So Energy tariffs: prices, types & how to compare
A UK-focused guide to So Energy tariff options, what affects your unit rates, and how to compare like-for-like before you switch.
- Understand So Energy fixed, variable and smart-style options (where available)
- See what typically changes your quote: region, meter type and payment method
- Use our checklist and scenarios to decide if it suits your home
Prices vary by region, meter and payment method. Quotes shown on this page are examples only and may change.
Fast answer: what are So Energy tariffs?
So Energy (a UK domestic supplier) offers tariffs that generally fall into the same categories you’ll see across the market: variable (prices can change), fixed (unit rate and standing charge are usually set for a term), and smart / time-of-use style options where available (prices vary by time period and require the right meter and setup). The best tariff for you depends on your region, meter type (credit, prepayment, smart, Economy 7), payment method, and how much energy you use.
Key point: You can’t judge a tariff by a headline price alone. Always compare the unit rates (p/kWh), standing charges (p/day), tariff end date (if fixed), and any exit fees—based on your own usage and meter type.
Key takeaways
- Rates vary by postcode (your electricity distribution region matters).
- Meter type matters: smart vs traditional, Economy 7, prepayment.
- Fixed doesn’t always mean cheaper—it mainly buys price certainty.
- Switching is usually straightforward if you’re not in debt and your details match (address, MPAN/MPRN).
What to check before choosing
- Your current tariff end date and any exit fees.
- Whether you’re on single-rate or Economy 7.
- If your smart meter is communicating (affects smart-style tariffs and readings).
- How you pay: Direct Debit, cash/cheque, or prepayment.
If you want the quickest route
Use your postcode and current usage (or bill) to compare So Energy against the wider market.
Compare So Energy with the marketAvailable tariffs from So Energy
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Tell us a few basics and we’ll show estimated costs for So Energy and comparable tariffs from other suppliers, based on your postcode, meter type and usage.
- What you’ll need
- Postcode, address details, and ideally your annual usage in kWh (or a recent bill).
- What we’ll show
- Estimated annual and monthly costs, tariff type (fixed/variable), key terms (exit fees, end dates), and suitability notes.
Accuracy note: Quotes are estimates based on the information you provide and supplier tariff data available at the time. Your final prices can differ if your meter setup, consumption pattern, or eligibility is different.
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So Energy tariff types explained (UK terms)
Fixed tariffs
Your unit rates and standing charge are usually set for a term (e.g. 12 months). Useful for budgeting.
- May include exit fees if you leave early.
- Often revert to a variable tariff at the end unless you switch.
Variable tariffs
Prices can change. Many variable tariffs track the Ofgem price cap (but you should check whether the tariff is capped or supplier-set).
- Usually no exit fees.
- Less certainty if rates rise.
Smart / time-of-use style
Some tariffs (across the market) can price electricity differently by time (e.g. cheaper off-peak). These typically require a working smart meter and may not suit everyone.
Important: Availability and names of tariffs change. Use a tailored comparison to see which So Energy tariffs are open to new customers today for your meter type and region.
So Energy tariffs vs alternatives: what to compare
Use this table to compare So Energy against other suppliers without getting tripped up by tariff names. Focus on what changes your bill in real life: standing charge, unit rate, and any peak/off-peak split.
| Compare item | Why it matters | Where it appears | Quick tip |
|---|---|---|---|
| Electricity unit rate (p/kWh) | Most of your bill is usage-based, especially in higher-use homes. | Tariff Information Label / quote | Compare with your meter type: single-rate vs Economy 7 vs smart/time-of-use. |
| Standing charge (p/day) | You pay it regardless of usage; it can dominate for low-use properties. | Tariff details | If you’re away often, prioritise a competitive standing charge. |
| Payment method | Direct Debit vs receipt-of-bill vs prepay can have different pricing. | Quote setup | Quote using how you will actually pay—don’t assume the cheapest method applies. |
| Exit fees (fixed) | Leaving early can cost you, reducing the benefit of switching again. | Terms / tariff label | Check if fees apply per fuel (electricity + gas). |
| Tariff end date (fixed) | At the end you may move to a different (often variable) tariff. | Welcome pack / account | Set a reminder 4–6 weeks before the end to review options. |
Decision checklist: who So Energy tariffs may suit
- You want a straightforward tariff and online account management.
- You can provide regular meter readings (or have a working smart meter).
- You’re happy to compare on total estimated cost, not brand alone.
- You’re near the end of a fixed deal (or your current tariff has no exit fee).
Who it may not suit (or needs extra checks)
- You rely on prepayment and need specific top-up options—check tariff availability first.
- You’re on Economy 7 and your usage is mainly daytime (a single-rate tariff could be cheaper, but not always).
- You have complex metering (multiple meters, restricted meters) and need a specialist quote.
- You’re in debt with your current supplier—switching may be restricted until a plan is agreed.
Costs, exclusions and common pitfalls (UK-specific)
1) Standing charge surprises
Some tariffs look cheap on unit rate but have a higher standing charge. If you’re a low user (small flat, away often), the standing charge can make a bigger difference than the unit rate.
Tip: Ask for an estimated annual cost using your actual kWh. That’s the fairest comparison.
2) Economy 7 / multi-rate mismatches
If you have an Economy 7 meter, you’ll typically get separate day and night rates. Switching to a single-rate tariff can help or harm, depending on how much you use off-peak.
Check: Your off-peak percentage. If you don’t know it, a bill often shows day/night kWh.
3) Fixed tariff exit fees
If you’re currently fixed, leaving early may cost an exit fee per fuel. If your current fix ends soon, you may be able to switch in the final weeks without a fee (terms vary by supplier).
Do this: Find “exit fee” and “end date” on your tariff info label or account.
4) Smart tariffs need a communicating smart meter
Time-of-use style pricing usually depends on half-hourly readings. If your smart meter isn’t communicating (or you opt out of smart reads), eligibility can change.
5) Regional price differences
Electricity standing charges and unit rates vary by region (your local distribution area). Two households on the “same tariff name” can pay different rates in different postcodes.
6) Moving home mid-tariff
If you move, your tariff may not transfer to the new address on the same terms. Always ask what happens to your rates, and whether exit fees apply if you don’t transfer.
Two realistic cost scenarios (illustrative)
These examples show how tariff structure affects your bill. They’re not a prediction of So Energy’s current prices. VAT at 5% is included. Figures are rounded.
Scenario A: Low-use flat (electricity only)
- Usage: 1,800 kWh/year
- Tariff 1 (lower unit / higher standing): 24p/kWh + 60p/day
- Tariff 2 (higher unit / lower standing): 26p/kWh + 45p/day
| Item | Tariff 1 | Tariff 2 |
|---|---|---|
| Unit cost | 1,800 × £0.24 = £432 | 1,800 × £0.26 = £468 |
| Standing charge | 365 × £0.60 = £219 | 365 × £0.45 = £164 |
| Estimated total | £651/year | £632/year |
Result: for a low user, the lower standing charge can outweigh a slightly higher unit rate.
Scenario B: Typical dual-fuel home (gas + electricity)
- Electricity usage: 2,900 kWh/year
- Gas usage: 12,000 kWh/year
- Tariff 1: Elec 25p/kWh + 55p/day; Gas 6p/kWh + 32p/day
- Tariff 2: Elec 26p/kWh + 48p/day; Gas 6.2p/kWh + 29p/day
Estimated totals:
- Tariff 1: Elec (£725 + £201) + Gas (£720 + £117) ˜ £1,763/year
- Tariff 2: Elec (£754 + £175) + Gas (£744 + £106) ˜ £1,779/year
What this shows: for higher usage, small unit-rate differences can dominate. Always run the numbers on your own kWh.
Assumptions: 365 days, VAT at 5% included in stated rates for simplicity, no additional discounts/bonuses, no time-of-use periods, and no changes during the year. Real tariffs may change on variable deals.
So Energy tariffs FAQs
1) Are So Energy tariffs capped by Ofgem?
Some standard variable tariffs in the UK are covered by the Ofgem price cap (where applicable), but fixed tariffs are not price-capped in the same way. Always check the tariff’s documentation to see whether it’s a capped SVT, a supplier-set variable tariff, or a fixed deal.
2) Why do So Energy prices differ by postcode?
Electricity costs vary by distribution region (network charges differ across Great Britain). Your standing charge and unit rate can therefore vary even on the same tariff name. Gas is typically less regionally variable, but still can differ.
3) Can I join So Energy if I have a prepayment meter?
It depends on the tariff availability for your meter type and whether a supplier is accepting new prepayment customers on that product. If you have prepay, compare using a quote that’s specifically set to prepayment so the rates and eligibility are accurate.
4) Will I lose supply when switching to So Energy?
No—switching supplier doesn’t mean your energy is physically switched off. Your electricity and gas still come through the same networks. If a switch is set up correctly, supply continues as normal while the billing transfers.
5) How long does a switch usually take in the UK?
Timescales can vary, but many UK switches complete within a few working days. Complex cases (meter issues, address mismatches, or certain prepay situations) can take longer. You’ll usually receive updates as the switch progresses.
6) What if I’m in debt to my current supplier?
Debt can restrict switching, especially for prepayment meters. Often you’ll need an agreed repayment plan. If you’re struggling, get free, impartial advice via Citizens Advice and speak to your supplier about support options.
7) Do I need a smart meter for So Energy tariffs?
Not for standard fixed or variable tariffs. You typically only need a communicating smart meter for certain smart/time-of-use style tariffs (where available). If you’re unsure, compare using your current meter type and we’ll flag any requirements.
8) What details should I check on So Energy’s tariff before switching?
Check: unit rate(s), standing charge, tariff length and end date (if fixed), exit fees, payment method, and whether your meter type (single-rate, Economy 7, prepay) is supported on that product in your region.
Trust, methodology and sources
Page ownership
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- March 2026
How we assess So Energy tariffs (and any supplier tariff)
- Like-for-like inputs: We compare tariffs using the same postcode/region, fuel (electricity only vs dual fuel), meter type (single-rate, Economy 7, prepay, smart), and payment method.
- Total estimated cost: We prioritise estimated annual cost using customer-provided kWh (or typical usage ranges where kWh is unknown), rather than focusing only on unit rates.
- Terms that affect real outcomes: We surface exit fees, tariff end dates, and important eligibility/operational requirements (e.g. smart meter data needs for time-of-use).
- User-fit notes: We add guidance for common situations (moving home, Economy 7, low usage, prepay) so you can choose what fits your household.
Limitations: Suppliers can change tariffs, prices and availability quickly. Your final costs depend on actual usage, meter configuration, and any future price changes on variable tariffs.
Independent UK sources we use
- Ofgem guidance on the energy price cap
- Citizens Advice: switching energy supplier
- GOV.UK: energy bills support and guidance
We aim to keep guidance accurate and practical. If you spot something that looks out of date, please use our quote form and note your question in your enquiry.
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