The sponsor will have to meet the Minimum Income Requirement of at least £18,600. This rises to £22,400 if you’re sponsoring your partner and a child who is a non-EEA national, and rises by £2,400 for each additional child. So if you’re sponsoring your non-EEA partner and their 3 non-EEA national children, you must prove an annual income of at least £27,200 

Usually, only the income of the sponsor (the British citizen or settled resident) counts towards the income requirement. If you’re in salaried employment (so you’re paid a fixed amount per year, usually on a monthly basis), you will have to show 6 months of payslips. Make sure you are using the most recent payslips when you come to apply – the most recent document included in your application should be dated no more than 28 days before the date of your application. If you’re in unsalaried employment (you are paid by the hour) or you are self-employed, you will have to prove your incom…