Household bills are easier to reduce when you review them as a yearly system rather than chasing one-off offers. This checklist shows how to audit energy, broadband, mobile, insurance, subscriptions and water costs, compare the full cost of each option, and record renewal dates so you can act at the right time.
Overview
A useful household bills review has three goals: establish what you currently pay, identify which costs can change, and decide whether a saving is worth the effort or any loss of flexibility. The cheapest headline price is not always the lowest overall cost. Installation charges, equipment fees, excesses, usage limits, contract length, introductory pricing and cancellation terms can all change the result.
Begin with a list of regular outgoing payments. Include direct debits, card payments and annual renewals, not just monthly bills. Common categories include:
- Energy, including electricity and gas where applicable.
- Broadband, landline and television packages.
- Mobile phone contracts, SIM-only plans and additional data charges.
- Buildings, contents, car, pet and other insurance policies.
- Streaming services, software, memberships and other subscriptions.
- Water and sewerage charges, where applicable.
- Bank fees, credit commitments and other recurring household payments.
For each item, record the provider, payment amount, payment frequency, contract end date, renewal date and any usage limit. If a bill varies, use the last 12 months where available. This gives you a more realistic annual baseline than multiplying one unusually low or high month by 12.
For more detailed guidance on comparing broadband, energy and insurance, see the UK household bills savings guide. The aim is not to switch everything at once. Prioritise large or recurring costs, then deal with smaller subscriptions during the same review.
How to estimate
Convert every cost to an annual figure before comparing providers. Use these simple formulas:
- Monthly cost: monthly payment × 12.
- Quarterly cost: quarterly payment × 4.
- Annual cost spread monthly: annual payment ÷ 12.
- Total contract cost: setup fees + all scheduled payments + expected usage charges − guaranteed discounts.
- Estimated saving: current annual cost − proposed annual cost.
When comparing a new deal, separate fixed charges from usage-based charges. For example, an energy or mobile plan may have a standing or access cost plus a charge linked to consumption. Use your own recent usage where possible rather than relying only on a representative example.
Broadband comparisons should include the complete minimum-term cost, any activation or delivery fee, equipment charges, and the price after an introductory period. A lower first-month price may not produce a lower annual cost. Check the speed, data allowance, contract length and exit conditions as well as the monthly amount.
Insurance needs a similar approach. Compare the annual premium, policy excess, cover limits, exclusions and optional extras. A cheaper policy can be poor value if it removes cover you need or introduces an excess you could not comfortably pay. Do not cancel an existing policy until replacement cover is confirmed and the start date is clear.
For subscriptions, calculate the cost per year and ask whether you used the service during the previous month or quarter. If you want to retain it, check whether a less expensive tier, annual payment or household plan suits your actual use. Treat a discount as a saving only if you would have paid for the service anyway.
Inputs and assumptions
Create a bill-audit worksheet with one row per service. These columns are enough for most households:
| Item | Current cost | Annual cost | Review date | Action |
|---|---|---|---|---|
| Broadband | Monthly payment | Monthly × 12 | Contract end or price-change date | Compare total-term cost |
| Insurance | Annual premium | Annual premium | Renewal date | Compare cover and excess |
| Mobile | Monthly payment | Monthly × 12 | Contract end date | Check usage and alternatives |
| Subscriptions | Monthly or annual payment | Convert to annual | Next payment date | Keep, downgrade or cancel |
Record assumptions beside the figures. Examples include expected data use, broadband speed required for work, the number of people using a subscription, estimated energy consumption and whether a policy must cover a particular item. This prevents a purely numerical comparison from ignoring the service you actually need.
Check whether a proposed saving depends on paying upfront, accepting a longer contract or using a new payment method. Also check whether a discount is temporary. Write down the price that applies after the offer ends, because that is the figure most likely to affect future budgeting.
For water, first establish which charging method applies to your home and whether usage can be measured. The practical options may differ by property and area, so compare the available arrangements rather than assuming that a change will reduce the bill. For energy, focus on both the tariff and consumption: draught-proofing, sensible heating controls, efficient appliance use and avoiding wasted standby energy can support savings without relying on a provider switch.
Worked examples
The following examples use invented figures to demonstrate the method, not to suggest current UK prices.
Example 1: broadband
Suppose a household pays £38 per month for broadband and has 10 months left on its current term. Its simple annualised cost is £456. A proposed alternative costs £25 per month for six months, then £42 per month for the remaining six months, with a one-off £20 setup fee.
The first-year estimate is: (6 × £25) + (6 × £42) + £20 = £422. The apparent saving is £34 against the current annualised cost. Before switching, the household should confirm that the speed, contract length, equipment and cancellation arrangements meet its needs. If an early-exit charge applies, add it to the proposed cost before deciding.
Example 2: subscriptions
A household has four subscriptions costing £9, £12, £6 and £15 per month. The combined annual cost is (£9 + £12 + £6 + £15) × 12, or £504. If the £6 service was used only once in the past three months and can be cancelled without a fee, removing it would reduce the annual cost by £72. That is a repeatable saving, unlike a one-off voucher.
Example 3: insurance
Assume a current policy costs £310 per year with a £150 excess. An alternative costs £275 with a £400 excess. The premium difference is £35, but the alternative could require the household to contribute substantially more if it makes a claim. Compare the cover limits, exclusions and excess before treating the lower premium as a genuine improvement.
When a comparison produces a small saving, consider the practical cost of changing provider, including time, installation disruption, administration and the risk of losing a useful feature. A larger recurring saving usually deserves priority, but a smaller saving may still be worthwhile if cancellation is simple and the replacement service is equivalent.
When to recalculate
Schedule a full household bills review once a year, ideally several weeks before the first major renewal date. Recalculate sooner when a contract ends, a temporary discount expires, a provider announces a price change, household usage changes, or someone moves in or out. Revisit mobile and broadband plans after changes in working patterns, school or university arrangements, or streaming habits.
Use a renewal-date tracker with reminders at least one month before each decision point. For insurance and other important cover, allow enough time to compare like-for-like policies rather than accepting an automatic renewal without checking the terms. For fixed-term services, read the provider’s communications carefully so you know when the price or contract status changes.
Your next action can be completed in 30 minutes:
- Download or gather the latest statements for every recurring household bill.
- Write each cost as an annual figure and note the next review date.
- Circle the three largest flexible costs and any subscription you rarely use.
- Compare total contract costs, not just introductory monthly prices.
- Record the expected saving, the assumptions behind it and the date to check it again.
Keep the worksheet for the next review. A consistent record makes price changes easier to spot and turns bill switching into a repeatable household habit rather than a rushed reaction to a renewal notice.
