Tax and CPF Treatment Differences: Sole Proprietorship vs LLP vs Pte Ltd

Raffles Corporate Services works with a panel of corporate and employment law firms; this article is general information, not legal advice.

Choosing between a sole proprietorship, an LLP and a Pte Ltd changes far more than paperwork: it changes how your profits are taxed, whether you personally owe CPF contributions, and how much of your income is exposed if the business is sued, which is why the tax and CPF treatment differences matter more than the registration cost.

Tax and CPF treatment differences at a glance

In short: a sole proprietor is taxed personally on all profit and owes only Medisave once net trade income passes S$6,000; an LLP partner is taxed personally on their profit share with the same Medisave-only treatment; and a Pte Ltd pays corporate tax on retained profit while any director’s salary triggers full employer and employee CPF contributions. The rest of this guide walks through why, and how to choose between them.

What each structure actually is

A sole proprietorship, registered under the Business Names Registration Act 2014, has no legal personality separate from its owner; the owner and the business are the same person in law. An LLP, registered under the Limited Liability Partnerships Act 2005, is a body corporate with its own separate legal personality under section 4 of that Act, while its partners’ liability for the LLP’s debts is limited under section 12, except for their own wrongful acts. A Pte Ltd, incorporated under the Companies Act 1967, is also a separate legal person, but unlike an LLP it has share capital, shareholders and a board of directors, and its profits belong to the company rather than flowing straight through to the owners as personal income.

Who each structure suits

A sole proprietorship suits a single owner running a small, low-risk operation who wants minimal compliance and is comfortable with unlimited personal liability. An LLP suits two or more professionals, such as consultants or a small partnership, who want limited liability without the compliance overhead of a company, though section 28 of the Limited Liability Partnerships Act 2005 requires a minimum of two partners at all times. A Pte Ltd suits a business that plans to raise capital, bring in investors or co-founders with defined shareholdings, hire staff at scale, or simply wants the credibility and asset protection of a separate legal entity.

How profits are taxed: the core difference

This is where the three structures diverge most sharply. A sole proprietor’s business profit is added to their other personal income and taxed under the Income Tax Act 1947 at the individual’s marginal personal tax rate, which is progressive and can reach 24% at the top band. An LLP is tax-transparent: the LLP itself does not pay tax on its profits; instead, each partner’s share of the profit is taxed in that partner’s own hands, at personal rates if the partner is an individual, or at the corporate rate if the partner is itself a company. A Pte Ltd pays corporate tax on its profits at a flat rate of 17%, with up to 75% exemption on the first S$100,000 of chargeable income and 50% exemption on the next S$100,000 under the partial tax exemption scheme, and profits are only taxed again in the shareholder’s hands if and when they are paid out as dividends, which Singapore does not tax further for the recipient, since Singapore operates a one-tier corporate tax system.

The practical effect is that a profitable business retained and reinvested inside a Pte Ltd is usually taxed more lightly overall than the same profit earned by a sole proprietor at a high marginal personal tax rate, while a small, modestly profitable sole proprietorship or LLP can sometimes come out ahead because personal tax rates start lower than 17% at low income levels and the qualifying new company start-up tax exemption is unavailable to sole proprietorships and LLPs.

CPF treatment: the difference that catches people out

CPF treatment follows the same personal versus corporate divide, but in a way that surprises many first-time owners. A sole proprietor and an individual partner in an LLP are both treated as self-employed persons for CPF purposes: they are not required to make ordinary CPF contributions on their business income, but they are required to make Medisave contributions once their net trade income exceeds S$6,000 a year, assessed and collected by IRAS on the CPF Board’s behalf. A director of a Pte Ltd who also draws a salary from the company is treated as an employee for CPF purposes on that salary, meaning both the company (as employer) and the director (as employee) must make full CPF contributions on it, covering Ordinary, Special and Medisave accounts, subject to the monthly and additional wage ceilings.

This means a Pte Ltd director who pays themselves a salary builds full CPF savings, including for housing and retirement, in a way a sole proprietor or LLP partner drawing profit rather than salary does not, unless the individual chooses to top up their own Medisave or other CPF accounts voluntarily. Many founders assume that because they are self-employed, no CPF obligations attach to them, then discover a Medisave shortfall assessment from IRAS after their first profitable year of trading as a sole proprietor.

Liability exposure: what is actually at risk

A sole proprietor’s personal assets, including their home if not otherwise protected, are exposed to the business’s debts and legal claims without limit, because there is no separate legal person standing between the owner and the liability. An LLP partner’s liability is limited to the LLP’s assets for the LLP’s own debts, but section 12 of the Limited Liability Partnerships Act 2005 does not protect a partner from liability for their own wrongful act or omission, or that of someone under their direct supervision, so professional negligence claims can still reach an individual partner personally. A Pte Ltd shareholder’s liability is generally limited to the amount unpaid on their shares; the company’s debts stay with the company, not the shareholders, subject to specific exceptions such as personal guarantees given to a bank or director conduct that amounts to wrongful trading.

Cost and timeline to register each structure

A sole proprietorship costs S$115 for a one-year registration or S$175 for three years through ACRA’s BizFile+, and is typically approved within minutes to a day where no referral to another agency is needed. An LLP costs S$115 to register, with similarly fast approval. A Pte Ltd costs S$315 in total (S$15 name application plus S$300 incorporation) and, once the resident director and company secretary are confirmed, is usually approved within one to three working days. The ongoing compliance cost is where the real difference emerges: a sole proprietorship has almost no annual statutory filing beyond renewal, an LLP must lodge an annual declaration of solvency or insolvency, and a Pte Ltd must hold annual general meetings or pass written resolutions, file annual returns, and, once it exceeds certain size thresholds, prepare audited financial statements.

Worked example: the same S$150,000 profit, three ways

Consider a consultant earning S$150,000 in annual profit under each structure, to make the difference concrete. As a sole proprietor, the full S$150,000 is added to any other personal income and taxed at Singapore’s progressive personal rates, landing an unmarried individual with no other income at an effective personal tax bill in the region of S$14,000 to S$15,000 after basic reliefs, plus a Medisave contribution assessed on the net trade income. As one of two equal LLP partners each earning S$75,000 in profit share, each partner is taxed individually on their S$75,000 share at personal rates, which, because of Singapore’s progressive bands, produces a materially lower combined tax bill than one person being taxed on the full S$150,000, simply because splitting income across two individuals means more of it sits in lower tax bands. As a Pte Ltd retaining the S$150,000 as company profit before any salary or dividend, the company pays corporate tax of roughly 17% on the amount above the partial exemption tiers, works out to an effective rate of well under 17% on the first S$200,000 of chargeable income, and pays no further tax if the money is retained rather than distributed; only when a dividend is paid does the shareholder receive it, and Singapore does not tax that dividend again in the shareholder’s hands under the one-tier system. None of these outcomes is universally “best”: the sole proprietorship is simplest but taxed most heavily at this income level, the LLP structure benefits from income-splitting between partners, and the Pte Ltd defers and reduces tax while profit stays inside the company, at the cost of ongoing compliance.

Step-by-step: matching the structure to your tax and CPF position

  1. Estimate your expected profit for the first two years, and compare your personal marginal tax rate at that profit level against the 17% corporate rate with partial exemption.
  2. Decide whether you plan to draw a salary (which triggers CPF as an employee if incorporated) or take profit as a sole proprietor or partner (which triggers only Medisave once net trade income passes S$6,000).
  3. Assess your liability exposure realistically: if the business carries meaningful contract, tenancy or professional liability risk, weight this heavily toward an LLP or Pte Ltd regardless of the tax outcome.
  4. If choosing a Pte Ltd, factor in the annual compliance cost (company secretary, annual return, possible audit) against the tax savings, since these are not free.
  5. If choosing an LLP, confirm you have at least two partners as required by section 28 of the Limited Liability Partnerships Act 2005, and agree in writing how profit shares (and therefore each partner’s personal tax liability) will be allocated.
  6. Register through BizFile+, and register as an employer with the CPF Board immediately if the entity will pay any salary, including to a working director.

Common mistakes

  • Assuming a Pte Ltd director drawing no salary still gets CPF contributions; without salary, there is no CPF contribution to make, only voluntary top-ups if desired.
  • Forgetting the Medisave contribution obligation as a self-employed sole proprietor or LLP partner once net trade income exceeds S$6,000 a year.
  • Choosing a Pte Ltd purely for the lower headline tax rate without pricing in company secretary fees, annual return filing, and the cost of preparing financial statements every year.
  • Assuming LLP partners have no personal exposure at all, overlooking that section 12 of the Limited Liability Partnerships Act 2005 does not protect against liability for one’s own wrongful acts.
  • Registering an LLP with only one partner in practice, breaching the minimum of two partners required by section 28 of the Limited Liability Partnerships Act 2005.

When it makes sense to convert later

None of these choices need be permanent. A common growth path is to start as a sole proprietorship or LLP while testing a business idea with minimal compliance cost, then convert to a Pte Ltd once profit, headcount, or investor interest justifies the additional compliance burden. Section 27 of the Limited Liability Partnerships Act 2005 specifically provides a conversion route from a private company to an LLP, and in practice conversions more often run the other way, from a sole proprietorship or LLP into a newly incorporated Pte Ltd, since there is no equivalent statutory conversion mechanism for turning a sole proprietorship directly into a company; instead the business is typically transferred into a newly incorporated Pte Ltd via a sale of assets or a business transfer agreement, with the tax and CPF treatment then switching over from the date of transfer, not retrospectively.

FAQs

Do sole proprietors pay CPF?
Not ordinary CPF contributions on business profit, but Medisave contributions become compulsory once net trade income exceeds S$6,000 a year, assessed via IRAS.

Is a Pte Ltd always more tax-efficient than a sole proprietorship?
Not always; at low profit levels a sole proprietor’s personal tax rate can be lower than the effective rate a Pte Ltd pays after accounting for compliance costs, so it depends on the profit level and whether profits are retained or distributed.

Can an LLP partner draw a CPF-contributing salary?
Only if the partner is also formally an employee of the LLP drawing salary as such, which is unusual; most partners are taxed on their profit share as self-employed persons instead.

How many partners does an LLP need?
At least two at all times, under section 28 of the Limited Liability Partnerships Act 2005; falling to one partner for an extended period can lead to the LLP being wound up.

Does converting from a sole proprietorship to a Pte Ltd change CPF obligations?
Yes, once incorporated, any salary the former sole proprietor draws as a director-employee becomes subject to full employer and employee CPF contributions, unlike the Medisave-only treatment as a sole proprietor.

Related reading

For a closer look at how CPF contributions work once you are drawing a salary as a director, see our companion article on CPF contributions for company directors in Singapore. Founders who are themselves foreign and considering an EntrePass to justify running the business full-time should see Little Big Employment Agency’s guide to EntrePass founder eligibility and renewal. On the tax administration side, Raffles Corporate Services has covered how IRAS assessments and objections are going fully digital by 2027, relevant whichever structure you choose.

For primary guidance, see ACRA’s business registration information and IRAS’s guidance on tax for self-employed persons and partnerships.

Need help with this? Call, SMS or WhatsApp +65 8501 7133, or email [email protected]. Raffles Corporate Services works with a panel of corporate and employment law firms; this article is general information, not legal advice.