In addition to the cost of your application, you will also need to demonstrate that you can cover living costs while your in the UK.
This means you will need to show that you have £1,334 per month for 9 months (£12,006) in your bank account, unless your course is shorter than 9 months*.
More information can be found here.
Applying with dependants
If you are studying at Postgraduate level only, on a Student route visa, you might be able to bring your partner/spouse or your children with you to the UK as your dependants. You will need to show additional funds for each dependant.
Student route (Child) visa students cannot bring dependants.
If you have or are applying for, leave under the Graduate route, please see the Graduate route information.
For more information on regulations and definitions, please visit the Dependants page on the UKCISA website.