the program.
A second opinion after material adverse development tells you whether the primary actuary’s current estimate is now sufficient or whether the same blind spot is still in the number.
2. Management change
A new CFO, a new risk manager, a new treasurer, a new claims director, or a new audit committee chair. The incoming executive inherits a reserve number they did not set, based on a methodology they did not evaluate, produced by an actuary they did not hire.
A second opinion in the first year of a new executive’s tenure is inexpensive cover. It either confirms the inherited number, in which case the executive owns it with a clean conscience, or it surfaces a disagreement while there is still time to act. Either outcome beats the alternative of booking a number the new executive has no independent view of.
This is also true when the actuary changes. If a new signing actuary takes over the primary engagement, a second opinion from a fully independent firm during the transition year is a useful sanity check.
3. Material transaction
An M&A deal, a captive restructuring, a retention change, a significant reinsurance change, or any event where the reserve number will be used outside its normal audience. Transactions produce scrutiny. Scrutiny produces questions. A second opinion answers them before they are asked.
In an acquisition, the buyer’s diligence team will almost certainly commission an actuarial review. Having a recent independent view of your own reserves, on your schedule and at your cost, puts you in a stronger negotiating position than learning what the buyer’s actuary thinks for the first time at the term-sheet stage.
4. Regulatory or auditor pressure
Your state captive regulator flagged the reserve as an area for review. Your auditor has questioned the adequacy of the estimate. A rating agency has raised reserve adequacy as a concern. Your self-insurance regulator has asked about collateral.
These are not academic. A second opinion gives you an independent expert view you can put in front of the regulator or auditor. That is often more persuasive than explaining why your primary actuary’s number is right.
5. Multi-year trend of missed estimates
This is the quietest trigger and the most important. Look at the last five years of annual reserve estimates versus what actually developed. If the primary actuary’s estimate has been consistently too low (adverse), consistently too high (favorable releases that look good until you realize the initial estimates were padded), or consistently off by large amounts in either direction relative to the size of the program, the methodology has a structural issue that is not going to self-correct.
A second opinion in this case is less about any single year’s number and more about pressure-testing the methodology that keeps producing misses.
How to scope a second opinion
A second opinion can be scoped in three levels, at roughly 40, 60, and 100 percent of a full review fee.
Light: peer review of the primary report
The second actuary reviews the primary actuary’s report, evaluates the methods and diagnostics, and offers an opinion on reasonableness. No independent analysis. This is the cheapest option, roughly 15 to 25 percent of a full review fee, and the least informative. It tells you whether the primary actuary’s work is defensible, not whether their number is right.
Useful when: you are confident in the primary actuary but want a documented peer review for audit or governance reasons.
Medium: independent analysis on selected segments
The second actuary independently analyzes the segments that matter most, usually the largest lines or the lines where recent experience has been volatile, and benchmarks the results against the primary actuary’s. Full data package, full method selection, full diagnostics, but only on the segments in scope.
Roughly 40 to 60 percent of a full review fee. Useful when: you want a real second opinion but are cost-constrained, or when most of the program is stable and you only need scrutiny on a subset.
Full: parallel independent analysis
The second actuary performs a complete independent review using the same data, reaches their own conclusions across all lines, and produces their own report and range. This is the gold standard. Roughly 75 to 100 percent of a full review fee.
Useful when: triggers 1, 2, 3, or 5 apply and the stakes merit full scope.
How to run a second opinion without blowing up your primary
The single biggest barrier to commissioning a second opinion is the worry that the primary actuary will take it personally. Here is how to handle that.
Tell the primary actuary up front. Not after the fact, not through the grapevine. The primary actuary learns that a second opinion is being commissioned, from you, before the second firm is engaged. Frame it as a governance decision (board request, new CFO, auditor pressure, transaction diligence), which it almost always is.
Give them the scope. The primary actuary should know what the second firm will be looking at and what kind of deliverable is expected. They should not feel ambushed.
Give the second firm the same data package. The primary actuary’s triangles, exposures, large loss schedule, and reinsurance summary. The second firm will independently reconstruct the analysis, but starting from the same data eliminates the “you gave them different inputs” critique of any divergence in results.
Share the primary actuary’s most recent report with the second firm. Two arguments against this exist: one, that it biases the second actuary toward the primary’s answer; two, that it is the cleanest possible independent engagement to withhold it.
In practice, professional second actuaries read the primary report and still reach independent conclusions, and withholding it forces the second firm to spend fee reconstructing work already done. Share it.
Set expectations on the report. The second firm’s deliverable should state its own conclusions and, if relevant, identify areas of agreement and disagreement with the primary. It should not editorialize on the primary actuary’s competence.
What to do with the result
A second opinion will produce one of three outcomes.
Convergence
The second firm’s estimate is within 5 to 10 percent of the primary firm’s estimate, with similar method selections and similar range. This is the most common outcome when the primary actuary is doing good work. Result: you book the primary actuary’s number with full confidence, you document the second opinion in your governance file, and the story ends there.
Moderate divergence
The estimates differ by 10 to 25 percent, or the range constructions differ materially. This is a conversation. The primary actuary should be walked through the second firm’s conclusions and given the chance to respond. Often the divergence comes from different judgment on a specific accident year or a specific method selection, and the conversation surfaces something useful. You may end up with a blended conclusion, an adjusted primary number, or a note in the file that both estimates are reasonable within the range.
Material divergence
The estimates differ by more than 25 percent, or one firm sees a structural issue the other does not. This is not common, and when it happens it is rarely random. Something is being missed by one of the two, and the conversation needs to identify which.
Your obligation in this case is to your board and your auditor. You cannot book a number you do not believe in. If the primary actuary’s reasoning persuades you, book their number and document why. If the second firm’s reasoning persuades you, book a higher or lower number and document why. If neither position is fully persuasive, commission more work; do not book a number you are unsure of.
Cost versus cost
The fee for a second opinion is typically $15,000 to $100,000 depending on scope. That is material. It is also a small fraction of the cost of booking a materially wrong reserve and having to correct it the next year in front of the board, the auditor, and the captive regulator.
For most self-insured entities with meaningful unpaid losses, commissioning a second opinion every three to five years is cheap governance. Commissioning one in the year a trigger applies is closer to required governance.
Related reading
- How to Evaluate an Actuary’s Report: the framework for judging the primary report before you commission a second opinion.
- What Could Be Wrong With Your Reserves: A Self-Insured’s Guide to Diagnostic Review: the self-assessment that often precedes a decision to commission a second opinion.
- What a Reserve Review Should Cost: fee context for the second-opinion scoping decision.
Looking for an independent firm to commission a second opinion? The hire an actuary directory is in development. Join the waitlist there.