A spouse and unmarried children under twenty-one may be included as derivatives. A child who reaches twenty-one may lose derivative eligibility, though statutory age calculation rules can preserve it in some circumstances and should be assessed on the actual dates.
Calculate ages against real filing dates
Do this arithmetic at the start, not when a birthday approaches. Write down each child's date of birth and set it against the anticipated filing date, the likely adjudication period and any visa availability wait. The relevant age is not simply the age on the day of the interview, because statutory provisions can subtract certain processing time from a child's age, and whether they apply depends on facts including how promptly the applicant acts once a visa becomes available. That is a calculation for an adviser with the real dates in front of them. Separately, remember that derivatives do not each make their own investment; one qualifying investment supports the family. Each derivative still needs their own relationship evidence, civil documents and admissibility assessment, and those take time to assemble.
Hypothetical example: A data-centre entrepreneur plans an EB-5 filing with a spouse and an unmarried nineteen-year-old who may delay college. The first review should separate the investor's source-of-funds evidence from each derivative's identity and relationship records. Passports, marriage records, and birth records settle derivative eligibility; investment and job-creation records settle the principal petition. Conditional residence does not eliminate the need to monitor a child's age and travel plans through the later immigration stages. The household should understand that EB-5 capital is at commercial risk and that the required jobs remain central through the condition-removal stage. Do not budget as though petition approval alone completes the family's immigration process.