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So Mongoose 18m by So Energy: regional prices, payment types, fuel options & Economy 7

A UK-focused guide to every current version of So Mongoose 18m from So Energy, including Dual Fuel, Electricity options, payment methods such as Monthly Direct Debit, Economy 7 and standard-rate versions and pricing across 13 PES regions.

  • See the main So Mongoose 18m option groups in one place
  • Check region-by-region unit rates and standing charges for your exact service type, payment method and meter setup
  • Compare this tariff fairly with the wider market using your postcode and usage
Switch to So Energy — check your price See all So Energy tariffs

Unit rates and standing charges vary by region, meter type, service type and payment method. A postcode-level quote is still the fairest comparison.

Fast answer: what most people should know about So Mongoose 18m

So Mongoose 18m is best treated as a single tariff family page because the same tariff name can appear across multiple service types, payment methods, Economy 7 settings and 14 PES regions. The best version for you depends on your postcode, meter setup and how you actually pay for energy.

What our price data says: So Mongoose 18m is on sale: a fixed tariff for 18 months, exit fee £95 per fuel. Against the Ofgem cap for 1 October to 31 December 2026 its electricity unit rate is above the cap in every region (by 5.52 to 6.44p/kWh) and its standing charge is below the cap in every region (by 4.93 to 10.35p a day). In London the unit rate is 32.70p against a 26.60p cap and the standing charge 32.57p a day against 42.92p; a home at Ofgem typical use (2,500 kWh of electricity and 9,500 kWh of gas a year, Direct Debit) could pay about £1,988 a year on this tariff against £1,706 at the cap (+£282), standing charges included. See every region

Editor's rule of thumb: compare only like-for-like. If you are on Direct Debit, compare Direct Debit. If you need Economy 7, compare Economy 7. If you want dual fuel, do not compare it against an electricity-only row and assume the result is equivalent.

Key takeaways

  • Service types: Dual Fuel, Electricity
  • Payment methods: Monthly Direct Debit
  • Regions covered: 13 PES regions
  • Economy 7: available on at least one option group
  • Exit fee: up to £95.00 per fuel

What to have ready

  • Your postcode for regional pricing
  • Your meter type, including Economy 7 if relevant
  • Your annual usage or a recent bill
  • Your preferred payment method
  • Whether you need electricity-only, gas-only or dual fuel

If you're in a hurry

Use a whole-of-market quote first, then check the exact row in the regional tables below that matches your setup.

Compare prices with your postcode

Compare So Mongoose 18m with the wider market

This tariff can look different depending on region, service type, payment method and Economy 7 status. That means the fairest comparison is always postcode-based and like-for-like.

Good to know: a tariff that looks cheapest in one PES region may not be cheapest in another. Use your postcode rather than relying on a headline national figure.

What happens after you compare?

  1. We estimate annual costs using your postcode, meter type and payment method.
  2. You can compare that result with the relevant So Mongoose 18m option group on this page.
  3. If you proceed, choose the exact regional row that matches your setup before switching.

Always review tariff facts and contract terms before you complete a switch.

Get your whole-of-market quote

Tell us a few details to see estimated prices, including So Energy tariffs where available for your postcode, meter and payment method.

Start your comparison

By submitting, you confirm this is for a UK home energy comparison. We’ll use your details to provide quotes and contact you about your comparison. You can opt out at any time.

So Mongoose 18m option groups explained

To keep this page useful and SEO-friendly, we group the underlying records by service type, payment method and Economy 7. Inside each group, you can then see the regional prices across the PES areas we hold.

Fuel / service types

Current records show these service types for So Mongoose 18m: Dual Fuel, Electricity.

  • Dual fuel can be convenient but is not always cheapest.
  • Single-fuel options may suit households comparing separate suppliers.

Payment types

Current payment methods listed include Monthly Direct Debit.

  • Always compare the same payment method.
  • Direct Debit, bill payment and prepayment can produce different annual costs.

Regional prices

This page includes regional records across 13 PES regions, because energy prices are not the same everywhere in Great Britain.

  • Use postcode-based quotes for the most accurate comparison.
  • Unit rates and standing charges vary by region and are shown in the tables below.

Internal links for this tariff cluster

Read our So Energy supplier guide, browse all So Energy tariffs, or compare broader categories such as Economy 7, dual fuel and Direct Debit tariffs.

Lowest electricity unit rate shown

The lowest electricity unit rate currently shown is 31.298p/kWh under the Dual Fuel / Monthly Direct Debit / standard-rate option group. Rates range up to 33.651p/kWh across regions for this group. A postcode-level quote is needed to estimate your annual cost.

So Mongoose 18m comparison table (grouped by option type)

This summary table groups the tariff by the differences that matter most: service type, payment method and Economy 7. Each row then links to a regional breakdown so you can see all PES-region unit rates and standing charges.

Service type Payment method Economy 7 Regions Elec rate range (p/kWh) Contract Exit fee (per fuel) Details
Dual Fuel Monthly Direct Debit No 14 31.298 – 33.651 18 months £95.00 View regional prices
Dual Fuel Monthly Direct Debit Yes 14 34.751 – 40.322 18 months £95.00 View regional prices
Electricity Monthly Direct Debit No 14 31.298 – 33.651 18 months £95.00 View regional prices
Electricity Monthly Direct Debit Yes 14 34.751 – 40.322 18 months £95.00 View regional prices

Decision checklist

  • Pick the right fuel/service type first.
  • Keep the payment method the same across comparisons.
  • Only choose an Economy 7 row if your meter and usage pattern suit it.
  • Use your postcode to sense-check the regional prices.

Why regional rows matter

  • Standing charges and unit rates vary by PES region.
  • A tariff that looks cheap nationally may be less competitive in your area.
  • Regional differences can materially change annual cost estimates.

So Mongoose 18m against the Ofgem price cap, 1 October to 31 December 2026

So Mongoose 18m is on sale: a fixed tariff for 18 months, exit fee £95 per fuel. Against the Ofgem cap for 1 October to 31 December 2026 its electricity unit rate is above the cap in every region (by 5.52 to 6.44p/kWh) and its standing charge is below the cap in every region (by 4.93 to 10.35p a day). In London the unit rate is 32.70p against a 26.60p cap and the standing charge 32.57p a day against 42.92p; a home at Ofgem typical use (2,500 kWh of electricity and 9,500 kWh of gas a year, Direct Debit) could pay about £1,988 a year on this tariff against £1,706 at the cap (+£282), standing charges included.

Electricity unit rate, p/kWh and standing charge, p/day for each region against the Ofgem capElectricity unit rate, p/kWhStanding charge, p/daythis tariffOfgem cap25262728293031323334303540455055606570East MidlandsEast Midlands: 31.30p/kWh vs cap 25.36p (+5.94p)+5.94pEast Midlands: standing charge 44.10p/day vs cap 51.45p (−7.35p/day, −£27 a year)−7.35pNorth EastNorth East: 31.37p/kWh vs cap 25.46p (+5.91p)+5.91pNorth East: standing charge 53.91p/day vs cap 61.58p (−7.67p/day, −£28 a year)−7.67pWest MidlandsWest Midlands: 31.65p/kWh vs cap 25.60p (+6.05p)+6.05pWest Midlands: standing charge 48.84p/day vs cap 57.23p (−8.39p/day, −£31 a year)−8.39pYorkshireYorkshire: 31.83p/kWh vs cap 25.60p (+6.23p)+6.23pYorkshire: standing charge 52.15p/day vs cap 61.67p (−9.52p/day, −£35 a year)−9.52pSouth ScotlandSouth Scotland: 31.89p/kWh vs cap 26.11p (+5.78p)+5.78pSouth Scotland: standing charge 53.23p/day vs cap 61.41p (−8.18p/day, −£30 a year)−8.18pNorth ScotlandNorth Scotland: 31.98p/kWh vs cap 26.35p (+5.63p)+5.63pNorth Scotland: standing charge 47.83p/day vs cap 55.14p (−7.31p/day, −£27 a year)−7.31pSouthernSouthern: 31.99p/kWh vs cap 26.47p (+5.52p)+5.52pSouthern: standing charge 42.22p/day vs cap 47.81p (−5.59p/day, −£20 a year)−5.59pSouth WestSouth West: 32.20p/kWh vs cap 26.58p (+5.62p)+5.62pSouth West: standing charge 49.42p/day vs cap 55.58p (−6.16p/day, −£22 a year)−6.16pSouth EastSouth East: 32.40p/kWh vs cap 26.88p (+5.52p)+5.52pSouth East: standing charge 45.39p/day vs cap 52.32p (−6.93p/day, −£25 a year)−6.93pEasternEastern: 32.48p/kWh vs cap 26.61p (+5.87p)+5.87pEastern: standing charge 43.72p/day vs cap 51.84p (−8.12p/day, −£30 a year)−8.12pSouth WalesSouth Wales: 32.52p/kWh vs cap 26.55p (+5.97p)+5.97pSouth Wales: standing charge 48.07p/day vs cap 55.41p (−7.34p/day, −£27 a year)−7.34pLondonLondon: 32.70p/kWh vs cap 26.60p (+6.10p)+6.10pLondon: standing charge 32.57p/day vs cap 42.92p (−10.35p/day, −£38 a year)−10.35pNorth WestNorth West: 32.93p/kWh vs cap 26.49p (+6.44p)+6.44pNorth West: standing charge 40.75p/day vs cap 45.68p (−4.93p/day, −£18 a year)−4.93pMerseyside & N WalesMerseyside & N Wales: 33.65p/kWh vs cap 27.86p (+5.79p)+5.79pMerseyside & N Wales: standing charge 57.53p/day vs cap 67.66p (−10.13p/day, −£37 a year)−10.13p
RegionElec p/kWhCap p/kWhStanding p/dayCap p/dayStanding £/monthGas p/kWhGas capGas standing p/day£/yr typicalCap £/yrvs cap
East Midlands31.3025.3644.1051.4513.429.867.8224.451,9701,672+£298
North Eastern England31.3725.4653.9161.5816.409.867.9224.452,0071,722+£284
West Midlands31.6525.6048.8457.2314.859.997.9024.452,0081,708+£300
Yorkshire31.8325.6052.1561.6715.869.867.9024.452,0121,724+£287
Southern Scotland31.8926.1153.2361.4116.199.897.8724.452,0201,734+£287
Northern Scotland31.9826.3547.8355.1414.559.837.8724.451,9971,717+£280
Southern England31.9926.4742.2247.8112.8410.178.1724.452,0091,719+£291
South Western England32.2026.5849.4255.5815.039.988.1224.452,0231,746+£277
South Eastern England32.4026.8845.3952.3213.8110.008.0524.452,0151,735+£280
Eastern England32.4826.6143.7251.8413.309.877.9124.451,9991,713+£286
Southern Wales32.5226.5548.0755.4114.6210.088.0924.452,0351,744+£291
London32.7026.6032.5742.929.9110.148.1524.451,9881,706+£282
North Western England32.9326.4940.7545.6812.399.887.8624.452,0001,684+£316
Merseyside and Northern Wales33.6527.8657.5367.6617.509.877.9124.452,0781,805+£273
Source: this tariff's newest published rates in our tariff feed (snapshot 15 Oct 2026; electricity without VAT (zero-rated 1 Oct 2026 to 31 Mar 2027); gas including 5% VAT; Monthly Direct Debit, single-rate meter). Cap: Ofgem's regional price cap, 1 October to 31 December 2026, Direct Debit, single-rate, as published (https://www.ofgem.gov.uk/your-energy-supply/your-energy-bill/energy-price-cap-unit-rates-and-standing-charges). Annual figures are modelled at Ofgem typical use (2,500 kWh of electricity and 9,500 kWh of gas a year, Direct Debit), standing charges included, before any discounts or credits; what you pay depends on your usage and meter.

The cheapest fixed deal on the EnergyPlus panel today, against So Mongoose 18m and the cap

This tariff
£1,988
So Mongoose 18m · fixed, 18 months · exit fee £95 per fuel
Cheapest fixed deal on the EnergyPlus panel
£1,685.03
Fuse Energy · October 2026 Fixed (24m) V4 · fixed, 24 months · exit fee £50 per fuel (£100 dual fuel)
The cap for the same home
£1,706
Ofgem cap, London, 1 October to 31 December 2026 · Direct Debit, standard variable

On 15 Oct 2026 the cheapest fixed tariff on the EnergyPlus panel for a London home at Ofgem typical use was October 2026 Fixed (24m) V4 from Fuse Energy at £1,685.03 a year, −£303 against this tariff's modelled £1,988 and −£21 against the £1,706 cap; the cheapest of any type was So Green Tracker 12m from So Energy at £1,653.46 (tracker, 12 months, exit fee £50 per fuel). 18 fixed tariffs were quoted that day. Exit fees and contract lengths differ, so compare the row that matches your meter and payment method.

RegionThis tariff £/yrvs capvs cheapest fixedCap £/yrCheapest fixed on the panel (£/yr, exit per fuel, term)Quoted
Eastern England1,999+£286+£3011,713Fuse Energy · October 2026 Fixed (24m) V4 · £1,698.11 · exit £50 · 24m15 Oct
East Midlands1,970+£298+£3121,672Fuse Energy · October 2026 Fixed (24m) V4 · £1,658.06 · exit £50 · 24m15 Oct
London1,988+£282+£3031,706Fuse Energy · October 2026 Fixed (24m) V4 · £1,685.03 · exit £50 · 24m15 Oct
Merseyside and Northern Wales2,078+£273+£2961,805Fuse Energy · October 2026 Fixed (24m) V4 · £1,781.35 · exit £50 · 24m15 Oct
West Midlands2,008+£300+£3171,708Fuse Energy · October 2026 Fixed (24m) V4 · £1,690.85 · exit £50 · 24m15 Oct
North Eastern England2,007+£284+£3031,722Fuse Energy · October 2026 Fixed (24m) V4 · £1,703.81 · exit £50 · 24m15 Oct
North Western England2,000+£316+£3331,684Fuse Energy · October 2026 Fixed (24m) V4 · £1,667.30 · exit £50 · 24m15 Oct
Northern Scotland1,997+£280+£3031,717Fuse Energy · October 2026 Fixed (24m) V4 · £1,694.50 · exit £50 · 24m15 Oct
Southern Scotland2,020+£287+£3061,734Fuse Energy · October 2026 Fixed (24m) V4 · £1,714.07 · exit £50 · 24m15 Oct
South Eastern England2,015+£280+£2971,735Fuse Energy · October 2026 Fixed (24m) V4 · £1,717.34 · exit £50 · 24m15 Oct
Southern England2,009+£291+£3071,719Fuse Energy · October 2026 Fixed (24m) V4 · £1,702.20 · exit £50 · 24m15 Oct
Southern Wales2,035+£291+£3141,744Fuse Energy · October 2026 Fixed (24m) V4 · £1,721.68 · exit £50 · 24m15 Oct
South Western England2,023+£277+£2961,746Fuse Energy · October 2026 Fixed (24m) V4 · £1,727.01 · exit £50 · 24m15 Oct
Yorkshire2,012+£287+£3051,724Fuse Energy · October 2026 Fixed (24m) V4 · £1,706.23 · exit £50 · 24m15 Oct
Panel prices: the tariffs our comparison could switch a home to on 15 Oct 2026, as quoted by our tariff feed for each region at 2,500 kWh electricity and 9,500 kWh gas a year, Direct Debit, dual fuel, single-rate meter (electricity without VAT (zero-rated 1 Oct 2026 to 31 Mar 2027); gas including 5% VAT), bills = unit rate x kWh plus 365 days of standing charge per fuel, before sign-up credits; a day with fewer than 10 fixed tariffs falls back to the previous complete day. This tariff: its newest published rates in the same feed, modelled the same way. Cap: Ofgem regional rates, 1 October to 31 December 2026, Direct Debit. 'Cheapest' means cheapest on the EnergyPlus panel, not the whole market; prices change daily and a postcode quote shows the live figure.

So Mongoose 18m on an Economy 7 meter

Economy 7 version in London: 38.93p/kWh by day and 19.22p/kWh in the seven off-peak hours, which are set by your meter and network operator, not by the tariff; standing charge 32.90p a day. It costs less than this tariff's single-rate version (32.70p/kWh, 32.57p a day) once at least 32% of your electricity is used off-peak, modelled at 2,500 kWh a year; at 50% off-peak the Economy 7 version is −£89 a year.

Source: this tariff's newest two-rate and single-rate rows in our tariff feed (snapshot 15 Oct 2026; electricity without VAT (zero-rated 1 Oct 2026 to 31 Mar 2027); Monthly Direct Debit). Modelled from the rates with standing charges included; no off-peak clock times are stored for Economy 7, which depend on your meter.

Dual Fuel, Monthly Direct Debit, standard-rate: regional prices

Unit rates are shown in pence per kWh (p/kWh). Standing charges are shown in pence per day (p/day), calculated from the yearly figures. Use the row that matches your location when you switch.

PES region Elec rate (p/kWh) Elec standing (p/day) Gas rate (p/kWh) Gas standing (p/day) Contract Exit fee (per fuel) Switch
East Midlands 31.298 44.10 9.864 24.45 18 months £95.00 Switch to this tariff
Eastern England 32.485 43.72 9.874 24.45 18 months £95.00 Switch to this tariff
Merseyside & North Wales 33.651 57.53 9.866 24.45 18 months £95.00 Switch to this tariff
North East England 31.372 53.91 9.855 24.45 18 months £95.00 Switch to this tariff
North Scotland 31.977 47.83 9.829 24.45 18 months £95.00 Switch to this tariff
North West England 32.931 40.75 9.884 24.45 18 months £95.00 Switch to this tariff
South East England 32.397 45.39 9.997 24.45 18 months £95.00 Switch to this tariff
South East England 32.696 32.57 10.136 24.45 18 months £95.00 Switch to this tariff
South England 31.991 42.22 10.172 24.45 18 months £95.00 Switch to this tariff
South Scotland 31.887 53.23 9.892 24.45 18 months £95.00 Switch to this tariff
South Wales 32.523 48.07 10.078 24.45 18 months £95.00 Switch to this tariff
South West England 32.197 49.42 9.981 24.45 18 months £95.00 Switch to this tariff
West Midlands 31.651 48.84 9.992 24.45 18 months £95.00 Switch to this tariff
Yorkshire 31.833 52.15 9.855 24.45 18 months £95.00 Switch to this tariff

Dual Fuel, Monthly Direct Debit, Economy 7: regional prices

Unit rates are shown in pence per kWh (p/kWh). Standing charges are shown in pence per day (p/day), calculated from the yearly figures. Use the row that matches your location when you switch.

PES region Elec rate (p/kWh) E7 off-peak (p/kWh) Elec standing (p/day) Gas rate (p/kWh) Gas standing (p/day) Contract Exit fee (per fuel) Switch
East Midlands 39.588 16.506 44.44 9.864 24.45 18 months £95.00 Switch to this tariff
Eastern England 39.431 18.348 44.05 9.874 24.45 18 months £95.00 Switch to this tariff
Merseyside & North Wales 39.514 19.917 57.87 9.866 24.45 18 months £95.00 Switch to this tariff
North East England 34.751 20.928 54.24 9.855 24.45 18 months £95.00 Switch to this tariff
North Scotland 36.313 19.608 48.16 9.829 24.45 18 months £95.00 Switch to this tariff
North West England 36.837 20.877 41.08 9.884 24.45 18 months £95.00 Switch to this tariff
South East England 40.322 17.367 45.73 9.997 24.45 18 months £95.00 Switch to this tariff
South East England 38.926 19.220 32.90 10.136 24.45 18 months £95.00 Switch to this tariff
South England 36.367 20.248 42.55 10.172 24.45 18 months £95.00 Switch to this tariff
South Scotland 35.249 20.378 53.56 9.892 24.45 18 months £95.00 Switch to this tariff
South Wales 34.851 22.285 48.40 10.078 24.45 18 months £95.00 Switch to this tariff
South West England 36.915 19.787 49.76 9.981 24.45 18 months £95.00 Switch to this tariff
West Midlands 37.147 19.447 49.17 9.992 24.45 18 months £95.00 Switch to this tariff
Yorkshire 37.040 20.007 52.49 9.855 24.45 18 months £95.00 Switch to this tariff

Electricity, Monthly Direct Debit, standard-rate: regional prices

Unit rates are shown in pence per kWh (p/kWh). Standing charges are shown in pence per day (p/day), calculated from the yearly figures. Use the row that matches your location when you switch.

PES region Elec rate (p/kWh) Elec standing (p/day) Contract Exit fee (per fuel) Switch
East Midlands 31.298 44.10 18 months £95.00 Switch to this tariff
Eastern England 32.485 43.72 18 months £95.00 Switch to this tariff
Merseyside & North Wales 33.651 57.53 18 months £95.00 Switch to this tariff
North East England 31.372 53.91 18 months £95.00 Switch to this tariff
North Scotland 31.977 47.83 18 months £95.00 Switch to this tariff
North West England 32.931 40.75 18 months £95.00 Switch to this tariff
South East England 32.397 45.39 18 months £95.00 Switch to this tariff
South East England 32.696 32.57 18 months £95.00 Switch to this tariff
South England 31.991 42.22 18 months £95.00 Switch to this tariff
South Scotland 31.887 53.23 18 months £95.00 Switch to this tariff
South Wales 32.523 48.07 18 months £95.00 Switch to this tariff
South West England 32.197 49.42 18 months £95.00 Switch to this tariff
West Midlands 31.651 48.84 18 months £95.00 Switch to this tariff
Yorkshire 31.833 52.15 18 months £95.00 Switch to this tariff

Electricity, Monthly Direct Debit, Economy 7: regional prices

Unit rates are shown in pence per kWh (p/kWh). Standing charges are shown in pence per day (p/day), calculated from the yearly figures. Use the row that matches your location when you switch.

PES region Elec rate (p/kWh) E7 off-peak (p/kWh) Elec standing (p/day) Contract Exit fee (per fuel) Switch
East Midlands 39.588 16.506 44.44 18 months £95.00 Switch to this tariff
Eastern England 39.431 18.348 44.05 18 months £95.00 Switch to this tariff
Merseyside & North Wales 39.514 19.917 57.87 18 months £95.00 Switch to this tariff
North East England 34.751 20.928 54.24 18 months £95.00 Switch to this tariff
North Scotland 36.313 19.608 48.16 18 months £95.00 Switch to this tariff
North West England 36.837 20.877 41.08 18 months £95.00 Switch to this tariff
South East England 40.322 17.367 45.73 18 months £95.00 Switch to this tariff
South East England 38.926 19.220 32.90 18 months £95.00 Switch to this tariff
South England 36.367 20.248 42.55 18 months £95.00 Switch to this tariff
South Scotland 35.249 20.378 53.56 18 months £95.00 Switch to this tariff
South Wales 34.851 22.285 48.40 18 months £95.00 Switch to this tariff
South West England 36.915 19.787 49.76 18 months £95.00 Switch to this tariff
West Midlands 37.147 19.447 49.17 18 months £95.00 Switch to this tariff
Yorkshire 37.040 20.007 52.49 18 months £95.00 Switch to this tariff

Costs, exclusions and common pitfalls to check

Most mistakes happen when the wrong regional or payment-type version of the tariff is compared. Use these checks before switching.

1) Region matters

There are separate regional records because energy pricing differs across PES areas. Do not assume a headline price applies nationally.

2) Payment method affects price

Direct Debit, bill payment and prepayment variants can differ materially. Compare like-for-like only.

3) Economy 7 is usage-sensitive

Economy 7 can help if enough usage is overnight, but can cost more overall if most use is daytime.

4) Fuel bundle changes the comparison

Dual fuel should not be compared directly with electricity-only rows unless you normalise the usage assumptions.

5) Exit fees reduce flexibility

Records shown for this tariff include exit fees of up to £95.00 per fuel. Check the exact regional row before switching.

6) Postcode still beats region-only estimates

Region is useful for guidance, but a postcode-based quote is more precise because it reflects the actual tariff availability and pricing for your home.

Helpful shortcut: if you are not sure this is the right product family, compare all So Energy tariffs before drilling into the regional tables.

So Mongoose 18m: FAQs

Why are there so many records for the same tariff name?

Because the tariff can vary by service type, payment method, Economy 7 status and region. This page groups them together so you can compare them in one place.

Are prices for So Mongoose 18m the same in every region?

No. This page includes region-level records because unit rates and standing charges differ across PES regions. Your postcode is still the best way to confirm what you would actually pay.

Does So Mongoose 18m come with Economy 7?

Yes. At least one Economy 7 option group is currently listed on this page, with separate day and off-peak unit rates shown per region.

Can I get So Mongoose 18m as electricity-only, gas-only or dual fuel?

Current records show these service types: Dual Fuel, Electricity. Availability still depends on your home and supplier rules.

How do I switch to the exact regional option I want?

Use the grouped comparison table to find the right option type, then choose the regional row below it that matches your area and click the switch link.

Can I compare this with other tariffs from the same supplier?

Yes. Visit the So Energy tariffs page to compare other current products from the same supplier.

Will switching affect my supply?

In normal circumstances, no. The switch is administrative and your supply continues while the new tariff is set up.

Trust, methodology and related pages

Page details

Supplier
So Energy
Tariff family
So Mongoose 18m
Regions shown
13
Page type
Canonical tariff family page

How we assess So Mongoose 18m

  • Grouped tariff view: we group records with the same tariff name into one page to avoid duplicate pages and to make comparison easier.
  • Regional realism: we show multiple PES-region records because energy prices vary by area.
  • Like-for-like comparison: we encourage comparison using the same payment method, service type and meter assumptions wherever possible.
  • Rate transparency: we show actual unit rates (p/kWh) and standing charges (p/day) so you can estimate costs using your own usage figures.
  • Availability caveat: the exact tariff you can join may still depend on your postcode and supplier eligibility checks.

Explore more from So Energy

We recommend checking the supplier's tariff information and product terms before you switch, as regional availability and rates can change quickly.

Ready to compare So Mongoose 18m with the market?

Get estimated prices using your postcode and meter details, then choose the exact regional tariff option that matches your home.

Get your energy quote See all So Energy tariffs


Updated on 15 Oct 2026