If you are building a budgeting system and want a clear sequence for saving and spending control, start with the Budgeting Hub.
Most household bills automatically increase when your deal ends, moving you to the provider’s most expensive default tariff. Switching regularly is one of the easiest ways to save money — and the process is usually straightforward and handled by the new provider.
Read more: See our Cost Of Living guide for a complete overview of this topic.
Energy (Gas & Electricity)
When to Switch
- When your fixed deal ends and you move to the standard variable tariff (SVT)
- When cheaper deals become available (check every few months)
- When your usage changes (e.g. working from home, new EV)
How to Switch
- Find your current tariff name and annual usage (on your bill or supplier’s app)
- Compare deals on Ofgem-accredited comparison sites — Uswitch, Compare the Market, MoneySupermarket
- Choose a new deal (usually a fixed-rate tariff)
- The new supplier handles the switch — usually takes 5 working days for a standard switch
- There is a 14-day cooling-off period if you change your mind
Typical Savings
| Scenario | Typical Annual Saving |
|---|---|
| SVT → best fixed deal | £100–£400 |
| Expired fixed deal → new fix | £50–£200 |
| No change (already on good fix) | £0 (stay put) |
Important: Currently, energy prices are regulated by the Ofgem price cap. Savings depend on market conditions — sometimes fixed deals are not cheaper than the cap.
Broadband
When to Switch
Broadband contracts typically last 18–24 months. When yours expires, the price usually increases by £5–£15/month.
How to Switch
- Note when your contract ends (check your bill or call your provider)
- Compare deals on broadband comparison sites — consider speed, data allowance, and contract length
- Negotiate first — call your current provider and ask for a retention deal. Many match or beat competitors’ prices
- If not satisfied, switch — the new provider manages the transfer
Typical Savings
| Switch | Typical Monthly Saving |
|---|---|
| Out-of-contract → new deal (same provider) | £5–£15 |
| Out-of-contract → new provider | £10–£20 |
| Annual saving | £60–£240 |
Negotiation Script
“Hi, my contract is ending on [date] and I’ve seen [competing provider] offering a similar package for [price]. I’d like to stay but I need a competitive deal. What can you offer?”
This works more often than you might expect. Providers would rather keep you at a discount than lose you entirely.
Mobile Phone
SIM-Only vs Contract
The biggest mobile saving comes from switching to SIM-only once your handset contract ends:
| Plan Type | Typical Monthly Cost | Data |
|---|---|---|
| Handset contract | £30–£60 | Varies |
| SIM-only (12 month) | £8–£15 | 10–100GB |
| SIM-only (30 day) | £6–£12 | 5–50GB |
Annual saving from switching: £200–£500 if moving from a handset contract to SIM-only.
If you need a new phone, consider buying it outright (or on 0% finance) and pairing it with a cheap SIM-only deal — often cheaper overall than a bundled contract.
Car Insurance
Never auto-renew car insurance. See our car insurance guide.
How to Save
- Compare prices 3–4 weeks before renewal (not earlier — quotes are priced for the start date)
- Use multiple comparison sites — not all insurers appear on all sites
- Increase your voluntary excess (if you can afford a higher claim excess)
- Check telematics/black box policies — especially valuable for young drivers
- Pay annually instead of monthly — monthly payments typically add 15–25% APR
Typical Savings
| Action | Potential Saving |
|---|---|
| Compare and switch | £50–£200 |
| Increase voluntary excess | £20–£50 |
| Pay annually | £30–£80 |
| Add security features | £10–£30 |
Home Insurance
Similar to car insurance — compare annually using comparison sites. See our home insurance.
TV and Streaming
Review Your Subscriptions
| Service | Monthly Cost | Action |
|---|---|---|
| Sky TV | £25–£50+ | Negotiate at contract end, or switch to streaming |
| Netflix | £5–£18 | Downgrade plan or rotate with other services |
| Amazon Prime | £8.99 | Worth it if you use delivery and Prime Video |
| Disney+ | £5–£11 | Consider annual plan for discount |
| Multiple services | £40–£80 total | Rotate — subscribe to one at a time |
Rotation strategy: Instead of paying for four streaming services simultaneously, subscribe to one for a month, watch what you want, cancel, move to the next.
Switching Calendar
Set reminders for these key dates:
| Bill | When to Review | Lead Time |
|---|---|---|
| Energy | When fixed deal ends | 4–6 weeks before |
| Broadband | When contract ends | 4 weeks before |
| Mobile | When contract ends | 4 weeks before |
| Car insurance | Annual renewal | 3–4 weeks before |
| Home insurance | Annual renewal | 3–4 weeks before |
| TV/streaming | Monthly review | Cancel anytime |
| Council tax | Annual (April) | Check discounts once |
Total Potential Savings
| Bill | Low Estimate | High Estimate |
|---|---|---|
| Energy | £100 | £400 |
| Broadband | £60 | £240 |
| Mobile | £100 | £500 |
| Car insurance | £50 | £200 |
| Home insurance | £30 | £100 |
| TV/streaming | £50 | £300 |
| Total | £390 | £1,740 |
Most households can realistically save £500–£1,000/year by switching bills regularly. Combine this with cashback sites and our other money saving tips for maximum impact.
Related hub: Telecoms and Household Bills UK — detailed guides for every telecoms bill.