Korea's proposed Productive-Finance ISA (생산적금융 ISA) exempts interest and dividend income from domestic listed stocks and domestic equity funds entirely, with no cap. That is the dividing line against the regular ISA, whose tax-free allowance stops at 2 million won (4 million for the low-income tier). The account appears in the government's 2026 tax revision bill; per Herald Business, it applies to new sign-ups from January 1, 2027, and enrollment closes on December 31, 2029.
The annual contribution cap is 20 million won and the lifetime cap is 200 million won. The minimum holding period is three years, and the account can run for up to ten. Anyone who fell under comprehensive financial income taxation in any of the three preceding tax years is excluded. Eligible assets are limited to domestic holdings — listed Korean stocks, domestic equity funds, the National Growth Fund, and business development companies (BDCs).
The two accounts, numbers first
They share the ISA label but the exemption structures differ. A regular ISA shields only the first 2 million won of net profit at maturity (4 million for the low-income tier); anything above that is taxed at a flat 9.9%. That is the current rule as published by KB Kookmin Bank, and it sits 5.5 percentage points below the standard 15.4% withholding rate on financial income. The Productive-Finance ISA removes the cap altogether.
| Item | Regular ISA (current) | Productive-Finance ISA (proposed) |
|---|---|---|
| Tax-free allowance | 2M won (4M, low-income tier) | All interest and dividend income |
| Above the allowance | 9.9% separate taxation | Not applicable |
| Annual contribution cap | 20M won | 20M won |
| Lifetime cap | 100M won | 200M won |
| Minimum holding period | 3 years | 3 years |
| Maximum term | 5 years (newly proposed) | 10 years |
| Eligible assets | Deposits, funds, ETFs, domestic listed stocks | Domestic stocks, domestic equity funds, National Growth Fund, BDCs |
| Comprehensive-tax filers | Not eligible | Excluded if filed in any of past 3 years |
| Enrollment deadline | End of 2029 | December 31, 2029 |
Savers aged 15 to 34 with gross salary of 75 million won or less get a separate sweetener: an income deduction worth 10% of contributions, capped at 850,000 won. Newspim reports that the same bill also applies a reduced 9% separate tax rate to BDC dividend income.
What happens to the tax on 15 million won of dividends
The choice only resolves once you plug in your own dividend and interest volume. The table below assumes dividends from domestic stocks only, no losses, measured as net profit at the three-year maturity point. A regular brokerage account withholds 15.4% each time a dividend lands; an ISA nets everything at maturity and taxes only the excess over the allowance at 9.9%.
| Dividends over 3 years (won) | Regular brokerage (won) | Regular ISA, standard (won) | Regular ISA, low-income (won) | Productive-Finance ISA (won) |
|---|---|---|---|---|
| 6M (2M/yr) | 924,000 | 396,000 | 198,000 | 0 |
| 15M (5M/yr) | 2,310,000 | 1,287,000 | 1,089,000 | 0 |
| 30M (10M/yr) | 4,620,000 | 2,772,000 | 2,574,000 | 0 |
The arithmetic is plain. On 15 million won of cumulative dividends, a brokerage account pays 15,000,000 × 15.4% = 2,310,000 won. The standard ISA subtracts the 2 million allowance and applies 9.9% to the remaining 13 million, giving 1,287,000 won; the low-income tier subtracts 4 million and taxes 11 million, giving 1,089,000 won. The Productive-Finance ISA pays nothing. On identical dividends, the spread reaches 2.31 million won.
The catch is that this saving comes only from dividends and interest. Capital gains on domestic listed stocks are already untaxed for individual investors who are not major shareholders, in any account type. Money that only chases price appreciation in Korean equities has almost nothing to gain by moving. The longer you intend to hold high-dividend stocks or dividend ETFs, the more the last column matters. Note that this is a different regime from the separate dividend taxation scheme keyed to a 40% payout ratio, so the two must be calculated independently.
Capital gains on Korean listed shares are already tax-free in any account. What the Productive-Finance ISA actually removes is the 15.4% that lands on dividends and interest.
A 200 million won cap is not 200 million won of benefit
The lifetime figure is simply 20 million won a year multiplied by the ten-year maximum term. It does not mean you can push 200 million won in during year one. The bill also scraps the carry-forward of unused annual allowance. Contribute only 5 million won in year two and the remaining 15 million evaporates — year three does not become a 35 million won year.
Under that structure, using the full cap requires contributing 20 million won every year for a decade, roughly 1.67 million won a month. If your surplus cash falls short of that, your real ceiling is not 200 million won but annual capacity multiplied by years held. That number is worth calculating before picking an account.
Eligibility is the other thing to check up front. Falling under comprehensive financial income taxation in any of the three preceding years blocks enrollment outright. Reviewing the 20-million-won threshold at which interest and dividends move into comprehensive taxation is the right first step.
What opening a regular ISA now actually means
The bill touches the regular ISA too. The three-year minimum holding period stays, but a new five-year ceiling on total contract length appears. An account that could previously be rolled over indefinitely would instead be wound up every five years. Carry-forward disappears, and new enrollment closes at the end of 2029. Allowances and eligibility rules stay as they are.
All of this assumes the bill passes as drafted. Tax revision bills routinely have caps, effective dates, and transitional clauses reworked during National Assembly review. Whether the five-year limit reaches back to accounts opened before the effective date is precisely the kind of question that gets settled in a transitional clause. The tax table above holds only if the 2-million and 4-million allowances, the 9.9% rate, and the full exemption all survive intact. Change any one and the numbers need reworking.
What to watch
- The tax subcommittee's handling of the Restriction of Special Taxation Act — whether the full exemption clause survives as drafted
- The transitional clause on the five-year contract limit — new accounts only, or existing ones too
- Your own financial income for the past three tax years — check the withholding statements on Hometax for any year above 20 million won
- Realistic annual contribution capacity against the 20-million-won cap, given that unused allowance would no longer carry forward
- The dividend yield of your holdings — a capital-gains-driven portfolio gains little from switching
- Whether National Growth Fund and BDC products actually launch, and at what fee levels
Sources
- Productive-Finance ISA with domestic-investment-only exemption; regular ISA capped at five years [2026 tax bill] — Herald Business
- [2026 tax reform] Productive-Finance ISA created; interest and dividends fully exempt for domestic investment — Newspim
- ISA tax benefits — allowances and savings (KB Kookmin Bank)