Indian dependents on your 1040: SSN if eligible, ITIN if not. Don't mix the two.

An SSN (Social Security Number) is issued by the US Social Security Administration to US citizens, permanent residents (green card holders), and certain visa holders authorized to work. The Indian-side counterpart for tracking residency is Section 6 of the Income-tax Act.

An ITIN (Individual Taxpayer Identification Number) is issued by the IRS via Form W-7 to anyone NOT eligible for an SSN but who needs to file a US tax return or be claimed as a dependent on one.

For Indian-Americans:

US-born children: SSN (apply via Form SS-5 with the SSA).

Indian-passport spouse on H-4 visa: ITIN if the spouse doesn't have work authorization; SSN if the spouse has EAD-based authorization.

Indian-resident parents claimed as dependents: ITIN.

Indian-passport children moving to the US later: SSN once authorized.

Mixing them up on a 1040 triggers IRS rejection and 6 to 8 months of delay.

Form W-7 is filed alongside (or before) the 1040 it applies to. Three submission paths:

Mail to IRS Austin TX with original passport + 1040.

In-person at an IRS Taxpayer Assistance Center with original passport.

Through an IRS Certifying Acceptance Agent (CAA) who certifies the passport copy locally and submits.

The CAA path is the cleanest for Indian-Americans who don't want to mail their original passport. Most Indian Consulates and major Indian-American tax-prep firms have CAA agents. Cost: $75 to $200 per ITIN.

Processing timeline:

Mail/CAA: 6 to 8 weeks if no documentation issues.

In-person at TAC: 4 to 6 weeks.

If the W-7 is submitted with the 1040, the entire return waits for the ITIN to issue. Pre-filing the W-7 avoids this delay; you have the ITIN ready when the 1040 lands.

An ITIN is a US tax filing number, valid only for US 1040 purposes. It doesn't replace Indian PAN or Aadhaar.

Indian dependents (parents, in-laws) claimed on a US 1040 still need:

Indian PAN if they have Indian-source income (rental, FD, dividends).

Aadhaar for Indian banking and KYC.

A valid TRC if they're claiming DTAA benefits in India.

For an Indian-American claiming Bengaluru-based parents as dependents: parents need an ITIN for the US 1040, plus their existing Indian PAN for any Indian-source income.

The Indian dependents themselves don't file Indian ITRs based on their US-side ITIN; they file based on their Indian PAN under standard Indian tax rules. The two systems are independent.

A New Jersey-based Indian-American couple with US income $200,000:

US-born child (age 5): SSN.

H-4 spouse (no work authorization): ITIN.

Bengaluru-resident mother claimed as dependent: ITIN.

Without the dependent ITINs, the IRS rejects dependent exemptions; the Child Tax Credit and Credit for Other Dependents fall off. For 2026, the Credit for Other Dependents is $500 per non-child dependent (a flat dollar credit, roughly 0.5% of a typical Indian-American household's $200,000 federal tax base, but real money). Missing the mother's ITIN: $500 forfeited annually.

For the H-4 spouse without an ITIN, the family must file Married Filing Separately, losing access to several credits. MFS rate brackets are roughly half of Married Filing Jointly. Tax bill jumps by $1,500 to $4,000 for typical filers.

Applying for ITINs costs $200 to $400 (CAA fees for two ITINs). The break-even is roughly 1 year. Worth doing pre-filing.

Indian-side: the Bengaluru-based mother continues to file her Indian ITR-1 or ITR-2 based on her Indian PAN. The US ITIN doesn't trigger any Indian-side filing.

We handle the Indian side for any dependents being claimed on US returns. Form W-7 / ITIN application is US-side; we work with US-side CAAs on referral.

Indian-side scope for the dependent: Indian PAN + Aadhaar maintenance, Form 10F refile if the dependent has DTAA-claimable income, Section 119(2)(b) condonation for past TDS recovery, Schedule FA filings if the dependent's foreign assets cross ₹20 lakh.

Fee: 15% of recovered Indian TDS for the dependent, contingent. Annual filing for the dependent's Indian ITR: ₹2,499 flat per year. Form 10F renewal for the dependent: ₹799 flat.

If you're claiming Indian-resident parents on your 1040 and they have rental or NRO income in India, book free CA appointment for the cross-border filing setup. Most engagements line up the ITIN, the dependent's Indian recovery, and the joint cross-border filing flow in one session.

Q: My H-4 spouse just got an EAD. Should we transition from ITIN to SSN?

A: Yes. Once the spouse has work authorization (EAD-approved), apply for an SSN via Form SS-5. Then file Form 1040X amendments to replace the ITIN with the new SSN going forward. The old ITIN gets retired. Don't mix on the same return; that triggers IRS rejection.

Q: My Bengaluru parents claim me as a dependent in India for some pension benefit. Does that conflict with claiming them on my 1040?

A: No. The two systems are independent. Indian-side dependent status (for medical insurance, etc.) doesn't affect US-side dependent claim. Just confirm that the parents meet the IRS dependent test (gross income limit + support test).

Q: I missed claiming my mother in 2023. Can I amend?

A: Yes. File Form 1040X for 2023 within 3 years of the original filing date. Apply for her ITIN via Form W-7 if she doesn't have one yet. Refund issues 4-8 months after the amended return.

Q: My parents visit me in the US 6 months a year. Are they still Indian-resident for tax?

A: Probably yes. Section 6 of the Indian Income-tax Act tests 182+ days physical presence. If they're outside India 6 months, they're under the threshold and qualify as NRI for that year. Book free CA appointment for the dependency + residency check.

Q: ITIN expires? Renewal?

A: Yes. ITINs expire if not used on a US tax return for 3 consecutive years. To renew, file a new Form W-7 marked 'Renewal'. Same documentation. Plan ahead for elderly Indian parents you don't claim every year.