The QR code itself doesn't expire. The subscription status of your dynamic QR code platform might change. If your account lapses, the redirect stops working. Keep your platform subscription active for as long as the packaging is in circulation.
How small is too small for a food packaging QR code?+
2 x 2 cm is the minimum for reliable scanning. Anything smaller risks failure on low-contrast materials or in poor lighting. If your packaging is small, a rectangular layout (wider than it is tall) sometimes fits better than a square layout.
Are QR codes free to add to packaging?+
Generating a QR code is free. Dynamic QR code platforms with analytics carry a subscription cost. Print setup for adding the code to your artwork is no different from any other design change. The main cost is in the content strategy behind the code.