Singapore Income Tax Calculator (IRAS)

Enter Calculation

Chargeable Income (SGD per year)

Results

Income Tax Payable

S$3,350

per year

Chargeable Income	S$80,000
Income After Tax	S$76,650
Effective Tax Rate	4.19%

What Is the Singapore Income Tax Calculator?

This calculator applies to Singapore tax residents and uses the Inland Revenue Authority of Singapore (IRAS) progressive personal income tax rates effective from Year of Assessment (YA) 2024. Enter your annual chargeable income — your total income after deductions, reliefs and rebates — to estimate the income tax payable. Note: this tool does not apply to non-residents, who are taxed at flat rates.

How to Use It

Simply enter your chargeable income (in SGD) for the year. The calculator allocates your income across the IRAS tax brackets and computes the tax owed in each, then sums them to give your total tax payable, your income after tax, and your effective tax rate.

How the Formula Works

Singapore uses a progressive system: the first S$20,000 is tax-free, the next S$10,000 is taxed at 2%, and so on up to a top marginal rate of 24% on income above S$1,000,000. Each slice of income is taxed only at its bracket's rate — not your whole income at the top rate. Total tax is the sum of (income within each bracket × that bracket's rate).

$$\text{Tax} = \sum_{i} \left( \min\!\left(\text{Income},\, U_i\right) - L_i \right)^{+} \times r_i$$

where:

$$\left\{ \begin{aligned} L_i, U_i &= \text{lower/upper bound of bracket } i \\ r_i &= \text{IRAS rate for bracket } i \\ (x)^{+} &= \max(x, 0) \\ \text{Net} &= \text{Income} - \text{Tax} \\ \text{Eff. Rate} &= \dfrac{\text{Tax}}{\text{Income}} \times 100\% \end{aligned} \right.$$

Each income slice is taxed at its own bracket rate under Singapore's progressive system.

Worked Example

For a chargeable income of S$80,000: the first S$20,000 is taxed at 0% (S$0); the next S$10,000 at 2% (S$200); the next S$10,000 at 3.5% (S$350); and the next S$40,000 at 7% (S$2,800). Total tax = $$\text{S\$0} + \text{S\$200} + \text{S\$350} + \text{S\$2,800} = \textbf{S\$3,350}$$ giving an effective rate of about 4.19%.

A worked example: income is sliced at bracket thresholds and each slice taxed separately.

FAQ

Is the first S$20,000 really tax-free? Yes — under IRAS resident rates the first S$20,000 of chargeable income is taxed at 0%.

What is chargeable income? It is your assessable income minus allowable deductions and personal reliefs. Enter that figure, not your gross salary.

Does this include CPF or non-resident rates? No. This estimates resident income tax only. CPF contributions, non-resident flat rates, and rebates are not included.