“Rather than love, than money, than fame, give me truth.” – Henry David Thoreau
Hello, my name is Taisei Koshida, and I am a certified public accountant and tax accountant.
I aim to assist non-Japanese business owners who struggle with reading or writing in Japanese. If you find the Japanese tax return system challenging, I can help you with your tax filings.
If you start a business in Japan, one of the first accounting decisions you will face is whether to keep your books using the cash basis or the accrual basis.
Many business owners assume accrual accounting is always better because it is the standard method for financial reporting. In practice, however, many small businesses can save considerable bookkeeping time by using a simplified monthly process while still preparing accurate year-end financial statements.
In this article, I explain the differences between the two methods and share the practical approach I often recommend to foreign business owners in Japan.
1. What Is the Difference Between Cash Basis and Accrual Accounting?
The main difference between accrual accounting and cash basis accounting is the timing of when income and expenses are recorded.
Under accrual accounting, transactions are recognized when the economic activity takes place, regardless of when money is actually received or paid. For example, sales are recorded when you have earned the right to receive payment.
Cash basis accounting is much simpler. Transactions are recorded only when money is actually received or paid.
Neither method is universally better. The right choice depends on your business size, reporting requirements, and how much time you want to spend on bookkeeping.
２. How Accrual Accounting Works in Practice
Let’s use monthly sales as an example.
Suppose your company closes its books on the last day of each month and issues invoices at the beginning of the following month.
Under accrual accounting, the revenue is recognized in the month when the goods are delivered or the services are completed, even if payment will not be received until the following month.
This approach gives a more accurate picture of your business performance because revenue is matched with the period in which it was earned.
3. How Cash Basis Accounting Works
Now let’s look at the same example using cash basis accounting.
Instead of recording revenue when the work is completed, you record it when the payment actually arrives in your bank account.
If you complete work in March and receive payment at the end of April, the revenue is recorded in April.
Many small businesses find this method much easier because bookkeeping follows actual cash movements. Bank statements often become the primary source of accounting records, reducing the time spent matching invoices and receivables.
４. Pros and Cons of Cash Basis vs. Accrual Accounting
Each accounting method has its own strengths.
Accrual accounting provides a more accurate picture of your company’s financial performance because income and expenses are recognized in the period in which they occur.
However, that accuracy comes at the cost of additional bookkeeping. You need to manage invoices, accounts receivable, accounts payable, and various timing differences.
Cash basis accounting is much simpler. Since most bookkeeping is based on actual bank transactions, monthly accounting usually requires much less time.
For many small businesses, the time saved each month is often more valuable than producing perfectly accurate monthly financial statements.
５. Why Year-End Tax Returns Still Require Accrual Accounting
One important point is that Japanese tax returns are generally prepared using accrual accounting.
Even if you keep your monthly books on a cash basis, year-end adjustments are normally required before filing your corporate or individual tax return.
For example, if your fiscal year ends on March 31 and you completed work in March but receive payment in April, that revenue generally needs to be included in March for Japanese tax purposes.
Cash basis bookkeeping can significantly reduce your monthly workload, but it does not completely eliminate accrual accounting.
６. My Recommended Accounting Method for Small Businesses in Japan
For most foreign-owned small businesses in Japan, I generally recommend a simplified monthly bookkeeping process combined with accrual adjustments at year-end.
Keep your monthly bookkeeping as simple as possible by recording transactions mainly on a cash basis.
Then, before preparing the annual tax return, make the necessary accrual adjustments for unpaid revenue and expenses.
In my experience, this approach provides an excellent balance between bookkeeping efficiency and tax compliance.
Unless your business needs detailed monthly financial statements for banks, investors, or management reporting, spending extra time every month on full accrual accounting often provides little practical benefit.
7. Why I Recommend This Hybrid Approach
After working with many foreign business owners in Japan, I have noticed a common pattern.
Many entrepreneurs spend too much time trying to produce perfectly accurate monthly financial statements, even though they rarely use them to make business decisions.
Unless your bank, investors, or headquarters require detailed monthly reporting, your time is usually better spent finding new customers, improving your services, or expanding your business.
For that reason, I often recommend keeping monthly bookkeeping as simple as possible while making the necessary accrual adjustments before preparing the annual tax return.
In many cases, this approach provides the best balance between efficiency, tax compliance, and business management.
8. Frequently Asked Questions
Can I use cash basis accounting for my Japanese tax return?
Monthly bookkeeping can be kept on a cash basis, but Japanese tax returns generally require accrual-based adjustments at year-end. In other words, cash basis accounting can simplify your monthly bookkeeping, but it does not eliminate the need to recognize accrued income and expenses when preparing your tax return.
Which accounting method is better for a small business?
There is no one-size-fits-all answer. If your priority is to reduce bookkeeping time while staying compliant with Japanese tax rules, a simplified monthly bookkeeping process combined with year-end accrual adjustments is often a practical solution. Businesses that need detailed monthly financial reports for banks, investors, or internal management may benefit more from full accrual accounting.
Will using cash basis accounting reduce my taxes?
No. Choosing cash basis accounting does not generally reduce your tax liability. The main advantage is that it simplifies your monthly bookkeeping. Your taxable income is ultimately determined under Japanese tax rules, which generally require accrual accounting when preparing tax returns.
When should a business switch to full accrual accounting?
Many businesses start with simplified bookkeeping during their early stages. As the business grows, hires employees, seeks bank financing, or begins reporting to investors or a parent company, switching to full accrual accounting often becomes more beneficial because it provides more accurate financial information.
9. Need Professional Accounting Support in Japan?
Koshida Accounting Firm specializes in helping foreign business owners and international professionals navigate Japan’s accounting and tax system.
In addition to accounting and tax services, we work closely with trusted specialists in immigration, company registration, social insurance, legal matters, and web marketing. This allows us to provide practical, one-stop support for doing business in Japan.
All of our services are available in English.
If you have any questions about accounting, taxation, or starting a business in Japan, please feel free to contact us through our inquiry form.