What Solvency II actually rewards in a reinsurance programme

Ask a finance director what their reinsurance programme is for and you will usually get one of two answers: it protects the result, or it protects the capital position. Both are true, but they pull in different directions, and Solvency II is unambiguous about which one it pays for.

The standard formula computes the solvency capital requirement as a one-in-two-hundred-year loss over a one-year horizon. Reinsurance reduces that requirement only to the extent that it responds at that point in the distribution. A cover that reliably trims two points off a normal loss ratio is valuable for earnings stability and worth close to nothing in the SCR calculation. A cover that does nothing in nine years out of ten and then absorbs a catastrophe event is the reverse.

Where the relief actually comes from

Three mechanisms account for most of the capital benefit we see in practice, and they are worth separating because they behave differently under stress.

• Direct reduction of the net catastrophe scenario. The catastrophe sub-module runs gross and net; a well-placed excess of loss tower is the most direct lever available on non-life SCR.
• Reduction of premium and reserve risk volume measures. Proportional cover lowers the net written premium and net best-estimate reserves that drive the premium and reserve risk charge — a linear, predictable effect.
• Diversification. Because the sub-modules are aggregated with a correlation matrix, relief in one line is diluted by the others. Cover that removes the dominant contributor to the aggregate gets a much better exchange rate than cover on a line already well-diversified inside the portfolio.

That third point is the one most often missed. Two structures with the same ceded premium and the same expected recovery can differ materially in capital relief purely because of where they sit relative to the rest of the book. This is why we model the SCR impact of a candidate structure rather than reasoning about it line by line.

The counter-effects nobody quotes

Ceded reinsurance creates a reinsurance recoverable, and recoverables attract a counterparty default charge. The charge scales with the size of the recoverable and the rating of the security behind it, and it is applied after the risk-mitigating benefit. A programme placed with a cheap, thinly rated panel can give back a meaningful slice of the relief it just bought — before anyone has considered whether that panel will actually pay a disputed claim in year three.

Collateral, funds withheld and loss-sensitive features change the arithmetic further. So does the risk-mitigation recognition test: cover must be effective, legally certain and in force at the valuation date. A structure that only responds on an aggregate basis over multiple years, or that carries a broad cancellation clause, may not qualify for the recognition the buyer assumed when they priced it.

A more useful metric than rate on line

Rate on line answers the question “what does this layer cost?” It does not answer “what does this layer do?” The metric we put in front of clients is the ceded cost per unit of SCR released, computed on the whole programme rather than layer by layer, alongside the effect on expected result and on result volatility.

Ranking candidate structures that way tends to reorder them. Working layers that look expensive on rate on line frequently justify themselves on earnings volatility while contributing little capital relief; upper layers that look like insurance against the improbable often turn out to be the efficient part of the tower. Neither conclusion is universal — it depends on the portfolio — which is exactly the point. The same argument applies to the inputs behind those rankings: see our note on the questions worth asking of a catastrophe model.

What this means at renewal

Bring the capital model into the placement conversation early, not as a post-hoc justification. In practice that means agreeing the measurement basis before going to market, testing three or four structurally different options rather than variations on last year’s terms, and pricing security quality explicitly rather than treating it as a tiebreaker.

None of this makes the cheapest quote irrelevant. It makes it one input among several — and usually not the one that decides whether the programme was worth buying.

If you are preparing a renewal and want the capital impact modelled before you go to market, talk to our technical team.