When is L'Oreal Paris Preference Hair Colour 10.21 Very Very Light Pearl Blonde next half price at Woolworths?

Maybe half-price

2 Dec – 22 Dec

That's about 3 in 10 chance, based on 4 past gaps between half-price sales — typically about every 6 weeks.

On special this week at $16.80 (40% off) — a real discount, but not half price.