One qualifying investment covers one investor plus a spouse and any unmarried children under 21. Everybody else in the family needs their own $800,000 and their own petition. There is no family rate, and no way to attach a parent or an adult son to somebody else's capital.
That single rule settles most of the question. The rest is timing.
Who travels on a single petition
Immigration law calls them derivatives. When you file Form I-526E as a regional center investor, your spouse and each unmarried child under 21 can immigrate on the strength of that one filing. A child, for this purpose, means unmarried and under 21 at the moment that matters. Stepchildren and adopted children can qualify under the same definition, with extra documentary rules of their own.
Derivatives are not passengers on the paperwork. Each one files a separate green card application inside the United States, or a separate immigrant visa application through consular processing at a US embassy abroad. Each pays government fees. Each sits for the medical exam and the interview.
Removal of conditions works the other way around. The principal investor files one Form I-829 and lists the derivatives on it. They do not each file their own.
Can two people share one $800,000?
No. Each petitioner must place the full required amount at risk in their own name and must be credited with ten full time jobs that belong to nobody else. Many investors can put money into the same new commercial enterprise, and most regional center offerings are built exactly that way, with each investor bringing a separate $800,000 and a separate job allocation. Splitting one contribution between two petitioners fails the capital test and the job test at once.
A married couple looks like the exception. It is not. Marital property can fund the investment while only one spouse signs as petitioner, and the other comes along as a derivative.
The age 21 cutoff, and what the Child Status Protection Act really does
A child who turns 21 before a visa number is used stops being a derivative. That is the most expensive thing that can happen to a family's EB-5 plan, and it happens quietly.
CSPA softens the blow by subtracting the time USCIS spent adjudicating the underlying petition from the child's biological age. Notice what it does not subtract: the wait for a visa number. For an investor born in a heavily oversubscribed country, most of the delay sits in that visa queue. CSPA does nothing about it. Marriage ends derivative status outright. At any age, with no formula available to save it.
Practical consequence. With a 17 year old, you are on a clock. With a 20 year old, run the numbers before wiring anything, because a second petition in the child's own name may be cheaper than a failed derivative claim. EB-5 and the F-1 Student: Green Card for Your Child, No H-1B covers the case where the child is already studying in the United States.
Adult children and parents need capital of their own
A 23 year old son cannot be added to his father's petition. A married 19 year old daughter cannot either. Parents and siblings fall outside the derivative definition entirely, as do cousins and in-laws. To immigrate through EB-5, each of those people must be the petitioner on a filing of their own, backed by a separate $800,000 in a targeted employment area or $1,050,000 outside one, and credited with ten more full time jobs that no other investor is counting.
Two petitions in one family therefore mean twenty jobs to create and two independent source of funds files, on top of roughly $1.6 million of capital at risk. Say that out loud before deciding it is the obvious answer.
A slower path exists. Once a child who immigrated as a derivative has held the green card long enough to naturalize and files Form N-400, the application for naturalization, that new citizen can, from the age of 21, petition for parents as immediate relatives, a category with no annual cap. Families sometimes solve the grandparent question that way rather than with a second $800,000.
Choosing which family member signs the petition
The petitioner should usually be whoever can document a lawful source of funds most easily. Under 8 CFR 204.6, the capital must be the petitioner's own and traced to a lawful source, with tax returns and business records behind it. A patriarch with thirty years of audited company accounts makes a stronger petitioner than his daughter who received the money last month, even when the daughter is the one who wants to live in Boston.
Children's ages are the other lever. If they are 12 and 9, the choice of petitioner barely matters. When one of them is 20, it decides the outcome.
Residence intentions matter too, because the principal investor carries the strongest expectation of actually living in the United States. Is the American EB5 Visa Worth It? Cost, Risk and Real Timelines works through that decision.
Two petitions, one pot of money
Families often fund the second petition from the same account, and this is where cases fall apart. USCIS wants two distinct pools of $800,000, each traced independently to a lawful origin. Two files, two stories. One wire of $1.6 million out of a father's account, split afterward between two petitioners who then claim to have invested their own money, invites a request for evidence and sometimes a denial.
Do it properly instead. Where a parent gifts capital to an adult child so the child can file, document the gift as a gift, with a signed gift letter plus the tax and business records showing how the parent lawfully earned that money. Path of funds matters as much as source. Every account the money passes through becomes part of the file.
What the second investment actually costs
Beyond the capital, add the regional center's administrative fee, which commonly runs into the tens of thousands of dollars and is rarely refundable, since it buys the sponsor's compliance work rather than any extra share of the project. Add government charges from the USCIS filing fee schedule for the petition and for every green card application in the household. Add legal fees. Add immigrant visa fees and medical exams for each person. Then add the risk that one project fails while the other succeeds.
Doubling exposure to project risk is the part families skip over. Two petitions placed with two different sponsors usually beat $1.6 million in one deal, and Multiple EB-5 Projects: Can You Diversify One $800,000 Investment? explains why a single investor still cannot split one $800,000 across two offerings. For the wider budget, see The Real Cost of EB-5: Fees and Expenses Beyond the $800,000.
Deadlines that press hardest on families filing twice
Three dates belong in the calendar. Petitions filed on or before 30 September 2026 are protected by 8 U.S.C. 1153(b)(5)(S), which keeps them valid even if the regional center program is not reauthorized beyond its current expiry of 30 September 2027. Minimum investment amounts face their first inflation adjustment on 1 January 2027, so an adult child who files later may owe more than $800,000 for the same green card.
Set-aside categories give a family one more lever. Of the annual EB-5 visas, 20 percent are reserved for rural projects and 10 percent for high unemployment areas, with a further 2 percent for infrastructure. Two relatives filing separate petitions can sit in different reserved pools, which occasionally moves one of them faster than the other.
What changes after you file
A child who marries loses derivative status immediately. A divorce before the green card is issued removes a spouse from the case. A baby born after filing can be added. A derivative who cannot travel with the family may usually follow to join later on the same priority date, which is why the principal's approval anchors everyone.
Tell your attorney about a wedding or a birth in the week it happens, not at the interview.