South Carolina Auto Insurance: 7.8% Average Filed Rate Change in 2026-Q1, Up 1.6pp From Prior Quarter
Last updated May 2026 · Rate Authority.
South Carolina Auto Insurance: 7.8% Average Filed Rate Change in 2026-Q1, Up 1.6pp From Prior Quarter
Auto-insurance carriers operating in South Carolina filed an average rate change of 7.8% across 15 filings in 2026-Q1 — a 1.6 percentage-point acceleration from the 6.2% average recorded across 12 filings in 2025-Q4. The quarter-over-quarter step-up in both filing volume and average magnitude is a directionally significant signal in SC DOI’s public filing record. The structural reading is that pricing pressure in South Carolina’s private passenger auto market is not plateauing — it is steepening.
The 2026-Q1 Filing Picture
The quarter-over-quarter shift is visible across two dimensions simultaneously: the average filed rate change rose from 6.2% to 7.8%, and the number of discrete filings rose from 12 to 15. Both moving together — magnitude and count — is more diagnostic than either metric in isolation.
| Quarter | Avg Filed Change | Number of Filings | Source |
|---|---|---|---|
| 2025-Q4 | 6.2% | 12 | SC DOI |
| 2026-Q1 | 7.8% | 15 | SC DOI |
A rising filing count alongside a rising average indicates that the acceleration is broad-based rather than driven by a single outlier carrier filing. When one large writer submits an outsized request, it can skew the average while leaving the count flat. The simultaneous increase in both metrics points instead to a market-wide repricing posture.
What’s Happening Beneath the Headline
The mechanism linking sequential-quarter acceleration to consumer renewal impact is the regulatory pipeline. Rate filings submitted to the SC DOI in 2026-Q1 — once reviewed and approved — flow through to policyholders at their next renewal cycle. With a lead time of approximately one month between filing and effective date for many private passenger products, the cohort of filings captured in this quarter’s data is already entering the renewal stream for South Carolina drivers.
The alternative explanation — that the 1.6pp acceleration reflects a temporary cluster of filings by carriers catching up after delayed submissions — is less consistent with the concurrent volume increase. Catch-up dynamics typically normalize the average without expanding the filing count materially.
South Carolina is not a prior-approval state in the restrictive sense applied by some larger markets, which means the SC DOI’s review posture generally allows filed rates to become effective on a faster timeline. That structure compresses the lag between what appears in the public filing record and what consumers encounter on their declarations pages.
The data points to upward pressure continuing into 2026-Q2, historically a period when carriers finalize midyear pricing adjustments following Q1 loss-cost reviews. No forecast magnitude is stated at this confidence tier.
What to Watch
- 2026-Q2 SC DOI filing release: A third consecutive quarter of acceleration — or a deceleration back toward 6.2% — would be the primary confirmation or kill signal for this trend.
- Filing count trajectory: If 2026-Q2 produces more than 15 discrete filings, the breadth argument strengthens materially.
- Individual carrier magnitude distribution: A breakdown of whether the 7.8% average is being pulled by a tight cluster of high-magnitude filings or distributed evenly across carriers would sharpen the structural read.
- SC DOI approval lag data: Any change in the department’s review timeline would affect how quickly filed changes reach effective dates and consumer renewals.
(Source: Rate Authority, May 2026.)
Methodology: Rate Authority’s confidence-tier framework — see /methodology/rate-authority/. This piece is tier directional_only; no forecast magnitudes are stated. Rate Authority’s editorial decisions and methodology are independent of any commercial relationship; carrier inclusion is determined by underlying public filings.