What your electricity costs at SP Group’s tariff this quarter, where it goes, and whether a retailer’s plan would be cheaper.
For example: 361 kWh, what the average HDB 4-room flat uses a month
| 361 kWh × 28.59 cents a kWh | S$103.21 |
| GST, 9% | S$9.29 |
| Electricity, with GST | S$112.50 |
| A day, over 30 days | S$3.75 |
Unless you’ve signed up with a retailer, you pay SP Group’s regulated tariff for every kWh you use, plus 9% GST: there’s no fixed monthly charge for the electricity. From 1 October to 31 December 2026 it’s 28.59 cents a kWh before GST, 31.16 cents with GST, down 10.4% (3.32 cents) on July to September, as natural gas got cheaper.
| What’s in it, Oct–Dec 2026 | Cents a kWh |
|---|---|
| Energy costs: to the power stations, for fuel (imported natural gas) and running them; changes every quarter | 22.18 |
| Network costs: to SP Group, for the grid that brings it to you | 6.10 |
| Market support services fee: to SP Group, for meter reading, billing and the retail market | 0.23 |
| Market admin and power system operation fee: to the market and grid operators | 0.08 |
| Tariff before GST | 28.59 |
| Quarter | Before GST | With 9% GST |
|---|---|---|
| Oct–Dec 2026 | 28.59 | 31.16 |
| Jul–Sep 2026 | 31.91 | 34.78 |
| Apr–Jun 2026 | 27.27 | 29.72 |
| Jan–Mar 2026 | 26.71 | 29.11 |
| Oct–Dec 2025 | 27.55 | 30.03 |
| Jul–Sep 2025 | 27.47 | 29.94 |
| Apr–Jun 2025 | 28.12 | 30.65 |
| Jan–Mar 2025 | 28.12 | 30.65 |
| Oct–Dec 2024 | 29.10 | 31.72 |
| Jul–Sep 2024 | 29.88 | 32.57 |
| Apr–Jun 2024 | 29.79 | 32.47 |
| Jan–Mar 2024 | 29.89 | 32.58 |
Cents a kWh, for households. The energy costs follow the price of natural gas, so the tariff moves every quarter; SP Group announces the next one near the end of each quarter.
Tariff checked 2 Nov 2026, from SP Group: tariff information (this quarter and what’s in it), its historical electricity tariff (low tension, domestic) and its release of 29 Sep 2026 on the October to December tariff. A guide: your SP bill is what counts.
The average household’s electricity a month from October 2025 to September 2026, and what that comes to at this quarter’s tariff with GST:
| Home | kWh a month | Oct–Dec 2026 |
|---|---|---|
| HDB 1-room | 135 | S$42.07 |
| HDB 2-room | 179 | S$55.79 |
| HDB 3-room | 261 | S$81.34 |
| HDB 4-room | 361 | S$112.50 |
| HDB 5-room | 424 | S$132.13 |
| HDB executive | 519 | S$161.73 |
| Condo or apartment | 512 | S$159.55 |
| Terrace house | 806 | S$251.18 |
| Semi-detached house | 1,043 | S$325.03 |
| Bungalow | 2,108 | S$656.92 |
Homes use least from December to March, and more the rest of the year.
A kWh is 1,000 watts for an hour, so an appliance’s kWh a month is its watts × hours a day × 30 days ÷ 1,000. These are our rough, typical figures, not official ones: your appliance’s label, or the kWh a year on its energy label, is better.
| Appliance | Watts while on | Hours a day | kWh a month |
|---|---|---|---|
| Aircon, one room | 700 | 8 | 168 |
| Fridge (on and off all day: its average) | 45 | 24 | 32.4 |
| Water heater | 3,000 | 0.5 | 45 |
| Washing machine | 500 | 0.5 | 7.5 |
| Clothes dryer | 2,000 | 1 | 60 |
| LED light, each | 10 | 5 | 1.5 |
| Fan | 50 | 8 | 12 |
| TV | 100 | 4 | 12 |
| Computer | 100 | 4 | 12 |
| Wi-Fi router | 10 | 24 | 7.2 |
| Rice cooker | 700 | 0.5 | 10.5 |
| Kettle | 2,000 | 0.2 | 12 |
| Induction hob | 2,000 | 1 | 60 |
| Microwave | 1,000 | 0.2 | 6 |
Average use from SP Group’s average electricity consumption by home type, Oct 2025 to Sep 2026, here averaged over the 12 months (it leaves out prepaid accounts and homes on a retailer’s plan). NEA says aircon, fridge, lighting, water heater and washing machine make up about 80% of a typical home’s use: NEA’s household electricity profile.
Under the Open Electricity Market, a household can buy its electricity three ways:
Whoever you buy from, the electricity comes through the same SP Group grid, so it’s no more or less reliable. Before you sign, read the contract’s length, security deposit, early termination charges and what happens when it ends (some renew by themselves), and whether the retailer bills you itself or through your SP bill.
From the Open Electricity Market site, checked 2 Nov 2026: purchase options, making the switch and price plans. Retailers’ current prices are on its price comparison tool; we don’t list them here, as they change all the time.
From 1 October to 31 December 2026, SP Group’s household tariff is 31.16 cents a kWh with GST, or 28.59 cents before GST. That’s down 10.4% from July to September (34.78 cents with GST), because natural gas was cheaper. It changes every quarter.
The kWh you used × the tariff, then 9% GST on that. 361 kWh at 28.59 cents is S$103.21, and with S$9.29 of GST, S$112.50. SP Group’s bill has water, gas and refuse removal on it too, and an HDB household’s U-Save rebate comes off the SP bill.
On average from October 2025 to September 2026, a 3-room flat used 261 kWh a month, a 4-room 361 kWh and a 5-room 424 kWh (SP Group’s figures). At this quarter’s tariff that’s about S$81, S$113 and S$132 a month with GST. Hot months use more.
It depends on the aircon, but at about 700 watts while it runs, one room for 8 hours a night uses about 168 kWh a month: S$52.35 at this quarter’s tariff with GST. A newer inverter aircon with more ticks on its energy label uses less, an old one more.
It can save money: a discount-off-tariff plan is always cheaper than SP Group’s tariff by its percent, and a fixed-price plan is cheaper while the tariff stays above it, which isn’t certain. Compare plans on the Open Electricity Market’s price comparison tool, put one in the calculator above, and read the contract first: its length, deposit, early termination charge and renewal. The electricity itself comes through the same grid either way.
Usually because you used more kWh: on hot months, on more aircon, or on a billing period with more days in it. Check the kWh on your bill against the month before. The tariff only moves on 1 January, 1 April, 1 July and 1 October.
No. It’s all worked out in your browser, and nothing you type or pick goes into the page’s address.
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