Expense Management Guide
Everything you need to know about expense tracking and categorization for freelancers and side-job workers.
Last updated: January 1, 2026·
For general reference only. Consult a tax professional for individual advice. Last verified: January 1, 2026 · Source: National Tax Agency
Expense Category Reference
Complete list of expense categories (勘定科目) for Japanese tax filing.
What Expenses Are Deductible? [2026]
Comprehensive list of potentially deductible business expenses for freelancers.
Expense Guide for Gig Workers
Expense tracking guide for Timee, Uber Eats, and delivery platform workers.
Side Job Expense Guide
How to manage expenses and file taxes for side income without employer discovery.
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Expense Checker Tool
Instantly check if an expense is deductible. Free tool that shows categories and deduction rates.
Frequently Asked Questions
Expenses that are necessary and ordinary for conducting business are deductible. This includes transportation, communication, supplies, and meeting expenses. Personal or family expenses are not deductible. See our deductible expenses guide for details.
Yes, if you use part of your home as an office, you can deduct a portion of your rent based on the floor area used for business. For example, if 10㎡ of a 30㎡ room is used as an office, about 33% of rent can be deducted. Keep records of your calculation basis.
Common categories include travel & transportation, communication, supplies, utilities, rent, and fees. The categories you use depend on your industry, but knowing 10-15 main categories is enough to start. Check our expense categories list for details.
Your expenses themselves will not be disclosed to your employer. However, if you don't choose "direct payment" for your residence tax, your side income may be reflected in your tax amount and noticed by your company. See our side job guide for details.
Track expenses, maximize deductions
Denpyo scans your receipts and finds tax savings automatically.