DNO standing charges: why your electricity bill is higher than your neighbour's
Two households on identical tariffs with identical usage can pay different electricity bills — purely because of where they live. The culprit is the Distribution Network Operator standing charge, which varies across the UK's 14 DNO regions. For heat pump owners comparing tariffs, understanding this regional variation matters: it affects both your daily standing charge and, on some tariffs, your unit rates.
What a standing charge actually covers
Your electricity bill has two components: a unit rate (what you pay per kWh used) and a standing charge (a fixed daily amount regardless of usage). The standing charge is often treated as a nuisance line on the bill, but it covers something real: the cost of the physical infrastructure that delivers electricity to your home.
Under the April–June 2026 Ofgem cap, the average GB electricity standing charge is 57.21p/day — roughly £209/year before a single unit of electricity is used. That figure is made up of several layers:
- Distribution charges (DUoS): ~11.6p/day — paid to your local Distribution Network Operator to maintain the cables, transformers, and substations that carry electricity from the national grid to your street.
- Transmission charges (TNUoS): ~22.3p/day — paid to National Grid ESO for the high-voltage national transmission network. This component rose 65% in Q2 2026, adding around 9p/day, to fund major grid investment.
- Smart metering, operating costs, supplier margin: the remainder.
Almost 60% of your electricity standing charge is network costs. The transmission component is national and the same everywhere. The distribution component varies — and that variation is where regional differences come from.
The 14 DNO regions and why they differ
Great Britain is divided into 14 Distribution Network Operator regions, each operated by a licensed company responsible for the local electricity network. The 14 regions are:
| Region | DNO operator |
|---|---|
| Eastern England | UK Power Networks |
| East Midlands | East Midlands Electricity (part of E.ON) |
| London | UK Power Networks |
| Merseyside & North Wales | SP Manweb (part of Scottish Power) |
| Midlands | Western Power Distribution (part of National Grid) |
| North East England | Northern Powergrid |
| North West England | Electricity North West |
| Northern Scotland | SSEN Transmission |
| South East England | UK Power Networks |
| South West England | Western Power Distribution |
| Southern England | Scottish & Southern Electricity Networks |
| South Wales | Western Power Distribution |
| Yorkshire | Northern Powergrid |
| Southern Scotland | SP Distribution (part of Scottish Power) |
Each DNO files its own charges with Ofgem annually. The charges reflect the actual cost of maintaining that region's network: how densely populated it is, how much infrastructure investment is needed, how rural or urban the geography, and how much the network has historically been maintained or deferred.
The result: your distribution charge depends on where you live, not just which supplier you chose.
How much does the region affect your bill?
The spread between cheapest and most expensive DNO region is roughly 10–12p/day on the standing charge, and 1–3p/kWh on the unit rate. In annual terms:
- Standing charge spread: ~£36–£44/year between cheapest and most expensive region
- Unit rate spread: ~£60–£240/year depending on consumption (at 6,000–8,000 kWh heat pump consumption)
For a heat pump household using 7,000 kWh/year, the combined regional variation could be £100–£280/year — on an identical tariff with identical usage.
Northern Scotland and Merseyside typically sit at the higher end; London and Eastern at the lower end. Northern Scotland's sparse rural network and challenging terrain mean higher per-household infrastructure costs. Merseyside's higher charges reflect historical network investment and, in parts, the cost of undersea cables serving Anglesey.
What this means for heat pump tariff comparisons
This is where regional variation becomes directly relevant to your tariff comparison.
Most dedicated heat pump tariffs — Cosy Octopus, EDF FreePhase, E.ON Next Pumped, British Gas Heat Power — are priced as a percentage of the Ofgem cap for your region. Because the regional cap rates differ, the absolute pence-per-kWh figures differ too, even on the same tariff product.
Example: Cosy Octopus off-peak is approximately 51% below the standard day rate for your region. If your regional day rate is 23p/kWh (Eastern England, lower end), your off-peak is ~11.3p. If your regional day rate is 26p/kWh (Merseyside, higher end), your off-peak is ~12.7p. The tariff structure is identical; the rates are different.
This is why national average figures for tariff rates — the kind published in most comparison articles — are a rough guide at best. The rate that actually applies to you depends on your DNO region.
Heat Pump Tariffs uses your postcode to determine your DNO region automatically, then applies the correct regional rates to every tariff in the comparison. The comparison you see is for your actual region, not a national average.
How to find your DNO region
Three ways:
- Your electricity bill — your DNO is usually named on the bill, or you can identify it from the meter operator details.
- Your postcode — Ofgem publishes a postcode-to-region lookup, and the Heat Pump Tariffs tool identifies your region automatically when you register.
- Your meter's MPAN — the first two digits of your 13-digit MPAN (Meter Point Administration Number, shown on your bill) identify your distribution region.
Can you do anything about your standing charge?
In practice, no — not without moving to a different DNO area. Your distribution charges are set by Ofgem and your local DNO; you can't negotiate them and your supplier can't change them. Switching supplier doesn't change your standing charge meaningfully, because the distribution cost is passed through regardless.
What you can do:
- Choose a supplier that doesn't load excessive margin onto the standing charge. Ofgem caps what suppliers can charge on standard tariffs, but fixed tariffs and specialist products can vary. Comparing standing charges across suppliers for your region is worthwhile.
- Focus optimisation on unit rates. Standing charges are fixed; unit rates aren't. A 3p/kWh saving on 7,000 kWh of annual heat pump consumption is worth £210/year — significantly more than any standing charge difference between suppliers.
- Understand the standing charge when comparing annual cost figures. A tariff with a lower unit rate but a higher standing charge may or may not be cheaper overall, depending on your consumption. The only reliable comparison is total annual cost at your actual usage level.
The short version
- Standing charges cover the physical cost of delivering electricity to your home — mainly network infrastructure.
- The UK has 14 DNO regions, each with different distribution costs. Your region is determined by your postcode, not your supplier.
- The spread between cheapest and most expensive region is roughly 10–12p/day on standing charges, and 1–3p/kWh on unit rates.
- Northern Scotland and Merseyside are typically the most expensive; Eastern England and London among the cheapest.
- Heat pump tariff rates are set as a percentage of your regional cap — so the same tariff product has different absolute rates in different regions.
- You can't change your DNO charges, but understanding them helps you make accurate tariff comparisons.
Heat Pump Tariffs applies your DNO region automatically when you set your location. Every tariff comparison uses your actual regional rates, not national averages.