How long is my DigiD valid?
After you have activated your DigiD, it remains valid for a period of 3 years after the moment you have used the DigiD for the last time.
Every time you use your DigiD again a new period of 3 years starts. So as long as you keep using the DigiD it will stay valid.
If you provided your e-mail address when you applied for your DigiD, you will receive a warning 30 thirty days before your DigiD expires.