This depends on the type of railcard some railcards are only valid on Off-peak fares such as the 26-30 railcard, others are available to use all day such as the Senior railcard. You can view all the Railcards available here.
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A Railcard saves you money on almost every journey you take. Take one long journey, or a few shorter ones, and you'll already have made your money back. And no matter who you are, there's a Railcard for you.
While railcards might seem like an expensive investment for those who don't regularly travel by train, do not underestimate their worth. Most railcards mean you could save up to 1/3 on train fares.
When are they valid? You can travel Off-Peak on weekdays outside busy times. You can also use your Off-Peak train tickets to travel at any time on weekends and bank holidays. The times you can use your tickets vary, so use the journey planner to check for Off-Peak services.
Validity. The outward journey must be made on the date shown on the ticket, and the return journey can be made at any time within one calendar month from this date. As the name implies, the ticket is generally intended for use outside peak times.
Travel light with 1/3 off fares plus great deals on meals, days out and so much more with a Senior Railcard. The Senior Railcard also acts like a discount card where you can get great offers and deals, with discounts on food, museums and more!
Off-Peak, Super Off-PeakCan be used on a different time train providing the earlier or later train is also within the terms of conditions of the ticket.
Railcards allow you to save up to 33% off most rail fares, including discounts on Advance Purchase tickets. There are eight different railcards available. There are also a number of Regional Railcards - for more information please see the below links; 16-25 Railcard (previously Young persons Railcard)
Get 1/3 off your train tickets with a Railcard! From children to seniors, there is a Railcard to suit everyone – and you get at least 1/3 off your tickets.