A fixed price establishes a contractually defined price for a period. A price guarantee describes which changes are excluded. Without the associated contract terms, neither expression means that every component of the energy bill remains unchanged.
Check price coverage, guarantee period, volume provisions and adjustment clauses. Supply duration and price guarantee duration may differ. A professional portfolio must also consider whether new or removed supply points fall under the same agreement.
AT A GLANCE
Price coverageWhat is fixed?
PeriodHow long does the commitment apply?
ChangesWhich clauses apply?
NeoBid’s own overview.
PROPERTY PRACTICE
What does this mean for your portfolio?
Before approval, prepare a short comparison showing the fixed energy component, variable pass-through items, start and end of the commitment, and rules for demand changes. This is more useful for internal budget approval than the general label “fixed price”. Planned disposals or refurbishment should also be addressed before signing.
An example.
Our own practical example: an office portfolio fixes the energy component for two years. Its budget must still account for other billing components that remain variable under the contract. An additional heat pump may also increase volume even though the unit price is unchanged.
This is a review framework, not an interpretation of a specific supply contract. Individual clauses must be assessed against their actual wording.
WHAT MATTERS
Three questions for your portfolio.
01
Exactly what is fixed, and for which period?
02
Which adjustments remain possible?
03
How are volume and property changes handled?
Make the distinction clear ↗
Stable prices, stable volumes and stable total costs are three different things. A fixed price also does not guarantee, in hindsight, the cheapest purchasing date.
Sources reviewed: 18 September 2026 · Editorial team: NeoBid
In our first meeting, we discuss your portfolio, upcoming contract deadlines and objectives. Together, we identify useful documents and next steps. You do not need a complete dataset to get started.
