Electricity prices in Western Power (SWIS) (WA) — 2026–27
WA Government-set (Synergy) · effective 1 July 2026
Usage 33.3c/kWh · supply 119.2c/day (GST incl.) · +2.7% vs 2025–26
Perth & the south-west interconnected system · source: WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1) · annual figure is a derived estimate from the published rates
| Tariff | Daily supply | Usage | Annual |
|---|---|---|---|
| Residential (flat rate) | 119.2c/day | 33.3c/kWh | $1,766* |
* Derived estimate — published rates × 4,000 kWh + supply × 365, not a figure the regulator publishes.
Set by the WA Government in the state budget — WA sits outside the AER DMO. Two Synergy sources match to the cent. GST-inclusive.
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 →
How Western Power (SWIS) compares
| Zone | Region | Usage c/kWh | Supply c/day |
|---|---|---|---|
| Western Power (SWIS) | WA | 33.3c | 119.2c |
| Ausgrid | NSW | 33.1c | 166.2c |
| Endeavour Energy | NSW | 33.7c | 185.1c |
| Essential Energy | NSW | 35.0c | 272.2c |
| CitiPower | VIC | 26.0c | 121.1c |
| Powercor | VIC | 28.2c | 138.1c |
| United Energy | VIC | 27.4c | 119.1c |
| Jemena | VIC | 27.5c | 127.1c |
| AusNet Services | VIC | 32.0c | 128.2c |
| Energex | QLD | 28.0c | 192.0c |
| Ergon Energy | QLD | 28.9c | 180.5c |
| SA Power Networks | SA | 41.9c | 180.1c |
| Horizon Power | WA | 33.3c | 119.2c |
| TasNetworks | TAS | 28.0c | 167.7c |
| Evoenergy | ACT | 37.0c | 134.2c |
| Power and Water | NT | 31.7c | 62.5c |
Frequently asked questions
- Why is a Western Power (SWIS) bill different from other areas?
- Poles-and-wires costs differ by network. Western Power (SWIS) covers Perth & the south-west interconnected system, and its network charges are built into the WA Government-set (Synergy) figures for this zone — so the same usage costs a different amount on a neighbouring network. Compare the other WA zones or the national table below.
- Is this what I actually pay?
- This is the regulated standing rate — the default if you have never chosen a market plan. Market offers in Western Power (SWIS)'s area can price below it, so treat these rates as the benchmark your own plan should beat.
- When do these prices change?
- Every 1 July. The WA Government Standard Electricity Prices 2026–27 (Synergy Home Plan A1) applies from 1 July 2026 to 30 June 2027; the next reset is 1 July 2027. This page is re-verified against the new determination each year.
Related
Rates apply 1 July 2026 – 30 June 2027 and reset every 1 July. Figures are the government reference/standing rates for this zone — retail market offers can differ.