You might have that burning question of how long do fillers take to work, well not to worry as we have you covered. Dermal fillers, fortunately, have a speedy onset of action, so you won't have to wait a whole year to see the results of your injections. Nevertheless, it takes some time for these injectable treatments to absorb into your tissues, and it's typical for your dermal filler to take up to two weeks to settle completely into your face.