Japan JCT for Foreign SaaS: Qualified Invoice Requirements Explained

Japan's Consumption Tax (JCT) is one of the most misunderstood indirect taxes for foreign SaaS. The headline rate (10%) is simple, but the qualified invoice system that took effect in October 2023 added a layer most English-language guidance still does not cover properly. If you sell SaaS to Japanese businesses and they cannot claim input credit on your invoice, they will ask you to register — or move to a competitor who already has. This article explains the regime end-to-end.

Background: JCT and electronic services

JCT has two components combined into a single 10% rate: a 7.8% national consumption tax plus a 2.2% local consumption tax. A reduced 8% rate applies to food, newspapers, and certain essentials — SaaS is always at the standard 10%.

For foreign SaaS vendors, the key distinction is between B2C and B2B electronic services:

• B2C electronic services — supplied to individuals and non-business customers in Japan. The foreign supplier is responsible for JCT; registration and output tax apply.
• B2B electronic services — supplied to Japanese businesses. The Japanese customer self-assesses JCT under a reverse-charge-like mechanism.

When must a foreign SaaS vendor register?

Registration for JCT becomes mandatory when the foreign vendor's taxable sales in Japan two years before the current year exceed ¥10,000,000. (Japan uses a two-year lookback known as the "base period".) Below that threshold, registration is optional.

Many foreign SaaS companies register voluntarily as Qualified Invoice Issuers even below the threshold — because Japanese B2B customers need a qualified invoice to claim input credit, and without one the customer effectively bears the tax as a cost. Voluntary registration is a competitive differentiator in the Japanese B2B market.

The qualified invoice system (October 2023)

On 1 October 2023, Japan introduced the qualified invoice system (tekikaku seikyusho tou hozon houshiki) as the prerequisite for input tax credit. Under the new rules:

• Only Qualified Invoice Issuers (registered with the National Tax Agency) can issue qualified invoices.
• Each Qualified Invoice Issuer receives a registration number in the format T + 13 digits (e.g., T1234567890123). Corporations use their existing corporate number; individuals receive a newly assigned number.
• Japanese business customers can only claim input tax credit on purchases backed by a qualified invoice.

Qualified invoice content requirements

A valid qualified invoice for SaaS must include:

1. Name of the Qualified Invoice Issuer (the supplier)
2. Registration number (T + 13 digits)
3. Transaction date
4. Description of the goods or services
5. Total amount for each tax rate (10% and, if applicable, 8%)
6. Applicable tax rate(s)
7. Amount of consumption tax (calculated per rate)
8. Name of the recipient (buyer)

The invoice may be issued electronically and can be in English, though many Japanese customers prefer bilingual invoices for their internal records.

How to register as a Qualified Invoice Issuer

Foreign vendors apply through the National Tax Agency (NTA) using the Application for Qualified Invoice Issuer Registration. Key points:

• You must first register as a JCT taxpayer. A foreign entity without a Japanese fixed establishment appoints a Tax Agent (nouzei kanrinin) resident in Japan.
• The Tax Agent receives correspondence from the NTA and files returns on the vendor's behalf.
• Registration timelines run 2–3 months; prepare ahead of a launch window.
• Once registered, the T-number is published on the NTA's Qualified Invoice Issuer public registry.

B2C electronic services: what you must do

If you sell SaaS to Japanese consumers:

1. Register as a JCT taxpayer (mandatory above ¥10M lookback turnover; otherwise voluntary).
2. Charge 10% JCT on each B2C invoice.
3. File JCT returns (typically annually for foreign vendors) and remit the tax via your Tax Agent.

B2B electronic services: reverse charge mechanics

For B2B supplies, the Japanese customer self-assesses 10% JCT. You do not charge JCT on the invoice. However:

• You must label the invoice as a B2B electronic service supply subject to reverse charge.
• You should still include your T-number if you are a Qualified Invoice Issuer, because it allows the Japanese buyer to claim full input credit on the reverse-charged amount.
• The safer practice is to validate the customer's corporate status through their Japanese corporate number before applying the reverse charge.

Filing and payment

Foreign JCT registrants generally file an annual JCT return within two months of their fiscal year-end. Larger taxpayers may shift to quarterly or monthly filing. Payment is made in yen; currency conversion for foreign-currency invoices typically uses the Bank of Japan published rate on the transaction date, though alternative methods (customer's bank rate) are acceptable with consistency.

Common mistakes

1. Ignoring the T-number entirely. Even if you are not yet obligated to register, a T-number is effectively required to retain Japanese B2B accounts.
2. Mixing B2C and B2B on one invoice. Different classifications require different treatment; separate the supplies.
3. Using the wrong tax rate. SaaS is always 10%; do not confuse it with the reduced 8% for other categories.
4. Skipping the Tax Agent. The NTA will not process a foreign registration without one.
5. Printing the T-number incorrectly. It must be exactly T plus 13 digits; common formatting errors (hyphens, spaces, lowercase t) can cause the customer's input credit claim to be rejected.

Frequently asked questions

What is the JCT rate for SaaS sold to Japan?

10% (7.8% national + 2.2% local). The reduced 8% rate does not apply to SaaS.

What is a qualified invoice in Japan?

A tekikaku seikyusho includes the supplier's T-number, applicable tax rate, tax amount, and other prescribed details. Only registered Qualified Invoice Issuers can issue them.

Do foreign SaaS vendors need to issue qualified invoices?

Yes, if Japanese business customers want full input credit. Without a qualified invoice, the buyer loses input credit subject to the 80% / 50% transitional relief through 2029.

What is the JCT registration threshold?

Taxable sales in Japan exceeding ¥10,000,000 in the base period (two years prior). Voluntary registration is available below the threshold.