Hi, no they can't increase. There are sometimes increases but only at the start of a year.

Some things to take into account:

• There is often a small price increase at the beginning of the year.
• Passes have prices in euro, so if you're looking in another currency, then price may vary, following the exchange rate.
• There is sometimes a temporary discount. If you're buying a mobile pass, you can wait until, say, an hour before you board your first train, before you buy your pass. That means you can wait and see whether any promotional offer comes along. Subscribe to the Eurail newsletter to be informed when an offer starts.