With all the coupons Steam has at the moment, do they stack?

And I don't mean 2x 50% = free, I mean mathematically correct as in 100% - (100% - 50%)² = 100% - 25% = 75% total discount.

  • Actually, mathematically, (if the coupons worked that way) it would be 75% off. Like in department store clearance sales: take 50% off, then 50% off again. So $100 * 50% = $50 off; $50 * 50% = $25 off; $50 off + $25 off = $75 off. – Krazer Dec 22 '11 at 16:14
  • @Krazer precisely, leaving you with 25% of the original price. (I admit I wrote it down a bit sloppy, sorry) – Zommuter Dec 22 '11 at 16:17
  • Tis okay~ I read "of" as "off." :P – Krazer Dec 22 '11 at 16:27
  • @Krazer that would be a horrible deal: "Sir, I see you have a second 50% coupon, so you only get 25% off!":P – Zommuter Dec 22 '11 at 16:29
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    @TobiasKienzler "Oh dear, you have three 50% coupons. Good thing it's discount period!" – badp Dec 23 '11 at 0:25

No, it's one coupon per item, and most don't apply until after the sale is over. The ones that do apply now are "golden" and say otherwise.

However, if an item goes on sale and you have a coupon that is valid during those dates, you can stack these two discounts, assuming it's not explicitly forbidden by the terms of the sale.

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According to this help article:

You can use one coupon per item.

Although it doesn't give a limit per transaction, so I can't vouch that you can buy two items and apply a coupon to each.

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  • Thanks, I think one coupon per item works (otherwise one could simply buy one item at a time to circumvent this anyway). I don't know about bundles though – Zommuter Dec 22 '11 at 15:47
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    At first I would think a bundle counts as an item, but on second thought it's likely considered literally: a bundle of items. – Kenan Dec 22 '11 at 15:51

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