spouse visa need help

guys i am from nepal my wife is uk ilr now we want to apply for spouse visa but i am in confusion about her salary she has different amount of salary in every month over all yearly salary she has 18600 but the confusion is she has 1900 pound in few month and 1200 pound in few month can i still apply for the spouse visa plzz guys help me i will be really thankful to you

UKVI will factor the lowest paying month and multiply it by 12 to obtain your annual salary.

You have variable income hence you fall under catagory B. See the home office example.

The applicant’s partner lives in the UK and is a fashion photographer who does short-term
contract work for several agencies. He has periods without work and the amount he is paid
varies from job to job. Over the last 12 months he has earned a total of £20,000. In the most
recent 6 months his gross earnings are as follows: £3500, £0, £0, £2300, £3400, £500. The
application is made on the basis of meeting the financial requirement under Category B
non-salaried employment.
Under part (1) of Category B, the applicant’s partner’s current annual employment income
= (gross earnings over the last 6 months, divided by 6) multiplied by 12
= ((3500+0+0+2300+3400+500) ÷ 6) x 12
= (9,700 ÷ 6) x 12
= £19,400
Under part (2) of Category B, the applicant’s partner’s actual employment income over last
12 months
= £20,000
So both part (1) and part (2) of Category B are met.