Cheapest energy tariff to switch to after the Ofgem review
A practical UK guide to finding the cheapest available tariff for your home after Ofgem’s latest review—what’s changed, what to check, and how to switch safely.
- See what “cheapest” really means for your meter, region and payment method
- Compare fixes vs variable tariffs (with realistic, UK-style examples)
- Switch with confidence: exit fees, smart meters, prepay and moving home covered
Estimates only. The cheapest tariff depends on your region, meter type, usage, and payment method. Availability and prices can change daily.
Fast answer: what’s the cheapest energy tariff after the Ofgem review?
There isn’t one single “cheapest tariff” for everyone after an Ofgem review. The cheapest option for you depends on your region (distribution area), meter type (single-rate, Economy 7, smart time-of-use, prepay), payment method (Direct Debit vs pay on receipt), and annual usage.
In practice, the cheapest switch is usually either:
A competitive fixed tariff
Often cheaper than the Standard Variable Tariff (SVT) if suppliers price below the cap level. Best for budget certainty, but check exit fees and fix length.
A low-cost variable / tracker-style tariff
Can be cheaper short-term, but prices can move with the market. Useful if you want flexibility and are happy to review regularly.
Key takeaway: after Ofgem changes, focus on the unit rates (p/kWh), standing charges (p/day), and the tariff’s terms (exit fees, smart meter requirement, payment method). “Cheapest” is the lowest estimated annual cost for your home.
Good time to check: when your fix ends, you move home, your Direct Debit changes, or your usage shifts (new baby, WFH, EV, heat pump).
Avoid switching blind: if you’re on prepay, Economy 7, or a smart time-of-use tariff—compare on the right meter type.
Don’t assume: the lowest unit rate is best—standing charges can outweigh it for low users.
How to find the cheapest tariff for your home (after the Ofgem review)
Ofgem reviews and updates can change how tariffs are priced and presented, but your best move is still the same: compare using your real details and check the total estimated annual cost under your meter type.
- Gather the 4 essentials: postcode, current supplier, current tariff (if known), and your usage in kWh (or your annual cost).
- Confirm your meter setup: single-rate vs Economy 7; smart meter (SMETS1/SMETS2); prepay; any in-home display.
- Compare like-for-like: same payment method (Direct Debit vs pay on receipt) and the same contract length where possible.
- Check the “gotchas”: exit fees, price guarantees, smart meter requirements, and eligibility restrictions.
- Switch early if you’re nearing the end of a fix: many suppliers let you line up a switch before your end date; confirm your current provider’s rules.
Quick caveat: “Ofgem review” can refer to different updates (price cap adjustments, rules on switching, standing charge approaches, smart standards). This page focuses on what you can do: compare the cheapest available tariffs and switch safely based on today’s prices and your circumstances.
Two realistic UK scenarios (with numbers)
Scenario A: low-to-medium user in a flat (single-rate)
Assume: 1–2 bed flat, 1,800 kWh electric / 8,000 kWh gas per year, Direct Debit, single-rate electricity.
Estimated impact: a tariff with a slightly higher unit rate but a lower standing charge can work out cheaper than a headline “low unit rate” tariff—because standing charges hit you every day.
Scenario B: family home with higher usage (gas-heavy)
Assume: 3–4 bed house, 3,100 kWh electric / 14,000 kWh gas per year, Direct Debit.
Estimated impact: for higher users, a tariff with lower unit rates often matters more than a small standing charge difference. A 1p/kWh change can add up materially over the year.
Assumptions used in scenarios: We’re illustrating how tariff structures affect different households, not quoting a live price. Use your own kWh (from bills or your online account) for a meaningful result.
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Tip: If you have your annual usage in kWh from your latest bill, keep it handy. Comparing on kWh is typically more accurate than comparing on monthly Direct Debit.
Compare tariff types (and who they’re for)
After an Ofgem review, headlines can be noisy. This table helps you choose based on how you actually use energy and how much certainty you want.
| Tariff type | How pricing works | When it can be “cheapest” | Watch-outs |
|---|---|---|---|
| Standard Variable Tariff (SVT) | Price can change; typically follows the Ofgem price cap level (where applicable). | If fixes are priced high, SVT may be the least-bad default. | Less budget certainty. Not always the lowest available option. |
| Fixed (12–24 months) | Unit rates & standing charges locked for the fix term. | When suppliers price aggressively below expected future cap levels. | Exit fees; might miss future drops; eligibility/payment-method differences. |
| Tracker / market-linked | Price can move frequently based on a published formula/index. | When wholesale costs fall and the tracker passes through reductions. | Less certainty; understand the formula, caps, and notice periods. |
| Time-of-use (smart meter) | Different rates by time (e.g., off-peak vs peak); requires smart meter. | If you can shift usage (EV charging, appliances) into cheaper hours. | Peak rates may be higher; not ideal if you can’t shift usage. |
| Prepayment (PPM) | Pay-as-you-go; prices and availability differ from credit meters. | If you need tight control of spending; some competitive PPM deals exist. | Fewer tariff choices; debt recovery settings; topping up practicality. |
Decision checklist: who switching to the “cheapest” tariff suits (and who it doesn’t)
Switching to a cheaper tariff usually suits you if:
- You’re on SVT and can see cheaper fixes/tracker tariffs available for your postcode
- Your fix is ending in the next 4–8 weeks (time to line up a move)
- You pay by Direct Debit and can pass credit checks (where required)
- You’re happy to review your tariff at least once or twice a year
Be more cautious (or get advice) if:
- You’re in debt to your current supplier (switching may be restricted)
- You’re on Economy 7 or time-of-use and unsure of your day/night split
- You rent and don’t know whether you’re responsible for the bills
- You’re on prepay and rely on specific top-up methods
- You’re moving home soon (a long fix with exit fees may not be ideal)
Reminder: The Ofgem price cap is not a cap on your total bill, and it doesn’t mean SVT is always best. It limits the price of energy per unit and standing charge (for typical tariffs), but your usage still drives the total.
Costs, exclusions and common pitfalls (UK-specific)
If you’re switching after an Ofgem review, these are the details that most often explain why a “cheap” deal doesn’t stay cheap.
Standing charges vary by region
Your postcode affects network costs. Two homes with identical usage can see different cheapest tariffs.
Payment method changes prices
Direct Debit tariffs are often cheaper than paying on receipt. Always compare using your preferred payment method.
Exit fees can wipe out savings
Fixed tariffs may charge per fuel to leave early. If you might move, check the fee and the supplier’s moving-home policy.
Economy 7 / two-rate pitfalls
- Some “cheap” tariffs assume single-rate; E7 needs day and night rates to be compared correctly.
- If your night usage is low, E7 can cost more than a single-rate tariff.
- Storage heaters and immersion heaters can change the best option dramatically.
Smart meter & time-of-use pitfalls
- Time-of-use tariffs can be great for EVs, but peak rates may be higher.
- Check whether a smart meter is required and whether the tariff needs half-hourly readings.
- If you can’t shift usage, a standard single-rate tariff may be cheaper overall.
Common misconception: “Cheapest per month” isn’t always cheapest. Direct Debits are often set to smooth payments across the year and may not match your true monthly usage.
What you might be excluded from (and why)
Prepay restrictions: fewer tariffs, and some deals are credit-meter only.
Debt blocks: if you owe your current supplier above certain thresholds, switching may be limited until it’s resolved.
Complex meters: some legacy meter types need specialist handling; not every supplier supports them.
FAQs
Does the Ofgem price cap mean the SVT is the cheapest?
No. The price cap limits typical SVT unit rates and standing charges (where applicable), but some suppliers may offer fixed or tracker tariffs below those levels. The cheapest option depends on your postcode, usage, meter type and payment method.
Can I switch energy supplier if I rent?
Usually yes—if you pay the bills and your tenancy allows it. If bills are included in rent, you typically can’t switch the supplier because you’re not the account holder. If in doubt, check your tenancy agreement or ask the landlord/agent.
Will switching interrupt my gas or electricity supply?
A normal supplier switch should not interrupt supply. Your energy still comes through the same pipes and wires; only the billing supplier changes. You may be asked for meter readings around the switch date.
Can I switch if I’m in debt to my current supplier?
Sometimes. Debt can restrict switching (especially for prepayment). If you’re struggling, speak to your supplier first and consider free, independent help from Citizens Advice. You may be able to agree a repayment plan.
What if I have a smart meter—can I still switch?
Yes. Smart meters are designed to support switching. In some cases, smart functionality can be affected temporarily depending on meter type and supplier systems, but this has improved significantly over time. If you’re choosing a time-of-use tariff, check the requirement for half-hourly readings.
Is it better to fix for 12 or 24 months after an Ofgem review?
It depends on your risk tolerance and what’s available now. A longer fix can offer more budget certainty but may leave you paying above-market if prices fall. A shorter fix can be more flexible but may require you to review and switch again sooner. Always check exit fees.
How do I know if I’m on Economy 7 and whether it’s still worth it?
Look for two electricity readings (day/night) on your bill, or two unit rates. Whether it’s worth it depends on how much electricity you use overnight (often 30–40%+ is a rough benchmark, but it varies by tariff). If you’re unsure, compare both an E7 tariff and a single-rate tariff using your actual day/night kWh.
What details should I check before I switch to the “cheapest” tariff?
Check: unit rates and standing charges for your region, tariff end date, exit fees, payment method rules, any discounts/conditions, and whether the tariff is compatible with your meter (prepay, Economy 7, smart/time-of-use).
Trust, editorial standards and methodology
How we assess “cheapest” on EnergyPlus
- Our definition
- “Cheapest” means the lowest estimated annual cost for your property and tariff preferences, using unit rates (p/kWh) and standing charges (p/day) that apply to your region and payment method.
- Inputs that matter most
- Postcode (region/network), meter type (single-rate, Economy 7, smart time-of-use, prepay), payment method (Direct Debit vs other), and your estimated annual usage in kWh (or bill-based estimate).
- What we don’t do
- We don’t promise a specific saving, and we don’t assume a tariff is best just because it’s popular. We also avoid “one size fits all” claims—energy pricing is highly household-specific.
- Limitations to be aware of
- Tariffs can change quickly; some deals are limited by eligibility, meter compatibility, or supplier acceptance. Estimated annual costs depend on the usage figure provided and may differ from your actual bill.
Sources and further reading (UK)
- Ofgem (UK energy regulator) — price cap, switching rules, and consumer protections
- Citizens Advice: Energy — independent help on bills, debt, and complaints
- GOV.UK: Help to Heat and energy grants — support schemes and official guidance
Editorial note: We aim to keep this guide current, but if you’re reading during a fast-moving period (cap changes, supplier launches/withdrawals), treat “cheapest” as time-sensitive and re-check your comparison before switching.
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