how can we show income?

hi guys

if i wanna bring my wife from pakistan ,i m wondering what documents can i send from here that i m earning money(like if someone on psw status wanna apply for his wife he can easily show last 3 months payslips and thats it) but in tier1 ent case what can we show ?
is this really important to show that our business is generating income to bring dependant ?
i m surprised i have not seen anyone who brought her dependant on tier1 ent visa on this forum ?

I do not think that there are any specific requirements to show income for dependents, i know about maintance funds. if you would, you can attach accountant letter showing your income as dividends plus payslips as director if you took any salary from ur company...