App features
- Customers issue documents themselves from the Thank you page, order status page and emails
- Invoice registration number (Japan) and tax breakdowns by rate (8% / 10%)
- Set your company logo, stamp and theme color
- Print from the admin one order at a time or in bulk
- Documents in Japanese and English
- Pro plan: remarks by payment method or tag, issued tags and issue limits
- Hydrogen plan: issue documents on headless (Hydrogen) stores too
*Note
Supports new customer accounts.
Partially supports classic customer accounts (supported themes: Dawn, Rise and Studio).
The consumption tax (Japan's sales tax) shown on receipts, invoices and quotes can sometimes differ by 1 yen from the amount calculated by another system. This article explains where the tax amount is calculated and why a 1-yen difference can occur.
In this article
- Who calculates the tax amount on documents
- How Shopify rounds consumption tax (amounts under 1 yen)
- Why the amount can differ by 1 yen from other systems
- Why the app doesn't recalculate tax
- Whether you can change the rounding method
This article explains how to read the amounts on your documents. No action is needed. For everything that appears on documents, see "What appears on receipts (invoice registration number, reduced tax rate, payment date)".
1️⃣ Shopify calculates the consumption tax
SAKU Receipts does not calculate consumption tax itself. It shows the tax rates and tax amounts recorded on the Shopify order (or the draft order, for quotes and invoices) on the document exactly as they are.
| Document field | Amount shown |
|---|---|
| Subtotal (対象小計) | For each tax rate, the total of the items at that rate (after discounts) plus shipping |
| Tax (対象消費税) | The consumption tax for that rate, as calculated by Shopify (unchanged) |
| Total (合計金額) | The total of the Shopify order (unchanged) |
The only thing the app does is format amounts with a comma every three digits, such as "¥11,340". It doesn't round amounts down or up.
2️⃣ How Shopify rounds tax
Shopify rounds amounts under 1 yen to the nearest yen when calculating consumption tax (it doesn't round down).
Example: a tax-inclusive price of 11,340 yen (10% tax rate)
- 11,340 yen × 10/110 = 1,030.90… yen
- Shopify's tax amount: 1,031 yen (rounded to the nearest yen)
Also, for draft orders — which quotes and invoices are based on — Shopify calculates tax per tax rate on the order total, not per item.
Example: 2 items at a tax-inclusive price of 1,004 yen each (8% tax rate)
- Calculating per item and adding up: 74 yen + 74 yen = 148 yen
- Shopify's calculation: 2,008 yen × 8/108 = 148.74… yen → 149 yen
3️⃣ Why amounts can differ by 1 yen from other systems
Accounting software or your business partners' systems may round down amounts under 1 yen, or calculate tax from the tax-exclusive price. When the rounding method differs, the tax for the same order can differ by 1 yen.
Example: an order with a tax-inclusive total of 11,340 yen (10% tax rate)
| Shopify and the app's documents | Example of a system that rounds down | |
|---|---|---|
| Calculation | 11,340 yen × 10/110 = 1,030.90… yen → rounded to nearest | Tax-exclusive 10,309 yen × 10% = 1,030.9 yen → rounded down |
| Tax amount | 1,031 yen | 1,030 yen |
| Total | 11,340 yen | 11,339 yen |
Neither calculation is wrong. The difference comes from different rounding methods.
4️⃣ Why the app doesn't recalculate tax
If the app recalculated only the tax on documents, it could cause problems such as:
- Documents where "Subtotal", "Tax" and "Total" no longer add up
- Document amounts that no longer match the Shopify order page or the amount the customer actually paid
For this reason, SAKU Receipts shows the tax calculated by Shopify as is. The tax and total on your documents always match the Shopify order page.
5️⃣ Can I change the rounding method?
The app has no setting to change how consumption tax is rounded (round down, round to nearest, round up) or to change the tax breakdown for individual documents.
Shopify's tax settings (Shopify admin → "Settings" → "Taxes and duties") apply to all orders in your store. As far as we know, there's no way to change the rounding for only specific orders or quotes.
Please check with your tax accountant or advisor whether your rounding method is acceptable for tax purposes.
FAQ
The tax on the document differs from the Shopify order page
Documents show the current tax amount of the Shopify order. If the amount changed because of a refund or an order edit, the document shows the updated tax. If it still differs, contact us at info@saku-apps.com with the order number.
A business partner says the consumption tax is off by 1 yen
As explained in "3️⃣ Why amounts can differ by 1 yen from other systems" above, this happens because of different rounding methods. The amounts on the document match the Shopify order.
I want to change only the tax by 1 yen without changing the total
This can't be done in the app. As far as we know, Shopify also has no way to change this for specific orders only.
