On October 1st (H1B start date for cap-subject cases), your immigration status changes from F1 to H1B. Your tax filing status changes too — often from non-resident alien to resident alien mid-year.
The status change that changes your taxes
On October 1st (H1B start date for cap-subject cases), your immigration status changes from F1 to H1B. Your tax filing status changes too — often from non-resident alien to resident alien mid-year.
The dual-status year
If you were on F1/OPT for part of the year and H1B for part, you may have a dual-status year — especially in years 1-3 in the US.
Dual-status filing rules:
- File Form 1040 as primary form (resident period)
- Attach Form 1040-NR as statement (non-resident period)
- Cannot claim standard deduction for the full year
- Cannot file Married Filing Jointly (unless spouse elects resident status for the full year)
The FICA exemption — don't miss this money
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F1 students are exempt from FICA taxes (Social Security + Medicare = 7.65% of income).
When you switch to H1B on October 1st, FICA kicks in. But many employers:
- Don't stop FICA properly on October 1st
- Start FICA incorrectly during OPT year
- Apply FICA to pay periods spanning the status change
If FICA was incorrectly withheld during your F1/OPT period, file IRS Form 843 to claim a refund. Average refund: $3,500-$5,000.
| Period | FICA status |
|---|---|
| F1 student (on-campus / CPT / OPT) | FICA EXEMPT |
| STEM OPT extension | FICA EXEMPT |
| H1B (from Oct 1) | FICA REQUIRED |
Tax software to use
| Period | Software | Cost |
|---|---|---|
| F1/OPT period | Sprintax | $52 federal |
| H1B period | TurboTax / FreeTaxUSA | $0-$69 |
| Dual-status year | Sprintax | $52 (handles both) |
Key documents for transition year
- W-2 from employer (covers both F1 and H1B period — FICA boxes show when it started)
- 1042-S if you had scholarship or fellowship income
- Previous year 8843 (F1 form excluding days from SPT count)
- Bank statements for Indian accounts if >$10,000
Residency election option
If you were in the US for much of the year on F1, and then H1B starts October 1, you can sometimes elect resident status for the full year using the "first year choice" election. This lets you file a joint return with a non-resident spouse and claim the full standard deduction.
Complex — recommend working with a CPA familiar with dual-status returns. Cost: $200-400. Worth it if you have a spouse or significant Indian income.
Watch the F1 to H1B money moves video →
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