Your Synergy bill explained: every line item decoded

Most Perth households receive a Synergy electricity bill every two months. Most people glance at the total and pay it. But the bill contains useful information about your consumption patterns, your tariff status, and potential billing errors. Here's what each section means.

The account summary section

The front page shows your:

• Account number — your unique Synergy account identifier
• Billing period — the dates covered (typically 60 days for residential accounts)
• Current charges — what you owe for this billing period
• Previous balance and payments — confirms your last payment was received
• Amount due and due date — when and how much to pay

What to check: Confirm the billing period dates are approximately two months. An unusually short or long billing period (because a meter reader visit was delayed or missed) can cause the bill amount to look very high or low. If the period is abnormal, the total is not directly comparable to previous bills.

The meter reading section

This section shows:

• Previous read — the meter reading at the start of the billing period
• Current read — the meter reading at the end
• Units consumed — the difference (kWh for electricity)
• Read type — actual (physical meter read), estimated (no meter access), or self-read

What to check:

• If the read type is "estimated," your bill is based on Synergy's modelled estimate, not your actual consumption. Contact Synergy to provide an actual read if you think the estimate is significantly wrong.
• Compare kWh consumed to the same period in the prior year. A 20–30% increase without a lifestyle change warrants investigation (new appliance, hot water system issue, possible meter error).

Smart meter customers: If you have a smart meter, reads are transmitted automatically. The billing period is still 60 days but each day's consumption is recorded. You can access this data through Synergy's online portal.

The supply charge

A fixed daily charge regardless of how much electricity you use. Sometimes called the "standing charge" or "service to property" charge.

Current rate (A1 and Midday Saver): Approximately $1.1062/day (check your bill for the exact current figure — it adjusts with annual tariff reviews).

In a 60-day bill: 60 × $1.1062 = approximately $66.37 supply charge

The supply charge is unavoidable while you have a grid connection. It covers your share of the network infrastructure. Solar doesn't reduce the supply charge.

The consumption charge(s)

For A1 (standard domestic tariff) customers:

• A single rate applies to all electricity consumed: 33.2621 cents/kWh (from 1 July 2026)
• All consumption at one rate, regardless of time of day

For Midday Saver (Smart Home Plus) customers, three rates appear:

• Super off-peak (9am–3pm): 8.8511 cents/kWh
• Peak (3pm–9pm): 55.3290 cents/kWh
• Off-peak (9pm–9am): 24.3384 cents/kWh

Your bill shows total kWh consumed in each period multiplied by the applicable rate.

What to check: Add up the total kWh across all rate periods. Confirm it matches the "units consumed" from the meter reading section. Calculate what percentage of your consumption falls in each period — if you're on Midday Saver, high peak (3–9pm) consumption indicates room to shift loads to super off-peak.

The GST line

Goods and Services Tax (10%) applies to all electricity charges in Australia. The bill shows the pre-GST subtotal and the GST amount separately.

The total "amount due" is the GST-inclusive figure.

The DEBS section (if you have solar)

If you have solar panels connected to the grid under the Distributed Energy Buyback Scheme (DEBS), the bill includes:

• Export kWh in peak (3pm–9pm) — credited at 10 cents/kWh
• Export kWh in off-peak (other hours) — credited at 2 cents/kWh
• Total DEBS credit — the dollar credit applied to your bill

What to check: Compare export kWh to your solar monitoring app's export figure. Small discrepancies are normal (meter precision, timing differences). Large discrepancies (>10%) are worth querying with Synergy.

If you're on REBS (Renewable Energy Buyback Scheme, the old flat 7.135c/kWh rate), the bill shows your total export kWh multiplied by the REBS rate.

The Household Electricity Credit (HEC)

The State Government's Household Electricity Credit provides eligible residential customers with a credit on their electricity bills. The credit amount and eligibility criteria are set by the WA Government.

How it appears: A credit line reducing your total charges. It's applied automatically if you're eligible — no application required for existing accounts.

The electricity concession (if eligible)

Holders of certain Commonwealth concession cards (Pensioner Concession Card, Health Care Card, DVA Gold Card) receive the WA Electricity Concession — a discount on the supply charge and consumption charges. It appears as a percentage reduction on the applicable charges.

What to check: If you hold an eligible concession card and the concession doesn't appear on your bill, contact Synergy to register your card details.

Average daily use figure

The bill typically shows "average daily use in kWh" for the current period and the same period last year. This normalises for billing period length.

What to check: A significant increase in average daily use (e.g. 25kWh/day up from 18kWh/day in the same season) warrants investigation. Common causes: new appliance, solar system not generating (inverter failure), hot water system element failure (causing continuous draw), or a meter error.

Understanding your consumption trends

Most Synergy bills include a consumption graph showing your usage over the past 12 months. This helps identify seasonal patterns:

• Summer (December–February): typically highest in Perth due to air conditioning
• Winter (June–August): elevated hot water heating, less air conditioning
• Shoulder seasons (March–May, September–November): typically lowest consumption

If your consumption graph shows an unusual spike that doesn't align with seasonal patterns, investigate potential appliance faults.

Common billing errors to check for

1. Estimated reads: bill marked "estimate" when actual reads are expected monthly/bi-monthly
2. Concession not applied: eligible concession holder not receiving discount
3. Wrong tariff code: check your tariff code matches your agreement (A1 vs Smart Home Plus)
4. DEBS credit not appearing: solar system connected but no export credit on the bill (possible metering issue)
5. Unusual supply charge calculation: verify 60-day period × daily rate matches the supply charge billed

Upload your Synergy bill to BillWise and we'll automatically decode the key numbers, model tariff alternatives, and identify your biggest savings opportunities.