Statutory Income vs Assessable Income: The IRAS Order of Operations Behind Your Tax Bill
Statutory income is your total income from each source after deducting allowable expenses and capital allowances specific to that source, while assessable income is statutory income after further deducting unabsorbed losses and approved donations, the last stop before your personal reliefs are applied.
Not financial advice. All figures for educational reference only. Data as at September 2026.
Last updated: September 2026
Table of Contents
Key Takeaways
What Is Statutory Income vs Assessable Income?
How Does It Work in Singapore?
Statutory Income vs Assessable Income Example
Why Understanding the Sequence Helps You Plan
Risks and Limitations
Statutory Income vs Assessable Income vs Chargeable Income vs Total Income
The Bottom Line
Frequently Asked Questions
Key Takeaways
- IRAS calculates your tax bill in a fixed sequence: total income, then statutory income, then assessable income, then chargeable income, then tax payable.
- Statutory income is calculated separately for each income source, such as employment, rental, or trade income, before the sources are combined.
- Assessable income comes after deducting prior-year unabsorbed trade losses and approved donations, and it’s the figure your personal reliefs are subtracted from next.
- Personal reliefs, such as CPF relief or the Working Mother’s Child Relief, are deducted from assessable income to arrive at chargeable income, which is what the tax rate table actually applies to.
- Most salaried employees never see a difference between total income and statutory income, since there are usually no source-specific deductions to apply, but the distinction matters a lot for anyone with rental, trade, or investment income.
What Is Statutory Income vs Assessable Income?
Singapore’s income tax calculation runs through several named stages, and IRAS uses each term precisely, which is exactly why the terminology confuses people filing their own returns. It starts with total income, the sum of everything you earned across all sources in the year: employment, rental, trade, and so on.
From total income, IRAS calculates statutory income separately for each source. For rental income, this means deducting allowable expenses like property tax, mortgage interest, and repairs from the gross rent. For a sole proprietorship or partnership, it means deducting business expenses and capital allowances on qualifying equipment from the trade’s gross profit. The statutory income figures from each source are then added together.
The next stage is assessable income, where any unabsorbed trade losses carried forward from prior years and approved donations, typically to Institutions of a Public Character, are deducted from the combined statutory income. Only after assessable income is calculated do your personal reliefs, CPF relief, spouse relief, parent relief, and the rest, get applied to arrive at chargeable income, the figure the progressive tax rate table is actually applied to.
It helps to think of the sequence as a funnel that narrows step by step. Total income is the widest point, everything you earned. Statutory income narrows it by stripping out costs specific to earning each stream. Assessable income narrows it again for losses and giving. Chargeable income is the narrowest point, the actual number multiplied against Singapore’s progressive tax bands to produce your final bill.
How Does It Work in Singapore?
For a typical salaried employee with no rental property, no side business, and no prior-year losses to carry forward, total income, statutory income, and assessable income are usually identical figures, since there’s nothing at those intermediate stages to deduct. The distinction only becomes visible once you have a second income source or a loss to offset.
A property investor renting out a second unit sees the gap clearly: gross rental income minus deductible expenses gives statutory income from that source, which then combines with employment statutory income before assessable income and reliefs are calculated.
| Stage | What Happens | Example Deductions Applied |
|---|---|---|
| Total Income | Sum of income from all sources | None yet |
| Statutory Income | Source-specific deductions applied to each income stream | Rental expenses, capital allowances, trade expenses |
| Assessable Income | Combined statutory income, less losses and donations | Unabsorbed trade losses, approved donations |
| Chargeable Income | Assessable income, less personal reliefs | CPF relief, spouse relief, course fees relief |
| Tax Payable | Progressive resident tax rates applied to chargeable income | 0% to 24% by bracket (YA2026 rates) |
Statutory Income vs Assessable Income Example
A Singapore resident earns S$90,000 in employment income and rents out a second property for S$30,000 a year, with S$8,000 in deductible expenses (property tax, mortgage interest, agent commission) against that rental. Total income is S$120,000. Statutory income is S$90,000 (employment, no deductions available) plus S$22,000 (rental, after the S$8,000 expense deduction), giving S$112,000.
Assuming no prior-year losses and a S$1,000 approved donation (deductible at 2.5 times value, so S$2,500), assessable income is S$112,000 minus S$2,500, which is S$109,500. If total personal reliefs, including CPF relief, come to S$12,000, chargeable income is S$97,500, and that final figure is what the progressive tax bands are applied to, not the original S$120,000 total income.
Why Understanding the Sequence Helps You Plan
- It shows you exactly where deductions apply. Rental expenses and capital allowances only reduce statutory income for that specific source, they don’t offset your employment income directly.
- It clarifies why donations matter more than they look. A S$1,000 approved donation reduces assessable income by S$2,500 under the current 2.5 times tax deduction, a detail easy to miss if you only think in terms of “total income.”
- It explains why two people with the same salary can owe different tax. Differences in statutory and assessable income, not just personal reliefs, are often what separates two similar-looking tax bills.
- It makes year-end tax planning concrete. Knowing which stage a deduction hits lets you estimate the real tax saving before you commit to a donation or an expense.
Risks and Limitations
- Misreporting deductions at the wrong stage causes filing errors. Personal reliefs deducted against the wrong base, or business expenses claimed without proper documentation, can trigger IRAS queries or reassessment.
- Unabsorbed losses have conditions attached. Trade losses carried forward are only deductible against assessable income if the business ownership and trade remain substantially unchanged (the shareholding test for companies, or continuity of trade for sole proprietors).
- The terminology is easy to misuse in DIY tax planning. Conflating statutory income with chargeable income, for instance, can lead to an inaccurate estimate of your actual tax liability.
- Rental expense deductions require proper record-keeping. IRAS can disallow expenses without supporting receipts and tenancy agreements, which effectively pushes statutory income back up.
Statutory Income vs Assessable Income vs Chargeable Income vs Total Income
Each term marks a distinct stage in the same calculation, not interchangeable synonyms.
| Term | Comes After | What’s Deducted to Reach It |
|---|---|---|
| Total Income | Nothing, starting point | N/A |
| Statutory Income | Total Income | Source-specific expenses and capital allowances |
| Assessable Income | Statutory Income | Unabsorbed losses, approved donations |
| Chargeable Income | Assessable Income | Personal reliefs (CPF, spouse, parent, etc.) |
The Bottom Line
For Singapore taxpayers with more than one income source, the difference between statutory and assessable income is where most of the confusion in self-filed tax returns starts. Knowing the sequence, total, then statutory, then assessable, then chargeable, makes it much easier to see exactly where a deduction actually helps.
Frequently Asked Questions
Do salaried employees need to worry about statutory income?
Usually not directly, since employment income with no source-specific deductions means statutory income equals total income for that source. It becomes relevant once you add rental, trade, or other income streams.
What’s the difference between assessable income and chargeable income?
Assessable income is statutory income after losses and donations are deducted. Chargeable income is assessable income after personal reliefs are deducted, and it’s the final figure the tax rate table applies to.
Can rental losses offset my employment income?
Rental losses generally cannot be offset against employment income in the same way trade losses can, since rental income is typically taxed as passive income rather than a trade, subject to specific IRAS rules.
How much does an approved donation actually reduce my tax?
Approved donations are deductible at 2.5 times the donated amount against assessable income (for donations made in the applicable qualifying period), so a S$1,000 donation reduces assessable income by S$2,500.
Where can I see my own statutory and assessable income figures?
Your Notice of Assessment from IRAS shows the breakdown, and myTax Portal displays the calculation stages when you review a filed return.
Does this sequence apply to companies as well as individuals?
Companies follow a similar statutory-to-assessable-to-chargeable sequence under the Income Tax Act, though the specific deductions, such as capital allowances and group relief, differ from those available to individuals.
Related Terms
- IR8A Form Singapore
- Group Relief (Tax) Singapore
- Capital Allowances Singapore
- Tax Residency Singapore
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