I always thought that if you cancelled a building while it's being built, you got all your mineral back, but I read that the extractor trick for zerg costs 6 minerals when you cancel it.

Does this apply to all buildings/races? How is that fee calculated?

  • 3
    Since there is nothing which costs 1 mineral for Zerg, some people short hand this cost to 10.
    – tzenes
    Nov 30 '10 at 17:20

You get 75% back of the cost, minerals and gas. So if you cancel a building that costs 200 minerals and 100 gas, you'll get back 150 minerals and 75 gas.

An extracter cost 25 minerals, 25% of it is 6 (after rounding), so that's what you lose for canceling it.

Notice that this only applies to buildings - canceling a unit or an upgrade gives back the full amount of minerals and gas spent.

  • Is this regardless of how long the structure/unit has been in production?
    – Brant
    Nov 30 '10 at 17:22
  • @Brant correct, it doesn't matter how long it has been in production.
    – Oak
    Nov 30 '10 at 17:24
  • 3
    wow, I never realized I wasn't getting all my minerals back...
    – juan
    Nov 30 '10 at 17:41
  • Is this exclusive to zerg buildings or does it apply to all races? Nov 30 '10 at 19:02
  • 1
    @Raven this applies to all buildings, including Terran building add-ons.
    – Wikwocket
    Nov 30 '10 at 19:26

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