Parking accounts vs CMAs in Korea: key differences

Compare protection, access and what your balance could earn

This guide covers Korean products; similar names in another country can mean different rules.

Scroll wide tables sideways. Keyboard: focus the table, then use the arrow keys.

A parking account holds a deposit; a CMA can invest the balance

A bank deposit is money placed with a bank under an agreement to return it. The extra money paid for keeping it there is interest; the starting money is the principal. An interest rate expresses that extra amount as a percentage of the starting money over time. In Korea, a parking account is an informal name for an accessible bank deposit used for temporary cash. Here we mean those deposits, rather than every app feature called “parking”.

A CMA, short for cash management account, is an account service. The investment-type CMA discussed here automatically uses available money to buy selected investments. The account’s payment features do not tell you what was bought or whether it can lose money. Even within Korea, read the exact type.

In the table, a return is the money earned or lost. Statutory deposit protection means protection under the law if an institution cannot pay, subject to the relevant limits. Redemption means turning an investment back into cash. These are separate questions from how easy an app is to use. Read the product’s legal description and protection notice as well as the amount it might earn.

RP, MMF, MMW and issued notes mean different things

Look beside the CMA name for what it buys. A bond is a claim under which someone promises to repay borrowed money. A fund pools many people’s money to invest. The arrangements below use different contracts, so a shared CMA label does not make them equivalent. These are basic explanations; providers offer different types and specific terms.

RP: repurchase agreements · buy with an agreed resale

You buy bonds or other securities under an agreement to sell them back at an agreed time and price. An agreed return does not remove the risk that the other party fails to honour the contract.

MMF: money market fund · buy units in a fund

Your cash buys a share of a fund that makes short-term investments. Returns depend on how those investments perform.

MMW: money market wrap · have money managed

You authorise a manager to choose short-term investments for you under a discretionary agreement. This differs from buying a share of a fund that pools many investors’ money. Check what the manager can buy, the management fee and when money is paid; hiring a manager does not guarantee your principal.

Issued-note CMA · hold the firm's own note

Here the firm issues a note, a written promise to repay money under stated terms, and your account invests in that promise. Its ability to repay matters: an agreed rate does not remove issuer credit risk.

These investment holdings can lose money and fall outside deposit protection. An issuer is the company promising to pay; issuer credit risk means the chance that company cannot pay what it owes. “Short-term” only describes a short waiting time. It does not promise full repayment.

Check deposit protection for the exact product

The legal category matters more than the account name. Some CMAs operated under merchant-banking rules fall within the insured-deposit category in Article 2(2)(d) of Korea's Depositor Protection Act (Korean). They differ from the investment-type CMAs discussed above. This is an explanation of the Korean framework, not a statement that every account labelled CMA is protected. Check the product's legal category and current protection notice.

Where protection applies, check how your other eligible balances at the same institution count towards the limit. Opening a second account should not be treated as creating a second allowance. Article 32 of Korea's Depositor Protection Act (Korean) sets out the aggregation framework, while the Financial Services Commission's Policy Briefing notice (Korean) explains changes to the system. Read the product's current notice to establish its coverage.

A 3% headline can pay less than a flat 2%

Suppose you have ₩5,000,000 for 30 days, with ₩ denoting South Korean won. Offer A pays 3% a year on the first ₩1,000,000 and 1% a year on everything above it. Offer B pays 2% a year on the whole amount. The largest advertised percentage does not yet tell us which pays more on your ₩5,000,000.

These offers are hypothetical, not live product rates or forecasts of CMA returns. Keep the balance and rates unchanged. Calculate interest only on the original balance—simple interest—using a 365-day year, and exclude tax and fees. No interest is reinvested during the 30 days.

Offer A's annual rate across the full balance is 1.4%: ₩70,000 divided by ₩5,000,000. Its prominent 3% applies to only a fifth of your money. At this balance, B earns about ₩2,466 more over 30 days.

For a different balance, repeat the calculation. Also read whether a tier applies only to the amount within that band or to the entire balance. Our example uses separate bands; a real product may not. Bonus-rate conditions and promotional end dates can change the answer again.

“Calculated daily” does not mean “paid daily”

Imagine a hypothetical account that calculates interest from each day's balance but credits it at the end of the month. Until then, interest earned but not yet paid is excluded from the balance earning further interest. That account calculates daily without compounding daily. This is an invented set of terms, not a description of a particular provider's product.

For compounding to occur, interest must become part of the balance that earns further interest. Our 30-day example deliberately leaves that out.

In a CMA, when a purchase happens, when its result is paid, and when that money is invested again can differ by provider and type. An annualised return puts a result on a one-year scale so it can be compared. It is not the percentage earned in a day. Use the actual days you will keep the money, the payment schedule and any fees when comparing with a deposit.

Work backwards from the date the money leaves

For rent or a card payment, write down the amount and due date first. Then trace the route to the payee.

In an invented example, a savings pocket has no payment facility and allows transfers only to a linked current account. That adds a step before paying the bill. Your actual account may work differently. A CMA's total balance may also differ from the amount currently available to withdraw.

Check holiday handling and automatic investment times. Also check any redemption step needed to turn the investment back into cash before relying on the account for a scheduled payment. If immediate access uses a separate credit facility, check whether you would be borrowing or withdrawing your own money. The provider's payment instructions matter more here than a small difference in advertised returns.

If you are comparing two offers, put the expected interest in won beside that transfer process. The extra ₩2,466 in our example is a concrete amount to weigh against extra conditions or a different risk. It cannot tell you which real account fits your bills until you have checked those details.

For another sense of scale, a 0.5-percentage-point annual rate difference on all ₩5,000,000 over 30 days is about ₩2,055 before tax: ₩5,000,000 × 0.005 × 30 ÷ 365. This separate calculation assumes the same balance, period and simple-interest rules on both sides, without fees or reinvestment.

Sources and assumptions

• Financial Services Commission, Kim Yong-beom, then Director-General of the Capital Markets Bureau: short-term asset-management products and policy direction, 29 October 2012 — MMW and MMF structures; text under Korea Open Government License Type 1 (attribution).
• Korea Depositor Protection Act, Article 2 — the merchant-banking insured-deposit category. This guide gives its own English explanation, not an official translation.
• Financial Services Commission / Policy Briefing: deposit-protection changes, 15 May 2025 — text under Korea Open Government License Type 1 (attribution).
• Korea Depositor Protection Act, Article 32 — institution-level calculation and aggregation.

The Financial Services Commission text has been paraphrased and explained in English; no source photographs, tables or videos are used. The 2012 protection cap, statistics and detailed regulations are not used. The account offers, payment schedule and linked-account example are original hypothetical assumptions. Calculations use a 365-day simple-interest year, exclude tax, fees, rate changes and reinvestment, and round to won for display. Read the actual product’s current protection and access terms. Source provisions checked on 24 October 2026. Editorial policy.

The linked government text is used under the conditions in the Korea Policy Briefing copyright policy.