Category: Claims handling · Reviewed by Mark Fox, Broker · Renewals · Last reviewed 2026-06-11
The net retained line is the share of an underwriting risk that an insurer retains for its own account after all reinsurance — the true exposure to which the insurer is committed and on which its underwriting result depends.
The net retained line is the residual exposure after the cedant has ceded to its reinsurance programme. For a $20m risk written by a cedant with $15m of reinsurance, the net retained line is $5m. The cedant’s exposure to claims is capped at $5m (plus any reinstatement obligations); the reinsurers carry the rest.
For claims handling, the net retained line is the operational measure of the cedant’s true exposure. Net loss is the figure that drives underwriting performance metrics, combined ratio analysis and capital adequacy assessment.
The framework includes:
For Solvency II, net technical provisions are the principal measure of the cedant’s claims liability after reinsurance. The PRA’s prudential framework operates on the net basis subject to credit-quality adjustments for reinsurance recoverable.
The net retained line concept applies at multiple levels:
At the underlying policy level, the net retained line is the cedant’s share of the gross risk after reinsurance.
At the portfolio level, the aggregate net retained position is the total net exposure across all policies. This drives capital and reserving.
At the line-of-business level, the net retained position determines the line’s profitability and underwriting discipline.
At the entity level, the aggregate net retained position determines the firm’s overall capital requirement under Solvency II.
For claims handling, the net retained line is calculated for each claim:
For Solvency II reporting, the cedant presents both gross and net positions. Reinsurance recoverables are subject to credit-quality adjustment for non-performance risk.
The trend over recent years has been toward higher retentions across most lines (driven by hardening reinsurance markets and improved cedant capital). UK insurers have generally increased their net retained exposure across multiple classes.
For the reinsurer, the inverse position applies. The reinsurer’s net retained exposure is its gross exposure minus its retrocession. The chain of reinsurance can run through multiple layers before settling.
“Per policy net retained line” — the cedant’s retention on each underlying policy.
“Per event net retained line” — the cedant’s retention on a single event, often the catastrophe retention.
“Annual aggregate net retained line” — the cedant’s maximum retained loss across all claims in a year (where aggregate covers apply).
“Catastrophe net retained line” — specifically for cat-related exposures.
“Specialty net retained line” — for specialty lines where retention is calibrated to risk appetite.
A casualty insurer’s book at year-end:
Reinsurance position:
Net position:
The 121% net combined ratio indicates an underwriting loss before investment income. The insurer’s reserving committee reviews the underlying causes and considers price adjustments and reinsurance programme changes for the following year.
For capital purposes, the net retained position drives the SCR calculation. The capital required is proportional to the net risk, with adjustments for diversification and reinsurance counterparty risk. The credit-quality adjustment for reinsurance recoverables (assuming high-rated reinsurers) is approximately £2m, reducing the recognised recoverable from £163m to £161m on the balance sheet.
By Matt Bartlett, Director, on 2026-06-11. Next review: 2026-12-11.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-11. Apex Insurance Brokers Limited, FCA FRN 724952, Companies House 07014570. Not regulated advice — consult your broker on your specific position.
Apex Insurance Brokers serves UK professional services firms and commercial businesses. Call 0117 325 0027, email hello@apexinsurancebrokers.co.uk, or request a quotation.
Get a quote