Statute Details
- Title: Income Tax (Maximum Relief Amount for Payments to Retirement Account and Special Account) Rules 2018
- Act Code: ITA1947-S577-2018
- Legislation Type: Subsidiary Legislation (SL)
- Authorising Act: Income Tax Act (Cap. 134), section 7(1)
- Commencement: 17 September 2018
- Current Version: Current version as at 27 Mar 2026
- Key Provisions: Rules 1–5 (definitions; maximum relief amount; specified amounts for retirement account and special account)
- Relevant Income Tax Provisions: Section 39(3) and section 39(3A) of the Income Tax Act
- Related CPF Instruments: Central Provident Fund Act (Cap. 36); CPF Retirement Sum Topping-Up Scheme Regulations (Cap. 36, Rg 3); CPF (Topping-Up of Special Account) Regulations (Cap. 36, Rg 37)
- Amendment Noted in Timeline: Amended by S 1027/2021 with effect from 1 January 2022
What Is This Legislation About?
The Income Tax (Maximum Relief Amount for Payments to Retirement Account and Special Account) Rules 2018 (“the Rules”) set out how to calculate the maximum tax deduction (tax relief) that an individual claimant can obtain when making certain payments into Central Provident Fund (CPF) accounts. In practical terms, the Rules translate CPF “topping-up” concepts into a tax computation framework.
The Rules operate in conjunction with the Income Tax Act, which provides deductions for payments made to a person’s CPF accounts in specified circumstances. Specifically, section 39(3) and section 39(3A) of the Income Tax Act allow deductions for payments made to a claimant’s or related persons’ CPF accounts (depending on the statutory pathway). The Rules then cap the deduction by prescribing a maximum relief amount and defining how that maximum is computed.
Although the Rules are relatively short, they are highly technical. They require practitioners to identify (i) the relevant year of assessment, (ii) whether the deduction is under section 39(3) or section 39(3A), (iii) whether payments are made to the retirement account and/or the special account, (iv) whether payments are made once or multiple times in the preceding year, and (v) how the “prevailing retirement sum” and CPF topping-up limits apply at the time of each payment.
What Are the Key Provisions?
Rule 1 (Citation and commencement) provides the formal commencement date: the Rules come into operation on 17 September 2018. This matters for determining which tax computations fall within the Rules’ regime, particularly where payments and claims span different years.
Rule 2 (Definitions) is essential because it anchors the tax computation to CPF concepts and to the Income Tax Act’s definitions. Key defined terms include:
- “claimant”: an individual who claims a deduction under section 39(3) or (3A) of the Income Tax Act in a year of assessment.
- “member”: an individual to whose credit an amount is standing in CPF, or for whom a CPF account is maintained.
- “payment under section 39(3A)”: a payment made by the claimant (or the claimant’s employer on the claimant’s behalf) to the claimant’s retirement account or special account.
- “preceding year”: the year immediately before the year of assessment for which the deduction is claimed.
- “prevailing retirement sum”: defined by reference to the CPF (Retirement Sum Topping-Up Scheme) Regulations (Cap. 36, Rg 3).
- “related member”: a member related to the claimant in the ways specified in section 39(3) of the Income Tax Act.
Rule 2(2) further clarifies that the retirement sum set aside by a member at any time is determined in accordance with the CPF Retirement Sum Topping-Up Scheme Regulations. This is a reminder that the tax computation is not self-contained; it depends on CPF regulatory mechanics.
Rule 3 (Maximum relief amount) is the core of the Rules. It prescribes the maximum relief amount for deductions claimed for years of assessment 2017 and subsequent years up to and including 2022. The maximum relief amount is calculated using a formula that depends on whether the deduction is claimed under section 39(3) or section 39(3A), and on whether there was one payment or multiple payments in the preceding year.
For section 39(3) deductions (Rule 3(1)), the maximum relief amount is A + B, where:
- A is the specified amount for payments to the retirement account of a related member in the preceding year; and
- B is the specified amount for payments to the special account of a related member in the preceding year.
Rule 3(1) distinguishes between cases where the claimant made only one payment versus more than one payment to the relevant account(s) of one or more related members.
For section 39(3A) deductions (Rule 3(2)), the maximum relief amount is C + D, where:
- C is the specified amount for payments to the claimant’s retirement account in the preceding year; and
- D is the specified amount for payments to the claimant’s special account in the preceding year.
Again, the computation depends on whether there was only one payment or multiple payments in the preceding year.
Rule 4 (Specified amount for payment to retirement account) determines the “A” or “C” component. It uses a “lower of” approach that effectively caps the deductible amount by reference to the prevailing retirement sum and the retirement sum already set aside by the member immediately before each payment.
Where there is only one payment (Rule 4(1)), the specified amount is the lower of:
- the amount of the payment; 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.
Where there are multiple payments (Rule 4(2)), the specified amount is the sum total of an amount “X” for each payment. For each payment, “X” is the lower of:
- the amount of that payment; and
- the amount by which the prevailing retirement sum at the time of that payment exceeds the retirement sum set aside immediately before that payment.
This “per-payment” approach is significant: it prevents a claimant from effectively “double counting” capacity to top up beyond the retirement sum threshold as it changes over time.
Rule 5 (Specified amount for payment to special account) performs the analogous function for the “B” or “D” component. It also uses a “lower of” approach, but the cap is tied to the CPF topping-up limit for the special account.
For only one payment (Rule 5(1)), the specified amount is the lower of:
- the amount of the payment; and
- the maximum amount prescribed in regulation 7(1) of the CPF (Topping-Up of Special Account) Regulations that applies to the member, determined immediately before that payment.
For multiple payments (Rule 5(2)), the specified amount is the sum of “Y” for each payment, where each “Y” is the lower of:
- the amount of that payment; and
- the maximum amount prescribed under regulation 7(1) applicable immediately before that payment.
As with Rule 4, the per-payment determination is crucial for practitioners advising on timing and structuring of CPF top-ups to ensure the tax deduction is maximised within the statutory cap.
How Is This Legislation Structured?
The Rules are structured as a short set of five rules:
- Rule 1: Citation and commencement.
- Rule 2: Definitions that connect the tax relief rules to CPF account terminology and to the Income Tax Act’s deduction provisions.
- Rule 3: The formula for the maximum relief amount, split into retirement account and special account components, and split again by whether the deduction is under section 39(3) or section 39(3A).
- Rule 4: How to compute the specified amount for payments to the retirement account (including single vs multiple payment scenarios).
- Rule 5: How to compute the specified amount for payments to the special account (including single vs multiple payment scenarios).
Notably, the Rules do not create the underlying deduction right; they only define the maximum relief amount for the relevant CPF payment deductions under the Income Tax Act.
Who Does This Legislation Apply To?
The Rules apply to individual claimants who claim deductions under section 39(3) or section 39(3A) of the Income Tax Act for years of assessment up to and including 2022. The claimant must be an individual; corporate taxpayers are not within the defined “claimant” concept for these specific relief computations.
For section 39(3) claims, the Rules also require attention to related members—members who are related to the claimant in the ways specified in section 39(3) of the Income Tax Act. For section 39(3A) claims, the focus is on payments made to the claimant’s own retirement account and special account (including payments made by an employer on the claimant’s behalf).
Why Is This Legislation Important?
From a practitioner’s perspective, the Rules are important because they provide the mathematical cap on tax relief. Even where a claimant makes substantial CPF top-up payments, the deduction is limited by the Rules’ specified amounts, which depend on prevailing CPF thresholds and limits at the time of each payment.
In practice, the Rules require careful fact-finding and documentation. A tax computation will need to identify the number of payments made in the preceding year, the timing of each payment, the relevant CPF “prevailing retirement sum” at each payment date, the retirement sum already set aside immediately before each payment, and the applicable special account topping-up maximum under the CPF (Topping-Up of Special Account) Regulations. Without this, it is difficult to verify the maximum relief amount and to defend the computation in the event of a tax query.
Finally, the Rules’ temporal scope—covering deductions for years of assessment 2017 to 2022—means practitioners must confirm whether a claim falls within the covered period. The amendment effective from 1 January 2022 (S 1027/2021) also signals that the computation methodology may have been updated for that timeframe, reinforcing the need to use the correct version of the Rules for the relevant year of assessment.
Related Legislation
- Income Tax Act (Cap. 134): section 7(1) (power to make rules); section 39(3) and section 39(3A) (deductions for CPF-related payments)
- Central Provident Fund Act (Cap. 36): establishes CPF and defines key account concepts
- Central Provident Fund (Retirement Sum Topping-Up Scheme) Regulations (Cap. 36, Rg 3): defines “prevailing retirement sum” and retirement sum set aside mechanics
- Central Provident Fund (Topping-Up of Special Account) Regulations (Cap. 36, Rg 37): regulation 7(1) prescribes the maximum amount for special account topping-up
Source Documents
This article provides an overview of the Income Tax (Maximum Relief Amount for Payments to Retirement Account and Special Account) Rules 2018 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the official text for authoritative provisions.