Singapore Utility Bill Calculator

SP Group's regulated tariff is charged per kilowatt-hour (kWh) of electricity used. For July to September 2026, the tariff is 31.91 cents per kWh before GST and 34.78 cents per kWh with GST included. Multiply your monthly usage in kWh by the rate to estimate your electricity cost for that quarter.

SP Group revises the regulated electricity tariff every quarter to reflect changes in fuel and other costs. Because of this, any rate quoted here, or anywhere else, is only accurate for the quarter it applies to. Always check spgroup.com.sg for the tariff of the current quarter before relying on a bill estimate.

SP Group publishes the regulated tariff as four components: the energy cost (the cost of generating electricity), the network cost (transporting it through the grid), the Market Support Services Fee, and the Market Administration and Power System Operation Fee. This calculator uses the combined published rate rather than estimating a split between them.

PUB charges water in two tiers per month: the first 40 cubic metres at a lower rate, and any usage above 40 cubic metres at a higher rate. Only the excess above 40 cubic metres is charged at the higher tier rate, the first 40 cubic metres always get the lower rate no matter how much you use in total. This works the same way income tax bands do.

Each cubic metre of water is charged as three components: the water tariff itself, the Water Conservation Tax (a percentage of the tariff meant to discourage overuse), and a waterborne fee that funds used-water treatment. These rates changed on 1 April 2025 and are shown separately in the calculator's breakdown.

Yes. Singapore's 9% GST applies on top of both the electricity tariff and the water tariff. This calculator shows each utility before and after GST, plus a combined total, so you can see exactly how much of your bill is GST.

This calculator only estimates the usage-based tariff charges. It doesn't include fixed charges some retailers apply, meter reading timing differences, wastewater or other government fees billed separately, or usage from a different quarter's tariff. If you're on the Open Electricity Market with a retailer other than SP Group, your rate will differ from the SP-regulated tariff used here.

It's a reasonable planning estimate using officially published rates, not a substitute for your actual bill. Treat it as a way to sanity-check a bill or estimate a new home's running costs, not as financial advice, and always compare it against your real SP Group or PUB statement.