Ordering from Sole Proprietors vs. Corporations — Legal Differences

There is no shortage of cases where ordering parties proceed with outsourcing without accurately understanding the differences between contracting with sole proprietors and corporations, only to encounter serious problems later.

Consider Company A, which handles system development. The company contracted both a freelance engineer, Mr. Tanaka (a sole proprietor), and a corporate entity, B Development Co., Ltd., on a new project. The contract amount was 500,000 yen per month for both, and since the work content was similar, Company A's person in charge processed the two contracts under the same conditions.

However, three months into the project, a serious problem came to light. Because withholding had not been applied to payments to Mr. Tanaka, the tax authority issued a notice and demanded payment of approximately 150,000 yen in back taxes. Furthermore, when B Development Co., Ltd. caused damages through a delivery delay, it became clear that the method of pursuing liability was entirely different from what would apply if Mr. Tanaka encountered a similar problem.

The background to this kind of confusion is a lack of awareness on the ordering side. The assumption that "it's the same type of service agreement, so the procedures are the same" leads to errors in tax processing, gaps in contract terms, and ambiguity in the scope of liability. The result is unexpected cost burdens and legal risks.

Before deciding whether to order from a freelancer or a corporation, it is necessary to understand the fundamental differences in their legal status.

Differences in Liability Based on Legal Personality

A corporation has an independent legal personality, so the contracting party is the corporation itself. It holds rights and obligations separately from the individual representative. A sole proprietor, on the other hand, is a natural person who is directly the contracting party, and bears all business-related liabilities personally.

This difference becomes pronounced in the event of contract breach. If damages arise in a contract with a corporation, the responsible assets are in principle limited to the corporation's assets. With a sole proprietor, however, not only business assets but also personal assets may potentially be subject to liability.

Differences in Tax Treatment

The most direct impact for ordering parties comes from differences in tax processing. When paying remuneration to sole proprietors, withholding tax obligations arise under Article 204 of the Income Tax Act. Specifically, for design or manuscript fees, withholding is required at 10.21% (20.42% on the portion exceeding 1 million yen); the same rates apply to fees for specialized services such as judicial scriveners and tax accountants.

In principle, no withholding is required on payments to corporations. However, there are some professional corporations — such as law corporations and tax accountant corporations — where withholding may still be required.

Differences in Contract Execution Authority

In a corporation, the representative executes contracts on behalf of the company, but the scope and limitations of that authority must be confirmed against the articles of incorporation and registration records. For sole proprietors, the person directly executes the contract, so there is no need to confirm powers of attorney or agency relationships.

Note, however, that when family members assist with the business of a sole proprietor, the person who signs the contract and the person who performs the work may differ in some cases.

Here is a summary of the specific points ordering parties should confirm in order to reflect the differences between contracting with sole proprietors versus corporations in actual practice.

Practical Withholding Tax Processing

When ordering from a sole proprietor, always confirm at contract signing whether the work is subject to withholding tax. If it is, advance agreement on how the invoice should be prepared is necessary.

For example, when commissioning design work at a monthly rate of 300,000 yen from a sole proprietor, the invoice should state: "Remuneration: ¥300,000; Withholding tax: ¥30,630; Amount payable: ¥269,370." For a corporation, a simple statement of "Service fee: ¥300,000" suffices.

At year-end, a payment record (shiharai chousho) must be issued to sole proprietors. There is no obligation to issue payment records for payments to corporations (although submission to the tax authority is required).

Differences in Contract Drafting

In contracts with sole proprietors, enter the individual's name in the contractor field, adding the trade name if one exists. The address used should in principle be the address on the resident registry, but a business address may also be used if one exists.

For contracts with corporations, accurately enter the corporate name, representative's name, and registered office address. Checking the commercial registration certificate before signing to confirm there have been no changes to the corporate name or representative's name is a safe practice.

Differences in Payment Terms and Invoice Processing

Because of the withholding tax relationship, payments to sole proprietors often differ from the invoiced amount. Configuring the accounting system to automatically calculate withholding tax amounts enables smooth processing.

Payments to corporations are made in the invoiced amount, making processing relatively simple. However, note that for corporations, input tax credits cannot be claimed unless the invoice meets the requirements for a qualified invoice (invoice system).

Response Policy in the Event of Contract Breach

If a sole proprietor breaches a contract, the response involves direct negotiation with that person. It is important to have alternative plans in place and to set deadlines with some margin, given the risk that illness or accident may make it impossible to continue work.

With a corporation, changes in the person in charge or organizational restructuring are easier to accommodate, but the loss risk in the event of dissolution or bankruptcy may be greater than with a sole proprietor.

Here are specific examples of misconceptions and judgment errors that ordering parties tend to make in practice, along with countermeasures.

The Misconception That "Sole Proprietors Are Cheaper"

Many ordering parties believe that ordering from sole proprietors is cheaper than ordering from corporations. While the remuneration itself may often be lower for sole proprietors, when the ordering party's administrative costs are included in the comparison, this is not necessarily the case.

Ordering from sole proprietors generates withholding tax calculations, payment record preparation, and year-end administrative processing. When withholding is processed 12 times per year under a monthly ongoing contract, the accounting staff workload is often about 1.5 times that of ordering from a corporation.

If an accounting staff member with an hourly rate of 3,000 yen spends an additional 30 minutes per month, 18,000 yen in hidden costs arise annually. If the difference in remuneration is less than this amount, the actual cost of ordering from a corporation may be lower.

Overconfidence in "Legal Personality as a Mark of Reliability"

While having a corporate legal personality enhances social credibility, this is a separate matter from actual work quality and continuity. For newly established corporations or those with little capital, the practical difference in management foundations from a sole proprietor may be small.

In selecting contractors, work history, financial status, and operational structure are more important than legal personality. For corporations, requesting financial statements is important; for sole proprietors, confirming copies of tax returns or revenue records is valuable.

Insufficient Awareness of the Scope of Withholding Obligations

Not a few ordering parties mistakenly believe that "all payments to sole proprietors require withholding tax." The types of remuneration requiring withholding are exhaustively listed in the Income Tax Act, and not all work is subject to it.

For example, commissioning cleaning or transportation work from a sole proprietor does not require withholding. But commissioning a website from the same sole proprietor would require withholding. It is important to accurately classify the work content and determine whether withholding is required.

Oversights Regarding Contract Termination Procedures

When terminating a contract with a corporation, changes in representative or organizational restructuring may alter the status of the contracting party. When terminating a contract with a sole proprietor, the processing of any outstanding withholding tax and the timing of payment record issuance must be organized.

Contract termination procedures should be specified in the contract, and for sole proprietors in particular, the final withholding tax settlement procedure should be defined.

Based on the analysis above, here are specific criteria for deciding whether to order from a sole proprietor or a corporation.

Judgment Based on Project Scale and Duration

For small-scale projects completed within three months, ordering from a sole proprietor is appropriate. The administrative burden of withholding processing is limited, and quick decision-making is possible.

For long-term projects of six months or more, or where multiple people are required, ordering from a corporation should be considered. Managing changes in personnel and work allocation is easier, and there are greater advantages from a project management perspective.

Choice Based on Risk Tolerance

The ordering party's risk tolerance is also an important factor. Ordering from a sole proprietor carries the risk that illness or accident may halt the work. For critical tasks or specialized work that is difficult to replace, ordering from a corporation that has multiple personnel is safer.

Conversely, for highly creative work or tasks where personal skills are important, ordering from a sole proprietor may be appropriate. When seeking the style or expertise of a specific creator, it may not be possible to obtain the desired quality through a corporation.

Comprehensive Cost Analysis

A comprehensive judgment that includes not just the remuneration amount but also the ordering party's administrative processing costs is required. As noted above, ordering from sole proprietors generates hidden costs associated with withholding processing.

When the number of annual transactions is high (two or more payments per month) or when ongoing transactions are planned, ordering from a corporation has higher administrative efficiency. For one-off transactions or those occurring only once or twice a year, the administrative burden of ordering from a sole proprietor will not be heavy.

Fit with the Ordering Party's Organizational Structure

The ordering party's accounting structure is also a consideration. If accounting staff are not experienced in withholding tax processing, or if the accounting system does not support automatic calculation of withholding tax, prioritizing orders to corporations helps prevent mistakes.

On the other hand, organizations experienced in transactions with freelancers can process orders from sole proprietors smoothly. It is important to select contractors taking into account internal experience and system environment.

For ordering parties, what matters most is accurately understanding the differences between ordering from sole proprietors and corporations, and making choices appropriate to the company's business characteristics and organizational structure. Building a framework for evaluating cost, risk, and administrative burden comprehensively and selecting the optimal contractor for each project provides the foundation for stable outsourcing.

References

Overview of the Act on Proper Transactions with Specified Consignees (2024)

Guidelines for Creating an Environment Where Freelancers Can Work with Peace of Mind (2021)

Overview of the Act against Delay in Payment of Subcontract Proceeds, Etc. to Subcontractors (2024)

Subcontract Promotion Seminar Text (2024)