A single line — "the government deducts 40% of what you invest" — kept Korea's National Growth Fund (국민성장펀드, gukmin-seongjang-pundeu) in the news for a month. Its first sale ran May 22 to June 11 and just closed yesterday. But if you read that "40%" as "you get 40% of your money back," your tax expectation may be two or three times too high. An income deduction is not a tax credit. Let's verify the three headline perks with actual numbers and find out what really lands in your pocket.
Check your dividend tax burden in the Financial Income Tax Calculator →
TL;DR
- The National Growth Fund is a public-participation investment fund where the government absorbs part of the losses and adds tax breaks. First sale closed May 22–Jun 11
- Eligibility: age 19+ (or 15+ with earned income). Barred from the dedicated account if you were subject to comprehensive financial-income taxation in the past 3 years
- The 40% deduction is not a 40% refund. It lowers your taxable base, so your real saving = deduction amount × your marginal rate
- Invest ₩30M → ₩12M deduction → roughly ₩1.98M back at a 16.5% marginal rate, or about ₩3.17M at 26.4%
- Dividends are taxed at a flat 9.9% (separate taxation) for 5 years, and the government covers up to 20% of losses first. But there's a 3-year lock-up (early redemption claws back the tax breaks)
What the National Growth Fund actually is
Under a "productive finance" banner, the government built this public-participation fund to channel household money into Korea's domestic capital markets. What sets it apart from an ordinary fund is two things the government adds: tax benefits (an income deduction plus separate taxation on dividends) and a partial loss buffer. In exchange, your money is locked up for a set period.
The key numbers first:
- Sale window: first round May 22–June 11 (3 weeks)
- Contribution cap: dedicated account ₩100M/year (₩200M over 5 years); general account ₩30M/year
- Lock-up: 3 years. Redeem within 3 years and the tax breaks you received are clawed back
- Eligibility limit: barred from the dedicated account if you triggered comprehensive financial-income taxation at any point in the past 3 years
Think of it as a deal: you lock up cash, and the government repays you in taxes and a loss cushion. So the real question is how much that repayment is actually worth.
The 40% deduction trap — it's not a 40% refund
This is where most people get it wrong. The deduction rate is tiered by your annual contribution (the amount invested).
| Annual investment band | Deduction rate |
|---|---|
| Up to ₩30M | 40% |
| ₩30M–₩50M | 20% |
| ₩50M–₩70M | 10% |
Max out at ₩70M and the deduction is 30M×40% + 20M×20% + 20M×10% = ₩18M, i.e. a maximum deduction of ₩18M.
But don't stop there. A deduction is not a "tax credit" that cuts your tax by that amount — it shrinks your taxable base (the income your tax is calculated on). So the tax you actually save is:
Real saving = deduction amount × your marginal rate
Say you invest ₩30M and get a ₩12M deduction. The same ₩12M deduction returns wildly different cash depending on your bracket (marginal rates shown include the 10% local income surtax).
| Your marginal rate (incl. local tax) | Saving on a ₩12M deduction |
|---|---|
| 6.6% | about ₩790K |
| 16.5% | about ₩1.98M |
| 26.4% | about ₩3.17M |
| 38.5% | about ₩4.62M |
| 46.2% | about ₩5.54M |
Same fund, same money — yet the higher your bracket, the bigger the refund. Conversely, if you're early-career or in a low bracket, that "40% deduction" can translate into a refund of only around ₩1M. The "40%" is not a refund rate; it's the slice carved out of your taxable base. You have to know your marginal rate before you can see what this fund is worth to you.
9.9% separate taxation — better the wealthier you are
The second perk: dividends from the fund are taxed at a flat 9.9% (income tax 9% + local surtax 0.9%) under separate taxation (분리과세), for 5 years after you join.
Why does this matter? Normally, once your annual financial income (interest + dividends) tops ₩20M, the excess is bundled with your other income and hit by progressive comprehensive taxation of 6–45%. For high earners, dividends stack on top of salary and the rate jumps. The National Growth Fund's dividends skip that bundling and cap out at 9.9%. For a wealthy investor who'd otherwise face a 30–40% rate, that's a clear win.
If your dividends are small and never reach comprehensive taxation, though, this perk barely moves the needle. Whether your dividends cross the line — and how much separate taxation saves you if they do — is fastest to check by plugging in your own numbers.
Financial Income Tax Calculator — what happens when dividends pass ₩20M →
The 20% loss buffer — how far to trust it
The third and most eye-catching perk is loss protection. Using public funds, the government absorbs up to 20% of any fund loss first. It acts as a junior (buffer) tranche: the government soaks up the first 20% slice of losses, and anything beyond that is on you.
Two caveats, though. First, this is not principal protection. Losses beyond 20% fall entirely on the investor. Second, the fiscal money is finite — as total subscriptions grow, the cushion felt per person can shrink. Reading "the government covers up to 20%" as "20% of my loss is guaranteed" leads you to underprice the risk. The tax breaks are the draw; this is not a product to buy on the strength of loss protection.
The first sale is over — what you can do now
The first sale closed yesterday (June 11). No need to panic if you missed it.
- Watch for an additional sale. Policy-driven funds sometimes reopen subscriptions depending on demand. Check official announcements for the accurate picture.
- Calculate your marginal rate first. As the table shows, this fund's value hinges on your bracket. If you're a high earner, the next round may be worth waiting for; if you're in a low bracket, more refund-efficient shelters like an ISA or a pension-savings account may come first.
- Make sure it's money you can lock up for 3 years. The mandatory hold is 3 years, and the dedicated account is effectively a 5-year horizon. If you'll need the cash within 3 years, you risk the clawback.
The National Growth Fund is a product where the real math — your marginal rate × the deduction — matters more than the "40%" headline. Nail down that number, then judge the next opportunity.
Related tools
- Financial Income Tax Calculator — compare how much the 9.9% separate tax beats comprehensive taxation for your own dividends
- Compound Interest Calculator — ballpark what a 5-year locked sum becomes at an assumed return
This article is for information only and is not investment or tax advice. Program details, sale schedules, and eligibility may change — before subscribing, confirm the latest terms via the operator's documents and official government notices. Figures here cross-check publicly available data as of June 12, 2026.