Pension Savings vs IRP — Same Tax Credit, So Why Both?

“Should I open Pension Savings (연금저축) or IRP (Individual Retirement Pension, 개인형 퇴직연금)?” is one of the most common questions for Korean employees. The standard answer is “both” — but few people know exactly why. The moment you think “the credit rate is the same anyway, so why bother with two accounts?”, you start either losing hundreds of thousands of won in refunds every year or needlessly locking up retirement money. This guide breaks down the real differences for an employee, with numbers.

This article is for information only, not tax advice. Rates and caps are for tax year 2025 (filed in 2026) and may change with tax-law revisions. Confirm individual cases with the National Tax Service (국세청) or a tax professional.

One-line summary

• Fill Pension Savings to ₩6M first → top up IRP with ₩3M is the standard answer
• Combined ₩9M cap × 13.2~16.5% credit = up to ₩1.485M refund
• The real difference isn't the tax credit — it's eligibility, early withdrawal, investable assets, and fees

Tax credit comparison — effectively identical

First, untangle the caps. The standalone tax-credit cap for Pension Savings is ₩6M/year; the combined pension-account cap including IRP is ₩9M/year (National Tax Service — Pension account tax credit). The credit rate is 16.5% if gross salary is ₩55M or less (comprehensive income ₩45M or less), and 13.2% above that. Note: the base rate under the Income Tax Act is 15% / 12% — adding the 10% local income surtax brings the effective refund rate to 16.5% / 13.2%.

Key: IRP's solo cap is higher (₩9M), so filling only Pension Savings to ₩6M caps you at ₩990K — you need to add ₩3M to IRP for the extra ₩495K (at 16.5%). Since the credit rate is identical for both accounts, the refund is the same whether you do "Pension Savings ₩6M + IRP ₩3M" or "IRP ₩9M". The reason you're still told to fill Pension Savings first is the five differences below.

Actual refunds by contribution and income — in numbers

Real refund figures are more motivating than abstract caps. Below is the year-end refund (= tax credit) by combined Pension Savings + IRP contribution and income bracket.

Two things stand out. First, contributing beyond ₩9M does not increase the tax credit. The ₩1M over the cap is simply locked up with no credit, so if saving tax is the goal, stop exactly at ₩9M. Second, a single line at ₩55M salary creates a ₩297K gap (at the ₩9M level). If your salary sits near the boundary, the same money is credited at a different rate — so check your gross-salary bracket first.

Worked example — Kim, an employee earning ₩50M a year

Numbers land harder as a concrete scenario, so let's follow one.

• Kim: gross salary ₩50M (in the 16.5% bracket), ₩750K/month available to save
• Contributes ₩500K/month (₩6M/year) to a Pension Savings account, Jan–Dec
• With extra cash in Nov–Dec, adds ₩3M to IRP → reaches the combined ₩9M

In this case, at year-end settlement (or comprehensive income tax filing), ₩9M × 16.5% = ₩1.485M is subtracted from the determined tax. If enough was already withheld up front, the difference comes back as a refund. In other words, Kim grows ₩9M for retirement while immediately recovering ₩1.485M. As a return, that's a 16.5% "guaranteed yield" in the first year alone — no deposit or bond on the market guarantees 16.5% in a year.

By contrast, if Kim had thought "Pension Savings alone is enough" and put in only ₩6M, the refund stops at ₩990K. By not adding the ₩3M to IRP, Kim throws away ₩495K every year. That ₩495K is the real answer to "why both if the credit rate is the same" — it's not the rate, it's the cap that differs.

So why both? — 5 actual differences

If the tax credit is the same, every difference shows up after you put money in: eligibility, early withdrawal, investable assets, fees, and how you receive it. The table gives the big picture; then we dig in item by item.

1. Eligibility

• Pension Savings: Anyone (no income or job requirement)
• IRP: Only those with income (employees, self-employed, civil servants). Homemakers / unemployed can't open one.

Homemakers can only operate Pension Savings. Only employees and the self-employed can use both to fill the combined ₩9M cap. So "open both" strictly applies only to those with income.

2. Early withdrawal

• Pension Savings: Partial withdrawal allowed freely (with a tax penalty). Withdrawing credit-eligible principal + earnings triggers 16.5% other-income tax
• IRP: No early withdrawal in principle. Only statutory exceptions allow it

IRP's withdrawal exceptions are set out in the Employee Retirement Benefit Security Act (근로자퇴직급여보장법) and are limited to: a non-homeowner buying a home in their own name, a non-homeowner's lease/jeonse deposit, 6+ months of medical care for the holder/spouse/dependents, personal rehabilitation or bankruptcy, and natural disasters (KB Kookmin Bank — reasons for early retirement-pension withdrawal). If none apply, the money is effectively locked until age 55.

→ Pension Savings is much more flexible. Any money you might possibly need in an emergency is safer in Pension Savings. Money in IRP is best treated as "gone" until retirement.

3. Investable assets

• Pension Savings: Funds, ETFs, deposits all allowed. Direct stock trading at some brokerages
• IRP: Funds, ETFs, deposits + risk-asset (stock / equity fund) cap of 70%

IRP requires a 30% safe-asset minimum, so you can't go 100% stock ETF (Mirae Asset Securities — retirement pension risk-asset limit). Pension Savings lets you go 100% equity (at brokerage accounts). Note that this 70/30 rule is currently being pushed by financial regulators toward abolition or relaxation, so the cap may rise or disappear soon — check the latest rule when you open and invest.

→ For aggressive long-term growth, Pension Savings wins. IRP's forced 30% in safe assets (deposits, bond funds) can drag long-term returns. That said, the 30% buffer also dampens volatility, so for someone in their 50s nearing retirement, IRP's forced diversification can actually help.

4. Fees

• Pension Savings (brokerage): 0% (only trade commissions)
• IRP: 0.2~0.4% annual management fee (varies by bank/broker/insurer)

Over 30 years, IRP's 0.3% fee compounds to roughly 8~9% of cumulative assets. Not trivial. → Pension Savings wins on fees too. When using IRP, pick the lowest-fee brokerage account and look out for fee-waiver promotions.

5. How you receive it

• Pension Savings: Pension from age 55 (min 5-year split). Pension income tax applies
• IRP: Pension from age 55 (min 10-year split). Pension income tax applies
• Non-pension withdrawal (early termination, etc.): Both hit with 16.5% other-income tax, taxed separately

Pension income tax falls with the recipient's age — 5.5% at 5569, 4.4% at 7079, 3.3% at 80+ (4.4% for a lifetime annuity at 5569) (National Tax Service — scope of pension income). That's far lower than regular income tax (645% progressive), so splitting it out as a pension in retirement is a major tax saver. Note IRP requires 5 more years of splitting (minimum 10) than Pension Savings.

Real-world deposit order

For Korean employees, recommended deposit order:

1. Fill Pension Savings to ₩6M (full cap) — flexibility, fees, asset freedom all favor it
2. Add ₩3M to IRP — hit the combined ₩9M cap → max tax credit
3. (If extra cash) Roll ISA into a pension account at maturity → extra ₩3M credit (separate)

To unpack step 3: if you move ISA maturity funds into IRP or Pension Savings within 60 days of the maturity date, 10% of the transferred amount (up to ₩3M) is added on top of that year's credit cap. So that year you can claim up to base ₩9M + extra ₩3M = ₩12M. If you run an ISA, lock in this rollover before processing maturity — for more on using ISA, see the ISA tax-saving guide.

This gives ₩1.485M (low income) or ₩1.188M (high income) refund + ISA-rollover extra ₩495K/₩396K.

Common mistakes — a checklist

A few mistakes repeat every year around pension accounts. Check them before hitting "deposit".

• Filling Pension Savings to ₩6M and stopping. Not adding ₩3M to IRP throws away ₩495K of refund a year — the most common mistake. Same credit rate doesn't mean same cap.
• Contributing over the ₩9M cap. The excess isn't credited and just sits locked. For tax-saving, stop exactly at ₩9M.
• Buying an insurance-based Pension Savings product. Annual commissions erode long-term returns. A brokerage Pension Savings fund/account is the standard.
• Putting emergency money into IRP. IRP can't be withdrawn early without a statutory reason. Money you might need goes in Pension Savings.
• Depositing after December 31. Only amounts deposited within the tax year count for the credit. If you lump it in at year-end, check the deadline.
• Missing the 60-day ISA rollover window. You must move ISA funds into a pension account within 60 days of maturity to get the extra ₩3M credit.
• Forgetting the "retirement money" intent. Early termination triggers 16.5% other-income tax on credited principal + earnings, wiping out the tax savings.

FAQ

Q. Pension Savings at insurer, bank, or broker? A. Brokerage (Mirae Asset, Samsung, KB) is overwhelmingly better. Insurance-based Pension Savings deducts commissions annually, killing long-term returns. Bank trust products have limited investment options. Brokerage Pension Savings fund or account with ETF purchase is the standard.

Q. Where to open IRP? A. If your company's retirement pension is at a specific bank/broker, you can open a personal IRP there. Or open IRP at a different institution regardless of company plan. Choose the lowest fees (usually brokerages).

Q. Can I put 100% US S&P 500 ETF in Pension Savings? A. Yes. Brokerage Pension Savings fund accounts can buy KODEX 미국S&P500, TIGER 미국S&P500, ACE 미국S&P500 — Korea-listed US ETFs. IRP caps risk assets at 70%, so only 70% (deregulation under discussion).

Q. Worth starting if I can't fill the ₩6M cap? A. Yes. Within the credit limit, ₩10K deposit = ₩1,650 refund (16.5%) — instant 16.5% return. No regular product guarantees 16.5% in a year. Starting with ₩100K/month = ₩16,500 annual refund. The intent must stay "retirement money" though.

Q. Company's severance went into my IRP — can I still add to it? A. Yes. Company severance in your IRP doesn't affect the cap; your personal additions still count for credit (up to ₩9M minus Pension Savings deposit). The company severance portion itself isn't credit-eligible. To understand the difference between company DC/DB plans, see the Retirement Pension DC vs DB guide.

Summary

Pension Savings and IRP share the same credit rate, but split on cap, eligibility, early withdrawal, investable assets, and fees. For employees, "Pension Savings ₩6M → IRP ₩3M" to fill the combined ₩9M and recover up to ₩1.485M is the standard answer, and money that needs flexibility is safer in Pension Savings.

Related tools

• Compound Calculator — what does a pension account grow to over 30 years?

Related reading

• Retirement Pension DC vs DB — Which to Choose — picking your company plan
• ISA Tax-Saving Guide — extra credit via pension rollover at maturity

References

• National Tax Service — Pension account tax credit cap
• National Tax Service — Scope of pension income (pension tax rates)
• KB Kookmin Bank — Reasons and methods for early retirement-pension withdrawal
• Mirae Asset Securities — Retirement pension risk-asset limit (70%)
• Statutory basis — Income Tax Act (pension account tax credit), Employee Retirement Benefit Security Act (IRP early withdrawal), Korea Law Information Center