Statute Details
- Title: Income Tax (Relief and Deduction under Section 39) Rules 2021
- Act Code: ITA1947-S1028-2021
- Legislation Type: Subsidiary legislation (SL)
- Authorising Act: Income Tax Act (Cap. 134), specifically powers under section 7(1)
- Commencement: 1 January 2022
- Current status: Current version as at 27 March 2026
- Key amendments noted in extract: Amended by S 280/2025 with effect from 25 April 2025
- Key provisions (from extract): Rules 1 to 8 (including definitions and multiple “maximum relief” and “specified amount” calculation rules)
- Primary legislative interface: Income Tax Act (section 39) and Central Provident Fund Act 1953 (including retirement and special account concepts)
What Is This Legislation About?
The Income Tax (Relief and Deduction under Section 39) Rules 2021 (“Section 39 Rules”) are subsidiary rules made under the Income Tax Act to operationalise how certain tax reliefs and deductions under section 39 of the Income Tax Act are calculated and limited. In practical terms, the Rules translate the broad policy in section 39 into precise computational steps—especially where deductions depend on payments made to a Central Provident Fund (CPF) “retirement account” and/or “special account”, and where those payments are made for a related member (or, in some cases, for the claimant’s own accounts).
Although the Income Tax Act sets out the entitlement framework, it is the Section 39 Rules that specify the maximum relief amounts, the specified amounts that count for deduction purposes, and the limits that prevent double counting or excessive claims. The Rules also define key terms by reference to CPF legislation—ensuring that tax calculations align with CPF account mechanics.
The Rules are therefore highly relevant to practitioners advising on tax computations for individuals who make CPF-related payments and claim deductions under section 39, including scenarios involving related members and transitional arrangements introduced by later amendments.
What Are the Key Provisions?
Rule 1 (Citation and commencement) confirms that the instrument is the “Income Tax (Relief and Deduction under Section 39) Rules 2021” and that it comes into operation on 1 January 2022. This matters for determining which computational framework applies to claims for years of assessment from that date onward.
Rule 2 (Definitions) is foundational. It defines terms used throughout the Rules by reference to the CPF system and the Income Tax Act. Key definitions include:
- “claimant”: an individual who claims a deduction under section 39(3) or section 39(3A) of the Income Tax Act for a year of assessment.
- “member”: an individual to whose credit amounts stand in CPF, or for whom CPF accounts are maintained.
- “related member”: a member related to the claimant in the ways specified in section 39(3) of the Income Tax Act.
- “retirement account”, “retirement sum” and “special account”: meanings drawn from the Central Provident Fund Act 1953.
- “basic healthcare sum”: the amount directed under section 13(6) of the CPF Act.
- “prevailing retirement sum”: meaning given by regulations under the CPF Retirement Sum Topping-Up Scheme.
Rule 2(2) further clarifies that the “retirement sum that has been set aside by a member at any time” is determined according to the CPF Retirement Sum Topping-Up Scheme Regulations. This ensures that tax relief calculations track the CPF regulatory determination of retirement sums.
Rule 2A (Prescribed transitional amount) (inserted/updated by the 2025 amendment) introduces a transitional computation for certain years of assessment: 2026, 2027, 2028 and 2029. It prescribes a formula for the “prescribed transitional amount” in respect of an individual for purposes of section 39(2)(hb) of the Income Tax Act.
In plain language, Rule 2A addresses a policy transition involving “platform operators” and “Group A workers” under the CPF Fourth Schedule. It computes a transitional amount as (A − B) × C, where:
- A and B are percentages of APE (aggregate platform earnings) relevant to CPF contribution computations, but with different reference points (December 2029 vs the preceding year, and different assumptions about age/birth date).
- C is the total APE as a Group A worker for each calendar month in the year immediately preceding the year of assessment.
For practitioners, the key takeaway is that transitional relief is not a simple fixed amount; it is a formula-driven figure tied to CPF contribution percentage assumptions and the individual’s platform earnings history.
Rules 3 to 5 (Maximum relief and specified amounts) form the core computational machinery for deductions under section 39(3) and section 39(3A). The Rules distinguish between:
- payments made to a retirement account (Rules 3 and 4), and
- payments made to a special account (Rules 3 and 5).
Rule 3 (Applicable maximum relief amount) sets out how to compute the applicable maximum relief amount depending on the claimant’s year of assessment and the number of payments made in the preceding year. For year of assessment 2023 or subsequent years, it provides:
- For section 39(3)(c)(i): the maximum relief amount is A + B, where A is derived from Rule 4 (retirement account) and B from Rule 5 (special account).
- For section 39(3A)(c)(i): the maximum relief amount is C + D, again combining retirement-account and special-account specified amounts.
The Rules also require the practitioner to identify whether the claimant made only one payment or more than one payment in the preceding year, because the specified amounts in Rules 4 and 5 differ depending on that fact pattern.
Rule 4 (Specified amount for payment to retirement account) provides the “countable” amount for retirement account payments. The specified amount is the lower of:
- the actual payment amount; and
- the amount by which the prevailing retirement sum at the time of payment exceeds the retirement sum already set aside immediately before that payment.
For multiple payments, Rule 4(2) requires summing an amount E for each payment, where each E is again the lower of the payment amount and the incremental gap between prevailing retirement sum and the retirement sum set aside immediately before that payment.
Rule 5 (Specified amount for payment to special account) similarly limits the countable amount for special account payments. For one payment, the specified amount is the lower of:
- the payment amount; and
- the maximum amount prescribed in the CPF (Topping-Up of Special Account) Regulations that applies to the member, determined immediately before the payment.
For multiple payments, Rule 5(2) requires summing an amount F for each payment, with each F again being the lower of the payment amount and the applicable CPF special-account topping-up maximum at the time.
Rule 6 (Applicable maximum relief amount for section 39(3)(c)(ii)) begins to set out another category of maximum relief for section 39(3) (and similarly for section 39(3A) in later rules). The extract truncates the remainder, but the structure indicates that Rule 6 will provide a separate computation method—likely tied to different components or conditions within section 39(3)(c)(ii). In practice, practitioners should consult the full text of Rules 6 to 8 (not included in the extract) to determine the correct maximum relief formula and deduction limits for the relevant sub-clauses.
Rule 8 (Deduction limits) is identified in the enacting formula list as dealing with deduction limits for section 39(3)(d) and section 39(3A)(d). This indicates that beyond “maximum relief amounts”, the Rules impose additional caps that may depend on the nature of the payment and the CPF account status at the time of payment.
How Is This Legislation Structured?
The Section 39 Rules are structured as a short set of computational rules:
- Rule 1: citation and commencement.
- Rule 2: definitions, including cross-references to CPF concepts and the Income Tax Act.
- Rule 2A: transitional amount formula for specified years (2026–2029) linked to platform earnings and CPF contribution percentage assumptions.
- Rules 3–5: the main “maximum relief amount” framework, combining specified amounts for retirement account and special account payments, with different treatment for one vs multiple payments in the preceding year.
- Rules 6–8: additional maximum relief computations and deduction limits for other sub-clauses within section 39(3) and section 39(3A).
Overall, the Rules operate like a calculation schedule: identify the claimant and the relevant payments in the preceding year, determine the prevailing CPF retirement sum and applicable special-account topping-up maximums at the time of each payment, then apply the statutory caps and maximum relief formulas.
Who Does This Legislation Apply To?
The Rules apply to individuals who claim deductions under section 39(3) or section 39(3A) of the Income Tax Act. These claimants must have made qualifying payments in the relevant period (notably the preceding year) to CPF accounts—either to their own accounts or, in the “related member” context, to the CPF accounts of a related member.
The Rules also apply indirectly to CPF members whose retirement sums and special-account topping-up capacities determine the “specified amounts” that are eligible for tax deduction purposes. Because the Rules rely on CPF regulatory determinations (prevailing retirement sum; maximum special-account topping-up amounts), practitioners must treat CPF account status and timing as legally relevant facts for tax computation.
Why Is This Legislation Important?
For tax practitioners, the Section 39 Rules are important because they determine the quantum of deductible amounts and impose hard limits that can materially affect tax outcomes. Even where a claimant has made substantial CPF-related payments, the Rules can restrict the countable amount to the incremental gap to the prevailing retirement sum (for retirement account payments) or to the applicable special-account topping-up maximum (for special account payments).
From an enforcement and compliance perspective, the Rules also reduce ambiguity by requiring practitioners to apply formula-based maximum relief computations that depend on objective facts: the number of payments in the preceding year, the timing of each payment, and the CPF regulatory maximums prevailing immediately before each payment. This makes the Rules particularly relevant for advising on documentation and evidence (e.g., payment records, CPF statements showing prevailing retirement sums and account status at the time of payment).
Finally, the inclusion of Rule 2A demonstrates that the tax relief framework is responsive to broader CPF policy changes—particularly those involving platform workers and transitional arrangements. Practitioners advising individuals affected by such transitions must ensure that the correct transitional formula is applied for the relevant years of assessment (2026–2029), rather than assuming the general deduction rules apply uniformly.
Related Legislation
- Income Tax Act (Cap. 134) — in particular section 39 and the rule-making power in section 7(1)
- Central Provident Fund Act 1953 — definitions and CPF account concepts (retirement account, retirement sum, special account) and related provisions (e.g., section 13(6))
- Central Provident Fund (Retirement Sum Topping-Up Scheme) Regulations — definition of “prevailing retirement sum”
- Central Provident Fund (Topping-Up of Special Account) Regulations — definition of the maximum amount prescribed in regulation 7(1)
Source Documents
This article provides an overview of the Income Tax (Relief and Deduction under Section 39) Rules 2021 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the official text for authoritative provisions.