As many as you like. Seriously. Most production companies will limit you to 3 amends, but we think this is crazy. It's crucial we're all happy with each stage of the process, or we'll be running up hill from there on. That said, we do have one rule. Once you've signed off a stage, we may add additional fees if we're asked to revise that stage later. For example, if we've completed the animation and you ask for a change to the visual storyboard, we'll often charge additional for this as it requires a rework of the animation. It very, very rarely happens though thanks to our rock-solid video production process.