Singapore Side Hustle Tax Implications Calculator 2026 — IRAS Marginal Rate, MediSave on Freelance Income, Deductible Expenses & Net Hourly Take-Home

Yes. IRAS treats all side hustle, freelance, and gig income as trade income that must be declared on your annual tax return using Form B. This applies whether you earn from Grab driving, Upwork freelancing, Carousell selling, tuition, or any other activity carried on for profit. The income is added to your employment salary and taxed at the progressive rate on the combined total. There is no separate lower rate for side income.

Your side hustle income sits on top of your employment salary for tax purposes. If your salary already puts you in the 7 percent bracket (40,000 to 80,000 dollars chargeable income), every dollar of side hustle profit is taxed at 7 percent. If your combined income pushes you into the 11.5 percent bracket (80,000 to 120,000 dollars), the additional hustle income in that bracket is taxed at 11.5 percent. This calculator shows exactly how much additional tax your hustle generates.

IRAS allows deduction of expenses wholly and exclusively incurred in producing the trade income. Common deductions include home office costs (proportion of rent, utilities, internet), equipment and tools, transport costs related to the hustle, professional subscriptions and software, marketing expenses, mobile phone costs attributable to business use, and accounting fees. You must retain receipts for 5 years. IRAS may audit if your expense ratio seems unusually high.

Yes if your annual Net Trade Income exceeds 6,000 dollars. Self-employed persons must contribute to MediSave based on their age and NTI. For those aged 35 and below, the rate is approximately 4 percent of NTI, capped at 5,760 dollars per year. This is in addition to the CPF contributions your employer already makes on your salary. The MediSave contribution is not deductible for income tax purposes.

Only if your taxable turnover exceeds 1,000,000 dollars per year. For the vast majority of side hustlers, GST registration is not required. However, if your side hustle revenue approaches 800,000 dollars annually, you should start monitoring closely. Once you exceed the threshold, you must register within 30 days and begin charging 9 percent GST on your services. Voluntary registration is possible below the threshold but rarely beneficial for small side hustles.

File using Form B (not Form B1 which is for employment-only income). Report your side hustle income under the Trade, Business, Profession or Vocation section. If your revenue is 200,000 dollars or less, use a 2-line statement (revenue and adjusted profit or loss). If over 200,000 dollars, use a 4-line statement (revenue, gross profit, allowable expenses, adjusted profit or loss). Filing deadline is 15 April for paper or 18 April for e-filing via myTax Portal with Singpass.

The Platform Workers Act took effect on 1 January 2025 and requires mandatory CPF contributions for platform workers (ride-hail drivers like Grab and delivery riders like Deliveroo and foodpanda) aged below 30. In 2025, the platform operator contributes 3.5 percent and the worker contributes 2.5 percent of net earnings. These rates increase annually, reaching full CPF rates (17 percent employer, 20 percent employee) by 2029. Workers aged 30 and above on 1 January 2025 can opt in voluntarily.

The net take-home depends on your marginal tax rate and MediSave obligations. A person earning 80,000 dollars from employment who makes an additional 24,000 dollars from a side hustle (after expenses) will pay approximately 2,760 dollars in additional tax (at 11.5 percent marginal rate) plus approximately 960 dollars in MediSave, keeping approximately 20,280 dollars or about 1,690 dollars per month net. This calculator shows your exact net monthly and hourly figures.

Almost always yes, because Singapore tax rates are globally low. Even at the highest marginal rate of 24 percent (income above 1,000,000 dollars), you keep 76 cents of every dollar earned. For most side hustlers in the 7 to 15 percent brackets, you keep 85 to 93 cents per dollar. The key metric is your net hourly rate after tax and MediSave. If your side hustle pays 30 dollars per hour gross and you keep 26 dollars net, compare that against what else you could do with that time.

Incorporating a Private Limited company makes sense only if your annual side hustle profit consistently exceeds approximately 100,000 dollars. The corporate tax rate is 17 percent flat but with the startup exemption scheme (75 percent exemption on first 100,000 dollars), the effective rate on the first 100,000 dollars is about 4.25 percent. However, incorporation adds compliance costs (annual filing, audit requirements, secretary fees of 500 to 2,000 dollars per year) that outweigh the tax benefit for smaller side hustles.

Yes. IRAS requires all self-employed persons to maintain proper business records for at least 5 years from the relevant Year of Assessment. Records include invoices issued and received, bank statements, expense receipts, contracts, and a summary profit and loss statement. Digital records (scanned receipts, spreadsheets) are acceptable. Failure to maintain records can result in IRAS estimating your income at a higher figure and assessing tax accordingly.

Non-declaration of income is a serious offence under Singapore tax law. IRAS has data-matching capabilities with banks, platforms, and other agencies. Penalties include a fine of up to 200 percent of the tax undercharged, plus prosecution for wilful evasion that can result in fines of up to 50,000 dollars or imprisonment of up to 3 years or both. IRAS regularly conducts audits on individuals with multiple income sources. Voluntary disclosure before detection typically results in reduced penalties.

Your employment CPF contributions are unaffected by side hustle income. CPF is calculated only on your employment salary (OW ceiling 8,000 dollars per month). However, side hustle income triggers a separate MediSave obligation if your annual Net Trade Income exceeds 6,000 dollars. This MediSave contribution goes into your CPF MediSave Account but does not qualify for the additional CPF employer matching or the CPF Annual Limit of 37,740 dollars.

Yes, if you work from home for your side hustle. You can claim a proportion of your rent or housing costs, utilities (electricity, water, internet), and maintenance costs based on the area used and time spent. For example, if you use a room that is 15 percent of your flat area for 20 hours per week (approximately 12 percent of total hours), you can deduct roughly 15 percent of 12 percent of your housing costs. The deduction is small but legitimate and adds up over a year.

Three strategies maximise your after-tax side hustle income. First, track and claim every legitimate expense (most side hustlers leave 2,000 to 5,000 dollars per year in unclaimed deductions). Second, consider voluntary CPF top-ups from your hustle profits to get the Retirement Sum Topping-Up tax relief of up to 8,000 dollars (saving 920 to 1,920 dollars at 11.5 to 24 percent marginal rates). Third, time large equipment purchases in the year you expect the highest income to maximise the deduction benefit.

You enter your monthly employment take-home salary, monthly side hustle gross income, monthly deductible expenses, weekly hours spent on the hustle, and your personal tax reliefs. The calculator computes your combined assessable income, applies IRAS YA2026 progressive tax rates, and isolates the additional tax caused specifically by the side hustle income. It also calculates MediSave obligations, the effective tax rate on your hustle, net monthly take-home, and the net hourly rate so you can assess whether the hustle is financially worthwhile for the time invested.