As an International Student, the decision that you make will have an impact on your visa and your Immigration Health Surcharge (IHS) fee.
If you choose the 12 month route without the six month placement then you would incur a lower IHS fee as the course and visa will be shorter.
A one year masters with no placement will incur an IHS fee of £225.
If while you are studying at Aston you decide that you wish to do a six month placement you will have to make a second visa application.
Students are not permitted to extend their visa while in the UK if the reason for an extension is to add a placement.
As the course will be extended to an 18 month course, you will have to return overseas, apply for entry clearance and submit an application for a new Tier 4 General visa.
This may disrupt your studies part way through your degree. Timing will need to be considered as you will have to return overseas, submit an application, wait for a decision and then return to the UK to complete your placement.
You will have to pay a second visa application fee when you apply for your visa from overseas, currently £335.
There will be an additional IHS fee, the cost will depend on when the student applies for the visa. There may (not guaranteed) be a refund given for any time unspent on the previous visa.
Please contact the International Student Advice Team if you have any questions about how these placement years affect your Tier 4 visa application.