DOES MY CLIENT NEED A FILL?
As a rule of thumb, your client should be at 40% for you to work on her fills.
It shouldn’t be any less than this, otherwise, it will already be a full set.
This is why carefully assessing your client’s lash condition first is very important before carrying on with the fills.
Never promise your clients a fill without taking a look at the lashes first because you may end up doing a full set for the price of a lash fill.
It’ll be unethical to inform your client in the midst of the procedure that she’ll need to pay more because it’s “no longer a fill”.
If you’re still not sure what 40% should look like, you may refer to this video or this picture.