The main legal ways to reduce income tax in Singapore are to claim every relief you qualify for, then use the voluntary ones: CPF cash top-ups, SRS contributions and donations to approved charities. Each must be made by 31 December to count for the following year’s tax.
The saving equals your marginal tax rate on each dollar of relief. Below is a worked example on a S$120,000 salary, with what each step saves and what it costs.
How to Reduce Income Tax: Start With Reliefs You Already Qualify For
Before spending anything, check the reliefs that cost nothing. The most often missed are family reliefs:
- Parent Relief: $9,000 if a parent aged 55 or over lives with you and had annual income of no more than $8,000, or $5,500 if not living with you but you spent at least $2,000 supporting them.
- Qualifying Child Relief: $4,000 per child.
- Grandparent Caregiver Relief: $3,000 for working mothers whose parent or parent-in-law looks after a child aged 12 or under.
At an 11.5% marginal rate, a $9,000 Parent Relief is worth about $1,035 a year. Our full list of personal tax reliefs has every condition.
The Starting Point: A $120,000 Salary
Illustration only. A 40-year-old employee earns $10,000 a month in 2026, $120,000 in total, with no bonus. His mother lives with his sister, who claims Parent Relief.
| Amount | |
|---|---|
| Employment income | $120,000 |
| Less: Earned Income Relief | $1,000 |
| Less: CPF relief (20% of $96,000) | $19,200 |
| Chargeable income | $99,800 |
| Tax for YA 2027 | $5,627 |
His CPF relief is on $96,000, not $120,000, because the CPF Board’s Ordinary Wage ceiling in 2026 is $8,000 a month. Tax is $3,350 on the first $80,000 plus 11.5% on $19,800. His marginal rate is 11.5%.
The short version: Each dollar of relief saves your top marginal rate. In this example, $32,300 put into CPF, SRS and charity cuts the tax bill by $3,257, but most of that money is locked away or given away.
Step by Step: What Each Option Saves
| Step (made by 31 Dec 2026) | Relief or deduction | Chargeable income after | Tax saved |
|---|---|---|---|
| Starting point | $99,800 | ||
| 1. $8,000 cash top-up to own Special Account | $8,000 | $91,800 | $920 |
| 2. $8,000 cash top-up to mother’s Retirement Account | $8,000 | $83,800 | $920 |
| 3. $15,300 SRS contribution | $15,300 | $68,500 | $1,242 |
| 4. $1,000 donation to an approved IPC | $2,500 | $66,000 | $175 |
| Total | $3,257 |
Tax falls from $5,627 to $2,370. Two details in the maths:
- The SRS contribution crosses the $80,000 band line. $3,800 of it saves 11.5% and the remaining $11,500 saves 7%.
- The donation is deducted at 2.5 times: $1,000 given becomes a $2,500 deduction, saving 7%.
The mother’s top-up assumes she does not receive MRSS matching grants. IRAS says top-ups that attract MRSS grants do not qualify for relief.
What Each Step Costs You
Tax saved is not free money. Each option has a different catch:
| Option | Where the money goes | Can you get it back? |
|---|---|---|
| CPF top-up to yourself | Your Special or Retirement Account, earning CPF’s guaranteed interest | No; it is reserved for retirement payouts |
| CPF top-up to a parent | Your parent’s Retirement Account | No; it becomes their savings |
| SRS | Your SRS account | Yes, but withdrawals before your retirement age are fully taxed with a 5% penalty; from that age, 50% is taxed |
| Donation | The charity | No |
The SRS saving is partly a deferral. Half of each withdrawal is taxed later, although at a lower rate if your retirement income is modest. Our article on SRS tax savings vs withdrawal tax works through that trade-off.
What Does Not Work, or No Longer Works
- Course Fees Relief was discontinued from YA 2026.
- Life Insurance Relief is unavailable to most employees, because it requires compulsory CPF contributions of under $5,000 a year.
- Not declaring income is tax evasion. IRAS receives income and deduction data directly from many employers, SRS operators and charities.
- Going over the $80,000 relief cap wastes relief. Above the cap, a top-up or SRS contribution saves nothing and cannot be refunded.
Your Marginal Rate Decides the Value
The same $8,000 top-up saves very different amounts:
| Chargeable income | Marginal rate (YA 2024 onwards) | Saving on $8,000 |
|---|---|---|
| $38,000 | 3.5% | $280 |
| $60,000 | 7% | $560 |
| $100,000 | 11.5% | $920 |
| $150,000 | 15% | $1,200 |
These assume the full $8,000 stays inside the band. If your chargeable income is $20,000 or less, it is taxed at 0% and relief saves nothing now.
What To Do Next
- Find your chargeable income on your last Notice of Assessment, or estimate it with the income tax calculator.
- Check the free reliefs first, then decide whether locking up money is right for you.
- Use the CPF top-up tax relief calculator to test a top-up, and read the 31 December deadline guide for cut-offs.
- This is general information, not tax advice. For your own situation, ask IRAS or a qualified tax professional.
