A sole proprietorship in Singapore is registered with ACRA under a business name, and the owner is personally liable for all debts. It suits small, low-risk trades, because profit is taxed as the owner's personal income. Consider moving to a Pte Ltd when liability, investors or larger clients start to matter.
A sole proprietorship is not a separate legal entity. The business and its owner are the same person in law, which means contracts, debts and lawsuits attach directly to the owner's personal assets. Registration is under the Business Names Registration Act 2014, administered by ACRA, and the registered business name is the trading name, not a company name.
The owner must be at least 18 and not an undischarged bankrupt. A person who is not a Singapore citizen or permanent resident faces additional requirements, such as appointing a locally resident manager, and some visa categories do not permit self-employment at all. Check your immigration status with MOM before assuming you can register.
Registration through BizFile+ produces a UEN for the business. That number identifies you with IRAS, banks and customers, and it appears on invoices in the same way a company's UEN would.
The application asks for the proposed name, the owner's identity details, the business address and the SSIC codes describing what the business does. ACRA assesses the name against existing entities and against restricted words. Names that imply a company, a bank or a government link are refused unless the necessary approval exists.
The registration runs for a fixed term and must be renewed; the current term and fees are on ACRA's website. Missing a renewal lapses the registration, and trading under a lapsed name can create problems with banks and customers who check the register.
Keep a note of your SSIC choice. The primary activity code affects how some agencies classify the business, and some regulated activities need a licence before trading, regardless of the legal form.
There is no separate corporate tax for a sole proprietorship. Business profit is added to the owner's other income and taxed at the progressive resident individual rates, with the owner filing an annual individual return with IRAS and declaring business income through the relevant business schedule. Keep records of income and expenses for at least five years.
Goods and Services Tax is a separate question. GST registration becomes compulsory when taxable turnover exceeds S$1 million, and voluntary registration is available below that level. Turnover counts taxable supplies, so zero-rated exports are included in the test but exempt supplies are treated differently. Once registered, you charge GST at the prevailing rate, currently 9 %, on standard-rated supplies and file returns.
Track cumulative turnover in your own bookkeeping each month. If you pass the threshold unnoticed, you may owe GST you did not charge customers, which is hard to recover from them afterwards.
The main drawback is unlimited personal liability. A supplier dispute, a damaged shipment or an unpaid lease can reach your savings and home. Larger customers and some government buyers prefer a limited company because it signals continuity and caps the owner's exposure.
Funding is another limit. A sole proprietor cannot issue shares, so bringing in an investor or a co-founder means changing structure. Banks may also ask for personal guarantees in any case, so the liability benefit of a Pte Ltd is smaller than founders expect until the company has a trading record.
Converting means incorporating a new Pte Ltd and transferring the business, since the sole proprietorship itself cannot become a company. Plan for new contracts, a new bank account, a GST registration decision for the company and the closure of the old business name with ACRA.
Banks open an account for a sole proprietorship against the ACRA business profile, but many require a trading name that matches the registered one and proof of address. A separate business account is not legally required, yet mixing personal and business payments makes the annual tax return harder to prepare, and a clean statement is the first thing a lender or landlord will ask to see.
Check the premises before you register. Running a business from a public housing flat is subject to the Housing and Development Board's rules, and a shopfront or a food stall needs the relevant licence from the responsible agency. The registration with ACRA proves the name, not permission to trade.
A sole proprietor with employees becomes an employer. Citizens and permanent residents on the payroll attract employer and employee CPF contributions, and the owner's own CPF position is separate, because self-employed persons follow different rules. Work out the cost of a first hire before you advertise the role.
Employees on work passes are governed by MOM rules rather than CPF. Work injury compensation insurance is required for manual workers and recommended for others, and an insurer can explain which category applies to your staff. Hiring is also a signal to review whether unlimited personal liability is still acceptable.
Even without a GST registration, a clear invoice helps you get paid. Include your business name, UEN, address, a unique invoice number, the date, the description of goods or services, the amount in Singapore dollars and your payment details, such as your PayNow or bank account.
4invoices.net creates PDF invoices and keeps an invoice archive, which suits a sole trader who wants one place for every document issued. It does not file with IRAS, does not monitor your turnover against the GST threshold and does not transmit InvoiceNow documents. Check any InvoiceNow or GST duty directly with IRAS.
Many sole traders assume that small-scale status means no InvoiceNow question arises — but the InvoiceNow requirements for GST-registered businesses are being phased in, so the position can change.
Confirm with IRAS whether the Peppol requirement applies to you. 4invoices produces PDF invoices and an archive; it does not transmit InvoiceNow (Peppol) invoices.
Tracking cumulative taxable turnover manually against the SGD 1 million GST registration threshold is error-prone and stressful as business grows.
Track your taxable turnover against the SGD 1 million GST registration threshold in your bookkeeping and check it with IRAS. The 4b2b products do not monitor the threshold or send alerts on their own.
Registration is generally lighter: there is no company secretary, no annual return to ACRA in the company sense, and no audit decision. Ongoing compliance is mainly your personal tax return and business name renewal. The saving is real for very small trades, but unlimited personal liability can outweigh it once you sign larger contracts or hold stock on credit.
No. Business profit is taxed as the owner's personal income at progressive individual rates, and you declare it in your annual individual tax return with IRAS. Corporate income tax at 17 % applies to companies, not to sole proprietorships. Compare the two outcomes with an adviser before choosing, because the better structure depends on your profit level.
Only if your taxable turnover exceeds the threshold, currently S$1 million, or if you choose voluntary registration. The same GST rules apply as for companies once registered, including charging 9 % on standard-rated supplies and filing returns. Monitor your turnover regularly so you do not cross the threshold without registering.
It depends on immigration status. Citizens and permanent residents can register, while non-residents face extra requirements such as a locally resident manager. Many work passes do not permit running a separate business. Confirm with MOM and ACRA what your pass allows before you file, because trading outside your permitted activity can affect your pass.
Not by a simple conversion. You incorporate a new Pte Ltd through BizFile+, transfer the business assets, contracts and staff to it, and then cease the sole proprietorship with ACRA. Tell customers and your bank about the new entity, and decide with your adviser how stock and goodwill are transferred.
Create PDF invoices and archive them. Check your InvoiceNow and GST duties directly with IRAS.
