By The Big Buy desk · Last verified 28 September 2026
Singapore’s regulated electricity tariff is set every quarter and follows the cost of natural gas. For July to September 2026 it reached a record 34.78 cents per kWh including GST, 17 per cent higher than the quarter before. At that rate, a 4-room HDB flat using about 388 kWh a month pays roughly S$135. You can stay on SP Group’s tariff or switch to one of the Open Electricity Market retailers, who offer fixed-price or discount-off-tariff plans. Your supply, meter and reliability don’t change either way.
Quick facts
- July to September 2026: 34.78 cents per kWh with GST, a record.
- The tariff is reviewed every quarter and tracks natural gas prices.
- A 4-room flat using 388 kWh pays about S$135 a month at that rate.
- About ten retailers compete on the Open Electricity Market.
- Switching is optional and can be done at any time.
- SP Group still delivers the power, whoever you buy from.
How is the tariff set?
SP Group reviews the regulated tariff every quarter, and the Energy Market Authority approves it. Most of Singapore’s power comes from natural gas, so the tariff follows gas prices. With fuel prices driven up by the conflict in the Middle East, the tariff rose from 27.27 cents per kWh before GST for April to June 2026 to a record high for July to September. The rate for October to December is announced at the end of September, so check SP Group’s latest figure.
What does the Open Electricity Market offer?
| Plan type | How it works | Suits |
|---|---|---|
| Fixed price | The same rate per kWh for the whole contract, often 12 or 24 months | People who want certainty about their bill |
| Discount off the regulated tariff | A fixed percentage below SP’s tariff, moving every quarter | People happy with a changing rate, as long as it’s below the tariff |
| Non-standard plans | Peak and off-peak rates, green plans, or plans with extra charges | Read the terms closely |
The official price comparison tool lets you compare the standard plans side by side.
How much could switching save?
It depends on the plan and on where the tariff goes next. One analysis of July to September 2026 found a 4-room household could pay about S$105 a month on a cheaper retailer plan, against about S$135 on SP’s tariff. A fixed price that beats the tariff today could be dearer if the tariff falls later.
The WahLiao Verdict
Compare before you sign, and look at the plan type as well as the headline rate. A discount-off-tariff plan always keeps you below SP’s rate. A fixed price is a bet on where gas prices go, so check the exit fee before you take it.
Questions people ask
Will switching affect my supply?
No. SP Group runs the grid and delivers electricity to every home, whichever retailer you choose.
Do I have to switch?
No. There’s no deadline, and staying on SP’s tariff is fine.
Do U-Save rebates still apply if I switch?
U-Save is credited to your SP Services utilities account; ask your retailer how it’s applied to your bill.
How often does the tariff change?
Every quarter: January, April, July and October.
Sources: Dollars and Sense on the July to September 2026 tariff and the April to June 2026 tariff; MyNiceHome on standard price plans; SingSaver, Open Electricity Market guide.
Read next: GST Voucher and U-Save Rebates · Back to The Big Buy
For what’s worth it this week, with the bill shown, read The WahLiao Week.
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