By MoneyBees
Estimate your monthly electricity bill at SP Group's regulated tariff of 31.16 cents per kWh with GST (28.59 cents before GST) for 1 Oct to 31 Dec 2026. Start from your bill, your home type or your appliances, then compare an Open Electricity Market plan you have been quoted.
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SP bill, with GST
$121.95
391 kWh a month
Vs last quarter
-$14.16
at 34.78 cents with GST
After U-Save
$71.95
Oct to Dec 2026 credit spread over 3 months
391.3 kWh x 28.59 cents = $111.88 before GST. 9% GST adds $10.07, so the electricity part of your bill is $121.95. Water, gas and refuse charges on the same SP bill are not included.
Your flat's U-Save for October 2026 is $150, about $50.00 a month across the quarter. It is credited to your SP account and also offsets a retailer's electricity bill.
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| Energy costs | 22.18 |
| Network costs | 6.10 |
| Market Support Services fee | 0.23 |
| Market admin and Power System Operator fee | 0.08 |
| Tariff before GST | 28.59 |
| With 9% GST | 31.16 |
SP Group sets the energy cost part each quarter from natural gas prices in the first two and a half months of the quarter before. For 1 Oct to 31 Dec 2026 it fell by 3.32 cents, a 10.4% drop from 31.91 cents before GST.
| Home | kWh a month | Bill |
|---|---|---|
| HDB 1-room | 145.92 | $41.72 |
| HDB 2-room | 195.47 | $55.88 |
| HDB 3-room | 284.64 | $81.38 |
| HDB 4-room | 391.33 | $111.88 |
| HDB 5-room | 460.73 | $131.72 |
| HDB executive | 563.49 | $161.10 |
| Condo or apartment | 545.72 | $156.02 |
| Terrace house | 844.17 | $241.35 |
| Semi-detached house | 1070.40 | $306.03 |
| Bungalow | 2162.40 | $618.23 |
An HDB 4-room flat uses 391.33 kWh a month on SP Group's average. At 28.59 cents that is S$111.88 before GST, and S$121.95 with 9% GST. Last quarter, at 31.91 cents, the same use cost S$124.87 before GST, so the bill is S$12.99 lower before GST. A retailer quote of 25 cents per kWh before GST would make it S$106.63 with GST, or S$15.32 a month less, until SP's tariff moves again.
Figures checked 3 Oct 2026.
From 1 October to 31 December 2026, SP Group's regulated household tariff is 28.59 cents per kWh before GST, or 31.16 cents with 9% GST. That is 3.32 cents, or 10.4%, lower than the July to September 2026 tariff of 31.91 cents before GST.
Every quarter. SP Group reviews it under guidelines from the Energy Market Authority. The energy cost part follows natural gas prices in the first two and a half months of the quarter before.
Multiply the kWh you used by the tariff, then add 9% GST. An HDB 4-room flat using SP Group's average of 391.33 kWh pays S$111.88 before GST and S$121.95 with GST this quarter.
SP Group's averages per month are 145.92 kWh for an HDB 1-room flat, 284.64 kWh for 3-room, 391.33 kWh for 4-room, 460.73 kWh for 5-room, 545.72 kWh for a condo or apartment and 844.17 kWh for a terrace house.
It depends on the price you are quoted and on where SP's tariff goes next. A fixed price stays the same for the contract while SP's tariff moves every quarter. Enter the quote here and check it against the current tariff before you sign. This page does not recommend any retailer.
Yes. U-Save is first used on SP Group's non-electricity charges such as water, gas and refuse. Whatever is left goes to your electricity bill from the retailer. HDB households get double the usual U-Save in FY2026.
Watts x hours a day x days, divided by 1,000, gives kWh. A 1,000 W air-conditioner used 8 hours a day for 30 days uses 240 kWh, which costs about S$74.80 with GST at this quarter's tariff.
SP Group bills in cents. The calculator rounds the charge before GST to the cent, works 9% GST on that and rounds again, then adds the two.
These calculators provide general estimates for educational purposes only and are not personalised financial advice. Results may rely on rates and rules that change over time, so verify against official sources (IRAS, CPF Board, HDB, MAS) or consult a licensed financial adviser before making decisions.
Junxiong-WFG Organisation is an authorised representative of AIA Financial Advisers Private Limited (Reg. No. 201715016G).