Do you have to pay royalty for free programs?

If you are making a free game (or other program), do you still have to pay 5% royalty or is that only when you get money? I am currently working on a non-profit game and was curious.

According to the legal guidelines the royalties star after the first $3000 made off sales. So no you do not have to pay anything to unreal. But I do suggest you let them know about your release. I’m sure they would love to see what you have made with their software. Visit this link to learn more. Under section 4.Royalties
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that use to be 3,000 USD per quarter, not for sure if that has changed

No its has not. It’s still per quarter