Scope sheet
finbryn.com
Actuarial
Self-funded health plan IBNR and COBRA rate support
Finbryn provides IBNR and COBRA rate support for self-funded health plan sponsors, building a claims lag triangle from de-identified paid-claims data and a completion-factor IBNR estimate, for review and signature by a credentialed signing actuary. COBRA charges cap at 102% of the applicable premium, 150% in a disability extension (eCFR, checked 2026-10-02).
What is included
- Claims lag triangle built from de-identified paid-claims data
- IBNR estimate with the method, factors and margin written out
- Premium-equivalent and COBRA applicable premium workpapers for the plan year
- Budget projection by coverage tier
- A memo your auditor can tie to the general ledger accrual
The process
- 1.
Agree scope and the signing actuary
Plans covered, valuation date, accrual deadline and the signing actuary named in the engagement letter.
- 2.
Receive a de-identified lag file
Paid claims by incurral month and paid month, with no names, member IDs or diagnosis codes. We reject files that carry personal identifiers.
- 3.
Reconcile to paid totals
Tie the file to the paid-claims reports and the general ledger, and log exceptions for the plan administrator.
- 4.
Build the triangle and factors
Cumulative paid by lag, age-to-age factors, completion factors and a view with large claims removed.
- 5.
Project IBNR and rates
Ultimate claims by month, IBNR with and without a margin, premium-equivalent rates by tier, and the COBRA applicable premium workpaper.
- 6.
Signing actuary reviews and signs
The credentialed actuary reviews the method, assumptions and results and signs whatever opinion or rate determination is required.
- 7.
Auditor tie-out
Your auditor receives the memo and workpapers and ties the estimate to the ledger accrual.
Software
Microsoft Excel, Python, R
Finbryn is a brand of Northlane Solutions Inc., a Delaware corporation.
Reviewed October 2026