Children Abroad — US Tax Guide
Child Tax Credit eligibility, dependent rules, ITIN requirements, and US citizenship for children born abroad
Family Details
Children / Dependents
US Citizenship for Children Born Abroad
| Situation | Automatic US Citizen? | Requirements |
|---|---|---|
| Both parents US citizens, child born abroad | ✅ Yes | At least one parent must have lived in US at some point |
| One parent US citizen, married to non-citizen | ✅ Likely Yes | US parent must have been physically present in US 5 years, 2 after age 14 (if born before Nov 14, 1986: varies) |
| One parent US citizen, not married | ⚠️ Conditional | Father must have legitimated child + met presence requirements. Mother's rules simpler. |
| Child adopted by US citizen | ✅ Yes | Under Child Citizenship Act 2000 if under 18 and lawfully admitted |
| Child born to green card holder(s) | ❌ No | Child acquires LPR status, not citizenship. Must naturalise separately. |
US citizen children born abroad must have their birth registered at the nearest US embassy or consulate. Apply for a Consular Report of Birth Abroad (CRBA) — this is the official record of US citizenship. Apply before age 18. Also apply for a US passport for the child.
Child's Filing Obligations
A US citizen child born abroad has the same filing obligations as any US citizen:
- Must file a US tax return if income exceeds filing thresholds
- Must report FBAR if foreign accounts >$10,000
- Must report FATCA Form 8938 if assets above threshold
- Can claim FEIE if qualifying for PPT or BFR
- Threshold 2025: $14,600 for single filers / $1,350 if unearned income
Credit Analysis
Key Credits Explained
$2,000 Child Tax Credit (CTC)
Per qualifying child under 17 at year-end. Requires: US citizen/resident child, valid SSN (not just ITIN), lived with you >6 months, you provided >50% of support. Phase-out: reduces $50 per $1,000 of MAGI over $200k (single) or $400k (MFJ).
$1,700 Additional Child Tax Credit (ACTC)
Refundable portion of the CTC — you receive this even if you owe no tax. For expats using FEIE: ACTC = 15% × max(0, earned income after FEIE - $2,500). This means large FEIE claims can significantly reduce ACTC. Child must have SSN (not ITIN).
$500 Other Dependent Credit (ODC)
For dependents who don't qualify for CTC: children 17+, non-citizen children with ITIN only (not SSN), other qualifying relatives. Non-refundable only. Phase-out same as CTC ($200k/$400k).
Up to $3,000 Child & Dependent Care Credit
For childcare costs while you work or look for work. Foreign daycare/nanny qualifies if child is a qualifying person. Cannot use if filing MFS. Up to $3,000 for 1 child, $6,000 for 2+ children. Credit: 20–35% of qualifying expenses based on income.
FEIE vs ACTC Trade-off
Claiming the FEIE reduces the refundable ACTC because ACTC is based on "earned income" and the FEIE excludes earned income from this calculation. For families with multiple children, it may be worth running the numbers both ways — with full FEIE vs. partial FEIE — to maximise total benefit.