diff --git a/backend/app/controllers/admin/passwords_controller.rb b/backend/app/controllers/admin/passwords_controller.rb
index 31a6d8d..52742fd 100644
--- a/backend/app/controllers/admin/passwords_controller.rb
+++ b/backend/app/controllers/admin/passwords_controller.rb
@@ -24,6 +24,11 @@ module Admin
         return render :edit, status: :unprocessable_entity
       end
 
+      if PasswordComplexity.same_as_current?(current_admin_account, params[:password])
+        flash.now[:alert] = t("admin.flash.password_same_as_current")
+        return render :edit, status: :unprocessable_entity
+      end
+
       if current_admin_account.update(password: params[:password])
         redirect_to admin_root_path, notice: t("admin.flash.password_updated")
       else
diff --git a/backend/app/controllers/api/v1/accounts_controller.rb b/backend/app/controllers/api/v1/accounts_controller.rb
index 0f6b438..d903ed3 100644
--- a/backend/app/controllers/api/v1/accounts_controller.rb
+++ b/backend/app/controllers/api/v1/accounts_controller.rb
@@ -51,6 +51,7 @@ module Api
         when :too_long then "Password cannot exceed 72 characters"
         when :too_weak
           "Password must include at least 3 of: lowercase, uppercase, number, symbol"
+        when :same_as_current then "New password must be different from the current password"
         when :mismatch then "Passwords do not match"
         else "Unable to update password"
         end
diff --git a/backend/app/controllers/public/password_resets_controller.rb b/backend/app/controllers/public/password_resets_controller.rb
index 7bb941b..28d62e7 100644
--- a/backend/app/controllers/public/password_resets_controller.rb
+++ b/backend/app/controllers/public/password_resets_controller.rb
@@ -40,6 +40,12 @@ module Public
         return render :edit, status: :unprocessable_entity
       end
 
+      if PasswordComplexity.same_as_current?(@user, params[:password])
+        flash.now[:alert] = t("flash.password_resets.password_same_as_current")
+        @token = params[:token]
+        return render :edit, status: :unprocessable_entity
+      end
+
       @user.update!(password: params[:password])
       @user.clear_password_reset!
       redirect_to public_login_path, notice: t("flash.password_resets.password_updated")
diff --git a/backend/app/models/concerns/password_complexity.rb b/backend/app/models/concerns/password_complexity.rb
index f07a261..5c43f32 100644
--- a/backend/app/models/concerns/password_complexity.rb
+++ b/backend/app/models/concerns/password_complexity.rb
@@ -31,6 +31,13 @@ module PasswordComplexity
       matched >= REQUIRED_CLASSES
     end
 
+    # Confronta con il digest già salvato (prima di assegnare la nuova password).
+    def same_as_current?(record, password)
+      return false if password.blank? || !record.respond_to?(:authenticate)
+
+      record.authenticate(password).present?
+    end
+
     def requirement_summary
       I18n.t("password_policy.hint")
     end
diff --git a/backend/app/services/users/change_password.rb b/backend/app/services/users/change_password.rb
index ce1f22b..39b57d7 100644
--- a/backend/app/services/users/change_password.rb
+++ b/backend/app/services/users/change_password.rb
@@ -31,6 +31,10 @@ module Users
         return Result.new(ok?: false, error: code == :blank ? :too_short : code)
       end
 
+      if PasswordComplexity.same_as_current?(@user, @password)
+        return Result.new(ok?: false, error: :same_as_current)
+      end
+
       unless @user.update(password: @password)
         complexity_error = @user.errors.details[:password]&.any? { |d| d[:error] == :complexity }
         return Result.new(ok?: false, error: complexity_error ? :too_weak : :too_short)
diff --git a/backend/config/locales/admin.de.yml b/backend/config/locales/admin.de.yml
index 1b8b270..d65159c 100644
--- a/backend/config/locales/admin.de.yml
+++ b/backend/config/locales/admin.de.yml
@@ -20,6 +20,7 @@ de:
       password_too_short: Das neue Passwort muss mindestens 8 Zeichen lang sein
       password_too_long: Das neue Passwort darf höchstens 72 Zeichen lang sein
       password_too_weak: Das neue Passwort muss mindestens 3 aus Kleinbuchstaben, Großbuchstaben, Zahlen und Symbolen enthalten
+      password_same_as_current: Das neue Passwort muss sich vom aktuellen unterscheiden
       password_mismatch: Die Passwörter stimmen nicht überein
       password_updated: Passwort aktualisiert
       ops_acknowledged: Vorfall übernommen
diff --git a/backend/config/locales/admin.en.yml b/backend/config/locales/admin.en.yml
index 8f2d686..1f8d295 100644
--- a/backend/config/locales/admin.en.yml
+++ b/backend/config/locales/admin.en.yml
@@ -20,6 +20,7 @@ en:
       password_too_short: The new password must be at least 8 characters long
       password_too_long: New password cannot exceed 72 characters
       password_too_weak: "New password must include at least 3 of: lowercase, uppercase, numbers and symbols"
+      password_same_as_current: New password must be different from the current password
       password_mismatch: Passwords do not match
       password_updated: Password updated
       ops_acknowledged: Incident acknowledged
diff --git a/backend/config/locales/admin.es.yml b/backend/config/locales/admin.es.yml
index 5342ad9..e1f1c9c 100644
--- a/backend/config/locales/admin.es.yml
+++ b/backend/config/locales/admin.es.yml
@@ -20,6 +20,7 @@ es:
       password_too_short: La nueva contraseña debe tener al menos 8 caracteres
       password_too_long: La nueva contraseña no puede superar los 72 caracteres
       password_too_weak: "La nueva contraseña debe incluir al menos 3 entre: minúsculas, mayúsculas, números y símbolos"
+      password_same_as_current: La nueva contraseña debe ser distinta de la actual
       password_mismatch: Las contraseñas no coinciden
       password_updated: Contraseña actualizada
       ops_acknowledged: Incidencia asumida
diff --git a/backend/config/locales/admin.fr.yml b/backend/config/locales/admin.fr.yml
index d64e47c..a9a0915 100644
--- a/backend/config/locales/admin.fr.yml
+++ b/backend/config/locales/admin.fr.yml
@@ -20,6 +20,7 @@ fr:
       password_too_short: Le nouveau mot de passe doit contenir au moins 8 caractères
       password_too_long: Le nouveau mot de passe ne peut pas dépasser 72 caractères
       password_too_weak: "Le nouveau mot de passe doit inclure au moins 3 parmi : minuscules, majuscules, chiffres et symboles"
+      password_same_as_current: "Le nouveau mot de passe doit être différent de l'actuel"
       password_mismatch: Les mots de passe ne correspondent pas
       password_updated: Mot de passe mis à jour
       ops_acknowledged: Incident pris en charge
diff --git a/backend/config/locales/admin.it.yml b/backend/config/locales/admin.it.yml
index f70e2f5..ffdf74e 100644
--- a/backend/config/locales/admin.it.yml
+++ b/backend/config/locales/admin.it.yml
@@ -20,6 +20,7 @@ it:
       password_too_short: La nuova password deve avere almeno 8 caratteri
       password_too_long: La nuova password non può superare i 72 caratteri
       password_too_weak: "La nuova password deve includere almeno 3 tra: minuscole, maiuscole, numeri e simboli"
+      password_same_as_current: La nuova password deve essere diversa da quella attuale
       password_mismatch: Le password non coincidono
       password_updated: Password aggiornata
       ops_acknowledged: Incidente preso in carico
diff --git a/backend/config/locales/app.de.yml b/backend/config/locales/app.de.yml
index 1e71300..4e6f62c 100644
--- a/backend/config/locales/app.de.yml
+++ b/backend/config/locales/app.de.yml
@@ -624,6 +624,7 @@ de:
       password_too_short: Das Passwort muss mindestens 8 Zeichen lang sein
       password_too_long: Das Passwort darf höchstens 72 Zeichen lang sein
       password_too_weak: Das Passwort muss mindestens 3 aus Kleinbuchstaben, Großbuchstaben, Zahlen und Symbolen enthalten
+      password_same_as_current: Das neue Passwort muss sich vom aktuellen unterscheiden
       password_mismatch: Die Passwörter stimmen nicht überein
       password_updated: Passwort aktualisiert. Du kannst dich jetzt anmelden.
     accounts:
@@ -633,6 +634,7 @@ de:
       password_too_short: Das Passwort muss mindestens 8 Zeichen haben
       password_too_long: Das Passwort darf höchstens 72 Zeichen lang sein
       password_too_weak: Das Passwort muss mindestens 3 aus Kleinbuchstaben, Großbuchstaben, Zahlen und Symbolen enthalten
+      password_same_as_current: Das neue Passwort muss sich vom aktuellen unterscheiden
       password_mismatch: Die Passwörter stimmen nicht überein
       password_updated: Passwort aktualisiert.
     replay:
diff --git a/backend/config/locales/app.en.yml b/backend/config/locales/app.en.yml
index 7c2f9db..e91282e 100644
--- a/backend/config/locales/app.en.yml
+++ b/backend/config/locales/app.en.yml
@@ -624,6 +624,7 @@ en:
       password_too_short: Password must be at least 8 characters
       password_too_long: Password cannot exceed 72 characters
       password_too_weak: "Password must include at least 3 of: lowercase, uppercase, numbers and symbols"
+      password_same_as_current: New password must be different from the current password
       password_mismatch: Passwords don't match
       password_updated: Password updated. You can now log in.
     accounts:
@@ -633,6 +634,7 @@ en:
       password_too_short: Password must be at least 8 characters
       password_too_long: Password cannot exceed 72 characters
       password_too_weak: "Password must include at least 3 of: lowercase, uppercase, numbers and symbols"
+      password_same_as_current: New password must be different from the current password
       password_mismatch: Passwords do not match
       password_updated: Password updated.
     replay:
diff --git a/backend/config/locales/app.es.yml b/backend/config/locales/app.es.yml
index 476e945..c1ff4ae 100644
--- a/backend/config/locales/app.es.yml
+++ b/backend/config/locales/app.es.yml
@@ -624,6 +624,7 @@ es:
       password_too_short: La contraseña debe tener al menos 8 caracteres
       password_too_long: La contraseña no puede superar los 72 caracteres
       password_too_weak: "La contraseña debe incluir al menos 3 entre: minúsculas, mayúsculas, números y símbolos"
+      password_same_as_current: La nueva contraseña debe ser distinta de la actual
       password_mismatch: Las contraseñas no coinciden
       password_updated: Contraseña actualizada. Ya puedes iniciar sesión.
     accounts:
@@ -633,6 +634,7 @@ es:
       password_too_short: La contraseña debe tener al menos 8 caracteres
       password_too_long: La contraseña no puede superar los 72 caracteres
       password_too_weak: "La contraseña debe incluir al menos 3 entre: minúsculas, mayúsculas, números y símbolos"
+      password_same_as_current: La nueva contraseña debe ser distinta de la actual
       password_mismatch: Las contraseñas no coinciden
       password_updated: Contraseña actualizada.
     replay:
diff --git a/backend/config/locales/app.fr.yml b/backend/config/locales/app.fr.yml
index d34f3a1..d7fd649 100644
--- a/backend/config/locales/app.fr.yml
+++ b/backend/config/locales/app.fr.yml
@@ -624,6 +624,7 @@ fr:
       password_too_short: Le mot de passe doit comporter au moins 8 caractères
       password_too_long: Le mot de passe ne peut pas dépasser 72 caractères
       password_too_weak: "Le mot de passe doit inclure au moins 3 parmi : minuscules, majuscules, chiffres et symboles"
+      password_same_as_current: "Le nouveau mot de passe doit être différent de l'actuel"
       password_mismatch: Les mots de passe ne correspondent pas
       password_updated: Mot de passe mis à jour. Tu peux maintenant te connecter.
     accounts:
@@ -633,6 +634,7 @@ fr:
       password_too_short: Le mot de passe doit contenir au moins 8 caractères
       password_too_long: Le mot de passe ne peut pas dépasser 72 caractères
       password_too_weak: "Le mot de passe doit inclure au moins 3 parmi : minuscules, majuscules, chiffres et symboles"
+      password_same_as_current: "Le nouveau mot de passe doit être différent de l'actuel"
       password_mismatch: Les mots de passe ne correspondent pas
       password_updated: Mot de passe mis à jour.
     replay:
diff --git a/backend/config/locales/app.it.yml b/backend/config/locales/app.it.yml
index 613df5e..341e9a1 100644
--- a/backend/config/locales/app.it.yml
+++ b/backend/config/locales/app.it.yml
@@ -624,6 +624,7 @@ it:
       password_too_short: La password deve avere almeno 8 caratteri
       password_too_long: La password non può superare i 72 caratteri
       password_too_weak: "La password deve includere almeno 3 tra: minuscole, maiuscole, numeri e simboli"
+      password_same_as_current: La nuova password deve essere diversa da quella attuale
       password_too_short: La password deve avere almeno 8 caratteri
       password_too_long: La password non può superare i 72 caratteri
       password_too_weak: "La password deve includere almeno 3 tra: minuscole, maiuscole, numeri e simboli"
@@ -636,6 +637,7 @@ it:
       password_too_short: La password deve avere almeno 8 caratteri
       password_too_long: La password non può superare i 72 caratteri
       password_too_weak: "La password deve includere almeno 3 tra: minuscole, maiuscole, numeri e simboli"
+      password_same_as_current: La nuova password deve essere diversa da quella attuale
       password_too_long: La password non può superare i 72 caratteri
       password_too_weak: "La password deve includere almeno 3 tra: minuscole, maiuscole, numeri e simboli"
       password_mismatch: Le password non coincidono
diff --git a/backend/spec/models/password_complexity_spec.rb b/backend/spec/models/password_complexity_spec.rb
index 12b6634..4e928f9 100644
--- a/backend/spec/models/password_complexity_spec.rb
+++ b/backend/spec/models/password_complexity_spec.rb
@@ -21,6 +21,15 @@ RSpec.describe PasswordComplexity do
     end
   end
 
+  describe ".same_as_current?" do
+    let!(:user) { User.create!(email: "same@example.com", name: "Same", password: "Password123", role: "coach") }
+
+    it "detects when the new password matches the current one" do
+      expect(described_class.same_as_current?(user, "Password123")).to eq(true)
+      expect(described_class.same_as_current?(user, "OtherPass123")).to eq(false)
+    end
+  end
+
   describe "User validation" do
     it "blocks weak passwords on create" do
       user = User.new(email: "weak@example.com", name: "Weak", password: "password123", role: "coach")
diff --git a/backend/spec/requests/account_spec.rb b/backend/spec/requests/account_spec.rb
index eb9d98c..3a87e8c 100644
--- a/backend/spec/requests/account_spec.rb
+++ b/backend/spec/requests/account_spec.rb
@@ -73,6 +73,19 @@ RSpec.describe "Account API", type: :request do
       expect(JSON.parse(response.body)["error"]).to match(/3 of/i)
       expect(user.reload.authenticate("Password123")).to be_truthy
     end
+
+    it "rejects reusing the current password" do
+      patch "/api/v1/account/password",
+            params: {
+              current_password: "Password123",
+              password: "Password123",
+              password_confirmation: "Password123"
+            },
+            headers: auth_headers
+      expect(response).to have_http_status(:unprocessable_entity)
+      expect(JSON.parse(response.body)["error"]).to match(/different/i)
+      expect(user.reload.authenticate("Password123")).to be_truthy
+    end
   end
 
   describe "POST /api/v1/auth/password/forgot" do