Plenty of Permanent Residents keep a full-time job while building something of their own on the side, and running a side business Singapore style is very doable if you set it up thoughtfully. As a PR you have the freedom to register and run a business, which most work-pass holders do not enjoy without the right approvals. The trick is to start on the right foot: check that you are actually allowed to under your current job, register properly, keep your side income clean for tax, and avoid letting it bleed into your day job. This guide is a general orientation, not legal or tax advice, so verify the current rules with ACRA, IRAS and MOM before you act.
If you are moving from mainland China, the mindset may feel familiar. Many people there run a small online shop or freelance gig alongside their main work. Singapore is just as open to it, but the systems, from registration to tax, are more formal and worth learning early.
Check Your Employment Contract First
Before anything else, read your employment contract. This is the step people most often skip and most often regret. Many Singapore contracts contain a moonlighting or exclusivity clause that restricts outside work, or a conflict-of-interest clause that bars you from competing with or moonlighting for a rival of your employer. Some require you to declare or seek approval for outside business.
Ignoring such a clause can put your main job at risk, which is a poor trade for a side hustle. If your contract is unclear:
- Ask your HR department in writing what is and is not allowed.
- Avoid any side business that competes with your employer or uses their time, tools or confidential information.
- Keep your side work strictly outside working hours.
Employment terms sit under the Employment Act and are enforced between you and your employer, so MOM and TAFEP resources give the general framework, but your own contract is the document that governs you. When in doubt, get it clarified before you register anything.
Registering the Business
Once you are clear to proceed, you generally register your business with the Accounting and Corporate Regulatory Authority (ACRA). Even a modest side venture usually needs to be registered if you are trading under a business name. Registration gives you a legitimate business name, lets you open a business bank account, and signals to customers and suppliers that you are the real thing.
Some very small activities carried out under your own name may not require registration, but the moment you adopt a trading name or the activity looks like an ongoing business, registration is expected. ACRA’s own portal sets out what needs registering, the current fees and the renewal cycle, so check there rather than relying on hearsay.
Sole Proprietor or Company: The Basic Decision
A common early question is whether to run your side business as a sole proprietorship or to incorporate a company. In general terms:
| Side-business step | What to do |
|---|---|
| Check eligibility to trade | Read your employment contract; clarify moonlighting rules with HR |
| Choose a structure | Decide sole proprietor (simple, cheaper) vs company (separate legal entity, more admin) |
| Register with ACRA | Register the business name or incorporate; confirm current fees on ACRA’s portal |
| Check for licences | Verify with the relevant authority whether your activity needs a licence or permit |
| Handle tax | Declare side income to IRAS; keep records of income and expenses |
| Keep it separate | Use a separate bank account and do the work strictly outside your job |
A sole proprietorship is the simplest and cheapest to set up and run, but it is not a separate legal entity, so you and the business are legally the same and your personal assets are exposed. A private limited company is a separate legal entity that can limit personal liability and may look more established, but it carries more setup cost and ongoing compliance work. Which fits depends on your risk, scale and ambitions. Our dedicated guide on registering a company with ACRA goes deeper into the company route.
Licences for Certain Activities
Registering the business is not always the end of the paperwork. Certain activities need a specific licence or permit before you can legally operate. Food businesses, for instance, deal with the Singapore Food Agency; other trades answer to their own regulators. Selling home-cooked food, offering tuition, running events, or dealing in regulated goods can all carry extra requirements.
Do not assume your idea is exempt. Use GoBusiness or the relevant authority to check whether a licence applies to your specific activity, and sort it out before you start trading rather than after a customer complaint.
Tax on Side Income and Keeping It Separate
Side income is still income, and IRAS expects you to declare it. A few principles keep you on the right side of the line:
- Declare your side income. Profit from your side business (income minus allowable expenses) is taxable and goes into your personal income tax filing with IRAS, on top of your salary.
- Keep proper records. Save invoices, receipts and bank statements. Good records make filing painless and back you up if IRAS ever asks.
- Separate your money. Open a dedicated bank account for the business. Mixing personal and business funds makes tax time a nightmare and blurs your books.
- Separate your time and tools. Do not run the side hustle on your employer’s time, laptop or premises. Keeping a clean boundary protects both your job and your business.
Tax rules, allowable expenses and filing deadlines are all defined by IRAS and can change, so use their official guidance or a qualified accountant. This is general information, not financial advice.
Common Low-Cost Side Businesses
If you are still deciding what to do, plenty of PRs start with low-cost, low-overhead ideas that fit around a full-time job:
- Online reselling or a small e-commerce shop.
- Freelance skills such as design, writing, translation, photography or coding.
- Tutoring or coaching in a subject you know well.
- Handmade goods, baking or craft sold at markets or online.
- Consulting or advisory work in your professional field, provided it does not clash with your employer.
Start lean, test demand before you spend heavily, and grow only once the numbers make sense. A side business that stays small and steady is a perfectly good outcome, and it keeps the pressure off your main income while you learn.
Explore More
Thinking bigger than a sole proprietorship? Read our guide to registering a company with ACRA for when incorporation makes sense. And if you would rather go all in on working for yourself, freelancing and self-employment as a PR in Singapore covers MediSave, invoicing and income tax for the fully self-employed.