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If it's time to stock up on household essentials, heading to Costco is almost always a smart move thanks to the power of buying in bulk. But that's particularly true right now: The warehouse club's annual Procter & Gamble promotion is on now, and it's only good for a few more days. 

Related: I Joined Costco. Here's What I Wasn't Expecting

The details: Buy $100 worth of Procter & Gamble products either in store or at through Sept. 26, submit the receipt(s) online through Oct. 30, and you'll get a $25 Costco Shop Card for your next trip. Better yet, you can double up, buying $200 worth of products to earn two $25 cards. (The offer is capped at two cards per Costco membership.)

Not already a Costco member? You can apply here.

More than two dozen P&G brands are eligible, including Bounty, Charmin, Crest, Dawn, Head & Shoulders, Mr. Clean, Olay, Pantene, Swiffer, and Tide. There are a few exceptions: Braun, Pampers, SK-II, select Oral-B rechargeable toothbrushes, and all P&G items over $75.

Select Procter & Gamble products will be on sale during the promotion, making the deal that much sweeter. Here are a few of the highlights: 

Costco's regular slate of monthly members-only savings, including non-P&G products, also runs through Sept. 26. Whenever you shop, remember that items are often marked up on, so for the best deal, be sure to head to the store in person.

Related: Why Shoppers Are Addicted to Costco

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