Home › Guides

Japan: qualified invoices and date-sensitive input-tax credits

A payable can be commercially valid without supporting the input-tax treatment the buyer expects. Japan's qualified-invoice controls therefore need supplier-registration evidence, suitable documents, ledger information and date-sensitive calculation rules. The October 2026 change makes an old percentage copied from an English introduction particularly risky.

Use the Japan input-tax control worksheet to keep the document, registration check, rule edition and calculation together. This guide's purchase examples illustrate controls under explicit assumptions; they do not replace the buyer's approved consumption-tax method.

Confirm the buyer's method and document requirements

NTA's qualified-invoice overview states that the system generally requires retaining prescribed books and qualifying invoices or equivalent evidence for input-tax deduction, subject to exceptions. Only registered qualified-invoice issuers can issue qualified invoices. A tax-looking amount on an ordinary commercial bill is not, by itself, proof of that status. NTA: qualified-invoice system, code 6498.

Tax should first establish the buyer's applicable method and exceptions. A simplified or special calculation regime can change the relevance of purchase-by-purchase calculations. Do not configure the following worked arithmetic for every Japanese entity merely because it has AP invoices.

For purchases using the ordinary document-based process, define the required invoice and ledger checks with the tax reviewer. Preserve the applicable supplier identity, transaction date, description, amount, rate/tax information and any required recipient information. Distinguish documentary defects from commercial disputes so that AP requests the right remedy.

Check registration at the relevant time

NTA's public issuer system supports checks based on registration number and explains that the purpose is to verify its validity at the transaction time. A current master-data flag is not a substitute for the relevant historical evidence. NTA: registration-search purpose.

Record the number provided by the supplier, legal identity match, relevant date, result and check timestamp. Preserve changes as dated history. If procurement receives notice of cancellation or new registration, route it to tax and AP before changing prospective treatment.

Do not reuse another supplier's number or assume a group parent's registration covers every contracting entity. If identity remains uncertain, keep the payable visible and separate the commercial payment decision from the unapproved tax-credit claim.

Use the revised 2026 transition

NTA's current 2026 reform material replaces the former post-September-2026 path with 70% for 1 October 2026–30 September 2028, 50% for 1 October 2028–30 September 2030, and 30% for 1 October 2030–30 September 2031, where the transitional conditions apply to purchases from nonregistered issuers. Do not implement the older English shorthand of 50% from October 2026. NTA: 2026 reform, 7/5/3 deduction section.

NTA Q&A 113 also distinguishes the supplier ceiling by tax-period start: the prior JPY 1 billion ceiling applies to the specified earlier-starting periods, while JPY 100 million applies to periods beginning on or after 1 October 2026. It describes the extra ledger identification and retained evidence required for the transition. The reduced percentage and the ceiling therefore need different date inputs. NTA: Q&A 113, revised April 2026.

Create a rule record with source, effective transaction dates, tax-period conditions, supplier aggregation basis and approval. Keep historic rules available for corrections and audits. A rate-table update that rewrites every old payable loses the evidence for the original claim.

Work through the percentage change

Assume Nihon Example applies the ordinary method, and tax confirms that a particular nonregistered supplier purchase meets all transition conditions. The purchase is JPY 110,000 gross, consisting for this simple test of JPY 100,000 consideration and JPY 10,000 consumption-tax equivalent at an illustrative 10% rate. There are no mixed rates, special exceptions, rounding differences or supplier-ceiling constraints.

For an eligible 30 September 2026 purchase, the test's prior-stage deduction is JPY 8,000 at 80%, leaving JPY 2,000 not deducted under that calculation. For an otherwise identical 1 October 2026 purchase, the revised 70% stage produces JPY 7,000, leaving JPY 3,000. The latter must not use the obsolete JPY 5,000 expectation.

The gross payable remains JPY 110,000 in both cases. Changing the deductible portion changes the buyer's accounting/tax allocation, not the supplier's agreed amount. The posting design must balance using the tax team's approved treatment of the non-deductible amount, rather than reducing payment to the supplier automatically.

Retain the original purchase date, registration evidence, tax-period context and rule identifier with each calculation. If the invoice arrives late, use the legally relevant transaction and period analysis; do not apply the newest percentage solely because the AP operator entered it in October.

Test the supplier ceiling separately

Now assume a tax period beginning 1 October 2026, one nonregistered supplier and prior eligible gross purchases of JPY 99.8 million in the relevant aggregation. An additional eligible purchase is JPY 1.1 million gross, with JPY 100,000 illustrative tax equivalent. Assume uniform 10% treatment and that the ceiling calculation allocates this purchase proportionately as approved by tax.

Only JPY 0.2 million of the new gross amount remains within the JPY 100 million ceiling; JPY 0.9 million exceeds it. The tax equivalent within the ceiling is approximately JPY 18,181.82, and 70% is approximately JPY 12,727.27. These decimals are explanatory test arithmetic; the production result must use the approved statutory calculation and rounding method.

This scenario should trigger a ceiling exception and review, not an automatic 70% deduction of the full JPY 100,000. A separate period beginning before 1 October needs its own ceiling rule. The invoice's October date alone does not determine that period's ceiling.

Correct documents without losing the decision history

If supplier evidence changes, determine whether it affects the original transaction date before adjusting the claim. A new registration effective later does not justify marking every historic bill as qualified. Keep the prior check and the reason for any revised conclusion.

For a returned item or approved price reduction, link the adjustment to its original purchase and tax calculation. Test whether the relevant transition, supplier aggregation and accounting period update correctly. Do not reclassify an old transaction using today's rule simply because the correction entered the system later.

Where a document is incomplete, AP should request the appropriate correction from the supplier and retain both versions. Tax decides whether an exception or alternative evidence applies. A manual override needs approval, a reason and an audit trail, rather than a permanent "deduct anyway" checkbox.

Assign owners and accept the calculation

Procurement owns supplier legal identity and communications. AP owns document capture and original/adjustment relationships. Tax owns method, eligibility, date rules, ceilings and rounding. Integration owns effective dating and reproducibility. The controller approves the reconciliation between payables, deductible amounts, non-deductible treatment and supporting evidence.

Review a population by supplier and rule stage, not just by invoice total. Flag missing registration evidence, unapproved overrides, threshold approaches and amounts excluded by the ceiling. The control should reproduce a posted calculation from the archived facts without querying today's master data as though it were historic truth.

• ☐ The buyer's calculation method and exceptions are approved.
• ☐ Supplier registration is evidenced for the relevant transaction time.
• ☐ Required invoice and ledger information is retained.
• ☐ The revised 70/50/30 stages are effective-dated correctly.
• ☐ Supplier ceilings use tax-period-start conditions and complete aggregation.
• ☐ Late invoices, returns and registration changes preserve historic decisions.
• ☐ Rounding and non-deductible accounting treatment are approved.
• ☐ The controller can reproduce both ordinary and ceiling test results.

Use master-data readiness for supplier history and change management for effective-dated configuration.

Worksheet: Japan input-tax transition worksheet

Copy this worksheet for each case. It records decisions and evidence; it does not determine the tax or legal treatment.

Sources checked: 17 October 2026 against current Japanese NTA material. The worked ceiling allocation is explicitly illustrative and requires local tax approval before production use. It does not calculate a complete consumption-tax return.

Related on this site

• Country pages: key facts with sources
• E-invoicing matrix: country × ERP support
• All guides

Vendor documentation is cited only as an example of the level of evidence to ask for; it is not a recommendation or a ranking. This guide is general information, not tax or legal advice. Checked 2026-10-17.

Related: Glossary – abbreviations and terms used in these guides (SAF-T, Peppol, CTC, EN 16931, IFRS and more).

Page last updated: 2026-10-17 · Markdown version