Japan Corporate Tax Filing: A Complete Guide for Foreign Subsidiaries
目次
1. Overview of Japan’s Corporate Tax System
Japan operates a self-assessment system for corporate taxes: companies calculate their own taxable income, file a return, and pay the resulting tax — without the tax authority issuing a bill first. This means errors in your calculation go undiscovered until a tax audit, which can occur years later.
Corporate tax in Japan is layered across national taxes (administered by the National Tax Agency / NTA) and local taxes (administered by prefectural and municipal governments). A Japanese subsidiary must file and pay separately to multiple authorities each year.
Japan’s tax year for corporations is the fiscal year defined in the company’s articles of incorporation — not necessarily the calendar year. Many foreign subsidiaries choose a December 31 fiscal year end to align with the parent company’s reporting calendar.
Companies exceeding ¥10M in taxable sales in base period
Defense Corporate Tax (防衛特別法人税)
National (NTA)
Corporate income tax amount
Companies with taxable income (introduced April 2026)
Withholding Tax (源泉徴収税)
National (NTA)
Payments to non-residents / royalties
Payer of the relevant income
Even loss-making subsidiaries pay tax. The per-capita levy component of Corporate Inhabitant Tax is fixed regardless of profit or loss. A company with capital of ¥10 million or less pays a minimum of approximately ¥70,000 per year even with zero income.
3. Tax Rates and Effective Tax Rate
■ Statutory rates (national corporate income tax)
Standard rate: 23.2% on taxable income
Reduced rate for small companies (capital ≤ ¥100M): 15% on the first ¥8 million of income
■ Effective tax rate (national + local combined)
When all national and local taxes are combined, the effective tax rate for a standard Japanese company is approximately 30–34%. The exact rate varies based on the company’s capital, size, and prefecture.
Defense Corporate Tax (from April 2026)
Rate: 4% on corporate income tax amount (after ¥5 million base exemption)
Applies to fiscal years ending on or after April 1, 2026
Raises the effective combined rate by approximately 0.9–1.0 percentage points All companies must file, even those below the exemption threshold.
4. Fiscal Year and Filing Deadlines
■ Standard deadline: within 2 months of fiscal year end
Corporate tax returns must be filed and taxes paid within 2 months of the fiscal year end. For a December 31 year-end, the deadline is February 28 of the following year.
■ Extension to 3 months (most foreign subsidiaries qualify)
Companies that hold a shareholders’ meeting more than 2 months after year-end can apply for a one-month extension, moving the deadline to 3 months after year-end. For December year-ends, this means March 31.
The filing extension does NOT extend the payment deadline. Tax must be paid by the original 2-month deadline, or interest (延滞税) accrues on the balance. In practice, companies estimate their tax liability and pay by the original deadline, then true-up when the return is filed.
■ Consumption tax deadline
The consumption tax return is also due within 2 months of year-end (extendable by 1 month separately). Quarterly or monthly filing may be required for large companies or those with significant refund positions.
5. Annual Compliance Calendar (in case of December 31 Year-End)
Period
Action
January
Complete year-end bookkeeping. File year-end withholding tax return by January 31. Submit statutory payment records (法定調書) to NTA.
Feb 28 ★
Tax payment deadline (if no extension). Corporate tax, local taxes, and consumption tax must be paid. Apply for 1-month extension if needed.
Mar 31 ★
Filing deadline (with 1-month extension). Corporate income tax return, consumption tax return, and local tax returns must be filed. English Tax Return Summary delivered to HQ.
May–Jun
Prefectural and municipal governments issue inhabitant tax payment notices. Typically due in June and November.
Aug–Sep
Interim tax prepayment (中間申告): companies whose prior-year corporate tax exceeded ¥100,000 must make a prepayment approximately 6 months into the fiscal year.
Dec 31
Fiscal year end. Close books. Prepare for year-end tax provision. Submit Tax Package to HQ if required.
★ marks deadlines with no grace period. Missing these triggers automatic late-payment interest (延滞税).
6. International Tax Issues Specific to Foreign Subsidiaries
■ Transfer Pricing
Transactions between your Japanese subsidiary and related parties (parent company, sister companies) must be conducted at arm’s length prices. Japan’s transfer pricing rules follow OECD guidelines. Since 2022, companies meeting certain thresholds must maintain a Local File documenting their intercompany pricing.
■ Withholding Tax on Payments to Non-Residents
Royalties, service fees, interest, and dividends paid from your Japanese subsidiary to an overseas parent are subject to Japanese withholding tax — typically at 20.42% under domestic law. Tax treaties often reduce this rate significantly (e.g., to 10% or even 0% in some cases). Applying the treaty rate requires filing a tax treaty relief application in advance.
■ Permanent Establishment (PE) Risk
If your parent company or a related overseas entity conducts certain activities in Japan (sales activities, signing contracts on behalf of the parent), it may be deemed to have a PE — making it liable for Japanese corporate tax on income attributable to that PE. This is a growing area of NTA scrutiny.
■ Thin Capitalization and Interest Deduction Limits
Japan has rules limiting interest deductions on loans from related foreign entities (thin capitalization: 3:1 debt-to-equity ratio) and earnings stripping rules (EBITDA-based: 20% cap on net interest deductions). High-debt structures with related-party loans need careful review.
■ Consumption Tax for Digital Services (Platform Taxation from April 2025)
Foreign digital service providers selling to Japanese consumers are subject to JCT registration and filing obligations. From April 2025, platform operators (app stores, marketplaces) may be responsible for collecting and remitting JCT on behalf of overseas sellers.
Consumption Tax Registration and Strategy
Japan’s Consumption Tax (JCT) is a 10% VAT-equivalent tax. The registration strategy should be decided at incorporation.
■ Should you register for JCT immediately?
A company with capital below ¥10 million is exempt from JCT for its first two fiscal years (subject to exceptions noted above). This exemption means the company does not collect JCT from customers — but also cannot recover JCT it pays on purchases.
For companies with large upfront capital expenditures or imports in the early stage, voluntary JCT registration may be beneficial because it allows recovery of input JCT. This election must be made before the start of the fiscal year it is intended to apply.
■ The simplified method (簡易課税) election
Small businesses (taxable sales below ¥50 million) can elect the simplified calculation method, which uses a fixed ratio rather than actual input tax. This election must be made before the end of the fiscal year preceding the year it applies. Miss it once and you wait two years.
7. Japanese Tax Audits: What to Expect
Japanese tax audits (税務調査) are conducted by NTA officers who visit the company’s office — typically for 2–5 days. Foreign subsidiaries are audited more frequently than domestic companies, with particular focus on:
Transfer pricing and intercompany transactions
Withholding tax on overseas payments (royalties, service fees)
Consumption tax on cross-border digital services
PE determination for parent company activities in Japan
Audits typically cover the most recent 3 fiscal years, and audit notices are usually given 1–2 weeks in advance. All communication with the NTA is conducted in Japanese.
Probitas’s role in a tax audit Act as your representative before the NTA (no need for your staff to be present) Translate all NTA inquiries and communicate with you in English Prepare responses and supporting documentation Explain the audit outcome and any adjustments to HQ in English
8. Common Mistakes and How to Avoid Them
Mistake
Consequence
How to Avoid
Not applying tax treaty to royalty/service fee withholding
Overpayment of withholding tax; difficult to reclaim
File treaty relief application before first payment
Missing the interim tax prepayment
Late payment penalty + interest
Calendar the August/September deadline at year-start
No Local File for transfer pricing
NTA may impose penalty rates (5–10% surcharge)
Prepare Local File if prior-year revenue ≥ ¥10B or intercompany transactions ≥ ¥5B
Treating consumption tax as cash-flow-neutral
Unexpected cash outflows; refund position not maximized
Review JCT registration status and filing frequency annually
Filing after 2-month deadline without paying
Late payment interest (延滞税) from original deadline
Estimate and pay tax by original deadline; file with extension
Missing Defense Corporate Tax filing (from April 2026)
Non-filing penalty even if no tax due
All companies must file — confirm with your tax accountant
9. Frequently Asked Questions
Q: Our fiscal year is March 31. When is our tax filing deadline?
A: May 31 (2 months after year-end), extendable to June 30 with a 1-month extension. The tax payment must be made by May 31 regardless of the extension.
Q: We pay a royalty to our US parent. Do we need to withhold Japanese tax?
A: Yes, generally. Under domestic law, the withholding rate on royalties to non-residents is 20.42%. The Japan-US tax treaty reduces this to 0% for certain royalties. You must file a treaty relief application with the NTA before making payments at the reduced rate.
Q: Our HQ needs the Tax Package by November. Can you meet that deadline?
A: Yes. We regularly work with foreign subsidiaries that have early HQ reporting deadlines. We prepare the Tax Package and English Tax Return Summary to fit your parent company’s schedule.
Q: We currently use a Big 4 firm. Can we switch to Probitas?
A: Yes, and we handle the transition process. We coordinate with your previous firm to obtain all prior-year returns, work papers, and carryforward schedules. Most transitions are completed with minimal disruption to your compliance calendar.
Q: Do we need a Japanese-resident director to file taxes?
A: No. There is no requirement for a resident director solely for tax filing purposes. However, a resident director significantly helps with other practical matters such as bank account opening. See our separate guide on this topic.
10. How Probitas Tax Corporation Can Help
Probitas Tax Corporation is an independent tax firm in Tokyo specializing in international taxation for foreign-affiliated companies. Our representative is a former Big 4 tax professional with experience across US, European, and Asian subsidiaries in Japan.
Corporate tax and consumption tax return preparation and filing
English Tax Return Summary for HQ reporting (included as standard)
Transfer pricing Local File preparation
Withholding tax treaty applications
Tax audit representation (English communication throughout)
Individual tax returns for expatriates (RSU, ESPP, stock options)
