The short answer
What a Basic Plan Information Document actually tells you
A Basic Plan Information Document, or BPID, is the standardised one-page summary an energy retailer must give you for every market plan it sells. It is meant to end the era of made-up discounts by putting every plan on the same template: the price compared to the reference price, an estimated annual cost, the tariff type, the discounts, the fees and the contract terms. It is a genuinely useful document. The trap is the part nobody explains: the big dollar figure on it, the estimated annual cost, is calculated on a model household defined by the regulator, not on how much energy you actually use. So the most prominent number on the page is often the number least likely to match your bill.
Here is the core takeaway in one line: a BPID standardises the fields so you can compare plans like for like, but its headline estimated annual cost is modelled on an average household, so use the document to compare and never to predict your own bill. The common assumption is that the big dollar figure is what you will pay. It is not. It is what a regulator-defined model household would pay, printed so the same number can sit on every retailer’s page. Read it that way and the BPID becomes a powerful comparison tool. Read it as a forecast and it quietly misleads you.
Reframe the assumption: the estimated annual cost is not “your bill on this plan”. It is “the model household’s bill on this plan”, built so two plans can be lined up fairly. Your bill depends on your usage, which the document never sees.
The blind spot
Why “just read the BPID” is incomplete advice
Most explainers tell you to find the Basic Plan Information Document and compare the estimated annual cost. That advice is not wrong, it is just shallow enough to cost you money in three predictable ways.
First, they treat the estimated annual cost as your bill. It is a model-household figure. A household that uses well above or below the model can sign up expecting one number and receive a very different one, and nothing on the document warned them.
Second, they point you at the lowest possible price without separating the conditional part. A plan can look cheapest on the BPID only because it assumes you pay on time every single month. Miss one due date and the saving evaporates, so the “cheapest” plan on paper is not the cheapest plan in practice.
Third, they ignore the benefit period. The price summarised on a BPID often applies for a fixed window. When the benefit period ends the rates can step up, so the document you carefully compared no longer describes the plan you are actually on a year later.
How the document actually works
Expert analysis: the machinery behind the BPID
Where it applies, and what Victoria calls it
The Basic Plan Information Document is required under the Australian Energy Regulator’s pricing rules in the states that run a competitive retail market under national energy law: New South Wales, South Australia, south-east Queensland, the ACT and Tasmania. Victoria runs its own scheme, where the equivalent is the Energy Fact Sheet under the Essential Services Commission’s Energy Retail Code, accessed through Victorian Energy Compare. Western Australia and the Northern Territory have no open household retail competition, so the document does not apply there in the same way. The rule of thumb: wherever you can actually switch retailer, there is a standardised plan summary, and it works the same way.
How the estimated annual cost is built
This is the heart of it. The regulator sets a model annual usage figure for each distribution zone, an assumed yearly consumption for a typical household in that area. The estimated annual cost on the BPID is what that model household would pay on the plan, combining the daily supply charge and the usage rate at the assumed consumption. The figure exists to be comparable: because every plan in your zone is costed against the same model usage, you can stand two estimates side by side and trust the difference. What it is not is a forecast of your bill, because your usage is almost never the model’s usage.
The reference price comparison is the field that travels
Alongside the dollar figure, the BPID shows how the plan compares to the reference price, the Default Market Offer in most states or the Victorian Default Offer in Victoria, as a percentage. This is the most reliable field on the page, because it is a ratio against one regulated benchmark for your zone. A plan at “18% below the reference price” is genuinely comparable with a plan at “12% below” in the same zone. The percentage survives differences in usage far better than the raw dollar estimate does.
Where retailers actually compete
Because the template is fixed, retailers cannot win on the layout, so they design around it. They compete on the parts the BPID summarises in a single line: conditional discounts that require pay-on-time or direct debit, sign-up incentives that apply once, and the benefit period after which the rate can rise. A plan engineered to show a strong “% below reference price” and a low estimated cost can still carry economics that only work if you behave like the ideal customer for twelve months. The standardisation moved the competition into the conditions, which is exactly where casual readers stop looking.
One plan, three households
The same BPID, three very different bills
One illustrative plan, costed for three households on identical rates. The BPID only ever prints the middle row, the model household. The other two never appear, yet they are just as real.
| Household | Annual usage | Usage component | Estimated annual cost |
|---|---|---|---|
| A small flat, low use | 2,000 kWh | $560 /year | $962 /year |
| The model household on the BPID | 3,900 kWh | $1,092 /year | $1,494 /year |
| A large home, high use | 6,500 kWh | $1,820 /year | $2,222 /year |
On this single plan the model household’s estimated cost is $1,494 /year, the figure the BPID would print. The small flat pays about $962 and the large home about $2,222, a spread of roughly $1,260 on the very same rates. The document cannot tell you which row is yours, only your own usage can.
What this means for real households
How misreading a BPID costs you money
The example above is not academic. It is exactly how households make the wrong call:
They take the estimated cost as a promise
A high-use family picks the plan with the lowest estimated annual cost, then opens a bill far above it and assumes the retailer cheated them. Nobody cheated. The estimate was the model household’s, and the family uses far more than the model. They compared the right field for the wrong purpose.
They compare estimates across different addresses
Someone weighing up a plan at their current home against one quoted for a friend’s place treats the two estimated costs as comparable. They are not. Different zones carry different model usage and different network charges, so the dollar estimates are built on different assumptions. Only the percentage below the reference price compares cleanly, and only within the same zone.
They bank a conditional discount they will not always earn
The plan shows a low estimated cost because it assumes every bill is paid on time. One late payment during a busy month and the conditional discount drops out, lifting the bill back toward the reference price. Households who never separate the conditional part from the guaranteed part are the ones most surprised.
They forget the benefit period ends
The estimate held for twelve months, then the benefit period lapsed and the rates stepped up. The household never re-checked, so a plan that genuinely was a good deal at sign-up quietly became an ordinary one, with the same plan name on the bill.
The insider insight
The government tools are a searchable database of every BPID, set to your usage
Here is the lever almost no one uses. The same plan data that retailers must lodge to produce their BPIDs also feeds the free government comparison tools: Energy Made Easy for the Default Market Offer states and Victorian Energy Compare for Victoria. That means the tools are not a separate, watered-down view of the market. They are the same underlying plan data, made searchable, and with one decisive difference: you can enter your own usage, or upload your actual consumption from a recent bill, and the tool recomputes every plan’s estimated cost on your numbers instead of the model household’s.
The non-obvious truth: reading BPIDs one by one means comparing model-household figures that none of them match. Running your own usage through Energy Made Easy or Victorian Energy Compare means comparing your figures across the same set of plans. The BPID is the per-plan snapshot; the government tool is the same data, re-costed for you. Use the BPID to read a single plan in detail, and the tool to rank the field on your actual consumption.
So the practical move is to stop treating the BPID’s dollar estimate as the comparison and start treating the percentage below the reference price, plus your own usage in the government tool, as the comparison. The document standardises the question; your usage is what answers it.
Grounded in the analysis
What you should actually do
Moves that follow from what a BPID really shows, and what it cannot.
Rank on the reference-price percentage, not the dollar estimate
Within your zone, the “% below the reference price” is the field that compares cleanly. Use it to shortlist, and treat the estimated annual cost as a model figure, not your bill.
Re-cost the shortlist on your own usage
Take your annual kWh from a recent bill and run it through Energy Made Easy, or Victorian Energy Compare in Victoria. It re-prices every plan on your consumption, which is the number that matters.
Read the conditions and the benefit period
Separate the unconditional discount from the conditional one, and note when the benefit period ends. Diarise that date, because a good plan can quietly become an ordinary one when it lapses.
Ready to put a shortlist together? Compare electricity plans against the reference price, or read how the reference price really works first.
Key facts, last updated 2026-06-19
How a Basic Plan Information Document works in Australia. Sources: the Australian Energy Regulator’s retail pricing rules and Energy Made Easy (energymadeeasy.gov.au), and, for Victoria, the Essential Services Commission’s Energy Retail Code and Victorian Energy Compare (compare.energy.vic.gov.au). Dollar figures on this page are illustrative; confirm a plan’s own document before relying on it.
The bottom line
Why this matters right now
With the 2026-27 reference prices landing, the Victorian Default Offer from 1 January and the Default Market Offer from 1 July, every retailer is re-cutting its plans against a new benchmark. That means the estimated annual cost and the “% below reference price” on every BPID are about to change, even where the underlying rates barely move. It is the moment a plan you were happy with can slip down the field without you noticing. So treat the Basic Plan Information Document as what it is: a standardised page that lets you read one plan in detail and compare the reference-price percentage fairly, not a forecast of your bill. Rank on the percentage, re-cost the shortlist on your own usage in the government tool, read the conditions and the benefit period, and you turn a document most people skim into the thing that actually lowers your bill.
Common questions
A Selectra expert answers your questions about the Basic Plan Information Document
It is a standardised one-page summary a retailer must give you for an energy plan. Every BPID uses the same template, so the key facts always appear in the same place: how the plan compares to the reference price, an estimated annual cost, the tariff type, conditional and unconditional discounts, any incentives, the fees and charges, and the contract length with any benefit period. The point of the standard layout is to let you line up two plans field by field instead of wading through different marketing for each.
Because it is calculated on a model household, not on your usage. The regulator sets a model annual usage figure for each distribution zone, and the estimated cost on the BPID is what that model household would pay on the plan. If you use much more energy than the model (a big family, a pool, an electric vehicle) your real bill will be higher. If you use much less (a small flat, frequent travel) it will be lower. The figure is a like-for-like comparison number between plans, not a forecast of your own bill.
Victoria runs its own scheme. The equivalent document is the Energy Fact Sheet, required under the Essential Services Commission’s Energy Retail Code and surfaced through Victorian Energy Compare. It does the same job as a BPID, comparing a plan against the Victorian Default Offer instead of the Default Market Offer. So if you are in Victoria you are reading an Energy Fact Sheet, but the way to read it is identical: treat the estimated cost as a model-household figure and run your own usage through the government tool.
An unconditional discount is built into the rate, so you get it no matter what. A conditional discount only applies if you meet a condition, usually paying on time or by direct debit. The BPID shows both, and it often shows a lowest possible price that assumes you meet every condition. If you miss a single due date, that conditional saving disappears and your bill jumps back toward the reference price. Always check how much of the headline saving is conditional before you treat it as money in your pocket.
Not in the same way. The BPID is a tool of a competitive retail market, and most households in WA and the NT cannot choose their retailer. Prices there are set by government, with Synergy as the main retailer in WA and Jacana Energy in the NT, so there is no field of market plans to compare on a standardised summary. The BPID matters where you can actually switch: New South Wales, South Australia, south-east Queensland, the ACT and Tasmania, plus Victoria through its Energy Fact Sheet.
