Another great benefit of choosing Invisalign over metal braces is the shortened treatment plans. The average treatment time for Invisalign cases is 12-18 months but can be longer or shorter depending on the kind of orthodontic issues that are present and how often the aligners are worn. You will get an estimate for how long your specific treatment plan should take at your consultation, and then it is up to you to wear your Invisalign aligners as frequently as possible to help ensure your treatment plan stays on track.