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Costco vs Plymouth Rock: which is better for car insurance in 2026?

Q: Is Costco or Plymouth Rock cheaper?

We cannot answer that with published data. Costco does not release public rate information, so no independent study — ours included — can put a national average next to Plymouth Rock's $2,156/yr. The only way to know is to quote both.

Q: Which handles claims better, Costco or Plymouth Rock?

Neither has a clear edge. Costco scores Not rated and Plymouth Rock Not rated on the claims measure we use — close enough that the individual adjuster you draw matters more than the company average.

Q: Is Costco better than Plymouth Rock overall?

We can't put two scores side by side here. Costco does not publish enough of the underlying data for us to give it an overall score — we would rather say so than compute one from the two or three figures that do exist. Plymouth Rock scores 4.2 out of 5. Compare them on the individual categories above, and on the quotes you actually get.

Q: Can I switch from Costco to Plymouth Rock mid-policy?

Yes. Auto policies can be cancelled at any time, and most insurers refund the unused premium pro-rata — though some charge a short-rate cancellation fee, so check your policy before you cancel. The one rule worth following: get the new policy bound and in force before you cancel the old one. Even a single day uninsured can count as a coverage lapse, which raises your rate at the next renewal and, in some states, exposes you to a registration penalty.

CostcoNot scored

Plymouth Rock

Across our six scoring categories, Costco comes out ahead in 1, Plymouth Rock in 2, with 3 too close to call. There is no overall score to compare, though: Costco does not publish enough of the underlying data to earn one, and we would rather leave it blank than build a number out of the two or three figures that happen to exist. Plymouth Rock is the better-documented of the two, which is not the same as being the better insurer for you. Judge these two on the categories where both have real figures — and on what they actually quote you.

Costco vs Plymouth Rock, side by side

Category

CostcoRead the full review

Plymouth RockRead the full review

Overall scoreWeighted across the six categories below

Not scored

PriceAverage annual full-coverage premium · 25% of score

Not published

This company does not release public rate data

3.5$2,156/yr

Average full coverage vs. $2,356 national average

Claims satisfactionJ.D. Power 2025 claims study, out of 1,000 · 20% of score

Not rated

Not ranked as its own brand in the J.D. Power 2025 claims study

Not rated

Below the sampling frame of the J.D. Power claims study, which covers only the largest insurers

Complaint recordComplaints relative to company size · 15% of score

2.5More than expected

Complaints relative to company size, NAIC data 2022–2024

5.0Far fewer than expected

Complaints relative to company size, NAIC data 2022–2024

Better

Financial strengthAM Best Financial Strength Rating · 10% of score

4.0A

AM Best Financial Strength Rating

Better

3.5A-

AM Best Financial Strength Rating

DiscountsBreadth of published discounts · 15% of score

3.59 published

Discounts on the carrier's own pages · No branded telematics program found

4.010 published

Discounts on the carrier's own pages · Telematics: YUBI

Better

Digital experienceApp ratings and self-service depth · 15% of score

Not published

No app-store presence we could verify

5.04.86 iOS / 4.7 Android

App Store (8.0K ratings) and Google Play (1.7K ratings), August 2026

Availability

40 states, members only

6 states in the Northeast

Best suited to

Costco Executive Members who value guaranteed renewal

Northeast drivers who want a strong app and low complaint volume

Sources: average premiums from NerdWallet's August 2026 rate analysis (Quadrant Information Services), for a 35-year-old driver with a clean record and good credit in a 2023 Toyota Camry LE at 12,000 miles a year, 100/300/50 limits with $1,000 deductibles — national average $2,356. Claims satisfaction from the J.D. Power 2025 U.S. Auto Claims Satisfaction Study (segment average 700). Complaint record from NerdWallet's analysis of NAIC complaint data, 2022–2024. Financial strength from AM Best. Discounts and app data from each carrier's published pages and the Apple App Store / Google Play, retrieved August 2026. Updated August 2026.

Costco vs Plymouth Rock across all six categoriesScored 1–5. Longer is better in every category — the price bar already accounts for cheaper being better.

CostcoPlymouth Rock

Category by category

Price

Too close to call

Costco does not release public rate data, so there is no like-for-like premium to set against Plymouth Rock's $2,156/yr. That is a real gap in the comparison, not a rounding error — treat Costco's price as unknown until you have a quote in hand.

Costco

No published premium. The rate study behind every other price on this site does not quote Costco separately, so the price category carries no score.

Plymouth Rock

$2,156 a year for full coverage, 8% below the national average — mid-pack, and not the reason to pick it.

Claims satisfaction

Too close to call

Neither pulls ahead on claims satisfaction: Costco posts Not rated and Plymouth Rock Not rated, a difference too small to choose on.

Costco

Costco is not a ranked brand in the J.D. Power 2025 claims study. American Family's 702 is measured on a different book of business and is not borrowed here.

Plymouth Rock

Not in the J.D. Power claims study, which covers only the largest insurers.

Complaint record

Plymouth Rock ahead

Plymouth Rock takes complaint record on Far fewer than expected against Costco's More than expected.

Costco

More complaints than expected for its size, per NerdWallet's analysis of 2022–2024 NAIC data — a worse record than American Family's own brand.

Plymouth Rock

Far fewer complaints than expected for its size — the strongest complaint band we assign, shared with only a handful of carriers here.

Financial strength

Costco ahead

Costco takes financial strength on A against Plymouth Rock's A-.

Costco

AM Best A (Excellent), affirmed in September 2025 for all three companies that underwrite Costco auto policies.

Plymouth Rock

AM Best A- (Excellent), with the outlook revised to positive in March 2026 — the only carrier in this review currently trending upward.

Discounts

Plymouth Rock ahead

Plymouth Rock takes discounts on 10 published against Costco's 9 published.

Costco

Nine published auto discounts, counting the member discount itself. No usage-based program is offered through Costco.

Plymouth Rock

Around ten published discounts, plus two distinct programs: YUBI for telematics and a separate Road Rewards points scheme.

Digital experience

Too close to call

Neither pulls ahead on digital experience: Costco posts Not published and Plymouth Rock 4.86 iOS / 4.7 Android, a difference too small to choose on.

Costco

No app-store figures we could attribute to the program. Policies are serviced through American Family's account system, and we could not confirm which app Costco policyholders use.

Plymouth Rock

4.86 on the App Store and 4.7 on Google Play — the highest combined app ratings of any carrier in this review, by a clear margin.

So which one?

Pick Costco if…

You are among costco executive members who value guaranteed renewal.
Financial strength is a priority; Costco holds A from AM Best.
Availability fits: 40 states, members only.

Read the full Costco review →

Pick Plymouth Rock if…

You are among northeast drivers who want a strong app and low complaint volume.
You want the lower complaint record — Plymouth Rock sits at Far fewer than expected.
You expect to stack discounts — Plymouth Rock's lineup is the broader of the two.
Availability fits: 6 states in the Northeast.

Read the full Plymouth Rock review →

Costco vs Plymouth Rock, answered

The questions people ask before switching between these two.

Is Costco or Plymouth Rock cheaper?

Which handles claims better, Costco or Plymouth Rock?

Is Costco better than Plymouth Rock overall?

Can I switch from Costco to Plymouth Rock mid-policy?

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