The primary reason for in-migration to Haryana is:

Employment opportunities
Education
Family reunification
Seeking refuge

The primary reason for in-migration to Haryana is employment opportunities. The state has a strong industrial base, with a number of major manufacturing and IT companies located there. This has attracted a large number of workers from other parts of India, who are seeking better job prospects.

Education is another important reason for in-migration to Haryana. The state has a number of good universities and colleges, which attract students from all over India. This has led to the growth of a large student population in the state.

Family reunification is also a factor in in-migration to Haryana. Many people move to the state to be with their family members who are already living there. This is especially common among people from rural areas who move to urban areas in search of better job opportunities.

Seeking refuge is not a major reason for in-migration to Haryana. The state is relatively peaceful and does not have a large refugee population.

In conclusion, the primary reason for in-migration to Haryana is employment opportunities. The state has a strong industrial base, with a number of major manufacturing and IT companies located there. This has attracted a large number of workers from other parts of India, who are seeking better job prospects.