Two Korean-American filers with the same salary can land in very different places every December. The gap isn’t loss harvesting or an IRA contribution. It comes from a spouse election, a running total of wires from Korea, and a fund sitting quietly in a Korean brokerage account. Handle those three before your year end tax check closes out, and the rest of the season goes the way it should.
This isn’t the generic list telling you to sell your losers and top off a 401(k). Those moves help anyone. None of them touch the three decisions that actually move the needle for a family with money, relatives, or investments tied to Korea.
The NRA Spouse Election Is a Year End Tax Decision, Not an April One
Say you’re a US citizen or green card holder married to a spouse with no US tax status. Every spring, you likely default to Married Filing Separately. Our guide to the NRA spouse resident election covers the mechanics: electing under IRC 6013(g) to treat your spouse as a US resident, which unlocks the full joint standard deduction.
That election isn’t really a spring decision. It’s a year end tax decision, because it hinges on your spouse’s income for the entire calendar year. Once you elect, their worldwide income — every won earned in Korea — gets folded into your joint return.
By December, you already have a rough sense of what your spouse earned this year. That’s the moment to run the math: does adding their Korean income beat staying on Married Filing Separately? If the answer is yes, start the ITIN paperwork now. Form W-7 processing takes seven to eleven weeks. Wait until February, and you’re racing the filing deadline for no reason.
Does your spouse run a business in Korea, or hold meaningful investments there? Loop in a CPA before deciding anything. The math gets complicated fast once real income is involved.
Add Up Every Wire From Korea Before Your Year End Tax Check
Parents send money throughout the year: tuition help, a wedding gift, a chunk of a house down payment. Each transfer feels small and separate. The IRS doesn’t see it that way.
Our breakdown of the Form 3520 threshold on a gift from Korean parents and the real estate version of the same rule both cover the same number: $100,000. Cross that total, from all foreign individuals combined in one calendar year, and Form 3520 becomes mandatory. Miss the filing, and penalties start at 5% per month, capped at 25% of the amount received.
Here’s the December-specific part nobody mentions. The threshold is an annual total, so November and December are when you actually know your full-year number. Add up every wire, every gift, every transfer your Korean family sent since January. Close to $100,000? Two things follow.
First, tell your tax preparer now, not in April. Second, if your parents are planning one more transfer before year-end, ask whether pushing it into January changes which tax year it counts toward. That’s a conversation worth having before the wire goes out, not after.
Your Korean Fund Has Its Own Year End Tax Clock: PFIC Timing
Own a Korean equity fund, an ETF, or a wrap account through a Korean brokerage? You may be holding a Passive Foreign Investment Company, or PFIC, without realizing it. Our full walkthrough of Korean stock and PFIC rules covers how the IRS treats these funds, and why the tax hit can run past 50% once you sell without planning ahead.
The favorable elections here, QEF and mark-to-market, generally need to be made on a timely filed return for the first year you held the fund. Miss that window, and you’re often stuck with the harsher excess-distribution regime for every later sale.
That’s exactly why the year end tax clock matters here, not just the spring filing deadline. If you’re new to a Korean fund this year, your first return — due next spring — is your one shot at a timely election. Missing it isn’t a small paperwork slip. It can lock you into decades of tougher rules.
Already past year one with no election made? A purging election, sometimes called a deemed sale election, can reset your basis going forward. Whether you sell before December 31 or wait until January can shift which tax year reports that gain. Before either move, find a CPA who handles Form 8621 and PFIC elections specifically. This is not a do-it-yourself corner of the tax code.
The One Universal Year End Tax Move Worth Doing Anyway
Not everything on a year end tax list needs a Korean angle. Maxing out your 401(k) contribution before your last paycheck of the year is worth doing regardless of visa status, spouse, or where your other money sits. Check with HR now. Some payroll systems cut off contribution changes weeks before December 31 itself, not on the date printed on the calendar.
This move takes ten minutes. It won’t fix a missed Form 3520 filing or a bad PFIC election, though. Treat it as the easy win, not the whole checklist.
Putting Your Year End Tax Deadlines on One Calendar
Three decisions, three different clocks. Here’s where each one actually lands.
| Decision | What to check before December 31 | Where it’s covered |
|---|---|---|
| NRA spouse election | Estimate your spouse’s full-year Korean income; start the ITIN process if the math favors electing | ITIN spouse filing guide |
| Form 3520 aggregation | Add up every foreign gift or transfer received since January; flag anything near $100,000 | Form 3520 gift guide |
| PFIC election timing | Confirm whether this is your first year holding a Korean fund, or whether a purging election makes sense now | Korean stock and PFIC guide |
None of these three follow the December 31 deadline the way loss harvesting does. Each one still depends on information only available by year-end: your spouse’s annual income, your family’s annual gift total, your holding period in a fund. That’s what makes them year end tax moves, even without one hard December 31 cutoff.
Questions Worth Asking
Do I have to make the NRA spouse election every year?
No. Once made, the election generally stays in place until you revoke it in writing, or it ends through divorce or death. You don’t redo this paperwork each December.
What if I’m not sure whether my Korean fund counts as a PFIC?
Ask your fund manager or a CPA who handles international tax before selling anything. Guessing wrong here is expensive. Get a firm answer, not an assumption, before you place a trade.
Does the $100,000 Form 3520 threshold include gifts from years before this one?
No. The threshold resets each calendar year on its own. Prior years don’t carry forward into this year’s total, though a missed filing from an earlier year is still a separate problem worth fixing on its own.
Quick Summary
- The NRA spouse election under IRC 6013(g) depends on your spouse’s full-year Korean income — estimate it before December, since ITIN processing takes seven to eleven weeks
- Form 3520 kicks in once foreign gifts from Korean family cross $100,000 combined in a calendar year — tally your total before year-end, not after
- PFIC elections for Korean funds are only fully available in your first year of ownership — know your timeline before you sell
- Maxing out a 401(k) before your last paycheck is the one universal move on this list, but it won’t fix any of the three above
This is general information, not a substitute for advice from a CPA or immigration attorney. Every situation is a little different, and the rules described here can change without much notice.