Small-Scale Residential Land Exception Calculator | Reduce Land Value up to 80%
Enter the land's taxable value, site area, and land use type (residential, business, or rental) to estimate the reduction from Japan's small-scale residential land exception and its tax savings on the total inheritance tax owed.
For land that meets certain requirements — such as the deceased's home or business premises — Japan's inheritance tax law allows the taxable value to be reduced by up to 80% (Act on Special Measures Concerning Taxation, Article 69-4, the "Special Provision for the Taxable Value of Small-Scale Residential Land, etc."). Each land use type has its own maximum qualifying area and reduction rate, and any area beyond that limit does not receive the reduction.
Maximum Area and Reduction Rate by Land Use Type
| Land use type | Maximum qualifying area | Reduction rate |
|---|---|---|
| Specific residential land (the deceased's home) | 330 sq m | 80% |
| Specific business land (business premises) | 400 sq m | 80% |
| Rental business land (rented apartments, etc.) | 200 sq m | 50% |
Applying this provision has detailed requirements that vary by land use type, such as continuing to hold the land through the inheritance tax filing deadline (consult a tax accountant or tax office for details). This estimate covers a single plot of land only and does not account for combining multiple plots to allocate the maximum qualifying area.
Simulate From the Land Value, Site Area, and Use Type
What the small residential land relief does
This is a Japanese inheritance tax relief that substantially reduces the assessed value of land the deceased lived on or used for business, set out in Article 69-4 of the Act on Special Measures Concerning Taxation. A home site attracts an 80% reduction on up to 330 m², business land an 80% reduction on up to 400 m², and rental land a 50% reduction on up to 200 m² — each category carrying its own area cap and reduction rate.
The relief exists so that families are not forced to sell the family home or the premises of a business simply to pay the tax. The more valuable the land, the larger the effect; in urban areas the difference in tax can easily run into millions of yen. Enter the assessed value, the site area and the category of use, and this tool estimates the reduction and its effect on the total inheritance tax. Note that each category carries detailed conditions, such as continuing to hold the land until the filing deadline, and this tool does not handle apportioning the area cap across several plots. Always confirm an actual filing with a tax accountant or the tax office.
Sources used in this calculation
Statutory figures such as tax and insurance rates come from the public bodies listed below. They change when the law is revised, so please also check the primary source before relying on the result for an important decision.
- Area caps and reduction rates of the small-scale residential land exemption — National Tax Agency (国税庁) Effective from 2015-01 ／ Last checked 2026-10-11
- Japanese inheritance tax rate table and basic exemption amount — National Tax Agency (国税庁) Effective from 2015-01 ／ Last checked 2026-09-17
How to estimate the reduction
- Enter the assessed value of the land The value before the relief is applied. Use the figure derived by the roadside land price method or the multiplier method.
- Enter the site area Enter it in square metres. Any portion beyond the area cap does not receive the relief.
- Choose the category of use Select residential, business or rental. The area cap and reduction rate change accordingly.
- Review the reduction and its tax effect You see how far the assessed value falls and how much the total inheritance tax changes.
Tips for getting more out of it
- If the site area exceeds the maximum qualifying area (330 sq m for specific residential land, 400 sq m for specific business land, 200 sq m for rental business land), the portion beyond that limit does not receive the reduction.
- Specific residential land and specific business land both get an 80% reduction, but rental business land only gets a 50% reduction.
- The same plot of land can qualify under a different category and reduction rate depending on whether it's used as a home or rented out, so it can be worth considering how the land will be used before the inheritance occurs.
- This exception can be combined with the spousal tax reduction, so simulating both together gives a more realistic picture of the total tax savings.
Where this helps
Setting the direction of inheritance planning
Whether the family home qualifies changes the tax due considerably, so it is worth establishing early.
Informing a discussion about dividing the estate
Who inherits the land can determine whether the relief applies at all, and figures make that conversation concrete.
Planning how to fund the tax payment
If a substantial bill remains even after the relief, the funds need to be arranged in advance.
Organising the questions before seeing an accountant
Grasping the rough scale beforehand lets you spend limited advisory time on confirming the conditions.
Inheritance tax terms explained
- Assessed value for inheritance tax
- The value placed on land when calculating the tax, obtained by the roadside land price method in built-up areas and the multiplier method elsewhere.
- Qualifying residential land
- Land the deceased lived on. Up to 330 m² receives an 80% reduction.
- Qualifying business land
- Land on which the deceased carried on a business. Up to 400 m² receives an 80% reduction.
- Qualifying rental land
- Land that was let out. The reduction is limited to 50% on up to 200 m².
- Area cap
- The upper limit of area to which the relief may be applied. Nothing beyond it is reduced.
- Roadside land price
- The assessed value per square metre for land fronting a given road, published annually by the National Tax Agency.
Frequently Asked Questions
Side Note — Why Such a Large Reduction Is Allowed for "Small-Scale" Land
The small-scale residential land exception exists to prevent heirs from being forced to sell the family home or business premises just to pay the inheritance tax bill. If land were valued strictly at market price for tax purposes, simply owning a home in an urban area could generate a large tax bill, potentially forcing an heir who wants to keep living there to sell it to raise the cash.
To address this, land that serves as the foundation of daily life or business is given a substantial reduction in taxable value up to a set area, so heirs can keep their home or continue running the business. The 330 sq m limit for specific residential land is set at a level generous enough to cover the site of a typical detached house.
Rental business land (such as rented apartment buildings or parking lots), on the other hand, receives a lower 50% reduction rate than the other categories, reflecting its character as more of an income-producing investment asset than a foundation for daily life. This category-by-category design of reduction rates and area limits, aligned with the provision's underlying purpose, is one of the trickier points to understand in inheritance tax practice.