Which of the following income sources cannot be used to qualify an applicant?

The source of income that cannot be used to qualify an applicant in this context is net income from rental property at a percentage that is not standard practice. While rental income can generally be considered for qualification purposes, it typically requires specific documentation and verification processes. Generally, lenders use a percentage of gross rental income after accounting for expenses (like vacancies and maintenance) rather than net income, which can be more variable and potentially less reliable.

The other sources listed are widely accepted methods for qualifying borrowers. A two-year employment history verified with a Verification of Employment (VOE) is crucial as it provides assurance of stable income. Consistent overtime received over two years can also be included in income calculation since it demonstrates reliability and the ability to sustain an income level. Similarly, child support, when well-documented and projected for future payments, serves as a stable source of income.

Thus, while rental income is useful, the specific qualification of 95 percent of net income is not a standard practice, making it the correct choice for this question.