Spring Cleaning Deals at Costco: What to Buy in March 2026

March is traditionally one of the best months to stock up on cleaning supplies at Costco. Here's what our price tracking data tells us to expect.

Historical Price Patterns

Based on three years of price tracking, Costco consistently runs promotions on cleaning supplies in March. Expect deals on vacuum cleaners, mops, cleaning solutions, and organizational products.

What to Watch For

Dyson Vacuums: Dyson models typically see their second-best pricing of the year in March (after Boxing Day). If you missed the February coupon book deal on the V15, another opportunity is likely.

Swiffer & Cleaning Bundles: March coupon books frequently feature Swiffer WetJet bundles and refill packs at $5-8 off.

Kirkland Cleaning Products: Laundry detergent, dish pods, and surface cleaners rotate through sales on roughly a 3-month cycle. March is due for another round.

Organizational Products

Spring is when Costco stocks up on storage bins, closet organizers, and garage shelving. These are typically best priced when they first arrive — prices rarely drop further once the season is underway.

Our Advice

Set up price alerts on FindMyPrice for the cleaning products you use regularly. When March deals hit, stock up for 3-6 months. The per-unit savings on bulk cleaning supplies are some of the best at Costco.