Standing Charge Calculator
A standing charge is the fixed daily fee on a UK energy bill: you pay it for being connected, whether you use any energy or not. This page has three tools in one. The standing charge tab works out what that daily fee really costs per week, month and year for electricity, gas or both; the full bill tab estimates a complete bill from your usage, unit rate and billing days with VAT; and compare tariffs puts two deals head to head at your actual annual usage and tells you which is cheaper.
Quick Answer
A standing charge is the fixed pence-per-day fee for being connected to the energy network, charged even if you use nothing. At 57.19p/day for electricity and 29.04p/day for gas, the two together cost £314.74 a year before you use a single kilowatt-hour. Use the calculator above to price your own figures, estimate a full bill, or compare two tariffs at your usage.
Key takeaways
- The standing charge is fixed: daily pence × 365 is the annual cost, regardless of usage, which is why it hits low-usage households hardest.
- It varies by fuel, supplier and region, and Ofgem resets the price-cap maximum every quarter, so treat any figure as current-period only.
- A full UK bill is (kWh × unit rate) + (standing charge × days), plus VAT: 0% on Great Britain electricity from 1 October 2026 to 31 March 2027, and 5% otherwise (gas UK-wide, Northern Ireland electricity, and GB electricity again from 1 April 2027).
- Low-standing-charge tariffs usually charge more per unit: the comparison tab finds which deal wins at YOUR annual usage, not the average home's.
- Monthly cost uses an average month of 30.44 days (365 ÷ 12), the convention behind the monthly figures here.
How to use the three tools
Pick the tab that matches your question. Every tab is pre-filled with a worked example, and nothing calculates until you click.
- Standing charge: choose Electricity Only, Gas Only or Both, enter the daily pence figure from your bill, and click Calculate. You get the daily, weekly, monthly and annual cost, plus a combined total and a plain-English verdict when both fuels are entered.
- Full bill: enter your kWh, unit rate, standing charge and the days the bill covers, then pick your fuel and region. The tool adds the usage cost to the standing charge cost, applies VAT at that rate (0% for Great Britain electricity from 1 October 2026 to 31 March 2027; 5% for gas, for Northern Ireland electricity, and for GB electricity from 1 April 2027), and shows the total plus the average daily cost.
- Compare tariffs: enter two tariffs (standing charge and unit rate each) and your annual kWh. Each tariff's annual total is standing charge × 365 plus unit rate × kWh, and the verdict names the cheaper one and by how much.
The formulas, in plain sight
The arithmetic is deliberately simple, and it matches the bill formula that independent UK bill guides publish: usage cost plus standing-charge cost, then VAT.
Full bill = (kWh × unit rate ÷ 100) + (standing charge × days ÷ 100), then VAT: × 1.00 for GB electricity (1 Oct 2026 to 31 Mar 2027) or × 1.05 for gas, NI electricity and GB electricity from 1 Apr 2027
Tariff annual total = (standing charge × 365 + unit rate × kWh) ÷ 100
Two conventions to know. Monthly figures use 30.44 days, the average month, so a "monthly" cost is really one-twelfth of the annual figure. And VAT on domestic energy is normally the reduced 5% rate, set out on GOV.UK's VAT rates page, but it is temporarily 0% on domestic electricity in Great Britain from 1 October 2026 to 31 March 2027, under VAT Notice 701/19 (fuel and power) and the temporary zero rate tax information and impact note: 5% returns on 1 April 2027 unless extended, Northern Ireland electricity stays at 5%, and gas stays at 5% UK-wide. That is why the full-bill tab asks for your fuel and region and applies the rate you pick.
Worked examples, checked against the tools
Every number below is exactly what the calculator prints for the pre-filled inputs, so you can reproduce each one with one click.
| Example | Inputs | Result |
|---|---|---|
| Standing charge, both fuels | 57.19p + 29.04p per day | £0.86/day, £26.25/month, £314.74/year |
| Full bill, one month (GB electricity) | 250 kWh at 24.5p, 60p/day, 30 days | £61.25 usage + £18.00 standing = £79.25 with 0% VAT (£83.21 as gas or NI electricity at 5%) |
| Tariff comparison | A: 60p/24p, B: 35p/25.5p, 15,000 kWh | A £3819.00 vs B £3952.75: A cheaper by £133.75 |
The comparison example shows the trap the tab exists to catch. Tariff B's standing charge is 25p a day cheaper, which sounds like a win, but its unit rate is 1.5p higher on 15,000 kWh, costing an extra £225 in units while saving only £91.25 in standing charges. At low usage the verdict flips: drop the usage to 2,000 kWh and B wins. Always compare at your own usage, never at the headline daily rate.
Where the numbers come from, and why they change
Standing charges are not one national number. Ofgem sets a maximum through the energy price cap, updated every quarter, with separate rates for each of the 14 network regions, and suppliers set their own figures within it. The pre-filled 57.19p (electricity) and 29.04p (gas) reflect a recent cap period's averages; check the current cap before treating them as today's rates. As the supplier guide from Utility Warehouse explains, the charge covers keeping you connected and maintaining the network, which is also why it applies to prepayment meters every single day, even when the meter is topped up and nothing is running.
What competing calculators miss
UK bill tools cluster around two jobs, and the standing charge itself falls between them:
- Price-cap data sites (utilitybillcalculator.quest): excellent Ofgem tables by region and quarter, but no tool that prices the standing charge on its own, and nothing that compares two tariffs at your usage.
- Appliance-level calculators (energyguide.org.uk): detailed usage tracking with the same bill formula this page uses, but the standing charge is one line in a big appliance model, not something you can price in isolation.
- Meter-reading bill calculators (smartmoneytools.co.uk): good for checking one bill from two readings, with a VAT-already-included option, but single-tariff only: no comparison, no annual view.
- Supplier brand pages (gasbillcalc.com): British Gas bill tables and benchmarks, but the "calculator" is rate tables and worked examples, not an interactive comparison.
- How-to guides (oneutilitybill.co, ukcalculator.com): walk through the gas-bill arithmetic step by step (imperial meter conversion, calorific value and all), which is genuinely useful, but static: change one number and you redo the maths yourself.
- The gap this page fills: a standing-charge-only breakdown nobody else offers (daily, weekly, monthly and annual for each fuel and both), next to a full bill estimator with the VAT line shown, next to a two-tariff comparison that names the winner at your usage. Three honest tools, each doing the one job the others skip.
If standing charges dominate your bill because you use little energy, the gas cost per month calculator breaks gas spending down month by month, the cost of energy calculator prices energy in different units, and the energy inflation calculator shows how those bills have grown over time.
Frequently asked questions
A standing charge is a fixed daily fee, in pence per day, that you pay for being connected to the energy network. It covers the network, the meter and administration, and it applies every day even if you use no gas or electricity at all.
Because the charge is for the connection, not the consumption. The network has to reach your home and your meter has to be maintained whether you draw power or not, so suppliers recover those fixed costs through a daily fee that is independent of usage.
Multiply your kilowatt-hours by the unit rate, add the standing charge times the number of days, then add VAT at the rate for your fuel and region: 0% on Great Britain electricity from 1 October 2026 to 31 March 2027, and 5% on gas anywhere in the UK, on Northern Ireland electricity, and on GB electricity again from 1 April 2027. For example, 250 kWh at 24.5p with a 60p daily charge over 30 days is £61.25 + £18.00 = £79.25; as a Great Britain electricity bill in the zero-rate window it adds £0.00 VAT for a total of £79.25, while the same figures as gas or Northern Ireland electricity add £3.96 VAT for a total of £83.21.
No. It varies by fuel, supplier, tariff and region: Ofgem sets different price-cap rates for each of the 14 network areas and updates the cap every quarter. Your bill shows your own figure in p/day, which is what you should enter in the calculator.
Some suppliers offer zero or low standing charge tariffs, but they almost always charge more per unit to compensate. Whether that saves you money depends entirely on your usage: enter both deals in the comparison tab with a 0 standing charge and see which annual total is lower.
Domestic fuel and power normally carry a reduced 5% VAT rate in the UK rather than the standard 20%, but domestic electricity in Great Britain is temporarily zero-rated from 1 October 2026 to 31 March 2027 under VAT Notice 701/19 and SI 2026/987: the rate returns to 5% on 1 April 2027 unless extended. Northern Ireland electricity stays at 5% throughout, and gas stays at 5% across the UK. The full-bill tab therefore asks for your fuel and region and applies the matching rate.
Ofgem reviews the price cap every three months, so the maximum standing charge can change quarterly; fixed tariffs lock your rate for the deal length instead. That is why the pre-filled figures here are labelled as recent cap-period values, not permanent prices.
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References
- Ofgem. Energy price cap: what it is and how it is set. Accessed October 23, 2026.
- GOV.UK. VAT rates: reduced 5% rate for domestic fuel and power. Accessed October 23, 2026.
- GOV.UK / HMRC. Fuel and power (VAT Notice 701/19): temporary zero rate for domestic electricity in Great Britain, 1 October 2026 to 31 March 2027. Accessed October 24, 2026.
- GOV.UK. Temporary zero rate of VAT for domestic electricity in Great Britain: tax information and impact note (SI 2026/987). Published September 8, 2026; accessed October 24, 2026.
- Utility Warehouse. What Are Standing Charges for Gas and Electricity? Accessed October 23, 2026.
- Citizens Advice Allerdale. Understanding your energy bill (standing charges and tariff information). Accessed October 23, 2026.
- Resolver. Low standing charge energy tariffs: will they actually save you money? Accessed October 23, 2026.