CONTENTS
- 1. Inheritance Tax | Concept

- - Taxpayer
- - Property Subject to Taxation
- 2. Inheritance Tax | Method of Calculation

- - Calculation of the Taxable Value
- - Calculation of the Tax Base
- - Calculation of the Calculated Tax
- - Calculation of the Amount Actually Payable
- 3. Inheritance Tax | Method of Payment

- - Where a Return Is Filed and Voluntary Payment Is Made
- - Where Payment Is Made Through a Determination and Notice
- - Joint and Several Payment by Co-heirs
- 4. Inheritance Tax | Deadlines and Documents

- - Payment Deadline
- - Documents to Be Submitted
- 5. Inheritance Tax | Additional Tax

- - Additional Tax for Failure to File and Under-reporting
- - Additional Tax for Delay in Payment
- 6. Inheritance Tax | Checklist

- - The Support System of an Inheritance Attorney
1. Inheritance Tax | Concept

Inheritance tax refers to a tax imposed on property transferred without consideration to family members, relatives, and others as a result of the death of a decedent (Articles 3 and 3-2 of the Inheritance Tax and Gift Tax Act).
Taxpayer
The taxpayers who are obligated to file a return and pay inheritance tax include an ‘heir,’ who inherits property by reason of succession, and a ‘testamentary donee,’ who acquires property upon the death of the donor following a will or a gift agreement.
Category | Description |
Heir | Includes statutory heirs, heirs by representation, the spouse, and others |
Testamentary donee | A person who acquires property after death by a will or a gift agreement |
Special related person | A person who has no right of inheritance under the Civil Act but acquires property by a decision of distribution |
Where the special related person or the testamentary donee is a for-profit corporation, the inheritance tax payable by the for-profit corporation is exempted.
However, if an heir or a lineal descendant is a shareholder, that heir and lineal descendant must pay tax on the amount corresponding to their equity interest.
Property Subject to Taxation
As a rule, inheritance tax is imposed on all property received by an heir, but the scope of taxation varies depending on whether the decedent was a resident.
Residency status of the decedent | Property subject to taxation |
Resident | All property, domestic and foreign |
Non-resident | Only property located within Korea |
Here, a resident means a person who has a domicile in Korea or who has had a place of residence there for 183 days or more (Article 2 of the Inheritance Tax and Gift Tax Act).
2. Inheritance Tax | Method of Calculation

Inheritance tax is not simply calculated by multiplying the inherited property by a tax rate. The tax base and the actual tax payable are determined through a complex procedure.
Calculation of the Taxable Value
To calculate inheritance tax, the taxable value must first be calculated.
To do so, public charges, funeral expenses, debts, and amounts that are non-taxable or excluded from the taxable value are deducted from the value of the decedent’s inherited property, and then property given as a prior gift and presumed inherited property are added.
: All property and rights with monetary value that the decedent held during their lifetime
(including all tangible and intangible assets with economic value)
∙ Public charges
: Taxes, public utility charges, and the like for which the decedent had a payment obligation as of the date the inheritance commences
∙ Funeral expenses
: Actual funeral costs incurred from the date of death to the date of the funeral (recognized from a minimum of 5 million won up to a maximum of 10 million won)
∙ Debts
: Deductible where proven by objective evidence such as documents issued by a financial institution or a confirmation from a creditor
∙ Property given as a prior gift
: Property given by the decedent to an heir within 10 years before the date the inheritance commences, or to a person other than an heir within 5 years
∙ Presumed inherited property
: Included in the taxable value where the use of a large withdrawal of property or of debt incurred within 1 to 2 years before death is not objectively confirmed
∙ Non-taxable property
: Property bequeathed to the State or a local government, forest land for ancestral graves, cultural heritage, and the like
∙ Exclusion from the taxable value
: Property contributed to a public-interest corporation and the like
Calculation of the Tax Base
Once the taxable value is determined, various deductions are applied to it to determine the tax base.
The tax base is the standard to which the actual tax rate is subsequently applied, so it is important to confirm every deduction item without omission.
: A basic deduction of 200 million won from the inheritance tax taxable value
(an additional deduction is possible in the case of a family-business succession or a farming succession)
∙ Spousal inheritance deduction
: A deduction applied to the amount actually inherited by the spouse
∙ Personal deduction
: Children, minors, persons aged 60 or older, persons with disabilities, and others
※ However, instead of applying the basic deduction and personal deduction by item, a lump-sum deduction of 500 million won may be chosen
∙ Financial property inheritance deduction
: A deduction on net financial assets, calculated by subtracting financial debts from the financial property among the inherited property
∙ Disaster loss deduction
: A deduction where a loss arises from a disaster (such as fire, collapse, or explosion) within 6 months after the inheritance commences
∙ Cohabiting-house inheritance deduction
: Where the decedent and the heir resided in the same house for 10 years or more and the requirement of one house per household is met
→ A 100% deduction of the house value (up to a maximum of 600 million won)
∙ Appraisal fees
: Appraisal fees for the valuation of inherited property are also subject to deduction
∙ Limit on deductions from the tax base
: The deductible amount is limited to the balance remaining after excluding bequeathed property, property renounced from inheritance, property added as a gift, and the like from the inheritance tax taxable value
Inheritance deductions may be applied only within the filing deadline, and because several deduction items may be applied together, they can have a significant effect on the actual tax burden.
In particular, the cohabiting-house inheritance deduction and the lump-sum deduction have optional requirements, so the conditions must be examined carefully.
Calculation of the Calculated Tax
Once the tax base is determined, the calculated inheritance tax is computed by applying the rate set accordingly.
Here, the tax rate is applied as a progressive rate structure according to the tax base bracket, and in certain cases a surtax for generation-skipping is added.
Tax rates by tax base
Tax base bracket | Tax rate | Progressive deduction amount |
200 million won or less | 10% | None |
500 million won or less | 20% | 10 million won |
1 billion won or less | 30% | 60 million won |
3 billion won or less | 40% | 160 million won |
Over 3 billion won | 50% | 460 million won |
(tax base × tax rate) – progressive deduction amount = calculated tax
Calculation of the Amount Actually Payable
Once the calculated inheritance tax is determined, the tax actually payable must be computed.
Formula for the actual tax payable
(calculated tax + generation-skipping surtax) – tax credits – tax under annual installment or payment in kind = voluntarily payable tax
The amount remaining after adding the generation-skipping surtax to the calculated tax, deducting the various tax credits, and then excluding the tax paid by annual installment or in kind becomes the final inheritance tax to be paid voluntarily.
Generation-skipping surtax
→ An amount equal to the proportion of the inherited property received by that grandchild multiplied by 30%
→ However, where the recipient is a minor and the inherited property exceeds 2 billion won, the surtax is increased to 40%
※ In the case of inheritance by representation, the surtax does not apply
Tax credit items
Type of tax credit | Requirements for application |
Gift tax credit | A credit where gift tax was previously paid on gifted property included in the inherited property |
Foreign tax credit | A credit where foreign inheritance tax has been paid |
Short-term re-inheritance tax credit | A credit where the decedent dies within 10 years from the date the inheritance commences and inheritance occurs again |
Reporting tax credit | A credit where a voluntary return is filed within the statutory filing deadline |
Annual installment payment and payment in kind
Where it is difficult to pay inheritance tax at one time, if certain requirements are met, the burden may be spread through installment payment, long-term payment by annual installment, or payment in kind.
: Where the inheritance tax payable exceeds 20 million won
→ An amount of one-half or less may be paid in installments for up to 5 years after security is provided
→ The tax paid per installment must exceed 10 million won
∙ Payment in kind
: Where the inheritance tax payable exceeds 20 million won and the proportion of real estate and securities among the inherited property exceeds 50%
→ The relevant real estate or shares may be paid in lieu of the tax
→ The State accepts the property paid in kind after appraisal and other procedures
3. Inheritance Tax | Method of Payment

For inheritance tax, the method and procedure of payment are as important as the calculation.
An heir may file a return and make voluntary payment directly to the tax office, and if this is not carried out, payment is made in accordance with a determination and notice issued by the tax office.
Where there are several heirs, a joint and several payment obligation applies, so care is required.
Where a Return Is Filed and Voluntary Payment Is Made
Based on the calculated inheritance tax amount, an heir must file a return with the competent tax office and make voluntary payment within 6 months from the last day of the month in which the date the inheritance commences falls.
This return must include details of the inherited property, the appraised value, deduction items, and other information, and the necessary supporting documents must be attached.
Filing deadline | Within 6 months from the last day of the month in which the date the inheritance commences falls |
Subject of filing | Inherited property, appraised value, deduction details, and others |
Method of payment | A choice among the tax office, the Bank of Korea, and a post office |
Filing form | Available on the National Tax Service website |
Where Payment Is Made Through a Determination and Notice
Where a return is not filed within the deadline, the taxpayer must receive notice of the tax amount determined by the head of the tax office through the determination and notice method and pay it, and in this case an additional tax is added.
Category | Additional tax rate |
Failure to file due to a wrongful act | 40% (60% for matters related to international transactions) |
General failure to file | 20% |
In addition, where the inheritance tax is not paid in full within the payment deadline or is only partially paid, an additional tax for failure to pay is added to the relevant amount.
(unpaid tax × number of days in delay × 0.00022)
Joint and Several Payment by Co-heirs
Where there are several heirs, each one must bear the tax in proportion to the inherited property they received.
However, if any co-heir does not pay the tax, the other heirs bear an obligation to pay jointly and severally, within the limit of what they received.
: In proportion to one’s own inherited share
∙ Joint and several liability
: Limited to the extent of what one received
∙ Exception
: Where one person pays the full amount, gift tax is not imposed on the others
4. Inheritance Tax | Deadlines and Documents

Inheritance tax must be both filed and paid within the statutory deadline. If this is not carried out within the deadline, additional tax and disadvantages may arise, so care is required.
The filing deadline varies depending on whether the decedent and the heir reside in Korea, and certain documents must also be submitted together.
Payment Deadline
Category | Filing and payment deadline |
Where the decedent is a resident | Within 6 months from the last day of the month in which the date the inheritance commences falls |
Where the decedent or all heirs are non-residents | Within 9 months from the last day of the month in which the date the inheritance commences falls |
Documents to Be Submitted
When filing, various statements and documents that can substantiate the tax base and the inheritance tax calculation must be submitted together.
The documents to be submitted are the same for both residents and non-residents, but some documents are submitted selectively only where applicable.
Mandatory documents to be submitted
2. Inheritance tax taxable value calculation statement
3. Statement of inherited property by heir and its appraisal
4. Statement of debts, public charges, funeral expenses, and inheritance deductions
5. Statement of the spousal inheritance deduction
6. Statement of property disposals and debt incurred within 1 (2) years before the inheritance commences, and an explanation of their use
Documents to be submitted where applicable
2. Other documents submitted under the Inheritance Tax and Gift Tax Act, and the like
5. Inheritance Tax | Additional Tax

Inheritance tax must be filed and paid within the statutory deadline, and if this is not carried out, financial disadvantages such as additional tax follow.
Additional tax is broadly divided into sanctions for failure to file and under-reporting, and for delay in payment.
Additional Tax for Failure to File and Under-reporting
Where inheritance tax is not filed within the deadline, or only a portion is filed, the following additional tax rates apply.
Category | Additional tax rate |
General failure to file | Tax payable × 20% |
Wrongful failure to file | Tax payable × 40% |
General under-reporting | Under-reported tax × 10% |
Wrongful under-reporting | Under-reported tax × 40% |
However, where ownership of the inherited property has not been confirmed due to litigation or the like, or where there is a simple error in applying an inheritance deduction or a difference of opinion on the appraised value of property, the under-reporting additional tax may be exempted.
Additional Tax for Delay in Payment
Even where a return was filed but the tax was not paid within the deadline or was paid insufficiently, an additional tax in the form of interest is imposed.
Category | Calculation method | Time of imposition |
Non-payment or underpayment | Unpaid tax × period unpaid × 0.00022 | From the day after the payment deadline until the date of voluntary payment |
Excess refund | Excess refunded tax × period of excess refund × 0.00022 | From the day after the refund date until the date of the tax notice |
6. Inheritance Tax | Checklist

For inheritance tax, accurately calculating “how much is taxed” and then addressing “when and where to submit and pay” in order can eliminate the risk of additional tax.
By following the step-by-step checklist below in preparation, even a complex inheritance tax procedure can be organized at a glance.
Step | Key check points |
① Identifying property and debts | Listing the inherited property → Confirming whether market value appraisal is possible |
② Determining the taxable value | ▸ Deducting public charges, funeral expenses, and debts ▸ Adding property given as a prior gift and presumed inherited property |
③ Calculating the tax base | Reviewing deduction items such as the basic, spousal, and lump-sum (500 million won) deductions |
④ Calculating the calculated tax | Applying the progressive rate and whether the generation-skipping surtax applies |
⑤ Reviewing tax credits and installment payment | ▸ Gift, foreign tax, and short-term re-inheritance credits ▸ Whether annual installment payment or payment in kind is possible |
⑥ Preparing the filing documents | Completing the mandatory forms |
⑦ Filing and paying within the deadline | Residents: 6 months Non-residents: filing and payment within 9 months |
⑧ Post-filing management | Confirming payment by co-heirs Managing additional tax and annual installment interest |
The Support System of an Inheritance Attorney
This law firm includes many attorneys with an average of 10 or more years of experience, as well as inheritance specialist attorneys and tax specialist attorneys registered with the Korean Bar Association.
A comprehensive response is possible, from the inheritance procedure to tax strategy, and through collaboration with professionals such as accountants and tax accountants, a strategy tailored to the client can be established.
If you need legal assistance relating to inheritance, you may request assistance from an inheritance attorney at any time.











