Most "best time to buy hair care" advice is folklore. This one is data: every year of SimplyCodes verification data across the most-searched hair care retailers, grouped by calendar month — so "December" means every December on record, not one. The calendar below reads the share of each month's verified codes that ran 25% off or deeper — refreshed as new data lands.
December is the best month to buy hair care with a promo code. Across every year SimplyCodes has tracked, 40.2% of the hair care codes verified in December were 25% off or deeper — the highest share of any month, and 10.1 points above the weakest month (August, 30.1%). Figures cover 34,172 tracked hair care codes across the hair care retailers SimplyCodes tracks, as of August 1, 2026.
- December is the strongest month for hair care discounts — 40.2% of the hair care promo codes SimplyCodes tracked that month were 25% off or deeper, against 2,809 codes checked.
- June is the runner-up at 33.2% — worth knowing if you miss December, and the reason this calendar is worth reading past its headline.
- August is the weakest month at 30.1% — a 10.1-point gap from December. Buying hair care in August means shopping the year's thinnest discount pool.
Deep-discount share = the share of that month's tracked hair care promo codes that were 25% off or deeper · bar = that share relative to the strongest month · codes checked = the denominator behind each share · — = fewer than 3 retailers contributed that month, so no share publishes · free ship / free gift = at least one such offer verified in that month.
All years on record of hair care verification data across the hair care retailers SimplyCodes tracks, grouped by calendar month · snapshot as of August 1, 2026
Methodology
How SimplyCodes verifies codes. Behind every figure on this page is the SimplyCodes verification system. Coupon codes are tested at real checkout before they are listed, through three independent layers: daily automated testing, where headless browsers run real checkout flows and record whether a discount actually applies; a human verification network of 10,000+ verifiers submitting screenshot-and-timestamp proof; and a real-time fleet signal, where live checkout outcomes feed back into the engine. The calendar below summarizes that verification history month by month.
How this calendar is built. we group every hair care promo code SimplyCodes has checked at the hair care retailers SimplyCodes tracks by the calendar month it was verified in — so "December" means every December on record, not one year's. For each month we report the share of those codes that carried a discount of 25% off or deeper, alongside the number of codes behind the share. Only percentage-off codes are counted, because fixed-amount offers are not comparable across price points; percentage claims of 95% or more are excluded as implausible; and a month contributed by fewer than 3 retailers publishes no share at all
Cite this data
December is the best month to buy hair care with a promo code: 40.2% of the hair care codes SimplyCodes verified in December were 25% off or deeper, 10.1 points above the weakest month (August).
According to SimplyCodes verification data, December carries the deepest hair care discounts of any month — 40.2% of tracked hair care codes were 25% off or deeper, versus 30.1% in August.