Frequently Asked Questions
You're not sure where to start? Here are the most asked questions about Stax.
General Questions
What is Stax?+
Stax is a Singapore tax optimizer that helps you calculate your income tax and discover savings through SRS contributions, CPF top-ups, and tax reliefs. Unlike basic calculators, we show you exactly how much you can save with different strategies.
Is Stax free to use?+
Yes, the core tax calculator is completely free.
How accurate is Stax?+
Stax uses official IRAS tax rates for Year of Assessment 2025. Our calculations are based on Singapore's progressive tax system (0% to 24%). However, we recommend consulting a tax professional for complex situations.
Is my data safe with Stax?+
Absolutely. All calculations happen in your browser — we don't store your income or personal information on our servers. Your privacy is our priority.
Tax Calculator Questions
How do I calculate my income tax in Singapore?+
Simply enter your annual income into our Singapore tax calculator. Stax automatically applies the correct tax brackets and shows your tax payable, effective tax rate, and potential savings.
What are the Singapore tax brackets for 2025?+
- First $30,000: 0% to 2%
- Next $10,000: 3.5%
- Next $10,000: 7%
- Next $40,000: 11.5%
- Next $40,000: 15%
- Next $40,000: 18%
- Next $40,000: 19%
- Next $40,000: 19.5%
- Next $40,000: 20%
- Above $320,000: 22%
Use our calculator to see exactly how much tax you'll pay.
How much tax will I pay on $100,000 salary?+
On a $100,000 salary in Singapore, you'll pay approximately $3,350 in tax (effective rate of 3.35%) before any reliefs. With SRS contributions and CPF top-ups, you can reduce this significantly. Use our calculator to see your exact amount.
SRS (Supplementary Retirement Scheme) Questions
What is SRS and how does it reduce tax?+
SRS is a voluntary savings scheme that offers tax relief. Every dollar you contribute reduces your taxable income. You can contribute up to $15,300 per year (2025 limit), potentially saving thousands in taxes.
Is SRS worth it?+
SRS is worth it if you're in a higher tax bracket (above 11.5%). For someone earning $100,000, contributing the maximum $15,300 can save approximately $2,000 in taxes. However, withdrawals at retirement are taxed. Use our SRS calculator to see if it's right for you.
How much can I contribute to SRS?+
For 2025, the SRS contribution cap is $15,300 for Singapore citizens and PRs, and $35,700 for foreigners.
When should I contribute to SRS?+
The best time is in January each year to maximize the time your money can grow. However, contributions made by December 31 count for that tax year.
SRS vs CPF top-up: which is better?+
- CPF top-up: Locked until retirement (age 55+), earns 4-6% interest, can use for housing/medical
- SRS: Flexible investment options, can withdraw early with penalty, taxed at retirement
Use our comparison tool to see which saves you more tax.
CPF Questions
How does CPF top-up reduce tax?+
Voluntary cash top-ups to your CPF Special Account (SA) or Retirement Account (RA) qualify for tax relief. You can claim up to $8,000 for self and $8,000 for family members.
Should I top up my CPF?+
- You're in a higher tax bracket (15% or above)
- You don't need the liquidity
- You want guaranteed 4% returns
- You're comfortable with funds locked until age 55
What’s the difference between CPF SA and SRS?+
Tax Relief Questions
What tax reliefs am I eligible for?+
- Earned Income Relief (up to $8,000)
- CPF Relief (automatic)
- SRS Relief (up to $15,300)
- Parent Relief (up to $9,000 per parent)
- Course Fees Relief (up to $5,500)
- NSman Relief (for eligible individuals)
Use our relief checklist to see which ones you qualify for.
How much tax relief can I claim?+
Total personal income tax reliefs are capped at $80,000 per year. This includes all reliefs except for CPF contributions and donations.
Can I claim parent relief if my parents have income?+
No, your parents must not have an annual income exceeding $4,000 to qualify for parent relief.
For Specific Groups
How much tax do freelancers pay in Singapore?+
Freelancers pay the same progressive tax rates as employees. However, you can claim business expenses and may need to make Medisave contributions. Use our freelancer tax guide for details.
Do expats pay tax in Singapore?+
Yes, expats working in Singapore are subject to income tax. The rate depends on your tax residency status. If you stay 183 days or more, you're taxed as a resident at progressive rates. Our expat tax guide explains more.
How is my bonus taxed?+
Bonuses are taxed as part of your annual income. They're added to your salary and taxed at your marginal rate. Some employers use the "bonus method" which may result in higher withholding, but you'll get a refund if you overpaid.
Using Stax
How do I use the "what-if" simulator?+
Enter your income, then adjust the sliders for SRS contributions and CPF top-ups. Stax instantly shows how each change affects your tax payable.
Can I save my calculations?+
Free users can calculate unlimited times but can't save. Premium users can save scenarios and generate PDF reports.
Does Stax work on mobile?+
Yes, Stax is fully mobile-responsive. Calculate your tax on any device.
Still have questions?
Contact+
Contact us at hello@stax[.]sg