The Japanese Invoice System, Explained for Small Businesses

If you run a small business in Japan and you have ever been asked for your registration number by a client, this is the system they were asking about.

It is not complicated once you see the mechanics. It is just that the mechanics have a consequence that catches new and small businesses off guard, and the consequence is commercial rather than legal.

What changed

Japan has a consumption tax. Businesses charge it on sales and can deduct the consumption tax they paid on their own purchases. The difference is what they hand over.

Since October 2023, a business can only claim that deduction if it holds a qualified invoice from a registered supplier. The invoice has to carry the supplier's registration number, the applicable tax rates, and the tax amounts.

If your invoice does not have a registration number on it, your business customer generally cannot claim the credit. Transitional measures have softened this for a period, allowing a partial claim, and those measures step down over time and are scheduled to end.

Why this matters if you are small

Historically, businesses under a sales threshold were exempt from consumption tax. That was a genuine benefit for small operators. You charged it, you kept it, you did not file.

The invoice system did not remove that exemption. It made it commercially awkward to use.

If you stay exempt, you cannot issue qualified invoices. Your business customers then face a choice: absorb the cost, ask you to reduce your price by the tax amount, or find a registered supplier instead. Many will quietly do the third.

So a rule that is technically optional functions, in business to business work, as close to mandatory. Most small operators selling to companies register voluntarily and give up an exemption they were entitled to, because not registering costs them clients.

When you can ignore it

This is the part people miss, so it is worth stating plainly.

If your customers are consumers rather than businesses, none of the above applies to them. A private individual has no consumption tax to reclaim and will never ask for your number. A small business selling directly to the public can stay exempt with no commercial penalty at all.

If your customers are businesses, assume you need to register.

If you sell to both, do the arithmetic. What share of revenue comes from business customers, and would losing some of it cost more than the tax you would start remitting.

What registration actually commits you to

Three things, and the third is the one that surprises people.

You charge and remit consumption tax, and you file for it. That is the obvious part.

You issue invoices that meet the required format, and you keep copies. Most accounting software sold in Japan handles this now, but if you invoice from a spreadsheet you will need to change the template.

And you take on the filing burden permanently, in practice. Deregistering is possible but it puts you back in the position of not being able to issue qualified invoices, which is where you started.

There have been simplified calculation methods available to smaller registrants to reduce the accounting load. Whether they apply to you and for how long depends on your figures and the current rules, so this is a question for a 税理士 rather than a blog post.

What this means for pricing

Decide this before you quote, not after.

If you were exempt and you register, the consumption tax you collect is no longer yours. If your prices were set assuming you kept it, your effective revenue drops by roughly the tax rate on business sales, and that is a real cut.

The usual move is to state prices exclusive of tax to business customers, so the tax is visibly added and does not come out of your margin. To consumers, quote tax inclusive, because that is what they expect to see and a price that grows at checkout reads as a trick.

If you are new here

Two practical notes for foreign founders.

Registration is separate from incorporating and separate from your tax filings. It does not happen automatically because you formed a company, and a surprising number of new companies discover this when a client asks for a number they do not have.

And a client asking for your registration number is not being difficult or bureaucratic. They are being asked for it by their own accountant, who cannot close their books without it. Answering quickly, with the number and a correctly formatted invoice, is a small thing that makes you noticeably easier to work with than the alternative.

In a market where being easy to work with is most of how you get the second project, that is worth more than it sounds.