Pension Savings Fund vs IRP — How to Use Tax Credits to Secure Your “13th-Month Paycheck”

When year-end tax settlement season arrives, some people have to pay more while others receive refunds. One of the most reliable tools that makes the difference is the pension savings fund and IRP. In both cases, you put money away for your future self, and the government immediately reduces your tax bill, which is why they are often called a “13th-month paycheck.” However, the names sound similar and the limits overlap, so it is easy to get confused. Today, we will break down the differences between the two products and the tax credit calculation using numbers. (This is for reference only and is not investment advice.)

Both Are Built Around a “Tax Credit” — Different From an Income Deduction

It is easier to understand if you separate the concepts first. Pension savings and IRP provide a “tax credit,” not an “income deduction.” An income deduction lowers the taxable income base used to calculate tax, while a tax credit is subtracted directly from the tax already calculated. The latter feels much more powerful in practice. In other words, the structure lets you receive back from your tax bill the amount of “money you contributed × credit rate.”

Credit Rate: 13.2% or 16.5%, Depending on Your Salary

The credit rate has two tiers. If your total salary is 55 million won or less, or your comprehensive income is 45 million won or less, the rate is 16.5%. If it is higher, the rate is 13.2%, including local income tax. For example, if you contribute 9 million won a year up to the tax credit limit, the refund you actually feel differs by total salary bracket. In the bracket of total salary of 55 million won or less, applying 16.5% gives a maximum of 1.485 million won. In the higher bracket, applying 13.2% gives a maximum of about 1.188 million won. Even with the same contribution, the refund can differ by nearly 300,000 won depending on income.

Contribution Limit: The Combined 9 Million Won Is the Magic Number

This is where people get confused most often. The tax credit limit is 9 million won per year when pension savings funds and IRP are combined. Within that amount, however, the standalone limit for a pension savings fund is capped at 6 million won per year. So to fill the entire 9 million won limit, it is usually best to include IRP, such as 6 million won in a pension savings fund + 3 million won in an IRP. By contrast, an IRP alone can fill the full 9 million won.

So What Is Different? — Investment Freedom vs Limit

The biggest practical difference is what you can invest in. Pension savings funds have almost no restriction on the share of risky assets, such as equity funds and ETFs, so they can be managed more aggressively. By contrast, IRP allows risky assets up to only 70% as a safeguard, and the remaining 30% must be kept in safer assets such as deposits or bond-type products. Also, some IRP accounts charge account management fees, so check before opening one.

• Pension savings fund: standalone credit limit of 6 million won, up to 100% risky assets allowed, generally no fees, open to anyone aged 18 or older
• IRP: standalone credit limit of 9 million won, risky assets up to 70%, management fees may apply, available to income-earning employees, self-employed people, and others
• Common points: tax credit rate of 13.2~16.5%, received as a pension after age 55, separate taxation of pension income tax at 3.3~5.5%
• Common points: if you close the account early, you may have to give back the tax benefits received so far through other income tax of 16.5%

Strategy for Filling 9 Million Won a Year (Example)

1. If you prioritize investment freedom: manage ETFs and similar assets with 6 million won in a pension savings fund + fill the remaining 3 million won with an IRP
2. If you want to keep accounts simple: put 9 million won into one IRP account, while accepting the 70% risky asset limit
3. If you only have 6 million won available: put only 6 million won into a pension savings fund, which gives a 990,000 won refund assuming 16.5%
4. Amounts contributed beyond the limit of 9 million won do not qualify for the tax credit, but the tax deferral effect on investment gains remains

“Tax Deferral” Is Also a Benefit — Deferred Taxation and Low-Rate Taxation

The tax credit is not the only benefit. In a regular account, 15.4% dividend income tax is withheld every year on gains from funds and ETFs. Inside a pension account, taxation is deferred until withdrawal. Because even the tax that would have been withheld continues to compound, the compounding effect becomes larger. And when you receive it as a pension after age 55, it is separately taxed at the low pension income tax rate of 3.3~5.5%. It is a three-part structure: a reduction when you contribute, deferral while you invest, and a lower tax rate when you receive the money.

There Is Also a Route Through an ISA

With an ISA, or Individual Savings Account, if you move the funds to a pension account at maturity after the mandatory 3-year holding period, you can receive an additional tax credit. A separate credit applies to 10% of the transferred amount, up to 3 million won, leaving room for an additional refund apart from the 9 million won limit discussed above. The ISA itself also works well for tax savings because up to 2 million won of investment gains, or 4 million won for the low-income type, is tax-exempt, and any excess is separately taxed at 9.9%.

In short, if your annual salary is 55 million won or less, the 16.5% credit is very attractive, so it is advantageous to fill the limit as much as possible. If you want flexible management, use a pension savings fund. If you want to use the full limit in one account, use an IRP. In most cases, people combine the two to fill 9 million won. However, be sure to consider that the money will be locked up for a long period and that there is an early withdrawal penalty. Make your decision based on your income, cash flow, and investment preferences, and choose specific products under your own responsibility. (This article is for reference only and does not recommend buying or selling any specific product.)