Book of business · Notes
What is the difference between premium retention and client retention?
Premium retention measures how many dollars renewed. Client retention measures how many customers stayed. Because premium retention moves with rate as well as with behaviour, a hard market can lift it while an agency is quietly losing accounts. Reported alone, either number can describe an agency that is not actually there.
What does each number actually measure?
Premium retention compares the premium that renewed against the premium that was up for renewal. It is a dollar measure, and it moves for two independent reasons: whether business stayed, and what it was priced at.
Client retention compares the customers who stayed against the customers who could have stayed. It is a headcount measure and it ignores size entirely — a household paying $900 and a manufacturer paying $90,000 each count once.
Policy retention is a third measure, and it is the one most often confused with the other two. An account can stay while shedding a policy, which reduces policy retention without losing the client.
How can premium retention rise while the agency loses customers?
This is the failure mode worth understanding, because it is the one that flatters an agency in exactly the years it should be worried.
Suppose renewal premiums rise sharply across the book. Accounts that stay renew at higher premiums, so the retained dollars grow. If a number of smaller accounts leave, their departure removes comparatively little premium. The dollar ratio can improve while the customer count falls.
The agency reports a strong retention number and a shrinking client base in the same period. Both are accurate. Only one of them gets into the management report.
So which number should an owner use?
Both, and for different questions.
Use client retention to judge service and relationship health. It is the closest thing to asking whether people want to keep working with the agency, and it is not distorted by pricing.
Use premium retention to judge revenue durability, because commission follows premium rather than headcount. Losing ten small accounts and losing one large one are very different financial events and only the dollar measure sees the difference.
Read them together and the gap between them becomes the interesting figure. A widening gap usually means the book is being held up by rate rather than by loyalty.
Why do two systems report different retention for the same period?
Almost always because they are not measuring the same population, and the definition is buried.
- The denominator. Is it everything in force at the start of the period, or only what actually reached its renewal date within it? These produce materially different answers.
- Cancellations versus non-renewals. A mid-term cancellation may be excluded from a renewal-based measure entirely, even though the customer is gone.
- Rewrites and remarkets. Moving a client to a different carrier can register as one policy lost and one gained, which understates retention while the customer never went anywhere.
- Line-level versus account-level. Counting each coverage line separately makes a multi-policy household look like several retention events instead of one relationship.
What should a monthly review show?
Both measures, from a named snapshot period, with the definition attached — and ideally the movement behind them: what was retained, what was lost, what was gained, and what merely transferred between producers.
A single blended retention percentage with no definition is the least useful number in agency reporting. It cannot be challenged, it cannot be compared to a benchmark honestly, and it hides the one trend an owner most needs to see.
What this looks like in practice
Why one number a year is not enough
What to do with this in your own review
Find your current retention number and ask two questions about it: is it counting dollars or customers, and what is in the denominator. If nobody can answer both quickly, the number is not yet telling you anything you can act on.