Unit rate vs standing charge: the simplest comparison
These are the two charges people confuse most often. Unit rate is the variable price for each kWh you use. Standing charge is the fixed daily cost. If you separate them properly, most bill arguments become much simpler.
Side-by-side view
| Charge | What it is | Typical formula | Main mistake |
|---|---|---|---|
| Unit rate | Variable price for energy used | kWh × p/kWh | Comparing it directly to the total bill |
| Standing charge | Fixed daily cost | p/day × days billed | Forgetting it still applies in low-usage periods |
Related guides
Why this matters in disputes
If you tell a supplier only that “the bill is too high”, it has to guess whether you mean usage, tariff, standing charge, payment plan or something else. If you say “the unit-rate maths looks right but the standing-charge subtotal or billed days do not,” your complaint becomes far more actionable.
Official and reference sources
Frequently asked questions
Can standing charge be higher than the usage cost?
Yes, in low-usage periods it can make up a large share of the total.
If the unit rate matches my tariff, is the bill definitely right?
No. The reading, billed days and standing charge still matter.
Which should I check first?
Usually the kWh and unit rate first, then standing charge and billed days.
What you are actually paying for
The standing charge is not supplier profit. It covers costs that exist whether or not you use any energy, and knowing what is in it is what makes the “why is it so high” question answerable.
- Network costs — maintaining the cables, pipes, substations and pressure reduction stations that reach your property. This is the largest element, and it is why the charge varies by region: it costs more per household to serve a sparse network than a dense one.
- Supplier of last resort costs — when a supplier fails, the cost of transferring its customers and honouring their credit balances is spread across everyone's bills.
- Government and social schemes — the Warm Home Discount and similar obligations.
- Metering and administration — keeping your meter on the system.
Why it hurts low users most
At the GB average of 57.19p a day for electricity and 29.04p for gas, standing charges cost £314.74 a year before a single unit is used. For a household using half the typical energy, that is a much larger share of the bill:
| Household | Units cost | Standing charges | Total | Standing charge share |
|---|---|---|---|---|
| Half typical usage | £773.96 | £314.74 | £1,088.70 | 29% |
| Typical usage | £1,547.92 | £314.74 | £1,862.66 | 17% |
| Double typical usage | £3,095.84 | £314.74 | £3,410.58 | 9% |
That is the whole reason standing charges are politically contested, and it is why a low-usage household that cuts consumption further sees a smaller saving than it expects. It is also why “I was away for two months and still got a bill” has an answer: roughly £52 of standing charges accrued while the property was empty.
What you can and cannot do about it. You cannot negotiate the standing charge down on a capped default tariff. You can check you are on the right payment method (direct debit rates are lower than standard credit), check your region is right, and look at whether a fixed tariff with a different standing charge structure suits your usage. Some suppliers now offer low or zero standing charge tariffs — they recover it through a higher unit rate, so they suit low users and penalise high ones.
Which one should you actually try to change?
This is a real decision, not a trivia question, because tariffs trade one against the other.
| Your situation | What to look for | Why |
|---|---|---|
| Low usage — small flat, no electric heating, out a lot | Low or zero standing charge tariffs | The fixed charge is up to 29% of your bill. A higher unit rate on a small number of units still comes out ahead. |
| Typical usage | The lowest total, not the lowest of either number | Do the arithmetic: (your annual kWh × unit rate) + (365 × standing charge) for each option. |
| High usage — electric heating, EV, large household | The lowest unit rate, even with a high standing charge | At 6,000 kWh a year, 1p off the unit rate saves £60. 10p off the daily standing charge saves £36.50. |
| Second home or empty property | Zero standing charge, seriously | You are paying £314.74 a year for nothing at average rates. This is the one case where it is clear-cut. |
The one-line test. Take your last twelve months' actual kWh. For each tariff, calculate (kWh × unit rate ÷ 100) + (365 × standing charge ÷ 100). Compare the totals. That is the entire comparison, and it beats every headline number a comparison site puts in front of you. The standing charge calculator and the kWh calculator do the two halves.
Price cap rates by region, 1 July to 30 September 2026
Dated 1 July–30 September 2026 direct-debit rates. The annual examples below apply 2,700 kWh electricity and 11,500 kWh gas to each set of rates. Those were the older consumption assumptions; the resulting ~£1,862 national calculation is not Ofgem’s revised £1,663 typical-use headline. Compare rates and periods, not these example totals, with a current bill.
| Region | Electricity p/kWh | Elec standing p/day | Gas p/kWh | Gas standing p/day | Illustrative year older usage |
|---|---|---|---|---|---|
| East Midlands cheapest | 25.10p | 53.60p | 7.19p | 28.78p | £1,805 |
| North West | 26.13p | 47.61p | 7.24p | 29.17p | £1,818 |
| West Midlands | 25.33p | 59.71p | 7.27p | 29.06p | £1,844 |
| London | 26.35p | 44.78p | 7.50p | 29.52p | £1,845 |
| Eastern | 26.38p | 53.94p | 7.26p | 28.70p | £1,849 |
| Northern (North East) | 25.22p | 64.29p | 7.28p | 29.15p | £1,859 |
| Yorkshire | 25.31p | 64.38p | 7.27p | 29.12p | £1,861 |
| Northern Scotland | 26.42p | 57.55p | 7.23p | 29.22p | £1,862 |
| Southern | 26.42p | 49.70p | 7.53p | 28.53p | £1,865 |
| Southern Scotland | 25.85p | 64.17p | 7.23p | 29.24p | £1,870 |
| South East | 26.67p | 54.45p | 7.39p | 28.63p | £1,873 |
| South Wales | 26.33p | 57.84p | 7.42p | 29.30p | £1,882 |
| South West | 26.39p | 57.89p | 7.48p | 28.68p | £1,889 |
| Merseyside, North Wales & Cheshire dearest | 27.66p | 70.76p | 7.28p | 29.42p | £1,950 |
| GB average average rates, old-use example | 26.11p | 57.19p | 7.33p | 29.04p | £1,862 |
Annual examples: 2,700 kWh electricity plus 11,500 kWh gas over 365 days at the July–September 2026 regional rates. These are dated illustrations under the older usage assumptions, not Ofgem’s revised benchmark. Rates checked 20 August 2026; use Ofgem’s latest regional tables for a current bill.
The spread is £144 a year. Same usage, same cap, different postcode. East Midlands is the cheapest region for a typical dual-fuel household and Merseyside, North Wales and Cheshire the most expensive — and the gap is almost entirely in the electricity standing charge, which runs from 44.78p a day in London to 70.76p in Merseyside, North Wales and Cheshire. That is £95 a year of difference before anyone switches a light on.
Frequently asked questions
Can I avoid the standing charge?
Not on a capped default tariff. Some suppliers offer low or zero standing charge tariffs which recover the cost through a higher unit rate — genuinely better for low users, worse for high ones. Run the arithmetic on your own annual kWh before switching.
Do I pay a standing charge when the property is empty?
Yes. At average capped rates that is about £26 a month across gas and electricity for a property using nothing at all. It is the most common surprise on a second home or a property between tenants.
Which should I compare first when switching?
Neither in isolation. Calculate the annual total for each tariff using your own kWh: units times the unit rate, plus 365 times the standing charge. A tariff can win on both headline numbers and still lose on your usage pattern.