The Child Status Protection Act (CSPA) preserves green card eligibility for derivative children whose chronological age would otherwise pass 21 during long backlogs. The math is non-obvious, the stakes are massive, and the wrong calculation locks a child out of the U.S. forever.
Why CSPA exists
Before CSPA (enacted 2002), a child who turned 21 during processing "aged out" — losing derivative status. Decades of family-based and employment-based backlogs were trapping kids who'd grown up waiting. CSPA mathematically subtracts USCIS processing time from the child's age, often preserving eligibility.
The CSPA formula
CSPA Age = (Age when visa becomes available) - (Time petition was pending with USCIS)
"Time petition was pending" means the gap between filing date and approval date of the qualifying petition (I-130, I-140, etc.). It does not count time spent waiting for the priority date to become current.
Worked example — family-based
USC files I-130 for sister on January 1, 2010. The child (sister's son) is 12 at filing. I-130 approves on January 1, 2014 (4 years pending). Priority date becomes current October 1, 2026. Child's chronological age on October 1, 2026 is 28.
CSPA Age = 28 - 4 = 24. Child has aged out — CSPA does not save him.
Worked example — employment-based with NIW
EB-2 NIW I-140 filed March 1, 2024 for parent. Child is 19 at filing. I-140 approves September 1, 2024 (6 months pending). Priority date current January 1, 2026. Child's chronological age on January 1, 2026 is 21 years and 4 months.
CSPA Age = 21.33 - 0.5 = 20.83. Child is "under 21" for CSPA purposes — preserved.
The "sought to acquire" requirement
To use CSPA, the derivative must "seek to acquire" lawful permanent resident status within one year of visa availability. This means filing DS-260 (consular processing) or I-485 (adjustment of status) within that year.
USCIS interprets "sought to acquire" strictly. Missing the one-year deadline can permanently lose CSPA protection — even if the chronological age would have aged out anyway. The child must take a documented step toward immigrating.
Recent USCIS policy changes (2023-2024)
USCIS expanded CSPA in February 2023: the "visa availability" date is now generally tied to Dates for Filing chart (more generous) rather than Final Action Dates. This change preserves derivative eligibility for many more children. Some prior denials may be reopened.
What can lock CSPA in early
- File I-485 or DS-260 immediately when eligible (within the one-year sought-to-acquire window)
- For employment-based: don't delay I-140 filing once eligible
- For family-based F2A/F2B: ensure I-130 is filed promptly
- Premium processing on I-140 reduces "pending time" used in calculation — actually worse for CSPA. (Slower I-140 = more aging-out protection. Strategic tradeoff.)
When CSPA does not apply
- Diversity Visa selectees: CSPA applies but with different rules and one-year deadline tied to fiscal year
- K-1 visa derivatives: covered, but timing rules differ
- Asylum derivatives: special rules, generally protected if filed before 21