How to Calculate Singapore Income Tax: A Step-by-Step Guide
Calculates resident individual income tax from YA2024 onwards using Singapore's progressive rates from 0% to 24%.
Singapore's tax system is simple by global standards, but the progressive bands, reliefs and the 9% GST still trip people up. A quick calculation helps you set aside the right amount before IRAS sends your notice of assessment, or check that a bill has been worked out correctly.
What you need
- Chargeable income for the year (S$)
Step by step
- Enter the chargeable income for the year (S$).
- The results update as you type, or press Calculate.
- Read the income tax payable first, then the supporting figures below it.
The formula
Tax is charged band by band: the first S$20,000 at 0%, the next S$10,000 at 2%, the next S$10,000 at 3.5%, then 7%, 11.5%, 15%, 18%, 19%, 19.5%, 20%, 22%, 23% and 24% above S$1 million.
Worked example
For example, with these inputs:
- Chargeable income for the year (S$): 60,000
the calculator returns:
- Income tax payable: S$1,950.00
- Effective tax rate: 3.25%
- Marginal tax rate: 7.00%
- Monthly equivalent: S$162.50
A second example
Now change the inputs to:
- Chargeable income for the year (S$): 75,000
the calculator returns:
- Income tax payable: S$3,000.00
- Effective tax rate: 4.00%
- Marginal tax rate: 7.00%
- Monthly equivalent: S$250.00
Practical tips
- Set aside a little each month so the tax bill is not a shock, or sign up for GIRO instalments with IRAS.
- Personal income tax relief is capped at S$80,000 a year in total.
- Non-residents cannot claim personal reliefs, which is why their effective rate is usually higher.
- Keep receipts and records for at least five years in case IRAS asks for them.
Background
Tax planning in Singapore is mostly about timing and reliefs rather than complex structures. Topping up CPF, contributing to SRS and claiming every relief you qualify for can lower your marginal rate band, and the savings are larger for higher earners.
Reliefs lower chargeable income before rates apply. Common ones include earned income relief, CPF relief for employee contributions, parent and handicapped parent relief, working mother's child relief, NSman relief, course fees relief, and relief for SRS contributions and CPF cash top-ups. Total personal reliefs are capped at S$80,000 a year.
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.
Related calculations
- Service Charge & GST Calculator: Restaurant bills in Singapore often show '++': a 10% service charge, then 9% GST on the subtotal.
- 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.
Want to skip the arithmetic? The free Singapore Income Tax Calculator does all of this instantly and updates as you type.
Run your own numbers: Singapore Income Tax Calculator