On August 15–16, 2026, Comic Market 108 (C108) takes place at Tokyo Big Sight. Whenever a circle's new release sells better than expected, the same question comes up: "Do I need to file a tax return for this?" The answer depends not on your sales but on your profit (income) — and doujin activity has three pitfalls that don't show up in typical side-hustle articles: unsold stock, cash sales at the venue, and invoices. Based on official National Tax Agency (NTA) sources, here is the order in which circle participants actually run into trouble.
The bottom line: the filing threshold depends on your situation
Whether you need to file a tax return for doujin activity is judged by your "income" — distribution revenue minus expenses — not by revenue itself. The thresholds differ by situation:
| Your situation | Threshold for an income tax return | Source |
|---|---|---|
| Company employee / part-timer (year-end adjustment done by employer) | Doujin income exceeds ¥200,000 | NTA No.1900 |
| Student / homemaker with no salary income | Doujin income exceeds the basic deduction (for 2026, the basic deduction is ¥950,000 if total income is ¥1.32 million or less) | NTA No.1199 |
| Already filing as a self-employed sole proprietor | Regardless of amount, combine with your main business and file | — |
There is no "¥200,000 rule" for resident tax
Even if you fall under the ¥200,000 threshold and don't need to file an income tax return, resident tax (juminzei) applies from the first yen. In that case you still need to file a resident tax return with your municipality. "Under ¥200,000 means I don't have to do anything" is a common misunderstanding — be careful (see how resident tax works and is calculated).
The ¥200,000 threshold is about "income," not "revenue"
For example, if your distribution revenue is ¥600,000 but expenses (printing, participation fees, transportation, etc.) total ¥450,000, your income is ¥150,000. Since that's under ¥200,000, no income tax return is required (a resident tax filing may still be needed separately). Conversely, even ¥300,000 in revenue can require a return if you have almost no expenses.
Business income or miscellaneous income? It comes down to your books
Income from doujin activity falls into either business income or miscellaneous income related to a business activity. This classification was clarified by the October 2022 (Reiwa 4) revision of Basic Income Tax Circular 35-2.
- The determination is based on whether the activity is conducted to a degree generally recognized as a "business" by social standards
- If you have not kept and retained bookkeeping records, the income is in principle treated as miscellaneous income related to a business activity (except where revenue exceeds ¥3 million and facts supporting business income exist)
In other words, the practical dividing line isn't "is this just a hobby" — it's whether you keep and retain proper books. Which category you fall into changes what systems you can use significantly.
| Available system | Business income | Misc. income (business-related) |
|---|---|---|
| Blue return special deduction (up to ¥650,000) | Available | Not available |
| Offsetting losses against salary income, etc. | Possible | Not possible |
| 3-year loss carryforward (blue return) | Possible | Not possible |
| Salary paid to family members working in the business | Available | Not available |
| Deducting expenses | Possible | Possible |
The blue return special deduction applies to business income and real estate income; to claim the full ¥650,000 you need double-entry bookkeeping plus either electronic book-keeping or e-filing. To use the blue return system, you must submit an application for approval by March 15 of that year (or within 2 months of starting the activity, if you started after January 16). For details, see blue return vs. white return and the guide to starting as a sole proprietor.
"Create a loss to offset against salary" won't work
If you file as business income purely to offset losses against salary, but lack the actual business substance and books to back it up, the income may be reassessed as miscellaneous income and disallowed. The determination is a comprehensive judgment based on factors like profit motive, continuity, and time devoted to the activity — formally "becoming a business" just to plug a loss is not accepted.
Expenses unique to doujin activity — what counts and what doesn't
Deductible expenses are costs directly incurred to earn that revenue, plus other business-related costs. For expenses shared with private life (household-related expenses), only the portion that can be clearly separated as business-related can be deducted.
Typically deductible
- Printing and binding costs (but see the inventory caveat below)
- Circle participation fees, catalog fees
- Transportation to the venue, shipping for delivery/pickup
- Fixtures (tablecloths, price tags, POP displays, display stands)
- Packaging materials and shipping fees for mail order
- Outsourcing costs for cover art or design
- Reference materials and purchase costs for assets/fonts used in production
- Fees for consignment sales or payment services
- The portion of communication/electricity costs used for production (apportioned)
Not deductible / requires care
- Printing cost for unsold copies (carried forward to next year as inventory)
- Food and drink for after-parties unrelated to production
- Everyday clothing that can also be worn privately (non-separable household expense)
- Liquid tablets or PCs costing ¥100,000+ (cannot be expensed in full at once — must be depreciated; under blue return, items under ¥300,000 have a special exception)
- Cash prepared as change (this is a transfer of funds, not an expense)
- The private portion of a trip combined with a family vacation
For high-value equipment, see the basics of depreciation and the special exception for small depreciable assets. For borderline expenses, see 10 gray-area expenses for sole proprietors.
The biggest pitfall: unsold copies are not an expense
This is where doujin circles trip up the most. Only the printing cost for copies you actually distributed can be expensed for the year — unsold inventory is not deductible. The cost of goods sold is calculated as follows:
Formula for cost of goods sold
Cost of goods sold = Beginning inventory + This year's printing costs, etc. − Ending inventory (as of December 31)
Let's plug in numbers. Say you printed 1,000 copies of a new release and distributed 600 at the summer event.
Printed 1,000 copies, distributed 600
| Printing cost (1,000 copies) | ¥200,000 (¥200 per copy) |
| ¥700 price × 600 copies | Revenue: ¥420,000 |
| Cost of goods sold (¥200 × 600 copies) | ¥120,000 |
| Ending inventory (¥200 × 400 copies) | ¥80,000 ← carried to next year (not this year's expense) |
| Participation fee, transportation, delivery, etc. | ¥50,000 |
| Income | ¥420,000 − ¥120,000 − ¥50,000 = ¥250,000 |
It's tempting to deduct the full ¥200,000 printing cost, giving "420 − 200 − 50 = ¥170,000," under the ¥200,000 threshold, and conclude no return is needed — but that's wrong. The correct figure is ¥250,000, which requires a tax return. This is the main reason people feel "my cash on hand didn't grow, but I still owe tax." The remaining 400 copies become an expense in whichever future year you actually distribute them.
There's really only one thing to do
Count and record how many copies you have left as of December 31. Once the year turns over, you can no longer count accurately. Just note the title, remaining quantity, and cost per copy — the calculation at filing time then takes only a few minutes. If you only distribute digital downloads, there's no inventory, so this calculation isn't needed.
How to record cash sales at the venue
Sales on the day of the event leave no trace in your bank statement or credit card records. Without records, you can't keep proper books, which is itself a reason your income may be treated as miscellaneous. It's not complicated — just note these three things on the day:
- Copies on hand at the start and end (the difference is what you distributed; keep free giveaways and sample copies separate)
- The distribution price and total sales for the day (subtract the change fund you prepared)
- Costs incurred that day (keep photos of receipts for participation fees, transportation, delivery)
You may sometimes be asked for a receipt. A receipt for a monetary payment is exempt from stamp duty if the amount is under ¥50,000 (Stamp Tax Act, Appendix Table 1, Document No.17). It's rare for doujin sales to involve a receipt of ¥50,000 or more, but keep this in mind for bulk purchases. See the basics of accounts and bookkeeping entries for how to keep records.
Consignment sales, mail order, support sites: when and how much to record
If you use bookstore consignment, mail order, or a support platform, there are two points that, if you get them wrong, will throw off both your revenue and expenses.
1. Revenue is the "gross amount" before fees are deducted
If you only record the amount that actually lands in your bank account, both your revenue and expenses will be understated. The correct approach is to record the full distribution price as revenue, and record the consignment/payment fees deducted from it as an expense. Always keep statements from doujin consignment bookstores (Toranoana, Melonbooks, etc.) or download-sale platforms that show the fee breakdown clearly.
2. The date to record is when the sale was "confirmed," not when payment arrived
A sale made in December but paid out in January is, in principle, recorded as revenue for the year it was sold (accrual basis). Consignment or download sales that straddle year-end can end up a year off if you only look at payment statements — be careful.
Support payments received through creator support services (such as pixivFANBOX) are also taxable income with a payment-in-exchange-for-value character, even if labeled "support." These services don't withhold tax and don't issue payment statements, so you need to total the amounts yourself. For general online sales, see taxes on point programs and flea-market apps; for expenses when earning through creative work or content, see expenses for influencer side businesses.
Do you need to register for invoices? Most circles don't
The short answer: circles that only distribute to general readers generally do not need to register as a qualified invoice issuer. There are two reasons:
- Consumption tax is exempt if taxable sales in the base period (two years prior, for individuals) are ¥10 million or less (with some exceptions, such as taxable sales exceeding ¥10 million during January–June of the prior year)
- Invoices exist so that the buyer can claim an input tax credit. If your buyers are ordinary readers, they have no need for an invoice in the first place
Once registered, you cannot go back to being tax-exempt
Once you register as a qualified invoice issuer, you are no longer exempt from consumption tax even if your taxable sales stay under ¥10 million. Registering "just in case" means taking on the burden of consumption tax payment and filing on your own — confirm you actually need it before deciding.
It's worth considering registration when your counterparty is a taxable business, such as:
| Type of transaction | Counterparty | Need for invoices |
|---|---|---|
| Distribution at events / mail order to individuals | General readers | Basically not needed |
| Bookstore consignment of doujinshi | Consignment bookstore (taxable business) | Check the bookstore's terms |
| Manuscript fees or illustration work commissioned by a company | Company (taxable business) | Sometimes requested |
Note that there's a transitional measure letting buyers deduct a portion of purchases from tax-exempt businesses, but the deductible portion drops from 80% to 50% starting October 1, 2026 (through September 30, 2029). Around that time, a business partner may ask whether you're registered. That said, unilaterally cutting off a transaction or lowering compensation solely because you're not registered can raise concerns under the Antimonopoly Act and the Subcontract Act, according to the Japan Fair Trade Commission. For the invoice system overall, see the invoice system and tax-exempt businesses; for relief measures for those already registered, see the end of the invoice 20% special exception.
Points students and dependents often miss
If a student who is a dependent of their parents earns income from doujin activity, what matters most isn't their own tax — it's their parent's tax.
- Dependent status is determined by total income of ¥580,000 or less (from 2025; it was ¥480,000 before that). Part-time job salary income and doujin income are combined for this determination
- For college-age dependents aged 19 to under 23, there's a special dependent deduction for specified relatives that phases in gradually even above ¥580,000 (see student part-time jobs and parental dependent status)
- The working student deduction (¥270,000) requires total income of ¥850,000 or less (from 2025; it was ¥750,000 before that), among other conditions. This determination also includes doujin income
For how resident tax and effects on your employer work when a company employee does doujin activity as a side business, see tax filing for side businesses for a detailed breakdown.
Derivative works and taxes are separate issues
One commonly confused point: rules around a work's rights (such as following the original creator's or publisher's guidelines) are a matter of copyright, a separate axis from taxation. For tax purposes, regardless of what activity the income arose from, as long as you have income, it is subject to income tax and resident tax. Deciding "I can't file because this is a gray-area activity" only invites a completely different risk: penalties for failure to file and late-payment interest. If you realize you've missed filing, see recovering from non-filing; for what a tax audit actually looks like, see the reality of tax audits.
Do this today
- On the day of the event, note the starting and ending copy counts and the distribution price on your phone (a record you can't recreate afterward)
- Gather receipts for printing, circle participation fees, transportation, and delivery in one place (a photo folder is fine)
- On December 31, count and record how many copies remain in stock (essential for calculating cost of goods sold)
For more actions, see the take-home-pay boost checklist.
Frequently Asked Questions
Do I not need to file if I had a loss for the year?
If you can file as business income, you can offset the loss against salary income, etc., so filing can work in your favor. Under a blue return, you can also carry the loss forward for 3 years. Losses classified as miscellaneous income related to a business, on the other hand, cannot be offset or carried forward. Also, even if an income tax return isn't required, a resident tax filing may still be necessary.
If my distribution revenue is under ¥200,000, do I really not have to do anything?
No. The ¥200,000 rule applies only to income tax returns and does not apply to resident tax, so a filing with your municipality is still required. Also, if you file an income tax return for another reason (such as a medical expense deduction or furusato nozei), you must include all income, even amounts under ¥200,000. The principle is: if you're filing at all, include everything.
Can I expense the full printing cost for 1,000 copies in the year I printed them?
No. Only the portion corresponding to copies actually distributed can be expensed; unsold copies as of December 31 are carried forward as inventory. Cost of goods sold is calculated as beginning inventory plus that year's printing costs minus ending inventory. You need to count your remaining copies at year-end.
Do doujin circles need to register for invoices?
Not generally, if you only distribute to general readers, since consumers don't need invoices in the first place. It's worth considering if your counterparty is a taxable business, such as bookstore consignment or corporate commissions. Registering makes you liable for consumption tax even under ¥10 million in taxable sales, and you cannot revert to tax-exempt status afterward.
- NTA No.1900: Employment income earners who need to file a return (Japanese)
- NTA Basic Income Tax Circular Article 35 (Miscellaneous Income), 35-2 (Japanese)
- NTA No.2210: Necessary expenses (cost of goods sold, household-related expenses) (Japanese)
- NTA No.2070: Blue return system (Japanese) / No.2072: Blue return special deduction (Japanese)
- NTA No.1199: Basic deduction (Japanese) / No.1180: Dependent deduction (Japanese) / No.1175: Working student deduction (Japanese)
- NTA No.6501: Exemption from tax liability (¥10 million base-period taxable sales) (Japanese)
- NTA: Transitional measures for purchases from tax-exempt businesses (80%/50% periods) (Japanese)
- NTA No.7105: Receipts for money or securities (exempt under ¥50,000) (Japanese)
- Japan Fair Trade Commission: Antimonopoly Act perspective on transactions with tax-exempt businesses after the invoice system (Japanese)
This article is general information, not individual tax advice — please confirm with your local tax office or a certified tax accountant (zeirishi) for your specific situation. Event dates and venue rules are subject to the organizer's latest announcements. Systems and rules may change.