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How to Calculate Inheritance Tax on an Apartment Property and Use Deductions

Clearly explains the inheritance tax formula for apartment properties, how to assess property value, reductions for leased properties, and the key points of the basic deduction and spousal deduction, along with tax-saving measures to consider before inheritance.

Last updated: About 2 min read

In condominium inheritance, the tax amount is determined by three factors: the property's assessed value, the available deductions, and the applicable tax rate. As condominium ownership continues to rise, especially in the Tokyo metropolitan area, understanding inheritance tax measures in advance has become an important part of asset succession planning.

How is inheritance tax on a condominium calculated?

A general estimate for condominium inheritance tax can be calculated as "(inheritance tax valuation - deductions) x tax rate". The inheritance tax valuation is calculated based on the National Tax Agency's Basic Property Valuation Directives, so it differs from market price. Because the tax rate rises as the valuation increases, running a prior simulation is essential.

How is the valuation calculated?

Even if you own only one condominium unit, the basic valuation is the combined total of the building's exclusive-use portion + your ownership share of the land.

  • Land (with a road value): road value ÷ ㎡ x total condominium area x ownership share ratio
  • Land (without a road value): fixed asset tax valuation x tax rate in the property valuation standards x ownership share ratio
  • Building: fixed asset taxable base amount (roughly 70% of the purchase price is a common benchmark)

The ownership share ratio is based on the exclusive floor area and can be confirmed through the property registry certificate.

A rented condominium has a lower valuation

If the condominium you own is rented out, leased-land and rental-building valuation rules apply, which can reduce the tax burden.

  • Land: owner-occupied land valuation x (1 - land leasehold ratio x tenancy ratio)
  • Building: building valuation x (1 - tenancy ratio)

Because it is valued lower than an owner-occupied property, rental management can also be effective as part of inheritance planning.

Two major deductions available for condominium inheritance tax

Inheritance tax can often be reduced substantially by using the basic deduction and the spouse deduction. Both deductions can also be used together with other deductions.

Basic deduction: changes based on the number of heirs

Basic deduction = JPY 30 million + (number of heirs x JPY 6 million)

  • 1 heir: JPY 36 million
  • 2 heirs: JPY 42 million
  • 3 heirs: JPY 48 million

If the inheritance valuation is below the basic deduction amount, no tax is imposed.

Spouse deduction: up to JPY 160 million

If a spouse inherits the property, a deduction is available up to "JPY 160 million" or "the amount equivalent to the spouse's statutory inheritance share, whichever is greater". If the inheritance tax valuation is JPY 160 million or less, inheritance tax on the spouse may often be zero.

For owners who hold rental condominiums as real estate investments, the combination of inheritance tax valuation reductions and deductions is one effective exit strategy. For more detail, please also refer to this comprehensive guide to real estate investment skills.

Frequently Asked Questions (FAQ)

Q1. Is the inheritance tax valuation of a condominium the same as its market price?

No. Because it is calculated based on the National Tax Agency's Basic Property Valuation Directives, it is generally lower than the market price.

Q2. Does a rented condominium reduce inheritance tax?

Yes. Under leased-land and rental-building valuation rules, the assessed value is lower than for an owner-occupied property. You should confirm the land leasehold ratio and tenancy ratio.

Q3. Can the basic deduction and spouse deduction be used at the same time?

Yes. The two deductions can be used together. After applying the spouse deduction, the remaining amount can be offset with the basic deduction.

Q4. Can I calculate inheritance tax on my own?

If you know the road value and the fixed asset taxable base amount, you can produce a rough estimate. However, for an accurate tax figure, consulting a tax accountant is recommended.

Q5. What is the filing deadline for inheritance tax?

It is within 10 months from the day after you learned of the decedent's death. If you miss the deadline, additional tax and delinquency tax will be charged.

Daisuke Inazawa, President & CEO of INA&Associates Inc.

Author

President & CEOINA&Associates Inc.

President & CEO of INA&Associates Inc. Leads real estate brokerage, rental leasing, and property management across Greater Tokyo and the Kansai region. Specialises in income-property investment strategy and advisory for ultra-high-net-worth individuals.

Daisuke Inazawa is the President and CEO of INA&Associates Inc., a Japanese real estate firm headquartered in Osaka with a Tokyo branch. He leads the company's three core businesses — real estate sales brokerage, rental leasing, and property management — across the Greater Tokyo Area and the Kansai region.

His areas of expertise include investment strategy for income-generating real estate, profitability optimisation of rental operations, real estate advisory for ultra-high-net-worth individuals (UHNWIs) and institutional investors, and cross-border real estate investment. He provides data-driven, long-horizon advisory to investors in Japan and overseas.

Under the management philosophy "a company's most important asset is its people," he positions INA&Associates as a "people-investment company" and is committed to sustainable corporate-value creation through talent development. He also writes and speaks publicly on leadership and organisational culture in times of change.

He has passed eleven Japanese professional qualification examinations: Licensed Real Estate Broker (Takken), Certified Real Estate Consulting Master, Licensed Condominium Manager, Licensed Building Management Supervisor, Certified Rental Housing Management Professional, Gyōseishoshi Lawyer (administrative scrivener), Certified Personal Information Protection Officer, Class-A Fire Prevention Manager, Certified Auctioned Real Estate Specialist, Certified Condominium Maintenance Engineer, and Licensed Moneylending Operations Supervisor.

  • Licensed Real Estate Broker (Takken)
  • Certified Real Estate Consulting Master
  • Licensed Condominium Manager
  • Licensed Building Management Supervisor
  • Certified Rental Housing Management Professional
  • Gyōseishoshi Lawyer (Administrative Scrivener)
  • Certified Personal Information Protection Officer
  • Class-A Fire Prevention Manager
  • Certified Auctioned Real Estate Specialist
  • Certified Condominium Maintenance Engineer
  • Licensed Moneylending Operations Supervisor