Costco Car Batteries: Price, Warranty and Installation

Quick answer: In the US, Costco sells Interstate car batteries, in the warehouse only, with a 36-month prorated warranty on automotive batteries. Prices aren't listed online; recent examples run from about $124 to $180. Costco doesn't install batteries, so you swap it yourself or pay a shop. You also pay a refundable core fee that comes back when you return your old battery to Costco. In Canada, Costco sells Kirkland Signature batteries instead.

Key takeaways

• Brand: Interstate in the US (standard flooded and AGM); Kirkland Signature in Canada.
• Where: car, marine/RV, golf cart and lawn batteries are warehouse-only; small powersport batteries ship online.
• Warranty: 36 months, prorated. A failed battery gets you a partial refund, not a free replacement, and you need proof of purchase.
• Installation: not offered at Costco Tire Centers. Plan to install it yourself.
• Core fee: charged on every battery, refunded when you bring the old one back.

Which batteries does Costco sell?

In the US, every car battery at Costco is an Interstate battery; there's no Kirkland Signature car battery. Costco's battery page lists standard (flooded) and AGM automotive batteries, plus batteries "for boats, RVs, golf carts and lawn mowers." The exact selection depends on your warehouse.

Interstate's Costco site also lists powersport AGM batteries for motorcycles, ATVs and personal watercraft. Those are the only batteries Costco ships: they're sold "online only" and go out by UPS Ground. Car, marine/RV and golf cart batteries are not available online because of hazardous-materials shipping rules, so you buy them in the warehouse.

How much is a car battery at Costco?

Costco doesn't publish car battery prices online, and it doesn't quote battery prices or stock over the phone. You'll see the price in the warehouse. Here are the most recent prices reported by reputable outlets:

Prices vary by battery group size, type (AGM batteries cost more than standard flooded ones) and location. Jalopnik's March 2026 comparison put Costco's Interstate AGM at $179.99 against $189 for a Walmart EverStart Platinum AGM for the same car. Walmart installs it for you; Costco doesn't.

Price drops still count: Costco's 30-day price adjustment covers items whose price drops within 30 days of purchase, at Costco's discretion. Costco doesn't single batteries out, so keep the receipt and check the price if you see it lower in the warehouse within 30 days.

How the Costco battery warranty works

Costco's battery warranty (the current version is dated July 2023) is prorated:

• It covers defects in materials and workmanship, not a battery that has simply run down.
• Coverage lasts for the warranty period printed on the battery (36 months for automotive batteries) or for as long as the battery stays in the vehicle it was first installed in, whichever is shorter.
• If it fails, return it to any US or Puerto Rico Costco warehouse and you get back a pro-rata portion of the original purchase price and sales tax. The later in the warranty period, the less you get back.
• Proof of purchase is required for every claim.
• The warranty is void if the date code on the battery has been removed or destroyed.

Other battery types have their own periods, printed on the label. Powersport AGM batteries, for example, carry a 6-month prorated warranty.

Costco's general return policy treats batteries as an exception: tires and batteries "may be sold with a product-specific limited warranty." For a battery, the warranty above is your route back, not the open-ended satisfaction guarantee that covers most Costco items.

Does Costco install car batteries?

No. Costco Tire Centers list tire services only (rotation, balancing, nitrogen inflation and flat repair), and Interstate's own Costco FAQ answers "How do I replace a battery?" with do-it-yourself steps. Most cars take 15 to 30 minutes with basic hand tools. Otherwise, a mechanic or parts store can fit a battery you bought at Costco for a fee.

If you'd rather not do it yourself, factor that in. Walmart, AutoZone and Sam's Club include installation with many batteries, which can close the price gap.

What is the Costco battery core fee?

Costco says core fees for auto batteries are "a legal requirement and non-negotiable." The fee is added automatically when you buy a battery and refunded when you return your old battery. You pay it even if you have no old battery to return.

• Marine/RV and golf cart batteries: $15, refundable, charged on top of the price.
• Powersport batteries: $10, refunded when you bring the old battery to the Tire Center with your receipt or "Order Shipped" email.
• Car batteries: the amount varies by state and isn't published online. You'll see it on your receipt.

Bring the old battery back to Costco; that both recycles it and gets your core fee refunded. Interstate's Costco FAQ puts it simply: "Just return it to your local Costco."

How to find the right battery

1. Use "Find my Automotive Battery!", Interstate's lookup linked from Costco's battery page, with your year, make, model and engine.
2. Or check the Interstate application guide in the warehouse, or ask at the Tire Center.
3. Match the group size and terminal layout to your old battery, and buy AGM if your car came with AGM (common with start-stop engines).
4. Note the date code. Fresher batteries have more life in them, and the code has to stay readable for warranty claims.

Costco batteries in Canada

Costco Canada sells Kirkland Signature car batteries. Two examples on tires.costco.ca: a Group 51R and a Group 35, each $149.99 with a 36-month limited warranty and a $15 core fee, available in select warehouses only. Kirkland AGM batteries can also be ordered online and shipped to your home. Energizer AGM batteries are listed too, with a 100-month prorated warranty. Canadian claims are also prorated refunds at any warehouse, with proof of purchase.

FAQ

Is a Costco car battery worth it?

Often, if you're comfortable installing it. Interstate is a well-known brand and recent Costco prices undercut some competitors, but Costco doesn't install batteries and its warranty is prorated, while some stores include installation.

Can I return a Costco car battery?

Batteries come with a product-specific limited warranty instead of Costco's general return guarantee. If a battery fails because of a defect within its warranty period, return it to any US Costco warehouse with proof of purchase for a prorated refund.

Does Costco test car batteries?

Costco doesn't list battery testing as a Tire Center service. Interstate recommends having a battery tested twice a year or at each oil change; many parts stores do it free.

What brand are Costco car batteries?

Interstate in the US, Kirkland Signature in Canada.

Related: How the Costco price adjustment works · Costco return policy, item by item · Costco tires price adjustment

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Sources: Costco: automotive batteries · Costco battery warranty (PDF, 07-11-2023) · Costco: auto battery core fee · Costco return policy · Costco Tire Center FAQs · Interstate Batteries for Costco: FAQs · Jalopnik, March 2026 · Costco Canada batteries. Cover photo by Roger Starnes Sr on Unsplash.