CPF
CPF OA Interest Ceiling Singapore
The CPF OA interest ceiling in Singapore refers to the cap on the additional 1% interest paid on the first SGD 20,000 in the Ordinary Account. The base OA rate is 2.5% p.a., and the extra 1% on the first SGD 20,000 gives members an effective 3.5% on that portion — but only up to the SGD 20,000 ceiling.
CPF OA Interest: Two Components
1. Base rate: 2.5% p.a. — guaranteed minimum on all OA balances. 2. Extra 1% p.a. on the first SGD 20,000 in OA — the “ceiling” is this SGD 20,000 cap. Amounts above SGD 20,000 earn only the base 2.5% p.a. Always verify with CPF Board.
How Interest Is Calculated
For SGD 30,000 in OA: first SGD 20,000 earns 3.5% p.a. = SGD 700; remaining SGD 10,000 earns 2.5% p.a. = SGD 250; total = SGD 950 p.a. Members aged 55+ receive an additional 1% on the first SGD 30,000 of combined CPF balances.
Ordering of Accounts for Extra 1%
The extra 1% applies to the first SGD 60,000 of combined balances, in order: first SGD 20,000 in OA, then SA, then MA balances — up to SGD 60,000 combined cap. CPF Board calculates this automatically.
CPF OA vs T-Bills in 2026
As at Q1 2026, Singapore 6-month T-bill yields are approximately 3.0–3.3%. The 3.5% effective rate on the first SGD 20,000 in OA is competitive, with the added benefit of being guaranteed and liquid. Use the T-Bill, SSB and Fixed Deposit Comparison Calculator.
Strategies to Maximise CPF OA Interest
1. Maintain at least SGD 20,000 in OA to capture the full extra 1% interest. 2. OA-to-SA transfer (before age 55) — SA earns 4% p.a. but transfer is irreversible. Use the CPF OA-SA Allocation Calculator. 3. CPFIS-OA investments in SGX-listed REITs and Singapore Savings Bonds — use the CPFIS Calculator for breakeven analysis. See the CPF Investment Strategy Guide.