Efficient appliances calculator
Efficient appliances payback calculator for the UK
Estimate payback from A-rated appliance upgrades using UK electricity prices and annual kWh savings.
Use label kWh/year where possible; efficiency class alone is not enough for a money decision.
Before
Current running cost
After
Efficient running cost
Your appliance upgrade payback
Change old kWh, efficient kWh, electricity rate, and upgrade premium.
Decision signal
Worth checking quotesThe default case can work, but local prices and rebates decide the final answer.
Annual saving
£117
Simple payback
5.1 years
10-year net
£575
This does not pay back with these assumptions. Try a lower upfront cost, higher usage, or better tariff spread.
Before vs after annual cost
lower is better| Decision number | Default | Why it matters |
|---|---|---|
| Upfront / net cost | £600 | The amount the savings must recover. |
| 5-year net | -£13 | Useful if you may move or replace equipment early. |
| 10-year net | £575 | The long-run money signal after upfront cost. |
Annual saving = (old annual kWh - efficient annual kWh) x electricity price.
Default values are source-backed planning benchmarks, not quotes. For the most accurate result, replace them with your own bill, tariff, vendor quote, grant, and usage numbers.
Before you buy
Use the calculator as a quote filter
1. Enter your real tariff
Use your bill or supplier app, not a sales estimate.
2. Add the actual quote
Net of grants, rebates, discounts, and installation extras.
3. Share the link
Keep everyone comparing the same assumptions.
Trust layer
- -No signup wall before the answer.
- -Sources are visible at the bottom of every calculator.
- -The result warns users when the math does not pay back.
Quick answers
Common questions
Is this efficient appliances calculator exact?
It is a planning estimate, not a quote. Replace the defaults with your actual quote, tariff, usage, and incentive numbers before buying.
Why does payback change so much when I move the sliders?
Big energy purchases are sensitive to usage, local energy prices, upfront cost, and incentives. A small change in those assumptions can move payback by years.
Should I use this before talking to vendors?
Yes. The calculator gives you a neutral baseline so you can compare vendor claims against source-backed math.
Sources for this page
- Energy Saving Trust home appliances, UK appliance lifetime and annual savings examples.
- Ofgem energy price cap, UK domestic electricity and gas unit-rate benchmarks.