The joy of payday lasts about three days. Then you check the balance and think “where did it all go this month?” — without having splurged on anything.
“Split your accounts” is advice you can find anywhere. But where do the numbers come from — four accounts, fifty-thirty-twenty? This article works backwards from that question. We opened the statutes and separated what Korean law actually fixes from what is simply a widely-copied habit.
⭐⭐⭐ The short answer. In all of this, the law fixes two things — the deposit protection cap and the tax rate on interest. Neither “four accounts” nor “50 : 30 : 20” appears in any statute. That does not make them useless; it means knowing which parts you must respect and which parts you get to choose.
⭐⭐⭐ What the law fixes, and what is habit
| Item | Basis | Character |
|---|---|---|
| ⭐ Deposit protection of ₩100 million | Depositor Protection Act Enforcement Decree art. 18(7) | ⭐ A figure set in law |
| ⭐ The cap applied separately by purpose | Same paragraph, item 1(a)–(d) | ⭐ A structure set in law |
| ⭐ 14% withholding on interest | Income Tax Act art. 129(1) item 1(d) | ⭐ A rate set in law |
| ⚠️ The commonly quoted 15.4% | ⚠️ Not a figure in the statute | ⚠️ Explained as 14% plus local income tax |
| Four accounts | ⚠️ None | A widely used arrangement |
| 50 : 30 : 20 | ⚠️ None | A conventional starting point |
| Auto-transfer the day after payday | ⚠️ None | A trick for creating order |
⭐ The next two sections are the part fixed by law. Everything after that is the part you choose.
⭐⭐⭐ The cap is not ₩50 million any more — it is ₩100 million
“Fifty million protected” has been the standing figure for years. Open the Enforcement Decree and it reads differently now.
“The payment limit of insurance money under art. 32(2) of the Act shall be 100 million won.”
— Depositor Protection Act Enforcement Decree, art. 18(7), amended 11 Mar 2016; 27 Dec 2022; 17 Oct 2023; 29 Jul 2025 (translated)
⭐ The last amendment in that list is 29 July 2025. If you arranged your accounts around ₩50 million, the boundary has moved.
⭐⭐ And the law counts by purpose, not by account
Item 1 of the same paragraph matters more. Even inside a single institution, these four groups each get their own cap.
| Group | Provision | How the cap applies |
|---|---|---|
| Defined-contribution and individual retirement pensions (DC, IRP) | 1(a) | ⭐ Its own cap — and per participant |
| Pension savings accounts (plus older pension savings) | 1(b) | ⭐ Its own cap — the three combined into one |
| Insurance payouts (excluding the above) | 1(c) | ⭐ Its own cap |
| Everything else — ordinary deposits and instalment savings | 1(d) | All of it pooled into one cap |
| ⚠️ Individual Savings Account (ISA) | Item 2 | ⚠️⚠️ Combined with 1(d) — not counted separately |
⭐⭐ Three readings follow.
- ⭐ Ten accounts at one bank still sit inside 1(d) as a single pool. A spending account and a savings account at the same bank are, for protection purposes, ₩100 million between them.
- ⭐⭐ Retirement pensions, pension savings and insurance stack on top. Money with a different purpose is recognised as a different bucket by the statute itself.
- ⚠️⚠️ The ISA looks like an exception and is not one. Item 2 states that it is applied “by combining it with the claims under item 1(d).” Opening an ISA does not add a bucket.
⚠️ Easy to misread. This clause answers “how much do I get back if the institution fails,” not “how many accounts should I open.” It sits at a different level from everyday money management. It starts to bite only when a large balance piles up in one place.
⭐⭐ “15.4%” is not a number in the statute
Interest tax in Korea is almost always quoted as 15.4%. Open the Income Tax Act and that figure is absent.
“1. For interest income, the following rates …
(d) for other interest income, 14 out of 100”
— Income Tax Act, art. 129(1) item 1 (withholding rates) (translated)
⭐ What the Act fixes is 14%. The remaining 1.4 points is explained as local income tax, but ⚠️ that sits in a different statute and we did not open it to check. So this article treats 14% as the statutory figure and 15.4% as the commonly used total, and keeps them apart.
⭐⭐ One more thing in the same clause: “profits from non-business loans” are taxed at 25 out of 100. Lending money privately is taxed differently from a bank deposit. Interest received through a registered online investment-linked finance provider (P2P), however, returns to 14%.
For an after-tax maturity figure, put your numbers into the savings maturity calculator — this rate is already built in.
From here on, it is the part you choose
Money leaks for a simple reason: everything arrives in and leaves from one account. With no line between fixed costs and spendable money, “the balance” feels like “what I can spend.”
So you separate by purpose and make the money scatter automatically on payday. ⚠️ The arrangement below is convention, not law.
| Account | What it holds | One rule |
|---|---|---|
| 1. Salary | Where the paycheck lands | Nothing is ever spent from here |
| 2. Fixed costs | Rent, utilities, phone, subscriptions | Point every standing order at this one |
| 3. Living expenses | Food, transport, shopping | ⭐ Attach your debit card to this account only |
| 4. Savings and emergency | Deposits, investments, buffer | ⭐ Taken out first, not from what is left |
⭐ The count matters less than the order. Schedule the transfers for the day after payday, so the money moves before you touch it. Salary account → fixed costs, savings and buffer → whatever remains is living expenses. Saving first and spending the rest then happens by construction.
50 : 30 : 20 is the usual starting split. ⚠️ It appears in no statute and in no agency guidance. Running it for a few months and moving the numbers to fit your life is the normal outcome. To see what actually lands in the account first, try the take-home pay calculator.
⚠️ “Three to six months of expenses” is a figure we could not source
This article used to say “an emergency fund of three to six months of living expenses.” ⚠️ Checking separately, we could not find an agency source for it.
⭐ What the US Consumer Financial Protection Bureau actually publishes is a much smaller benchmark — the comparison is set out in the emergency fund article. We will not present “three to six months” as a standard here. ⭐ Figures we cannot source, we do not print.
Questions people ask
Is it fine to open this many accounts?
Yes. Instant-access accounts can be opened freely, and most banking apps let you carve one into purpose-labelled sub-accounts. ⚠️ Just remember that accounts split within the same bank are pooled under 1(d) for protection purposes.
Should I split across banks because of deposit protection?
⭐ It starts to matter once one institution holds more than ₩100 million. Below that, protection is a weak reason to split. ⚠️ Retirement and pension savings already sit in different buckets — which works much like splitting across banks.
Does a credit card break the method?
A debit card is easier for spending control. With a credit card, set the living-expenses account as the settlement account and spend only within that balance — the effect is the same.
Do more accounts earn more interest?
⚠️ The rate has nothing to do with the number of accounts. The statutory 14% attaches to interest, not to accounts. Growing the interest is a question of rate and time — see the compound interest calculator.
Sources
- ⭐⭐⭐ Enforcement Decree of the Depositor Protection Act — art. 18 (Korean statute portal, checked August 2026). Source for “the payment limit shall be 100 million won” in paragraph 7 (amended 29 Jul 2025), the separate caps under item 1(a)–(d) (with (a) applied per participant and (b) combining the pension-savings claims), and item 2's “by combining it with the claims under item 1(d)” for ISAs. ⚠️ Quotations are our translation.
- ⭐⭐ Income Tax Act — art. 129 (withholding rates) (Korean statute portal, checked August 2026). Source for item 1(d)'s “14 out of 100” and item 1(b)'s 25% on non-business loan profits with the online investment-linked finance exception at 14%.
- ⭐ Checked directly. “15.4%,” “four accounts,” “50 : 30 : 20” and “the day after payday” appear nowhere in either statute. The law-versus-habit split in this article is the result of opening the clauses ourselves.
What we could not verify
- ⚠️⚠️ The remaining 1.4 points of “15.4%.” It is explained as local income tax, but we did not open that statute to check. Only 14% is presented here as statutory.
- ⚠️⚠️ A source for “three to six months.” Not found — the sentence that used to appear here has been removed.
- ⚠️ The commencement and transitional scope of the higher cap. We confirmed the amendment date (29 July 2025) but not the supplementary provisions. ⭐ Check with the Korea Deposit Insurance Corporation before moving a large balance.
- ⚠️ Which institutions are covered. Not every financial company is an insured institution. This article covers the structure of the cap only.
- Specific banks, products or rates. Structure only — nothing here is a recommendation.
As of August 2026. The cap and its purpose-based buckets were read from art. 18 of the Depositor Protection Act Enforcement Decree, and the interest rate from art. 129 of the Income Tax Act; the account arrangement and the ratios are flagged in the text as convention with no statutory basis. ⚠️ General information — what fits depends on your own finances, and this is not a recommendation of any financial product.
