Planning
Track side-project income without confusing sales and profit
Keep fees, expenses and non-cash rewards separate in a simple record.
Use separate columns
Create a record with date, activity, gross sale, platform fee, other expense and amount received. Add a notes column for refunds or adjustments. A screenshot of sales alone does not show profit. Record amounts consistently and keep the underlying receipts or statements so you can explain each entry.
Record cash and non-cash benefits separately
Keep points, coupons and shopping credits in a separate section from cash receipts. Record their restrictions and expiry where relevant. Do not add a coupon’s headline value to your bank balance. The way a reward is treated for tax purposes depends on the circumstances; this planning sheet is not a tax determination.
Use a planning example carefully
Illustrative example: ten sales at ¥1,000 each produce ¥10,000 in gross sales. If the assumed fee is 10% and other expenses are ¥1,000, the remaining amount is ¥8,000 before tax. These inputs are examples, not a platform fee quote or an earnings forecast. Real sales may be zero, and actual costs can differ.
Include your time
Track preparation, communication, production, revisions and administration. Divide your result by total hours only after including all the work. This helps you compare projects realistically. A project can have positive cash flow while using more time than it is worth to you.
Review monthly
Reconcile your notes with statements and resolve missing entries. Keep personal purchases separate from project costs. Use official guidance or qualified advice for questions about reporting and deductions. A tidy project log makes that conversation easier; it does not replace professional advice or official requirements.
Useful official resources
These are reference links, not a claim that the agencies endorse this article. Our introductory guides are general education, not individual legal, tax or financial advice.