CPF Special Account Interest in Singapore: Your Questions Answered
These are the questions people ask most often about cpf special account interest. Each answer is short; follow the links for the full detail.
What does a cpf special account interest calculation tell me?
Projects Special Account growth at the 4% floor rate.
What is the formula?
Future value with monthly compounding: B(1+r)^n + m((1+r)^n − 1)/r.
What do I need to enter?
Current SA balance (S$), Monthly contribution (S$), Years, Interest rate (%).
Are these figures exact?
They follow the published CPF and MOM formulas, but your employer's payroll may round slightly differently or include allowances in a different way. Your payslip is the final reference.
Can you show an example?
For example, with these inputs:
- Current SA balance (S$): 30,000
- Monthly contribution (S$): 300
- Years: 15
- Interest rate (%): 4
the calculator returns:
- Projected SA balance: S$128,436.20
- Interest earned: S$44,436.20
Any tips?
- CPF rates drop in steps after age 55, so check which age band applies from the month after your birthday.
- Remember the S$8,000 monthly Ordinary Wage ceiling from January 2026: salary above it does not attract CPF.
- Overtime eligibility depends on your salary and role under Part IV of the Employment Act, not just your job title.
Background
The Central Provident Fund is Singapore's mandatory savings scheme for citizens and permanent residents. Contributions are shared between employee and employer and flow into the Ordinary Account for housing, education and investment, the Special Account for retirement, and MediSave for healthcare. Because the money is locked up for specific purposes, many people underestimate how much of their total pay it represents.
Total compensation in Singapore is more than the number on your offer letter. Employer CPF, variable bonuses, the Annual Wage Supplement (often called the 13th month) and benefits all add value, and comparing offers on take-home pay alone can hide meaningful differences.
Contribution rates fall as workers get older, to keep older workers employable while their retirement savings continue to grow. The Government has been raising rates for workers above 55 in stages since 2022, with the latest change in January 2026 and another planned for 2027, so figures for senior workers change more often than for younger employees.
Related calculations
- CPF Allocation Calculator (OA, SA, MA): Shows how each month's 37% CPF contribution is split between your Ordinary, Special and MediSave accounts by age group.
- Overtime Pay Calculator (MOM): Uses the Ministry of Manpower formula to work out the hourly basic rate and overtime pay for employees covered by Part IV of the Employment Act.
- Monthly to Hourly Rate Calculator: Converts a monthly salary into the hourly rate MOM uses for overtime and deductions.
- Daily Rate of Pay Calculator: Finds the daily rate of pay used for public holiday work, rest days and unpaid leave deductions.
Try it yourself with the CPF Special Account Interest Calculator.
Run your own numbers: CPF Special Account Interest Calculator