From January 11th, it'll be £5 a month, up from the previous £2. With a lot of people switching to the account for the high interest rate, this'll be irritating news.
As it'll now be charged at £60 per year, which could still be a good deal for those with a reasonable amount in their account. For those with smaller balances, this isn't very good news at all.
So, with £2,500, at £2, you'd earn £16 after charges. With the new £60, it'll wipe your interest and, in the end, you'll be paying Santander £20 to run your account.
It is worth shopping around now, and we previously wrote about this, with some good tips and links to where you can compare accounts which will work for you best.