How we calculate savings benchmarks
Every savings message marked with a superscript number is based on a transparent benchmark calculation and should be read as an estimate, not a guaranteed result.
The same logic is used across all savings claims
We keep the benchmark process simple, repeatable, and comparable across bill types.
Start with published prices and tariff terms
We use rates and terms that are publicly available at the benchmark reference point.
Estimate annual household cost
Costs are annualised so current and alternative tariffs can be compared on a like-for-like basis.
Measure the gap against the lower-cost option
Savings are the difference between the current cost path and the lowest relevant alternative.
Core formula
Estimated annual savings = current annual cost - lowest comparable annual cost.
Reference values used in current site claims
These values provide context for headline savings claims. Personal outcomes vary based on bill details and timing.
Energy benchmark: £260/year
Estimated from a January 2026 comparison between the Ofgem default tariff cap and the cheapest equivalent fixed tariff benchmark.
Broadband benchmark: £183/year
Estimated from typical in-contract versus out-of-contract pricing gaps, including common post-introductory price increases. Unlike the other benchmarks on this page, this one is our own estimate across a range of provider price lists rather than a single published figure, so there is no one source link to point at — treat it as the most directional of the four.
Mobile benchmark: £304/year
Estimated from mid-range SIM-only price paths that include published annual in-contract price-rise models.
Direct debit benchmark: £143/year
Not a Taupia estimate: this is Ofgem's own published figure for the difference between paying by standard credit and paying by direct debit, given in its 27 May 2026 price cap announcement as a saving of around £143 on a typical bill. It applies without changing supplier, and it is a payment-method differential rather than a switching saving, so it is not added to the energy benchmark above. Ofgem restates it at each cap announcement, so it can move.
Primary sources
- Ofgem energy price cap
- The Energy Shop fixed price energy guide
- SIM-only mobile prices 2026-2031
- Ofgem: energy price cap will rise 13% from July (27 May 2026)
Energy benchmark input values: £1,758 default cap versus £1,497.66 cheapest benchmark tariff (January 2026 reference point).
How we model mobile non-switching over time
Mobile benchmark claims assume a stay-put path unless the user switches or renegotiates.
The model starts from a representative mid-range SIM-only baseline and applies annual step-up increases that reflect common in-contract pricing structures.
Confirmed provider pricing disclosures are treated as factual inputs. Longer-horizon years use clearly marked scenario assumptions.
This avoids implying infinite price rises while still reflecting the cumulative cost of inaction.
Your own number will be different
Benchmarks are directional. Your actual savings depend on your real bill data and available deals at that moment.
- Current tariff type and contract status
- Usage profile and allowance mix
- Supplier terms, fees, and location-specific availability
- Market prices at the time your switch is evaluated
Common questions about savings claims
What does a superscript number next to savings mean?
It marks a benchmark estimate. The number is a representative reference value and not a guarantee of your personal outcome.
How are personalised savings calculated?
Taupia compares your current tariff and usage profile against lower-cost options available at the time of evaluation. Savings are the cost difference.
Why might my savings be higher or lower than the benchmark?
Real savings vary by usage, contract terms, standing charges, location, and which deals are available when you switch.