Which stores allow stacking, which secretly do, and which void your cart for trying. We dug into the data, talked to industry insiders and tested the claims ourselves before writing a word of this guide.
What actually matters
Most shoppers focus on the headline percentage, but the fine print decides whether a promotion is genuinely good. Minimum spends, category exclusions and stacking rules change the real value of an offer dramatically. Our rule of thumb: calculate the effective discount on the basket you would actually buy, not the theoretical maximum.
A 40% code you cannot use is worth less than a 15% code that applies to everything.
How to get the most out of it
- Verify the code minutes before checkout - offers rotate faster than most sites update.
- Combine sitewide codes with clearance sections; that is where effective discounts get dramatic.
- Sign up for price-drop alerts on big-ticket items instead of impulse buying.
The bottom line
Shopping well is a skill, and it compounds. The strategies above routinely turn a good deal into a great one - and every code we publish has been verified by a human editor first.