The household
Three-bed semi-detached in Nottingham, East Midlands. Sarah and Dan, both working from home two days a week. One daughter, age 11. No electric vehicle. Gas central heating and hot water. Two appliances that get heavy use: a Samsung washing machine and an integrated Bosch dishwasher.
Annual electricity consumption: approximately 3,800 kWh. Right in the UK average range for a family of three.
Previous tariff: standard variable at 26.11p/kWh. Their monthly electricity bill over the previous year averaged £89/month in summer and £127/month in winter. Nothing unusual. Nothing they thought about much.
Their SMETS2 smart meter had been installed in October 2025 by their previous supplier. It was already communicating correctly, which meant the switch to Agile was straightforward - no wait for a meter installation, no delays. They switched in the first week of October 2025.
They are not particularly tech-savvy. Dan says he "sets the microwave clock once and never touches it again." Sarah is more methodical but was skeptical: "I just didn't believe we'd remember to check prices every day."
This is their story.
Month 1 (October 2025): getting used to checking prices
The first week felt slightly chaotic. Not because anything went wrong, but because Sarah and Dan were trying to build a habit they'd never had before. They downloaded the Octopus app. They bookmarked AgileAlert. They read articles about the best overnight windows. And then they forgot about it on Tuesday and ran the washing machine at 3pm.
"That first time I forgot, I looked at AgileAlert afterward and it had been 28p/kWh," Sarah says. "The overnight rate that same night was 4p. That was the moment I got serious about it."
By the end of week two, checking AgileAlert had become part of the evening routine - just a glance at the phone before bed, note the cheapest overnight window, set the washing machine delay. It took 45 seconds. The dishwasher went on a delay start after 11pm. Small changes. Barely noticeable.
What they didn't do in Month 1: they didn't touch the tumble dryer habits (it ran whenever it was needed, no timing changes). They didn't check for plunge pricing. They focused only on the washing machine and dishwasher timer habit, which felt like enough for a first month.
Month 1 bill: £89
Previous year, same month (October 2024): £105
Saving: £16
Modest. But real. And encouraging enough to keep going.
Month 2 (November 2025): habits forming, savings accelerating
November was when it clicked. The habit of checking prices had become automatic - not effortful, just part of the routine. Sarah started checking AgileAlert at breakfast rather than before bed, which meant she could plan the whole day's big appliance usage, not just set overnight timers.
The washing machine ran overnight every time. No exceptions. The dishwasher after 11pm, every single evening. Dan added the tumble dryer to the overnight timer routine. "It finishes by 6am and the clothes are there waiting. I actually prefer it now."
Then came the plunge pricing events.
November 2025 delivered four plunge pricing windows in their East Midlands region - periods where Agile prices dropped to zero or below. Sarah had set up AgileAlert notifications. The first plunge event notification arrived on a Sunday evening at 11pm: prices were forecast at -8p/kWh from 1am to 3am.
"I felt slightly ridiculous setting an alarm for 1am to turn on the tumble dryer," she says. "But I did it. And then I realised I just needed to put it on a timer, not wake up myself."
During those four plunge events in November, they ran the washing machine, dishwasher, and tumble dryer. Octopus credited them for electricity used during negative pricing periods. Small amounts - a few pence per event - but psychologically significant. The electricity company was paying them.
Month 2 bill: £98
Previous year, same month (November 2024): £127
Saving: £29
Nearly double the Month 1 saving. The habit was compounding.
Month 3 (December 2025): into winter, cold snap weeks included
December is the month that tests Agile customers. Days are shortest, demand for lighting and heating is highest, and cold snap events are possible. For Sarah and Dan, December 2025 delivered both extremes.
December 10 to 12 brought a cold anticyclone - still, clear, cold weather across the Midlands. No wind. Minimal solar. Gas plants running flat out. AgileAlert showed the forecast the afternoon of the 9th: peak prices of 52-65p/kWh from 5pm to 8pm for three consecutive evenings.
"I won't pretend I wasn't nervous," Sarah admits. "Seeing 65p on the screen is alarming when you're used to 26p."
But they had the cold snap playbook by then. Three simple rules: check prices by 4pm, avoid all non-essential usage from 5pm to 9pm, run everything after 11pm. For three days, dinner was cooked before 5pm or heated up in the microwave after 9pm. The washing machine and dishwasher were pushed to the midnight window. The tumble dryer waited.
The bills for those three cold snap days came out at roughly £3.80-£4.20/day - slightly higher than a normal December day on Agile, but meaningfully below what a standard tariff customer paid. Their neighbours on fixed tariffs paid 26.11p for every unit, all day. Sarah and Dan paid an average of around 9p/kWh across the full 24 hours, because overnight rates stayed low at 4-6p even during the cold snap.
Christmas week was the opposite. Low demand from factories and offices shutting down. Mild weather briefly returning. Several cheap overnight windows. Dan describes checking AgileAlert on Christmas morning: "It was like a Christmas present. Prices at 2p overnight for three days."
They ran everything through Christmas week. The cumulative credit from plunge events in November and December was enough to offset two days of the cold snap premium.
Month 3 bill: £112
Previous year, same month (December 2024): £149
Saving: £37
Their best month yet - despite the worst weather of the three months.
The final numbers
| Month | Agile bill | Previous year (same month) | Saving |
|---|---|---|---|
| October 2025 | £89 | £105 | £16 |
| November 2025 | £98 | £127 | £29 |
| December 2025 | £112 | £149 | £37 |
| Total | £299 | £381 | £82 |
Three months. £82 saved. An annualised projection of approximately £330/year - with no EV, gas heating, and a household that only settled into its Agile habits by the end of month one.
"If we'd had an EV," Dan says, "this would be £500+ easily. Maybe more. I'm already looking at EVs differently now."
The Octopus Energy average saving of £440/year includes EV owners and households with heat pumps. For a family with Sarah and Dan's profile, £330/year is realistic and consistent with what the data predicts for East Midlands households with their usage level.
What they'd do differently
Looking back, Sarah and Dan have specific answers to this question.
"Set up appliance timers in week 1, not week 3." The delay start function on both the washing machine and dishwasher was always there. They just hadn't used it. Setting it up took five minutes per appliance. Those three weeks of running appliances at arbitrary times cost them real money.
"Know about the 4pm price check habit from day one." The fact that next-day Agile prices are published around 4pm daily - giving you a full evening to plan - is not prominently communicated anywhere. A friend mentioned it in week three. It changed how they used the tariff.
"Add a smart plug for the dehumidifier sooner." Their house has a basement dehumidifier that runs for 4 hours at a time. Adding a smart plug and scheduling it overnight took 10 minutes and saves approximately £4/month for a device they'd never thought about timing before.
"Not worry about the first cold snap notification." The anxiety of seeing 65p on the screen was wasted energy. The plan was simple. It worked. The bill was lower than their neighbours anyway.
What their monthly routine looks like now
Nine months after switching, the Agile habit takes approximately 3 minutes per day and is as automatic as checking the weather.
Sarah checks AgileAlert at breakfast. Glances at overnight prices. If anything unusual is forecast for the peak window, she notes it. Sets the washing machine delay start before loading it in the evening. Dishwasher goes on after 11pm. Tumble dryer runs from its timer, set once and rarely changed. Checks AgileAlert on Monday and Friday in winter to scan for plunge events or cold snap forecasts.
That is the whole routine. No spreadsheets. No complexity. Just a 30-second habit that has saved them over £300 in its first year - and they haven't even bought an EV yet.
"The strangest thing," Sarah says, "is that I now feel like I understand electricity for the first time. I know when it's expensive. I know when it's cheap. I feel like I'm in control of it instead of just paying whatever bill arrives."
That feeling - of understanding something that used to feel opaque - is what Agile gives you beyond the saving. Read the complete Agile guide if you want the full picture before switching, or check the honest guide to who shouldn't switch to make sure Agile is the right fit for your household.