Most Singapore employers know, in broad strokes, that CPF contributions on bonuses don’t go on forever — there’s a ceiling. What trips people up isn’t the concept. It’s a specific, easy-to-miss moment when that ceiling actually needs to be recalculated — and if you get it wrong, CPF Board holds you responsible for the shortfall, not the employee.
What the Additional Wage Ceiling Actually Is
Your employee’s monthly salary is their Ordinary Wage (OW). Bonuses, commissions, and other one-off payments are Additional Wages (AW). CPF is payable on AW too — but only up to a ceiling, calculated per employee, per employer, per year:
AW Ceiling = $102,000 − Total Ordinary Wages (OW) subject to CPF for the year
For 2026, the monthly OW ceiling is $8,000. So for an employee earning $8,000 or more a month, their AW ceiling works out to $102,000 − ($8,000 × 12) = $6,000 for the year. Any bonus paid beyond that $6,000 doesn’t attract CPF — which is exactly why employers assume, reasonably, that the calculation is a one-time thing they can set and forget.
It isn’t.
The Moment Most Employers Miss
CPF Board’s own guidance is explicit: the AW ceiling has to be recalculated in the employee’s last month of employment, or in December — whichever comes first. Right up until that point, employers are only working with an estimate based on projected full-year salary.
Here’s why that matters. Say an employee earning $8,000 a month resigns in August. Using the standard full-year estimate, their AW ceiling would be $6,000. But CPF Board’s own worked example shows the real calculation at resignation is different: $102,000 − ($8,000 × 8 months actually paid) = $38,000 — a far higher ceiling than the full-year estimate assumed.
If that employee received a bonus earlier in the year and the employer only ever applied the $6,000 estimate, the employer has under-contributed — potentially by tens of thousands of dollars in AW that should have been subject to CPF. That shortfall doesn’t disappear when the employee leaves. It’s still owed, and it’s the employer’s obligation to catch it and pay it — CPF Board doesn’t send you a reminder.
It’s Not Just Resignations
The same recalculation trap applies any time an employee’s Ordinary Wage changes mid-year — a raise, a pay cut, a role change, or someone re-joining the company after having left earlier in the year. Each of these resets the math, because the ceiling is based on actual OW paid, not the OW rate you started the year assuming.
If your payroll process calculates the AW ceiling once, at the start of the year, and never revisits it, that process has a gap.
What to Actually Check
You don’t need to memorise the formula. You need a process that flags recalculation at the right moments:
- Whenever someone’s OW changes — raise, pay cut, or a change in role that affects base pay.
- In an employee’s final month of employment, before their last payslip and CPF contribution are finalised.
- In December, for anyone whose AW ceiling hasn’t already been settled through the year.
CPF Board provides an AW ceiling calculator that handles the arithmetic — the part that actually causes problems is remembering when to run it again.
Not sure whether your payroll process is catching these recalculation triggers? Get in touch — we’re happy to help you check.
