The 2016–2017 window shows the two channel stories continuing on their established tracks: a deepening commercial moat near 84% and a steady personal-lines ceding to direct response. The full arc is the channel-share trends tactical; this is the two-year reading.
§ 01 · Personal linesDirect response past 18%.
The independent-agency channel held its personal-lines share near 35% across both years, while direct response advanced from 17.2% (2016) to 18.3% (2017) and captive carriers eroded from 47.7% to 46.6%. The substitution clock kept ticking at its familiar point-a-year pace.
| Personal lines | 2016 | 2017 |
|---|---|---|
| IA channel combined | 35.21% | 35.0% |
| Captive / exclusive | 47.65% | 46.6% |
| Direct response | 17.15% | 18.3% |
§ 02 · Commercial lines & autoThe moat near 84%.
Independent-agency commercial share climbed to 83.6% by 2017, captive dipping below 16%, direct response below 1%. In private passenger auto — direct response's stronghold — direct writers reached 23.3% by 2017, continuing to take share from captive carriers.
| Channel | Commercial 2016 | Commercial 2017 | PPA 2017 |
|---|---|---|---|
| IA channel combined | 83.16% | 83.64% | ~30.6% |
| Captive / exclusive | 16.22% | 15.71% | 46.1% |
| Direct response | 0.62% | 0.65% | 23.3% |
§ 03 · The signalTwo tracks, no convergence.
By 2016–2017 the pattern is fully entrenched and shows no sign of converging: commercial lines deepening toward the channel, personal auto ceding toward direct writers. The independent channel's aggregate personal-lines stability continues to mask the internal national-to-regional reshuffle and the steady auto erosion underneath.
- Direct response past 18% of personal lines. 17.2% (2016) → 18.3% (2017).
- IA commercial near 84%. 83.6% by 2017 — the moat deepening.
- Direct-response personal auto past 23%. 23.3% in 2017.
- Captive eroding on both fronts. Personal lines to 46.6%, commercial below 16%.
- IA personal-lines share stable. Held near 35% across both years.
The benchmark is the baseline, not the price.
Channel share doesn't value an agency — it frames the structural weather a book competes in. The 2016–2017 read reinforces the durable thesis a buyer underwrites: commercial-led books sit in a near-84% channel that keeps gaining, while personal-auto-heavy books face a direct-response competitor now writing nearly a quarter of the line. Line mix is the structural quality signal; the long-run pattern is channel-share trends.
What this measures. Direct written premium by distribution channel, classified by IIABA from A.M. Best data; the report's 5-year personal-lines view groups national and regional IA into a single "total agency writers" figure.
Channel definition. A.M. Best has no native "direct response" category; IIABA assigns carriers to channels, so some affiliate premium is approximate.
Restatement. A.M. Best applies retrospective adjustments, so a given year's figures can differ slightly across editions.
Frequency. The report publishes annually. Milly Books refreshes this brief with each new edition.