Electricity prices in Western Australia — 2026–27
WA Government-set (Synergy) · effective 1 July 2026
Reference rates for Western Australia, GST inclusive. Rates moved +2.7% at 1 July 2026.
Source: WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1)
| Zone | Covers | Usage c/kWh | Supply c/day | Typical annual |
|---|---|---|---|---|
| Western Power (SWIS) | Perth & the south-west interconnected system | 33.3c | 119.2c | $1,766* |
| Horizon Power | Regional & remote Western Australia | 33.3c | 119.2c | $1,766* |
* Derived estimate — published rates × 4,000 kWh/year; the regulator publishes rates, not an annual figure.
WA at the 1 July 2026 reset
- At the 1 July 2026 reset every WA network's reference price rose: Horizon Power +2.7% and Western Power (SWIS) +2.7%. The biggest fall nationally was AusNet Services (−8.4%).
- WA's 2 networks charge the same rates: $1,766 a year at 4,000 kWh on either.
- Western Power (SWIS), the network used for WA averages on this site, ranks 8th of 16 networks nationally at 4,000 kWh (1st is cheapest; CitiPower at $1,481).
| Network | Usage c/kWh | Supply c/day | Reference bill a year | Change |
|---|---|---|---|---|
| Horizon Power WA | 33.3c | 119.2c | — | +2.7% stated |
| Western Power (SWIS) WA | 32.4c → 33.3c | 116.1c → 119.2c | $1,718 → $1,766 at 4,000 kWh | +2.7% (+$47) |
Western Power (SWIS): both years’ published supply and usage rates, priced at the stated usage. Horizon Power: WA Government uniform tariff (Horizon A2 mirrors Synergy A1) (the 2025–26 per-kWh rates are not shown). Arrows run from 2025–26 to 2026–27; GST included.
Electricity bill estimator
Western Power (SWIS)A 2-person household uses roughly 4,000–5,500 kWh a year.
- Supply charge (119.2c/day × 365)
- $435.23
- Usage (33.3c/kWh × 4,000 kWh)
- $1,330.48
Rates: WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1), effective 1 July 2026 (GST inclusive). This is the government reference/standing rate for Perth & the south-west interconnected system — market offers can sit below it. Full Western Power (SWIS) price breakdown →
Everything WA on one page
- Average bill$2,098/yr2-person household, derived from the AER benchmark
- Feed-in tariffDEBS — state buyback scheme (Synergy/Horizon)
- Is solar worth it?Payback calculator pre-set for WA
- Solar rebatesSTC discount + WA schemes
Frequently asked questions
- Who sets electricity prices in WA?
- WA Government-set (Synergy) sets the reference/standing rates shown here (WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1)). Retail market offers price against that benchmark — they can be cheaper, and the reference figure is what your plan should beat.
- What does electricity cost per kWh in WA?
- It depends on your distribution zone — usage rates run from 33.3c to 33.3c/kWh across WA's 2 networks (table above).
- When do these prices change?
- Every 1 July. The 2026–27 rates apply 1 July 2026 – 30 June 2027; this page re-verifies against each new determination.
Related
- Synergy — Home Plan (A1) standard pricesverified
- AER residential consumption benchmarks 2020stated basis
Average-bill figures are derived estimates (benchmark kWh × the Western Power (SWIS) reference rate) — labelled, never presented as a survey.