Singapore AWS Bonus Calculator

No. The Annual Wage Supplement is a variable payment made according to the terms of your employment contract, not a statutory entitlement under the Employment Act. MOM's own guidance confirms it is not required by law, which is exactly why there is no single official way to prorate it for someone who joins or leaves partway through the year.

Because AWS is contractual rather than statutory, employers use different formulas and both are common in practice: a daily method based on days worked out of 365, and a completed-months method based on months worked out of 12. Rather than pick one silently, this calculator shows both so you can compare them and see how much they diverge.

Neither method is officially correct; which one applies depends entirely on what your employment contract or company policy says. Some employers use the daily method, some use completed months, and some round differently again. Check your contract, staff handbook, or ask HR which formula your employer actually uses.

Method A multiplies your full AWS amount, which is your monthly basic salary times the AWS multiplier, by the number of eligible days you worked divided by 365. This method gives credit for partial months and is generally more precise for mid-month joiners or leavers.

Method B multiplies your full AWS amount by the number of completed months you worked divided by 12. This method only counts whole months, so a partial month you worked but did not complete is typically not credited, which can make it less generous than the daily method for someone who joins mid-month.

The multiplier expresses your AWS as a number of months of basic salary, most commonly 1.0 for a standard 13th month payment. Some employers pay more or less than a full month, for example 0.5 or 1.5, depending on company performance or contract terms, so adjust the multiplier to match your own agreement.

This calculator uses your monthly basic salary as the base for the full AWS amount, which is the most common contractual basis. Some employers may define AWS differently, for example including fixed allowances. Check your contract or staff handbook for the exact definition your employer uses.

No. This tool computes both common proration methods from the figures you enter; it does not tell you which one your employer should use or recommend any course of action. It is not financial or employment-law advice. For a figure you will rely on, check your employment contract, ask your employer, or consult mom.gov.sg.