You really need to read the PBS HO GUIDANCE for dependents.. Page 9 and Paragraph 40-44
http://www.ukba.homeoffice.gov.uk/sitec ... policy.pdf
Family member of a Tier 1 Migrant
If the Tier 1 Migrant is outside the United Kingdom or has been present in the United Kingdom 40. for less than 12 months, each family member of the Tier 1 Migrant must show that he/she, the Tier 1 Migrant, or (for children) his/her other parent who is also legally present in the United Kingdom has at least £1600 to support him/her; this is in addition to any funds the Tier 1 Migrant needs to prove he/she has enough money to support himself/herself.
If the Tier 1 Migrant has been in the United Kingdom for 12 months or more, each family 41. member of the Tier 1 Migrant must have £533 to support himself/herself.
PBS (D) Guidance - page 10
PBS (Dependant) Policy guidance
For example, the Tier 1 Migrant has been in the UK for 6 months and is making an application 42. at the same time as his/her spouse and two children. He/she must show that he/she has £1600 for his spouse and a further £1600 for each child, in addition to £800 required for his/her own support. In total the family will require evidence that they hold £5600 in available funds (£1600 x 3 = £4800 + £800).
If the same Tier 1 Migrant and his family had been present in the UK for two years, they would 43. require evidence that they held £2399 (£533 x 3 = £1599 + £800) in available funds.
If a family member applies separately from the Tier 1 Migrant, there must still be enough funds 44. to support each member of the family. Therefore in the example above, if the family has a third child, the main applicant has been in the United Kingdom for two years and the family applies for leave to remain for the third child separately, they must provide evidence that they have an additional £533 in available funds
