Our Impact Calculator gives an early, indicative estimate of the value a behaviour-change programme can create for your organisation — in pounds saved and in environmental outcomes. It was developed in partnership with Northumbria University and is built entirely on published UK data and evidence from our own client programmes. It is designed to under-promise: every assumption is chosen to be cautious, so real results are more likely to exceed the estimate than fall short.
the methodHow the estimate is built
For each type of saving we follow the same simple, four-part calculation:
Start with your baseline
We estimate your organisation's total annual energy, waste, water, travel and staff costs from your headcount, using recognised per-person figures.
Apply a modest reduction
We apply a small percentage reduction for each area — taken from real, measured results on our existing client programmes, not aspiration.
Scale to your sign-up rate
The more people who join, the greater the impact. We scale the result by your expected sign-up rate against a benchmark of 21%. For council resident programmes the benchmark is 5%, scaled in a straight line so that every registered resident is credited the same saving, and capped at twice the benchmark.
Adjust for duration
Engagement builds over the first year, so we phase the savings across your programme length rather than assuming full impact from day one.
Put simply: your baseline × a cautious, evidence-based reduction × your sign-up rate × your programme length.
the outcomesWhat we measure
The calculator estimates savings across seven areas, plus engagement figures that are drawn directly from our platform data:
- Energy — reduced electricity use and cost
- Waste — less waste sent for disposal
- Carbon — avoided CO₂e emissions
- Water — reduced water & wastewater use
- Business travel — lower travel spend
- Wellbeing activities — fewer sick days from healthier habits
- Morale & retention — lower staff turnover cost
- Engagement — registrations & active-travel miles
The two people-related areas (wellbeing and retention) apply to staff programmes. For resident and student audiences we show the environmental outcomes only, using published per-person figures for those groups.
For universities, some energy, water and waste savings happen at home rather than on campus. We split these by a campus share, set from your own figures where possible. The campus share counts as institution savings. The home share counts as savings to students' and staff's own households, with home energy priced at domestic rates. Home waste is a saving to the local council. The environmental totals don't change, only who benefits.
the numbersKey assumptions & sources
Every figure below is drawn from a named, published source and was refreshed against the latest available data in 2025.
| What we assume | Value | Source |
|---|---|---|
| Electricity cost | £0.20 / kWh | DESNZ energy prices1 |
| Value of avoided carbon | £260 / tonne CO₂e | DESNZ carbon values2 |
| Grid carbon intensity | 0.177 kgCO₂e / kWh | UK GHG conversion factors3 |
| Waste service cost | £0.20 / kg | UK commercial waste benchmarks5 |
| Water & wastewater cost | £3.00 / m³ | Water UK / Discover Water6 |
| Household waste (residents) | 409 kg / person / yr | DEFRA waste statistics4 |
| Sick days per employee | 4.4 / yr | ONS sickness absence7 |
| Cost of a sick day | £153 | ONS earnings (ASHE)8 |
| Staff turnover & replacement cost | 15% · £15,000 | CIPD / Oxford Economics9 |
The reductions we apply
These come from measured outcomes on our own client programmes and are intentionally conservative — a small fraction of each cost, applied to the whole organisation:
| Area | Reduction | Evidence |
|---|---|---|
| Energy | 1.0% | Royal Bank of Scotland programme10 |
| Waste | 0.25% | Bexley Council programme10 |
| Carbon | 0.57% | University of Bristol programme10 |
| Water | 1.0% | Across multiple client programmes10 |
| Business travel | 0.5% | Across multiple client programmes10 |
| Wellbeing (sick days) | 0.25% | University of Chichester programme10 |
| Staff turnover | 0.10% | Team Jump estimate (conservative) |
the small printHow we keep it honest
These are modelled estimates, not metered savings. They show the likely scale of impact to support planning and proposals — not a guaranteed or audited figure.
We lead with the strongest numbers. Registration and engagement figures come straight from our platform data. Environmental and financial figures are estimates and should be presented as a range, not a single certainty.
Some figures are provisional. Student and resident baselines use published national averages as a stand-in until organisation-specific data is available; for a firm proposal we use your own figures wherever possible.
the sourcesReferences
- Department for Energy Security & Net Zero (DESNZ), Quarterly Energy Prices, 2025.
- DESNZ, Valuation of greenhouse gas emissions for policy appraisal and evaluation (central series, 2020 prices), 2025.
- DESNZ / DEFRA, UK Government greenhouse gas conversion factors for company reporting, 2025.
- Department for Environment, Food & Rural Affairs (DEFRA), Local authority collected waste management statistics, 2021/22.
- WRAP, Gate Fees Report, and UK commercial waste collection benchmarks, 2025.
- Water UK / Discover Water, average water and wastewater charges, 2025–26.
- Office for National Statistics (ONS), Sickness absence in the UK labour market, 2024.
- ONS, Annual Survey of Hours and Earnings (ASHE), 2025.
- CIPD, Resourcing and talent planning survey, 2024; and Oxford Economics, cost of staff turnover.
- Team Jump client programmes — Royal Bank of Scotland, Bexley Council, University of Bristol and University of Chichester case studies. Available on request.
Model developed in partnership with Northumbria University. Figures current as at 2025; we review our sources at least annually.