What is the difference between premium retention and client retention?

What does each number actually measure?

Start with last year's book: the clients and policies in force a year ago. Client retention divides the clients who still hold at least one policy by the clients at the start. A household paying $900 and a manufacturer paying $90,000 each count once.

Premium retention starts with last year's premium. Take away the premium of clients who left and of policies that staying clients dropped. Add the rate and exposure change on the policies that renewed, and the price change on rewritten policies. The result is Renewal business, the Best Practices Study's term. Divide it by last year's premium.

Commission retention is the same calculation in annual agency commission.

Why does premium retention include price changes?

Because the question it answers is how much of last year's book is still producing revenue, at what it is worth today. That is the convention the Best Practices Study uses, and Keelridge follows it so an agency can compare its figure with the study's.

It has a consequence worth knowing: premium retention can pass 100%. If prices rose by more than the agency lost, last year's book renewed for more than it was worth a year ago.

Two agencies can both say “premium retention” and mean different things. Some freeze each client at last year's premium and leave price changes out. Some divide this year's whole book by last year's, new business included. Before comparing a percentage with another report, ask which convention it uses.

Why do client and premium retention disagree?

For two reasons. The first is who left. If the clients who left were larger than average, more premium left than their share of clients, and premium retention falls below client retention. If they were smaller, the reverse.

The second is price. Rising renewal prices lift premium retention but never change the client count.

To separate the two, look at the premium retained before price changes: last year's premium less what left with lost clients and dropped policies. Set beside client retention, it shows whether the departures were large or small. The step from retained premium to Renewal business is rate and exposure.

Take the fictional demo agency, for the twelve months to September 30, 2026. It retained 92% of last year's clients. The opening book was $6.28M; $612k left with lost clients and $65k in dropped lines, so retained premium is $5.60M, or 89%. That is lower than client retention, so the clients who left were larger than average. Rate and exposure then added $222k and rewrites $2k. Renewal business is $5.83M, so premium retention is 92.8%.

How are rewrites and carrier moves counted?

As retained. A policy rewritten to the same coverage under a new line code within 45 days, or the same line of business moved to another carrier, stays in the book at its old premium. Only the difference between the new and the old premium counts, as a rewrite. A carrier move often lowers the premium, so rewrites can be negative.

Without that rule, a carrier move looks like one policy lost and one gained: retention understates what the agency retained, and new business overstates what it won.

A change of coverage is different. A client who drops a homeowners policy and buys an auto policy has dropped a line and bought a new one, although the client stays.

So which number should an owner use?

Use both, and keep commission retention beside them when the owner needs the recurring-revenue lens.

Use client retention to see the share of relationships retained. Use premium retention to see how much of last year's premium renewed, and retained premium beside it to see what left before prices moved. Losing ten small accounts and losing one large one are different book events even when the client count is the same.

Use commission retention for the same bridge in annual commission. Premium and commission can diverge when commission rates differ across the accounts that stayed and left.

Read the lost figure separately: premium that left with lost clients and dropped lines, in dollars. It is not a rate, and it does not net against price increases.

Why do two systems report different retention for the same period?

Almost always because they are not measuring the same thing, and the definition is buried.

• Price changes. Is the premium valued at last year's price or this year's? The study's renewal business uses this year's.
• The denominator. Is it everything in force at the start of the period, or only what 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 client is gone.
• Rewrites and carrier moves. Moving a client to a different carrier can register as one policy lost and one gained, which understates retention while the client 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 stated snapshot period, with the definition attached, and the book movement behind them: what was lost, what was dropped, what rate and exposure changed, and what arrived.

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 four questions: whether it counts clients or dollars, whether the dollars are at last year's price or this year's, what the denominator is, and how rewrites and carrier moves are treated. If the report cannot answer all four, do not compare its percentage with another system's yet.

Sources used for the industry context

• IndependentAgent.com, Activity Reporting: Measuring the Heartbeat of the AgencyIndustry discussion of client, premium, and commission retention as distinct measurements rather than one interchangeable rate.
• Goosehead Insurance: 2025 Form 10-KA public-company example that defines client retention explicitly and reports a premium-basis measure separately, illustrating why the basis must be stated before comparing rates.