Can Foreigners Use Japan's Mortgage Tax Credit? The 2026 Reform and Non-Resident Rules
Japan's fiscal 2026 tax reform outline confirmed that the deadline for the mortgage tax credit (the special income tax credit for those with a home loan) will be extended five years, from the end of 2025 to the end of 2030. Alongside that, the income tax-free threshold — the so-called '¥1.78 million wall' — is also set to rise to ¥1.78 million in 2026. We regularly hear from overseas readers and non-Japanese buyers considering a home purchase in Japan asking whether this credit applies to them.
The short answer: the credit isn't restricted by nationality, but whether you count as a 'resident' for tax purposes is the first thing that determines eligibility. Here's a walkthrough of the basics, what changed in the fiscal 2026 reform, and what non-residents in particular need to watch for.
What exactly is the mortgage tax credit?
If you build, buy, or renovate a home using a mortgage, a set percentage of your year-end loan balance can be deducted directly from your income tax owed. Any amount that can't be used against income tax is generally understood to carry over partially to the following year's resident tax.
Because it's a credit deducted from the tax amount itself rather than from taxable income, it tends to produce a larger tax-saving effect than an ordinary deduction.
Does it apply to foreign nationals — both residents and non-residents?
Nationality itself isn't a requirement under the system. What matters is whether you qualify as a 'resident' under Japan's Income Tax Act — generally determined by whether you have your base of living (domicile) in Japan, or have maintained a residence there for one year or more. If you're based in Japan under a work visa or business manager visa, with your base of living and residency registration (juminhyo) here, you can generally qualify as a resident for this credit.
On the other hand, a non-resident who keeps their base of living overseas and only purchases property in Japan is, in principle, excluded from the mortgage tax credit. Cases like a temporary posting abroad that creates non-resident status for a period are handled on a case-by-case basis, so checking with a tax accountant in advance matters in practice.
What changed in the fiscal 2026 reform?
The core change is the five-year extension of the application deadline, from the end of 2025 to the end of 2030. Alongside that, a new 'GX-oriented housing' category — requiring an insulation rating of grade 6 or higher plus renewable energy equipment — is expected to be newly available to all households, not just households with children.
Key figures from the fiscal 2026 reform
- New application deadline
- 2030year-end
- The 'income wall' threshold
- 1.78million yen
- Typical credit rate
- 0.7%
- Typical credit period (new-build)
- 13years
Extended five years from the previous end of 2025
¥0.99M basic deduction + ¥0.79M employment income deduction
Applied to the year-end loan balance, as commonly cited
Varies by home type and acquisition timing
What are the main requirements to qualify?
Requirements commonly checked in practice include a minimum floor area, moving in within a set period after acquisition, and total income staying under a set threshold. For pre-owned homes, there are reportedly separate requirements around building age and earthquake-resistance performance.
Legal basis
- Act on Special Measures Concerning Taxation, Article 41 (Special income tax credit for those with a home loan)
- This is generally cited as the basis for the system that lets you deduct a set amount from income tax based on the year-end balance of a loan used to build, buy, or renovate a home.
- Income Tax Act, Article 2, Paragraph 1, Item 3 (definition of 'resident')
- This defines a 'resident' as an individual who has a domicile in Japan, or who has maintained a residence there continuously for one year or more — the starting point for determining eligibility for the mortgage tax credit.
What documents are needed for the tax filing?
In the first year, a tax return is generally required, typically accompanied by the year-end loan balance certificate related to the home acquisition loan, a certificate of registered matters, and a copy of the sales contract. For salaried employees, from the second year onward it can often be handled through the year-end adjustment process instead.
How treatment generally differs by residency status
| Category | Mortgage tax credit eligibility | Notes |
|---|---|---|
| Resident with a base of living in Japan and residency registration | Can qualify | Must separately meet income and floor-area requirements |
| Non-resident who keeps their base of living overseas | Excluded in principle | Treatment can vary based on individual circumstances |
| Temporarily non-resident, e.g. due to an overseas posting | Case-by-case | Advance confirmation with a tax accountant is recommended |
Common missteps and how to avoid them
✕Bought property while still living overseas, assuming the mortgage tax credit would automatically apply.
→Before signing, sort out your resident/non-resident status and when you plan to move your base of living to Japan, and confirm with a tax accountant.
✕Lost the year-end loan balance certificate and missed the deadline for the first year's tax return.
→Keep certificates from your lender in a dedicated folder, and work backward from the filing deadline (generally March 15 of the following year).
✕Misunderstood the GX-oriented housing requirements and hadn't prepared documentation for the insulation rating.
→Before signing, get written confirmation from the builder on which category the home's performance rating falls under after the reform.
✕Signed without checking floor area or income requirements, only to find out later the property didn't qualify.
→At the important-matters explanation stage, cross-check the floor area and expected total income with a tax accountant.
Checklist for confirming mortgage tax credit eligibility
- Confirmed whether I count as a resident or non-resident under Japan's Income Tax Act
- Worked out when, or whether, I plan to transfer my residency registration to Japan
- Checked basic requirements like floor area and total income
- Confirmed which category applies — standard new-build or GX-oriented housing
- Confirmed with the lender how to obtain the year-end loan balance certificate
- Prepared the document list needed for the first year's tax return
- Consulted a tax accountant or other specialist about how any non-resident period would be treated
Frequently asked questions
- Q. Can non-Japanese nationals use the mortgage tax credit?
- A. Nationality isn't a requirement — what matters is whether you qualify as a 'resident' under Japan's Income Tax Act.
- Q. What happens if I buy property in Japan while still living abroad?
- A. A non-resident who keeps their base of living overseas is, in principle, excluded from the mortgage tax credit.
- Q. How did the deadline change under the fiscal 2026 reform?
- A. The deadline, previously the end of 2025, is expected to be extended five years to the end of 2030.
- Q. What is 'GX-oriented housing'?
- A. It's a category requiring an insulation rating of grade 6 or higher plus renewable energy equipment, expected to be open to all households, not just those with children.
The SUMIMOTO Hub app organizes the mortgage tax credit's requirements and necessary documents in multiple languages, and its 24-hour AI advisor can help you think through your resident/non-resident status. For an actual eligibility determination or help with filing your tax return, we'd still recommend confirming with a tax accountant or other specialist.
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