diff --git a/src/gui/pricedialog.cpp b/src/gui/pricedialog.cpp
index cf0bc1e..9b657e8 100644
--- a/src/gui/pricedialog.cpp
+++ b/src/gui/pricedialog.cpp
@@ -1,12 +1,24 @@
 #include "pricedialog.h"
 
+#include <cmath>
+
+#include <QMessageBox>
+
 PriceDialog::PriceDialog(QWidget* parent, Qt::WindowFlags f) : QDialog(parent, f)
 {
     ui_.setupUi(this);
     ui_.priceSpinBox->setFocus();
 }
 
-int PriceDialog::getPrice() const
+int PriceDialog::getPrice() const { return static_cast<int>(ui_.priceSpinBox->value() * 100); }
+
+void PriceDialog::accept()
 {
-    return static_cast<int>(ui_.priceSpinBox->value() * 100);
+    if (static_cast<int>(std::round(ui_.priceSpinBox->value() * 100.0L)) % 50 != 0) {
+        QMessageBox(QMessageBox::Icon::Warning, "Falsche Preiseingabe",
+                    "Es sind 0,50 Cent-Schritte erlaubt", QMessageBox::StandardButton::Ok, this)
+            .exec();
+    } else {
+        QDialog::accept();
+    }
 }
\ No newline at end of file
diff --git a/src/gui/pricedialog.h b/src/gui/pricedialog.h
index ce7fbaa..970b1c5 100644
--- a/src/gui/pricedialog.h
+++ b/src/gui/pricedialog.h
@@ -16,7 +16,7 @@ class PriceDialog : public QDialog
 
   private:
     void on_model_duplicateSellerNo(const QString& message);
-    //virtual void accept() override;
+    virtual void accept() override;
     Ui::PriceDialog ui_;
 };