If you are starting out on your own, two common structures are the sole proprietorship and the One Person Company (OPC). Both are built around a single owner, but they are very different in law. A sole proprietorship is the simplest possible setup; an OPC is a registered company with a single member. Choosing between them affects your liability, your compliance burden and how others perceive your business. This article explains the differences in general terms so you can weigh them.
Reviewed by CA Harika Chebolu, FCA · Last updated 2026-06-15
Quick answer
Both let a single person run a business, but they differ sharply on liability, compliance and credibility. Here's how a One Person Company compares with a sole proprietorship and which suits whom.
A sole proprietorship is not a separate legal entity — it is simply an individual carrying on business in their own name or a trade name. There is no separation between the person and the business in law. A One Person Company, by contrast, is a registered company with a single member: it is a distinct legal entity, separate from its owner, formed and governed under company law. That single distinction — separate entity or not — is the root of almost every other difference between the two, so it is the first thing to understand.
In a sole proprietorship, the owner has unlimited liability. Because there is no separation between owner and business, the proprietor's personal assets are exposed to the business's debts and obligations. In an OPC, the company is a separate legal person, so the member's liability is generally limited to their investment in it; personal assets are, as a rule, shielded from business liabilities. For anyone whose business carries meaningful financial risk or could attract claims, this protection is often the deciding factor in favour of an OPC.
Simplicity is the proprietorship's main appeal. There is little to set up beyond the registrations relevant to the activity, and ongoing compliance is light — there is no company filing, no statutory audit driven purely by the structure, and no board formalities. An OPC, being a company, carries more: registration, ongoing filings with the registrar, maintenance of records, and the audit and disclosure obligations that come with the corporate form. That extra compliance has a cost in time and fees. The trade-off is structure and protection in exchange for more administration.
A registered company often carries more credibility with banks, larger customers and suppliers than an unregistered proprietorship, simply because it is a recognised, on-record entity with a separate identity. An OPC also has continuity: as a separate legal person it can, with the prescribed nominee arrangement, continue beyond the owner, whereas a sole proprietorship is tied to the individual. On funding, neither is ideal for bringing in equity investors the way a private limited company is, but the corporate form of an OPC gives a clearer path to converting or scaling later if the business grows.
The choice usually comes down to risk and ambition. If you are testing an idea, running a low-risk activity, or want the absolute minimum of administration, a sole proprietorship is often enough to start. If your business carries real liability, you value the credibility and continuity of a separate entity, or you expect to grow, an OPC may justify its extra compliance. The decision is not permanent: businesses commonly begin as proprietorships and move to a company structure as they grow. Match the structure to where the business realistically is now, not only where you hope it will be.
An OPC is a separate legal entity with limited liability, while a sole proprietorship is not separate from its owner. In a proprietorship the owner's personal assets are exposed to business debts; in an OPC the member's liability is generally limited to their investment. Almost every other difference flows from this.
The sole proprietorship — it is the simpler structure with a far lighter compliance burden. It avoids company filings, structure-driven statutory audit and board formalities. An OPC, as a company, has registration, ongoing registrar filings and the audit and disclosure obligations of the corporate form, which cost more in time and fees.
Yes — many businesses begin as a sole proprietorship and move to a company structure as they grow. The choice is not permanent, so it is reasonable to match the structure to where the business realistically is now and convert later if your risk, credibility needs or growth plans change.
Not sure whether to start as a sole proprietor or set up a One Person Company? Write to the firm and we'll weigh the liability, compliance and growth factors for your situation.