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Coupon codes for
Cognitive Surplus
cognitive-surplus.com
September 2026Find books, media, and current promotions from Cognitive Surplus.
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Previous coupon codes
Expired codes
These codes are kept for reference and are no longer active.
20% offEXPIRED
Expired 26.08.2026
Expired: 20% extra off at Cognitive Surplus
Historical seasonal code for selected products. It could not normally be combined with other promotions.
EXTRA20-US-6505
15% offEXPIRED
Expired 20.08.2026
Expired: 15% welcome discount at Cognitive Surplus
Historical welcome code for a qualifying first order. New-customer and minimum-spend restrictions may have applied.
WELCOME15-US-6505
25% offEXPIRED
Expired 05.08.2026
Expired: 25% VIP discount at Cognitive Surplus
Historical VIP code for a qualifying order. Account, product, and campaign restrictions may have applied.
VIP25-US-6505
10% offEXPIRED
Expired 25.07.2026
Expired: 10% off at Cognitive Surplus
Historical code for qualifying full-price items. Brand, product, and campaign exclusions applied.
SAVE10-US-6505