There is no upper limit – you can add special effects, an exclusive audio track recorded by a symphony orchestra and win the Cannes Lions or some other award. But usually people are trying to save on making videos for their businesses. So the only advice that is reasonable - don’t try to save too much. After all, this video is a part of your brand policy! If you’re short of money, try to find a compromise solution for your animated explainer video that shall not affect the quality. For example, you can reduce length of an explainer video, or exclude character animation (and don’t use a symphony orchestra!) to reduce expenses. Anyhow, so many factors can amend the price of an explainer video, that we’ve got another article on the subject.