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The Tax Benefits of Pension Savings and IRP

People who get a '13th-month paycheck' at year-end tax settlement — what exactly did they do? Pension savings and IRP refund taxes the moment you contribute and defer taxes while your money grows, so compounding is interrupted less. But if you don't know the rules, you can be hit with penalty-like taxes.

What Are Pension Savings and IRP?

Both are 'pension accounts' to which the country grants tax benefits for retirement preparation. That's why they're often referred to together.

Pension savings (precisely, a pension savings fund) is an account opened at a brokerage that invests freely in funds and ETFs. IRP (Individual Retirement Pension), by contrast, is originally a vessel for receiving severance pay, but an individual can also contribute additional money to receive a tax credit.

Remember just one core difference. Pension savings can be held up to 100% in equity-type products, but IRP is legally limited to a maximum of 70% in risk assets (stocks, equity funds, etc.). The remaining 30% or more must be filled with safe assets like deposits and bonds.

This article doesn't recommend a particular product, stock, or trading timing. It's educational material to understand the 'principles' of the tax system (tax credit and tax deferral). Rates, limits, and rules can be amended each year, so before actually enrolling or filing, confirm the latest details with the National Tax Service, your financial institution, or a tax professional.

Benefit 1 — the 'Tax Credit' Refunded in the Year You Contribute

This is the most eye-catching benefit. On the combined money you put into pension savings and IRP, up to 9,000,000 won per year, a certain percentage is deducted from the tax you paid that year (as of 2026).

The limit splits like this.

① Pension savings: a tax credit up to 6,000,000 won on its own.

② IRP: a tax credit up to 9,000,000 won combined with pension savings. For example, if you've filled 6,000,000 won of pension savings, you can add 3,000,000 won through IRP to complete 9,000,000 won.

The credit rate differs by income. If a worker's total salary is 55,000,000 won or less (comprehensive income of 45,000,000 won or less), you get back 16.5%; above that, 13.2% (including local income tax). If you fully fill 9,000,000 won in the lower-income bracket, you're refunded 9,000,000 × 16.5% = 1,485,000 won at year-end settlement.

Separately from the tax-credit limit (9,000,000 won), you can contribute up to 18,000,000 won per year to pension accounts. Money contributed beyond 9,000,000 won doesn't get that year's credit, but it's also free from the 'early-termination penalty' described later, and you can carry the credit over to the next year. The figures and brackets can be amended.

Benefit 2 — the 'Tax Deferral' That Postpones Taxes While Your Money Grows

This is the truly big benefit in long-term investing. In an ordinary account, 15.4% is withheld immediately whenever dividends, interest, or fund gains arise. But inside a pension account, this tax isn't withheld right away; it's postponed 'until you later receive it as a pension.' This is called tax deferral.

What's good about the tax not coming out right away? Even the money that would have gone out as tax keeps compounding inside the account. The 'drag' of taxes eating into compounding is reduced.

What's more, the tax rate when you later receive it as a pension is also low. If you receive it as a pension in installments after age 55, the pension income tax applies at 5.5% for ages 55–69, 4.4% for 70–79, and 3.3% for 80 and up (including local income tax). It's a structure in which you settle the postponed tax when you receive it, and at a lower rate at that.

If the pension amount you receive (private pension) exceeds 15,000,000 won per year, that year's entire pension income can become subject to comprehensive taxation combined with other income. In that case you can choose 16.5% separate taxation. In other words, remember it isn't 'unconditionally low-rate' but varies by how and how much you receive. The standards and rates can be amended.

There's No Free Lunch — the Early-Termination Trap

The bigger the benefit, the more 'conditions' attach. This account is in principle designed on the premise of receiving it as a pension after age 55. If you withdraw it as a lump sum before then (early termination / early withdrawal), you effectively pay back the tax benefits you'd received.

Specifically, a 16.5% other-income tax is levied on the contributed principal for which you received a tax credit and the operating gains that accrued in the meantime. It amounts to paying back at 16.5% what you'd gotten back at 16.5% earlier, so considering the compounding time in between, it's often a loss.

That's why the principle is to fill a pension account with 'spare funds you'll absolutely not use before age 55.' If you might need money to use soon, it's safer to use amounts for which you didn't take a tax credit (that portion can be withdrawn tax-free) or another account.

If you fall under a legally defined 'unavoidable reason' — natural disaster, death, emigration, medical care of 6 months or more, etc. — there's an exception allowing withdrawal at the lower pension income-tax rate. But an ordinary need for a lump sum doesn't fall under this.

So How Should You Understand It?

Summed up in one line, the appeal of a pension account is 'a vessel that saves taxes to increase the raw material for compounding.' As this site repeatedly shows, the final outcome of long-term investing is driven as much by fees, taxes, and time as by returns.

But this is an area where the advantages and disadvantages completely change depending on the individual's income, age, and cash plans. For someone with no income who has little tax to get back, or someone with a high chance of needing a lump sum before age 55, the benefits can be halved.

Here it's enough to understand just the principle that 'deferring and lowering taxes interrupts compounding less,' and the point that 'the benefits come with the conditions of age 55 and early termination.' For concrete tax-saving planning suited to your situation, it's right to consult a tax professional.

よくある質問

Q. Can't I just do one of pension savings or IRP? How do they differ?

The tax credit is up to 9,000,000 won per year combined. But pension savings has a standalone credit limit of 6,000,000 won and can be held up to 100% in equity-type products, while IRP limits risk assets to 70%, so at least 30% must be filled with safe assets. So many people fill pension savings first, which has greater asset-allocation freedom, and supplement the remaining 3,000,000 won with IRP. Which is advantageous depends on the individual's management style and situation.

Q. Isn't getting a tax credit just a plain gain? Are there no downsides?

You get taxes back right away, but that money is in principle tied up until you receive it as a pension after age 55. If you withdraw it as a lump sum before then, a 16.5% other-income tax is levied on the credited principal and gains, so you effectively hand back the benefit. That's why the key is to fill it only with 'spare funds you won't use before age 55.'

Q. Should I enroll in a pension account after reading this article?

This article doesn't recommend enrolling in a particular product or trading. Its purpose is to understand how the tax credit (refund in the year you contribute) and tax deferral (postponing tax while your money grows) interrupt compounding less, and why the conditions of age 55 and early termination attach. For the actual enrollment and tax-saving decision, consult a tax professional based on your own income and cash plans.