Salary Income Tax in Singapore: 5 Mistakes to Avoid
Estimates a resident employee's annual income tax from monthly salary and bonus, allowing for CPF relief and earned income relief. The maths is not complicated, but a handful of errors come up again and again in this and related tax & gst calculations. Here is what to watch for.
The Goods and Services Tax rose from 8% to 9% on 1 January 2024. Businesses with taxable turnover above S$1 million must register, and GST-registered retailers must quote prices to consumers inclusive of GST, so most shelf prices already include it.
You are generally a tax resident if you are a citizen or PR who normally lives here, or a foreigner who has stayed or worked in Singapore for at least 183 days in the calendar year. Non-residents do not get personal reliefs and are taxed differently, which is why residency status matters so much for expatriates.
1. Calculating GST on the menu price only
With '++' pricing, GST is charged on the food plus the service charge.
2. Forgetting reliefs
Earned income relief, CPF relief and other reliefs reduce chargeable income before the rates apply.
3. Adding GST to a GST-inclusive price
Retail prices shown to consumers already include GST. To find the GST inside, multiply by 9/109, not 9%.
4. Assuming non-residents pay resident rates
Non-resident employment income is taxed at the higher of 15% or resident rates, without reliefs.
5. Applying the top rate to all income
Singapore tax is progressive: each band is taxed at its own rate, so your effective rate is well below your marginal rate.
The correct method
Chargeable income = annual gross − employee CPF (relief capped at S$37,740) − earned income relief (S$1,000 below 55). Tax then follows the resident rate bands.
For example, with these inputs:
- Monthly salary (S$): 5,000
- Annual bonus (S$): 10,000
- Age (years): 30
the calculator returns:
- Gross annual income: S$70,000.00
- CPF relief: S$14,000.00
- Estimated chargeable income: S$55,000.00
- Estimated income tax: S$1,600.00
- Effective rate on gross: 2.29%
- Annual cash after CPF and tax: S$54,400.00
Only CPF relief and earned income relief are included. Add other reliefs (parent, NSman, course fees, SRS) to lower the figure.
Related calculations
- SRS Tax Savings Calculator: Shows how much tax you save by contributing to the Supplementary Retirement Scheme.
- CPF Cash Top-Up Tax Relief Calculator: Estimates the tax saved from Retirement Sum Topping-Up: up to S$8,000 for yourself and S$8,000 for family members.
- Rental (Lease) Stamp Duty Calculator: Calculates stamp duty on a tenancy agreement of four years or less at 0.4% of the total rent.
- Singapore Income Tax Calculator: Calculates resident individual income tax from YA2024 onwards using Singapore's progressive rates from 0% to 24%.
The Salary Income Tax Estimator applies the formula consistently, so it is a quick way to double-check your own working.
Run your own numbers: Salary Income Tax Estimator