Hanmi CPA · Cross-Border Tax Guide
First-Year Tax Filing for New U.S. Residents — Step-by-Step
신규 미국 거주자 첫해 세금 신고 — 단계별 완전 가이드
Corrected residency start date rules, dual-status filing, pre/post income split, Korean income document checklist, FBAR/FATCA thresholds and due dates, First-Year Election trade-off analysis, and four step-by-step case examples.
Start Date = First U.S. Day
8-Step Filing Checklist
Korean Doc List
First-Year Election
Step 01
Determine Your Residency Start Date 거주자 시작일 확인
The residency start date is the single most important number in your first-year U.S. tax return. It determines when worldwide income reporting begins, when FBAR/FATCA obligations start, and what filing restrictions apply for the year.
⚠ Most Common Error: SPT Residency Starts on Your FIRST U.S. Day — NOT the Day the Formula Reaches 183:
Under IRC §7701(b) and IRS Publication 519, the residency starting date under the Substantial Presence Test (SPT) is the first day of physical presence in the U.S. during the calendar year in which the SPT is met — NOT the calendar day the weighted 3-year formula first totals 183.
If you arrived July 1 and mathematically met the SPT on October 15 (the day your weighted total reached 183), your residency start date is July 1. Korean income from July 1 onward must be reported to the IRS — not just from October 15 onward.
Under IRC §7701(b) and IRS Publication 519, the residency starting date under the Substantial Presence Test (SPT) is the first day of physical presence in the U.S. during the calendar year in which the SPT is met — NOT the calendar day the weighted 3-year formula first totals 183.
If you arrived July 1 and mathematically met the SPT on October 15 (the day your weighted total reached 183), your residency start date is July 1. Korean income from July 1 onward must be reported to the IRS — not just from October 15 onward.
Test 1
Green Card Test
If green card received while in U.S.:
Date USCIS approved your petition.
If green card received abroad: First day of U.S. physical presence AFTER receiving the green card.
Not the issuance date. Not the approval date. The first day you physically entered the U.S. with the green card.
If green card received abroad: First day of U.S. physical presence AFTER receiving the green card.
Not the issuance date. Not the approval date. The first day you physically entered the U.S. with the green card.
Test 2
Substantial Presence Test
Residency start date = First day of U.S. physical presence in the calendar year the SPT is met.
Examples:
• Arrived July 1 → SPT met Oct 15 → Start date: July 1
• Arrived Jan 1 (F-1 exemption ends) → Start date: January 1
• Arrived Oct 1 → SPT not met in arrival year → First-Year Election or non-resident
Examples:
• Arrived July 1 → SPT met Oct 15 → Start date: July 1
• Arrived Jan 1 (F-1 exemption ends) → Start date: January 1
• Arrived Oct 1 → SPT not met in arrival year → First-Year Election or non-resident
Test 3
First-Year Election
Start date = First day of the chosen 31-consecutive-day period.
Available when SPT is not met in arrival year but will be met in the following year. Must meet 31 consecutive days + 75% presence from that day through December 31.
Start date is chosen by the taxpayer within those constraints.
Available when SPT is not met in arrival year but will be met in the following year. Must meet 31 consecutive days + 75% presence from that day through December 31.
Start date is chosen by the taxpayer within those constraints.
Both Tests Met in the Same Year
If both the Green Card Test and the SPT are met in the same calendar year, the residency start date is the earlier of the two dates. For example, if the SPT start date would be April 1 but the green card was received June 15, the start date is April 1.
Step 02
Split the Year: Pre- and Post-Residency 거주 전·후 기간 소득 분리
Once the residency start date is established, divide the calendar year into two periods. Each period has different tax treatment.
| Period | Tax Status | Income Reportable to IRS | FBAR / FATCA |
|---|---|---|---|
| Jan 1 → Day before residency start date | Non-resident alien | U.S.-source income ONLY. Korean salary, rental, investments: NOT reportable. | Not required for this period |
| Residency start date → Dec 31 | Resident alien | WORLDWIDE income. Korean salary, rental, bank interest, stock gains, severance: ALL reportable. FTC (Form 1116) applies for Korean taxes paid. | Required if Korean accounts >$10K at any point in the full calendar year |
Example: H-1B Arrives July 1 (Residency Starts July 1)
Korean salary Jan–Jun: NOT reported to IRS(non-resident period). Korean salary Jul–Dec: reported to IRS with FTC for Korean taxes withheld. FBAR required for Korean accounts if aggregate exceeded $10,000 at ANY point in the full calendar year (including before July 1).
Korean salary Jan–Jun: NOT reported to IRS(non-resident period). Korean salary Jul–Dec: reported to IRS with FTC for Korean taxes withheld. FBAR required for Korean accounts if aggregate exceeded $10,000 at ANY point in the full calendar year (including before July 1).
Step 03
Gather Korean Income Documents 한국 소득 서류 수집
For income earned during the resident period (after the residency start date), you must report Korean income to the IRS and claim the Foreign Tax Credit using documentation of Korean taxes paid. Request these documents from Korean employers and financial institutions — ideally before leaving Korea, as obtaining them from the U.S. is more difficult.
Employment & Business Income
- 근로소득 원천징수영수증 — Korean wage and withholding certificate. Shows gross salary and Korean income tax withheld. Required for FTC on Form 1116 (general basket).
- 퇴직소득 원천징수영수증 — Severance (퇴직금) withholding certificate. Required if severance was paid.
- 사업소득 원천징수영수증 — Business income withholding certificate (if self-employed in Korea).
- Proof of Korean employment end date — Required to establish the income sourcing period for split-year allocation.
Investment & Financial Income
- 이자소득 원천징수영수증 — Bank interest withholding certificate from each Korean bank.
- 배당소득 원천징수영수증 — Dividend income withholding certificate.
- 주식 매매 내역서 — Securities transaction statements from Korean brokerage showing cost basis, proceeds, and gain/loss for each trade.
- 임대소득 내역 — Korean rental income statements; lease agreements; receipts for deductible Korean property expenses.
- Korean bank account statements — Year-end and highest-balance statements from all Korean accounts for FBAR reporting.
⚠ Korean Mutual Funds (펀드) — Action Required BEFORE U.S. Residency Starts:
Korean domestic mutual funds are typically classified as Passive Foreign Investment Companies (PFICs) under U.S. tax law. The PFIC excess distribution regime is among the most punitive in the U.S. tax code — gains and distributions taxed at the highest ordinary income rate plus compound interest charges from the year of acquisition. The only cost-free solution: liquidate all Korean mutual funds before the residency start date. Sales made while still a non-resident (before the start date) are Korean-source income — not subject to U.S. tax. Sales made after the start date create a PFIC problem that requires Form 8621 and potentially thousands of dollars in remediation.
Step 04
Apply Foreign Tax Credit (Form 1116) 외국납부세액공제 신청
When both the U.S. and Korea tax the same income — specifically Korean income earned during the resident period — the Foreign Tax Credit (Form 1116) prevents double taxation by crediting Korean taxes paid against the U.S. tax owed on the same income.
- General basket (일반 소득): Korean salary, severance, and business income. Korean income taxes withheld on these items credit against U.S. tax in the general FTC basket.
- Passive basket (수동적 소득): Korean bank interest, dividends, capital gains, and rental income. Korean taxes on these items credit in the separate passive basket. The two baskets cannot offset each other — excess credits in one basket cannot reduce tax in the other.
- FTC limitation: The credit is limited to the proportional U.S. tax on the foreign income. If Korean tax rates exceed U.S. rates on the same income (common at higher income levels), excess FTC carries back 1 year and forward 10 years.
- Korean social insurance (건강보험, 국민연금) is NOT creditable: Only income taxes paid to Korea are creditable. Korean national health insurance contributions and national pension contributions are social insurance payments — not income taxes — and cannot be claimed as FTC on Form 1116.
- Documentation required: Attach 원천징수영수증 and equivalent Korean tax documents to support the FTC claim. The IRS may request these documents during examination.
Step 05
File FBAR & FATCA 해외 금융계좌 및 자산 신고
| Form | Threshold | What to Report | Due Date | Where Filed |
|---|---|---|---|---|
| FBAR (FinCEN 114) |
Aggregate >$10,000 at any point during the year | All Korean financial accounts: checking, savings, brokerage, securities, pension (where you have financial interest or signature authority). KakaoBank, KB, Shinhan, Woori, NH, Toss, Korean brokerage accounts. | April 15; automatic extension to October 15 | FinCEN BSA E-Filing System (separate from IRS tax return) |
| FATCA (Form 8938) |
Single / MFS in U.S.: >$50K year-end or >$75K at any time. MFJ in U.S.: >$100K / $150K | Specified foreign financial assets: Korean bank accounts, Korean stocks held directly, Korean funds, Korean partnership interests, Korean pension, Korean life insurance with cash value. | Same as Form 1040 (April 15 or with extension) | Attached to Form 1040 — not separate |
FBAR Covers the Full Calendar Year — Including Pre-Residency Period:
FBAR is filed for the full calendar year in which you were a U.S. tax resident. If your residency started July 1 but your Korean accounts exceeded $10,000 at any point from January 1 through December 31, the FBAR must report those account balances. The aggregate threshold looks at the entire calendar year — not just the resident period.
Step 06
Choose Filing Status 신고 자격 선택
Dual-status taxpayers face significant restrictions on filing status that often disadvantage married couples arriving mid-year. Understanding these restrictions — and when the First-Year Election can override them — is essential.
| Situation | Available Filing Status | Standard Deduction? |
|---|---|---|
| Full-year resident (resident from Jan 1) | Single, MFJ, MFS, HOH — all available | Yes — $16,100 (single) / $32,200 (MFJ) for 2026 |
| Dual-status year (arrived mid-year, SPT met) | Single or MFS only (no MFJ, no HOH) — unless First-Year Election or §6013(h) election | NO standard deduction in dual-status year. Only itemized deductions available, and only for the resident period. |
| Dual-status year with First-Year Election (§6013(h)) | MFJ available if both spouses elect to be treated as residents for the full year | Yes — full standard deduction available ($32,200 MFJ for 2026) |
| First-Year Election (no §6013(h)) | Single (or MFS) — same as dual-status restrictions unless combined with §6013(h) | Yes for the entire year — First-Year Election makes the person a resident for the full elected period |
Step 06A
First-Year Election — Option for Late Arrivals 첫해 거주자 선택
If the SPT is not met in the arrival year but will be met in the following year, the First-Year Election under IRC §7701(b)(4) allows the person to elect U.S. resident status from a chosen date in the arrival year. This is valuable for late-year arrivals who want MFJ status and the standard deduction.
1
Requirements — All Four Must Be Met
§7701(b)(4) Conditions
- Not a U.S. tax resident in the prior calendar year
- Will be a U.S. tax resident in the following year (under SPT or Green Card Test)
- Present in the U.S. for at least 31 consecutive days in the election year
- Present in the U.S. for at least 75% of the days from the first day of that 31-consecutive-day period through December 31 (up to 5 absence days can be treated as present)
2
Combined with §6013(h) Election — Full-Year MFJ
Married Filing Jointly Benefit
The First-Year Election can be combined with the §6013(h) election (if the spouse is also a non-resident) to file Married Filing Jointly for the entire year. Benefits: MFJ standard deduction ($32,200 in 2026), full year CTC, broader bracket advantages.
Trade-off: Both spouses must treat themselves as U.S. residents for the full calendar year — including the non-resident spouse's Korean income from January 1 through the arrival date. If the Korean spouse had significant Korean income from January through the arrival month, this can increase rather than decrease total U.S. tax. Model both scenarios before electing.
3
How to Make the Election
Procedure
- Attach a signed statement to Form 1040 specifying: (a) the chosen residency start date; (b) the 31-consecutive-day period; (c) a calculation showing the 75% presence test is met
- Cannot file the Form 1040 for the election year until SPT is met in the following year — the return may need to be filed on extension (Form 4868)
- Once made, the First-Year Election cannot be revoked without IRS approval
Step 07
Select the Correct Forms 제출 서류 결정
| Your Situation | Primary Form | Attachments | Notes |
|---|---|---|---|
| Full-year resident (resident from Jan 1) | Form 1040 | Form 1116 (FTC); Schedule A/B/D/E as applicable; Form 8938 if FATCA required; FBAR (separate) | Standard deduction available. All filing statuses available. |
| Dual-status year — arrived mid-year | Form 1040 (resident period) + Form 1040-NR statement (non-resident period) | Dual-status statement attached; Form 1116; no standard deduction; Form 8843 if applicable | No MFJ. No standard deduction. Most complex first-year filing. |
| First-Year Election (no §6013(h)) | Form 1040 with election statement attached | Election statement (signed); Form 1116; standard deduction available | May need to file on extension — cannot file until SPT met in following year. |
| First-Year Election + §6013(h) MFJ Election | Form 1040 MFJ with both election statements | First-Year Election statement; §6013(h) statement; Form 1116; both spouses' Korean income included | Both spouses must consent in writing to full-year resident treatment. Both spouses' worldwide income reported. |
| Treaty non-resident claim | Form 1040-NR | Form 8833 (treaty position disclosure) | Green card + H-1B: immigration risk. Consult immigration attorney first. |
Supporting Forms Reference
| Form | Purpose | Required When |
|---|---|---|
| Form 1116 | Foreign Tax Credit — credits Korean taxes against U.S. tax on same income | Any Korean income earned during resident period with Korean taxes paid |
| FBAR (FinCEN 114) | Foreign Bank Account Report — discloses Korean financial accounts | Aggregate foreign account balance >$10,000 at any point in calendar year |
| Form 8938 | FATCA — Foreign Financial Asset Statement | Foreign financial assets above FATCA thresholds ($50K/$100K for U.S. residents) |
| Form 8843 | Statement for Exempt Individuals — claims F-1/J-1 SPT exemption | Every year during F-1/J-1 exempt period, even with no income |
| Form 8621 | PFIC Annual Information Statement — Korean mutual fund reporting | Any interest in a Passive Foreign Investment Company (Korean domestic funds) |
| Form 3520 | Foreign Gift / Trust Reporting | Gifts received from Korean persons >$100,000; foreign trust transactions |
Step 08
Filing Deadlines 신고 기한
April 15, 2027
Form 1040 (Full-Year Resident)
Federal income tax return for 2026. Also the deadline for Q1 2026 estimated taxes, IRA/HSA 2026 contributions, and FBAR (though FBAR has auto-extension).
April 15, 2027
FBAR (FinCEN 114)
Automatic extension to October 15, 2027 — no separate extension request required. Filed electronically through FinCEN BSA E-Filing System, NOT the IRS.
June 16, 2027
Form 1040 — No U.S. Employer
Non-resident aliens (and some dual-status filers) with no U.S. employer-withheld taxes get an automatic 2-month extension. No Form 4868 required.
October 15, 2027
Extended Return Deadline
With Form 4868, the return filing deadline extends to October 15. NOTE: Form 4868 extends the return deadline only — it does NOT extend estimated tax payment obligations.
October 15, 2027
FBAR Auto-Extension Deadline
Final deadline for FBAR with automatic extension. Cannot extend further. Late FBAR carries up to $10,000 non-willful penalty per violation per year.
First-Year Election
File After SPT Met in Following Year
Cannot file Form 1040 for the election year until SPT is met in 2027. File on extension (Form 4868 by April 15, 2027) to allow time for the 2027 SPT to be confirmed.
Quick Reference
Filing Scenarios at a Glance 상황별 신고 방법 요약
| Arrival Situation | Start Date | Year Type | MFJ? | Std Ded? | Key Forms |
|---|---|---|---|---|---|
| H-1B arrives July 1 (SPT met in same year) | July 1 | Dual-status | No (without election) | No | 1040 + 1040-NR statement, 1116, 8938, FBAR |
| Green card received in U.S. March 15 | March 15 | Dual-status | No (without election) | No | 1040 + 1040-NR statement, 1116 |
| Green card received in Korea, arrives June 1 | June 1 (first U.S. day) | Dual-status | No (without election) | No | 1040 + 1040-NR statement, 1116 |
| F-1 exempt years end, Jan 1 present | January 1 | Full-year resident | Yes | Yes | 1040, 1116, 8938, FBAR |
| Arrives October 1, SPT not met (First-Year Election) | Oct 1 (chosen) | Dual-status w/election | Yes (with §6013(h)) | Yes | 1040 + election statement, 1116 |
| Arrives January 1, full year present | January 1 | Full-year resident | Yes | Yes | 1040, 1116, 8938, FBAR |
Case Examples
4 Step-by-Step Case Examples 실제 사례 4개
Case 01
H-1B Arrives July 1 — Corrected Start Date Calculation
Dual-Status
A Korean engineer arrives on H-1B July 1, 2026. No prior U.S. presence. 184 days in the U.S. (July 1–December 31). Korean salary Jan–Jun: $28,000 (paid before moving). U.S. salary Jul–Dec: $65,000.
SPT + Start Date (Corrected)
| SPT formula: 184 × 1 + 0 + 0 = 184 ≥ 183 → SPT MET | Residency start date = July 1 (first U.S. day) |
| Pre-residency (Jan 1–Jun 30): Korean salary $28,000 | NOT reported to IRS |
| Post-residency (Jul 1–Dec 31): U.S. salary $65,000 | Fully taxable in U.S. |
| Korean salary after July 1 (assume $0 — returned to U.S.) | $0 |
| Korean income protected from U.S. tax (Jan–Jun) | $28,000 × 22% = $6,160 saved |
❌ Original Document Error
"Meets SPT on October 15 / Residency start date: October 15" — This is wrong. Residency start date is July 1 (first U.S. day). Korean income earned July 1 onwards must be reported — not just from October 15.Filing Checklist
✓ Form 1040 (Jul 1–Dec 31 resident period). ✓ Form 1040-NR statement for Jan 1–Jun 30. ✓ No standard deduction (dual-status). ✓ FBAR if Korean accounts exceeded $10K at any point. ✓ Form 8938 if Korean assets above $50K threshold. Case 02
Green Card Received Abroad — Start Date Is Arrival Date
Dual-Status
Green card approved March 1, 2026 while living in Korea. Arrives in U.S. June 1, 2026. Korean salary Jan–May: $22,000. No U.S. income before June 1.
Green Card Start Date — Received Abroad
| Green card approval date (while in Korea): March 1 | Does NOT start U.S. residency (person not physically present in U.S.) |
| First U.S. physical presence after receiving green card: June 1 | Residency start date: June 1, 2026 |
| Korean salary Jan–May ($22,000): non-resident period | NOT reportable to IRS |
| If residency were calculated from March 1 (incorrect): $22,000 Korean salary would be taxable in U.S. | Error would cause ≈$4,840 in unnecessary tax |
| Correct: residency from June 1 → Korean salary Jan–May protected | $0 U.S. tax on $22,000 Korean income |
❌ Original Document Error
"Green card issued March 1 → Residency begins March 1." For green cards received while ABROAD, residency starts on the first day of U.S. physical presence after receiving the card — June 1, not March 1.Filing Checklist
✓ Form 1040 (Jun 1–Dec 31). ✓ Non-resident statement (Jan 1–May 31). ✓ No standard deduction. ✓ FBAR if Korean accounts exceeded $10K at any point in 2026. ✓ FTC (Form 1116) for any Korean taxes paid on post-June income. Case 03
F-1 Exemption Ends — Full-Year Resident, Start Date January 1
Full-Year Resident
A Korean student arrived on F-1 in August 2021 (Year 1 of exemption). Exempt years 2021–2025 (5 years exhausted). Begins OPT January 1, 2026. Present in the U.S. all 365 days of 2026. No Korean income in 2026. Korean bank accounts: $38,000.
SPT — Exemption Exhausted in 2026
| 2026: All 365 days count (F-1 exemption gone) | 365 days × 1 = 365 |
| 2025: Exempt year — not counted | 0 |
| 2024: Exempt year — not counted | 0 |
| Weighted total: 365 ≥ 183. SPT MET. | Residency start date = January 1, 2026 |
| Year type | Full-year resident — NO dual-status |
❌ Original Document Error
"Meets SPT on December 5 / Residency begins December 5." This person was present ALL 365 days of 2026 — residency starts January 1 (first day of U.S. presence in the year SPT is met). December 5 would apply to someone who ARRIVED in 2026 after having some exempt years; here all days count from day one.Filing Checklist
✓ Form 1040 (full year). ✓ Standard deduction available ($16,100 single). ✓ FBAR: $38,000 Korean accounts exceeded $10K — FBAR required. ✓ FATCA Form 8938: $38,000 < $50K single threshold — not required. ✓ FICA taxes now apply to OPT wages — notify employer. Case 04
Late-Year Arrival — First-Year Election for MFJ
First-Year Election
A married Korean couple (Spouse A taking a U.S. job; Spouse B no U.S. income) arrives October 1, 2026. 92 days Oct 1–Dec 31. SPT not met in 2026 (92 < 183). SPT will be met in 2027. Spouse A's Korean salary Jan–Sep: $45,000. Spouse B had no income in 2026.
First-Year Election Eligibility Check
| Neither resident in 2025 (prior year) | ✓ Condition 1 met |
| Will be resident in 2027 (SPT will be met) | ✓ Condition 2 met |
| 31 consecutive days from Oct 1: 92 days (Oct 1–Dec 31, uninterrupted) | ✓ Condition 3 met |
| 75% presence from Oct 1 to Dec 31: 92 present / 92 available = 100% | ✓ Condition 4 met |
| First-Year Election available: elect residency from October 1 | Attach statement to Form 1040 |
§6013(h) MFJ Joint Election — Trade-Off Analysis
| MFJ election: both treated as residents Jan 1–Dec 31 | Spouse A's Korean salary Jan–Sep ($45,000) must be reported |
| MFJ standard deduction available: $32,200 | vs. $0 standard deduction in dual-status |
| U.S. tax on $45,000 Korean salary at 22% (after deduction benefit) | ≈ $9,900 before FTC |
| Korean taxes already paid on $45,000 (assume 20% effective = $9,000) | FTC reduces U.S. tax to ≈ $900 |
| Without election (dual-status, no Korean salary on return): U.S. tax on U.S. income only | But no standard deduction — itemized deductions only |
| If Spouse A had zero Korean income Jan–Sep: MFJ election is clearly beneficial (free $32,200 deduction) | Model both scenarios before deciding |
Filing — Without §6013(h)
First-Year Election only: Spouse A treated as resident from Oct 1. Dual-status: non-resident Jan 1–Sep 30 (Korean salary $45,000 not reported). Resident Oct 1–Dec 31 (U.S. income reported). Cannot file MFJ. No standard deduction. But Korean salary protected from U.S. tax.Filing — With §6013(h)
Both treated as residents Jan 1–Dec 31. Form 1040 MFJ. $32,200 standard deduction. Korean salary $45,000 reported but mostly offset by FTC ($9,000 Korean taxes paid). Net advantage depends on whether standard deduction benefit ($32,200 × 22% = $7,084) exceeds residual FTC gap ($900). Favorable here if deduction benefit > FTC gap.Common Mistakes
8 Most Common First-Year Filing Errors 첫해 신고 오류 8가지
- 1 Using the date the SPT formula reaches 183 as the residency start date instead of the first U.S. day. The residency starting date is the first day of physical presence in the U.S. during the year the SPT is met — not the calendar day the weighted formula crosses 183. An H-1B arriving July 1 who meets SPT mathematically on October 15 has a July 1 start date. Korean income from July 1 onward must be reported; this error causes either under-reporting or over-reporting of worldwide income.
- 2 Using the green card approval/issuance date as the residency start date when the card was received while abroad. For a green card received while living in Korea, the residency start date is the first day of U.S. physical presence after the card was received — not the USCIS approval date. This error can cause months of Korean income to be incorrectly included in the U.S. return.
- 3 Reporting Korean income for the entire year when residency only began mid-year. Income earned before the residency start date is not reportable to the IRS — the person was a non-resident alien during that period. Filing Form 1040 with full-year Korean salary when residency started in July incorrectly increases taxable income by six months of pre-residency Korean salary.
- 4 Holding Korean mutual funds after the residency start date without filing Form 8621. Korean mutual funds held after the residency start date are PFICs — requiring Form 8621 annually. The PFIC excess distribution regime is punitive. Liquidate all Korean funds before the residency start date; sales made while non-resident are Korean-source income with no U.S. tax exposure.
- 5 Filing Married Filing Jointly in a dual-status year without a formal election. Dual-status taxpayers cannot file MFJ without the explicit §6013(h) election signed by both spouses. Filing MFJ without this election is an error that results in IRS adjustment. The election must be made in writing and attached to the return.
- 6 Claiming the standard deduction in a dual-status year. Dual-status taxpayers cannot claim the standard deduction for any portion of the year — only itemized deductions on Schedule A for the resident period. Only the First-Year Election (or §6013(h)) allows the standard deduction in an arrival year when SPT is met mid-year.
- 7 Not filing Form 8843 during F-1/J-1 exempt years because no U.S. income exists. Form 8843 is required every year the SPT exemption is claimed — even with zero U.S. income and no Form 1040-NR required. Failure to file Form 8843 forfeits the exemption for that year, potentially triggering unexpected SPT residency for a prior year.
- 8 Not claiming the Foreign Tax Credit for Korean taxes paid on post-residency Korean income. Korean income earned after the residency start date is reportable to the IRS — and Korean taxes paid on that income are creditable via Form 1116. Taxpayers who report the Korean income but omit Form 1116 pay full tax twice on the same earnings. The FTC is the primary mechanism for preventing this double taxation and should be filed whenever Korean income is included on the return.
Hanmi CPA
Hanmi CPA Insight
Practitioner's Note
The first-year U.S. tax return is unique in the individual tax experience — it requires the taxpayer to apply two completely different sets of rules to the same calendar year, split at a single date that may not be obvious from the taxpayer's own understanding of their situation. The residency start date determination is where the most consequential errors occur. The SPT start date is the first U.S. physical presence day in the year the formula is met — not the formula date, not the visa activation date, not the day the employer begins payroll. That first day is the foundation from which everything else follows.
The First-Year Election is underutilized — particularly among married couples arriving in the fourth quarter. An October arrival who will meet SPT in the following year has an election available that provides the full MFJ standard deduction ($32,200 for 2026) and access to the standard deduction that would otherwise be unavailable in a dual-status year. The trade-off — worldwide income for the full year including the pre-arrival Korean income — is often favorable when the Korean spouse had limited Korean income before arriving. The election analysis takes 20 minutes to model; the benefit can exceed $7,000 in tax savings for a single year.
Korean mutual fund (펀드) liquidation before the residency start date is the single most impactful pre-arrival action available to most Korean nationals moving to the U.S. Sales completed while still a non-resident — the day before the first U.S. arrival — are Korean-source capital gains, not taxable in the U.S. The same sale made after the first U.S. day creates a PFIC problem that may cost thousands to resolve and that compounds with every subsequent year the fund is held. This is a two-minute action — submit the sell order before departure — with potentially years of compliance benefit.