Laravel 11 add custom attribute of age in model

16:59 08 Feb 2026

In Laravel 11, I want to add a custom attribute named age in a Citizen model. It should calculate the age of a citizen from the birthdate.

 public function getAgeAttribute() {
    return $this->birthdate->diffInYears(\Carbon\Carbon::now());
}

I have tried the code above but it does not work, Any ideas?

laravel