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So Energy tariffs

Every So Energy tariff available right now — unit rate, standing charge, contract length, exit fee and renewable status. Last verified May 2026.

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The Ofgem Energy Price Cap fell to £1,641/year for a typical dual-fuel direct-debit household on 1 April 2026 (down £117 since January). The cap limits the unit rate and standing charge on So Energy's default So Flex variable tariff. So Green Tracker is guaranteed to sit £50/year below the cap (£25 per fuel) for a 12-month commitment, and resets every three months alongside the cap. The fixed range (So Hawthorne, Kings, Kielder, Larch) sits at or slightly above the cap — So Energy itself says wholesale prices are too high in 2026 to price fixed deals below cap. Rates below are cap-aligned approximations for the East England region; pull the live Tariff Information Label (TIL) from so.energy for the exact figures in your postcode.

Current tariffs

So Energy domestic tariffs

Prices below are the So Energy published rates for a typical single-rate meter on direct debit, excluding VAT. Final bill amounts depend on your region and meter type.

So Green Tracker

Tracker 12 months 100% renewable
So Energy logo

Variable tracker tariff guaranteed to stay £50/year below the Ofgem default-tariff price cap (£25 per fuel) at typical dual-fuel usage. Rates and standing charges reset every three months in line with the cap (1 January, 1 April, 1 July, 1 October). 100% renewable electricity. Requires a working smart meter with half-hourly reads.

Pricing

Unit rate
24.80p / kWh
Daily standing charge
53.92p / day

Gas

5.54 p/kWh

+31.84p/day standing

Contract
12 months
Exit fee
None
View tariff details on So Energy

So Fixed 12 (Hawthorne / Kings / Kielder / Larch)

Fixed 12 months 100% renewable
So Energy logo

Fixed-rate range — So Energy issues the deals under four product names (Hawthorne, Kings, Kielder, Larch) depending on the launch window. Unit rate and standing charge are locked for the full 12 months. 100% renewable electricity. £75 per fuel exit fee, waived in the final 49 days of the contract. So Energy currently prices its fixed deals at or above the Ofgem cap (April 2026): "wholesale prices are still high at the moment, so we're not able to offer fixed tariffs below the price cap".

Pricing

Unit rate
25.73p / kWh
Daily standing charge
53.92p / day

Gas

6.46 p/kWh

+31.84p/day standing

Contract
12 months
Exit fee
£75 per fuel
View tariff details on So Energy

So Fixed 24

Fixed 24 months 100% renewable
So Energy logo

Two-year version of the fixed range — same lock-in mechanics, longer horizon. Better priced than the 12-month deal in some launch windows when So Energy wants to grow the long-tenure book; equal or slightly higher in others. £75 per fuel exit fee, waived in the final 49 days of the contract.

Pricing

Unit rate
26.18p / kWh
Daily standing charge
53.92p / day

Gas

6.62 p/kWh

+31.84p/day standing

Contract
24 months
Exit fee
£75 per fuel
View tariff details on So Energy

So EV

Smart EV 12 months 100% renewable
So Energy logo

Time-of-use tariff for EV drivers. Off-peak rate of <strong>8.8p/kWh</strong> kicks in overnight between <strong>12 a.m. and 5 a.m.</strong>; peak rate applies for the rest of the day. 100% renewable electricity. Requires a UK-registered EV, a home charger and a SMETS2 smart meter sending half-hourly reads. Bundles well with a So Energy home-charger install (the supplier sells and installs OCPP-compatible chargers).

Pricing

Unit rate
8.80 off-peak (12 a.m. - 5 a.m.)p / kWh
Daily standing charge
53.92p / day
Low-rate hours
12 a.m. - 5 a.m.
Contract
12 months
Exit fee
£75 per fuel
View tariff details on So Energy

So Unique

Smart ToU 12 months 100% renewable
So Energy logo

Personalised time-of-use tariff. Uses 12 months of half-hourly smart-meter data to build a peak / off-peak / super off-peak rate schedule tailored to your individual usage curve. So Energy claims savings of <strong>up to £200/year vs. So Flex</strong> for customers who shift around 20% of their consumption into the off-peak windows (based on a 200-sample trial modelled against the Flex rate on 29 September 2025). Currently early-access with a waiting list. 100% renewable electricity. SMETS2 smart meter required.

Pricing

Unit rate
see TIL (personalised)p / kWh
Daily standing charge
53.92p / day
Contract
12 months
Exit fee
£75 per fuel
View tariff details on So Energy

So Flex

Variable No fixed term
So Energy logo

Default variable tariff and the <strong>only non-green tariff in the So Energy range</strong>. Unit rate and standing charge reset every three months at the Ofgem cap level. No exit fee, no minimum term. Where customers land when a fixed deal ends and they take no action — switch to So Green Tracker or fix again to save £50/year on dual fuel.

Pricing

Unit rate
25.73p / kWh
Daily standing charge
53.92p / day

Gas

6.46 p/kWh

+31.84p/day standing

Contract
No fixed term
Exit fee
None
View tariff details on So Energy

Prices verified against the So Energy published price list on May 2026. Always check the live price on the supplier's own website before signing up.

Selectra expert

Which So Energy tariff fits you, and what will you actually pay?

Six tariffs, four customer profiles. So Green Tracker is the default smart-shopper choice on So Energy in 2026 — £50/year guaranteed below the cap with no exit fee. So Fixed 12 / 24 only earn their keep if you believe the wholesale market is about to rise; right now the cap is falling and the fix sits above it. So EV is a strong-but-narrow deal for overnight chargers. So Flex is where you end up by default — and almost certainly the wrong place to stay.

So Green Tracker

Tracker

Best fit if — most households with a working SMETS2 smart meter who want guaranteed savings vs. the price cap and no contractual tie-in.

Skip if — you do not have a smart meter, or you would rather lock in 12-24 months of certainty than ride the quarterly cap resets.

What you'll actually pay

~£1,591/year dual fuel at typical Ofgem usage (£1,641 cap minus the £50 promise). No exit fee. Rate resets every 3 months alongside the cap. 100% renewable electricity included.

The default choice on So Energy in 2026 — same direction as Outfox's "below the cap" tracker, with a fixed-£ promise rather than a fixed-% one.

So Fixed 12 (Hawthorne / Kings / Kielder / Larch)

Fixed

Best fit if — risk-averse customers who want 12 months of bill certainty and believe the cap is about to rise.

Skip if — the price cap is falling at your switch date (it is in April 2026) — the Green Tracker will track the cap down, the fix will not.

What you'll actually pay

Roughly cap-level or slightly above for dual-fuel typical usage. £75 exit fee per fuel (waived in the last 49 days of contract).

A defensive choice rather than a savings choice in mid-2026. Re-evaluate at every wholesale-curve inflection.

So Fixed 24

Fixed

Best fit if — customers with a strong view that wholesale prices will be materially higher in 18-24 months and who want to lock in now.

Skip if — you cannot commit two years — the £75/fuel exit fee plus an above-cap rate is the worst-case combination if you exit early.

What you'll actually pay

Marginally above the 12-month fix at typical usage; the value lies in the longer hedge, not the headline rate.

Niche. Only buy this if you really do want the 2-year horizon and you have a smart meter to take the cheaper Smart variants if you change your mind.

So EV

Smart EV

Best fit if — EV drivers who can move 100% of charging into the 12 a.m. - 5 a.m. window and rarely use a public rapid charger.

Skip if — your driving pattern forces daytime charging at the peak rate, or your charger cannot be scheduled to the window.

What you'll actually pay

A typical EV driver doing ~6,000 miles/year off-peak saves £400-£500/year vs. charging on a flat tariff — but only if you actually shift the load. Off-peak rate confirmed at 8.8p/kWh.

High reward, narrow window. Run a week on Flex or Tracker first, look at the half-hourly data, then move.

So Unique

Smart ToU

Best fit if — data-rich households on a SMETS2 smart meter whose usage is shiftable into the cheap windows (dishwashers, EVs, heat pumps on timers).

Skip if — your consumption pattern is rigid (working-from-home heavy peak use) or you do not have 12 months of half-hourly history.

What you'll actually pay

Up to £200/year less than So Flex if you shift around 20% of usage into off-peak slots (Sept 2025 trial modelling). Personalised — your TIL will be unique to your profile.

Genuinely promising but early-access only. Join the waitlist, but treat any savings projection as a model output, not a commitment.

So Flex

Variable

Best fit if — a holding pattern between contracts — and almost nothing else.

Skip if — you have a smart meter (use Green Tracker instead) or you want to lock in (use Fixed instead).

What you'll actually pay

~£1,641/year dual fuel at typical usage (the April 2026 Ofgem cap level). No exit fee.

The default landing zone after a fixed deal ends — fine for a month, expensive as a destination. Move to Green Tracker or fix again within 30 days.

All figures use Ofgem's 2026 Typical Domestic Consumption Values (Electricity 2,700 kWh, Gas 11,500 kWh) at the East England (R10) cap level. Pull your own postcode's Tariff Information Label from so.energy and run a Selectra comparison against your real annual kWh before signing.

How to compare UK tariffs

Three numbers that decide your bill

  1. 1

    Unit rate (p/kWh) — the cost of the energy you actually use. The Energy Price Cap caps the unit rate on the default (Standard Variable) tariff. Fixed tariffs are usually slightly above or below the cap.

  2. 2

    Standing charge (p/day) — what you pay per day even if you use zero energy. Covers network costs, smart-meter rollout and policy levies. About 53p/day for electricity and 32p/day for gas on a typical 2026 tariff.

  3. 3

    Exit fee — what you pay to leave early on a fixed tariff. Typically £25-£75 per fuel. None on Standard Variable. None in the final 49 days of any fixed contract.

Save up to £300 per year

Is So Energy the cheapest for your usage?

Headline rates lie. The only way to know is to compare against your real annual kWh. Selectra's comparison uses your postcode + 12-month usage to find the cheapest current deal.

Compare all providers

Common questions

UK energy tariffs — frequently asked questions

Every UK domestic energy tariff has two components: a standing charge (a flat fee in pence per day, even if you use zero energy), and a unit rate (in pence per kWh you actually consume). Your bill = (standing charge × days) + (unit rate × kWh used) + VAT (5%). Compare both numbers — a tariff with a low unit rate but a high standing charge can cost more than the reverse if you use little energy.

The Energy Price Cap set by Ofgem limits how much suppliers can charge for the default (Standard Variable) tariff. It is reviewed every three months. It does not cap fixed-term tariffs — those can be cheaper or more expensive than the cap depending on wholesale prices.

Most UK fixed-term tariffs include an exit fee (typical range: £25-£75 per fuel) if you switch before the contract ends. You can switch without an exit fee in the last 49 days of your contract. The default Standard Variable tariff has no exit fee.

Many UK suppliers offer 'green' or '100% renewable' tariffs which match your annual consumption with REGO certificates. This is a paper-trail match, not a guarantee that the electrons reaching your home are renewable — but it does fund continued renewable generation. Tariffs marked '100% renewable' below carry REGO backing.

If wholesale prices are forecast to rise, fixing locks in today's price for the contract length. If they are forecast to fall, the Standard Variable tariff (capped by Ofgem) tracks the wholesale market down. The right choice depends on your appetite for stability vs. potential savings — Selectra's comparison tool factors in both.