Cashback, Vouchers and "Free" Gifts: What They Are Genuinely Worth
Cashback, vouchers and "free" gifts are the most reliable way a broadband deal can look cheaper than it is. Not because they are fake, but because a promise you have to act on costs the seller less than a discount you do not. This guide sets out why these offers exist, what the advertising and consumer rules actually require, the deadlines that catch people out, and a way of pricing any offer honestly before you sign.
The short version
- An automatic bill credit is worth its face value. A claim is not. The difference is the whole subject.
- The thing to distrust is your estimate of the hassle, not your memory. That is what the best available evidence actually shows.
- "Free" is a regulated word. Since 6 April 2025 it is a banned practice to call something free if you have to pay anything for it beyond delivery.
- The closing date and the claim instructions are "significant conditions" under the advertising code, so they should be in the ad or one click away.
- A prepaid card is not cash. Expiry, restricted use and stranded balances all cut its real value.
Why does a £100 cashback offer exist at all?
Direct answer: because a reward you have to claim is cheaper for the seller than a discount of the same size, and the gap between the two is pure margin.
This is not a suspicion. It has been measured. In May 2026 terms the best evidence available is a field experiment published in the American Economic Journal: Economic Policy, run across a large European online retailer, testing what happens when you change how hard a rebate is to claim (Rodemeier, 2025).
The finding is more interesting than "people forget". Consumers turn out to be good at predicting their own forgetfulness. When the retailer offered a reminder, demand rose, exactly as you would expect from people who know they might otherwise let it slip. But when the retailer made the claim process harder, demand did not fall at all.
Two ways a claim can fail, and how well people see them coming
Field experiment across a large European online retailer. Source: Rodemeier, 2025.
Offered a reminder, people bought more. They correctly priced in the chance that they would otherwise forget. The study describes consumers as fully sophisticated about this.
When claiming was made harder, demand did not move. The study describes consumers as fully naive about hassle, underestimating the effort of redeeming by around €20 per person.
The commercial consequence. Exploiting that single misperception more than doubled the profitability of the rebate compared with an equivalent automatic discount. That is the reason the offer is structured as a claim rather than a price cut.
Read that across to a broadband order and the practical advice inverts what most people assume. You do not need to worry much about whether you will remember; you already discount for that. You need to worry about whether you have honestly estimated how irritating the claim will be in eight months' time, on a portal you have never seen, with a bill you may have deleted.
Is there real data on how many people fail to claim?
Direct answer: not for UK broadband, and we are not going to pretend otherwise.
You will find "40% to 60% of rebates go unclaimed" repeated widely. We could not trace that range to any primary source. It appears to originate in American marketing-industry commentary about mail-in rebates on physical goods, and it is recycled without attribution. No UK regulator publishes broadband redemption rates, and providers do not disclose them.
Why the gap itself matters
Redemption rates are the single most useful number a consumer could have when valuing one of these offers, and it is the one number nobody has to publish. That asymmetry is not an accident. Until it changes, the sensible response is to assume nothing about the average and price your own worst case instead.
What are you actually being offered?
Direct answer: five quite different things, which are routinely presented as if they were interchangeable. They are not, and the difference is who carries the risk.
| What it is | How you get it | Who carries the risk | Worth its face value? |
|---|---|---|---|
| Automatic bill credit | Appears on your bill without you doing anything | The provider | Yes |
| Reduced monthly price | Built into the price you agreed | The provider | Yes |
| Cashback on claim | You submit a claim in a fixed window, often months after you join | You | No |
| Prepaid reward card | Claim, then wait, then spend within limits | You, twice | No |
| Physical gift or voucher | Sent to you, or redeemed with a third party | Shared | Only if you wanted it anyway |
That last row deserves a sentence of its own. A gift you would never have bought is not worth its retail price to you. It is worth whatever you would genuinely have paid for it, which for most unwanted electronics is a good deal less than the number on the advert.
When is a "free" gift legally not free?
Direct answer: whenever you had to pay anything for it beyond unavoidable delivery, or whenever its cost was already inside the package price. Both are now explicitly out of bounds.
Since 6 April 2025, the unfair commercial practices provisions of the Digital Markets, Competition and Consumers Act 2024 have replaced the Consumer Protection from Unfair Trading Regulations 2008 (Competition and Markets Authority, 2025). Schedule 20 of that Act lists 32 practices considered unfair in all circumstances, meaning the regulator does not have to prove the practice changed anyone's decision. Four of them bear directly on reward offers.
| Banned practice | What it means for a reward offer |
|---|---|
| Schedule 20, para 23 The "free" rule | Describing something as "gratis", "free", "without charge" or similar is banned if you have to pay anything other than the unavoidable cost of responding and collecting or paying for delivery. |
| Schedule 20, para 22 The claim-costs-money rule | Creating the false impression that you will win a benefit is banned where claiming it requires you to pay money or incur a cost. |
| Schedule 20, para 7 The fake deadline rule | Falsely saying an offer is only available for a limited time, in order to force an immediate decision and deny you time to choose properly, is banned. |
| Schedule 20, para 11 The your-rights-are-not-a-perk rule | Presenting rights you already have by law as a distinctive feature of the offer is banned. A "free 14-day money-back guarantee" is not a gift. |
The advertising code moves in step. The CAP Code was amended in response to the same Act with effect from 7 April 2025, and rule 3.23 says an ad must not describe a product as "free" if the consumer has to pay anything other than the unavoidable cost of responding and delivery (Advertising Standards Authority, 2025). Three refinements matter here:
- No dressing up the fees. Packaging, packing, administration, handling and insurance charges cannot be passed on, and postage must not be inflated to cover the giveaway.
- No raising the price to pay for the gift. If the cost of the thing you must buy has gone up, the extra is not free.
- No shrinking the gift. A "free" item must not be smaller or lower quality than the version you would otherwise buy.
Two older rulings give you the arithmetic test in its clearest form. A camera advertised at £179.99 with a "free 16GB SD card" was ruled misleading because the same camera was on sale at the same time, without the card, for £159.99 (Advertising Standards Authority, 2018). A television at £1,999 with a "FREE" soundbar was ruled against because the television had previously sold on its own for £1,749. In both cases the maths, not the wording, settled it.
The subtler version is worth knowing too. In December 2023 the ASA ruled against an on-pack promotion offering a "FREE ADULT TICKET" with the purchase of a full price on-the-day ticket, because the ad did not disclose that cheaper advance tickets existed at roughly half the price. The maximum real saving was around £10, not the price of a ticket (Advertising Standards Authority, 2023). The gift was real. The saving was not.
What does the law now say about the headline price?
Direct answer: the total price has to be up front. Mandatory charges cannot be revealed as you move through the order.
The same Act made drip pricing a banned practice from 6 April 2025. Traders must give the total price in any invitation to purchase, including all mandatory fees, taxes and charges you have to pay; where that is genuinely not possible, they must explain clearly how the final total will be calculated (Competition and Markets Authority, 2025). The CMA published final price transparency guidance on 18 November 2025 and, on the same day, opened its first investigations under the new powers into eight businesses, sending advisory letters to a hundred more. Those investigations focus on how mandatory fees are presented, alleged drip pricing, default opt-ins and pressure selling.
For a broadband order that means setup fees, activation fees and delivery charges belong in the price you first see, not on the final screen. It also means the regulator now has direct enforcement powers and can fine up to 10% of global turnover, which is a rather different incentive structure than existed two years ago.
What are the deadlines, and who sets them?
Direct answer: the promoter sets them, there is no statutory minimum window, and the advertising code requires the closing date and the claim instructions to be disclosed rather than buried.
This is where most of the money is quietly lost. Under the CAP Code, promoters must conduct promotions equitably, promptly and efficiently, must be seen to deal fairly with participants, and must avoid causing unnecessary disappointment (Committee of Advertising Practice, n.d.). Rule 8.17 sets out the terms that count as significant conditions, which have to appear in the advertising because leaving them out would be materially misleading. The list includes:
- the closing date;
- the nature and number of the prizes or gifts;
- any unusual entry requirements; and
- any particular instructions on claiming.
Where an ad is limited by time or space, it must carry as much of that as practicable and point you clearly to an accessible place where all the significant conditions are prominently stated. Crucially, you should be able to retain those conditions, or easily access them, throughout the promotion. That is your justification for taking a screenshot and for asking for the terms in writing. Prizes must also be awarded as described, or as a reasonable equivalent, normally within 30 days.
The structural trap
Many broadband claim windows do not open until several months into the contract, and then stay open only briefly. So there are two dates to miss, not one, and the first is the more dangerous because nothing prompts you. A reminder set for the day the window opens is worth more than one set for the day it closes.
What is the prepaid card problem?
Direct answer: a prepaid reward card is worth less than the same figure in cash, and the terms vary so much that you have to read them for the specific offer.
We are deliberately not going to state typical expiry periods or fees, because they differ by issuer and change. What we can give you is the three questions that determine the real value, and the reasoning behind each.
Cash does not expire. A card that does is a deadline you did not ask for, arriving after the one you already had to meet.
If it will not work for the things you actually buy, its value to you is lower than its balance, whatever the balance says.
Most cards cannot be withdrawn as cash and cannot be topped up, so the last few pounds usually strand. Assume you will not spend the final balance.
So how do I work out what it is worth?
Direct answer: calculate the whole-term cost twice, once with the reward and once without it, then compare both against the best plain deal at your address. If it only wins with the reward, the reward is not a bonus. It is the entire reason the deal looks good.
This needs no assumed redemption rate, which is exactly why we use it. Here is the method on two invented but realistic 24-month packages.
| Deal A: £28 a month, £100 cashback on claim | Deal B: £25 a month, no reward | |
|---|---|---|
| Monthly cost over 24 months | £672 | £600 |
| Setup fee | £0 | £15 |
| Worst case, no reward claimed | £672 | £615 |
| Best case, reward received in full | £572 | £615 |
The same deal, two outcomes
Whole-term cost over 24 months. Illustrative figures. Lower is better.
Deal A is £43 better if you claim and £57 worse if you do not. The whole decision turns on one form, submitted in a window that has not opened yet. Deal B needs nothing from you at all.
Run the same sum on real prices at your address before you decide. Our guides hub has the working for the other cost elements, and it is worth reading our exit fees material too, because a reward that locks you into a longer term has a cost you have not counted yet.
Free and independent. Takes about thirty seconds.
What should I do the day I order?
Direct answer: six things, all of them before you close the tab. This is the part that converts a promise into money.
Not the summary. The page with the closing date and the claim instructions on it. The code says you should be able to retain those conditions, so take them at their word.
The date the claim window opens and the date it closes. Diarise the opening date, with a second reminder a week before it shuts.
Account number, order reference, a bill from a specific month, a photo of something. Whatever it is, save it now rather than hunting for it later.
If a separate company administers it, that is another account to create and another set of terms. Find out before you need to know.
There is no advantage in waiting and every risk in it. If the claim is rejected, an early submission leaves you time to fix it inside the window.
Prizes and gifts should normally be awarded within 30 days. If nothing has arrived, that is the point to ask, in writing.
What if the claim is refused, or I miss the window?
Direct answer: complain to the provider first, then use the free ombudsman. Report misleading advertising to the ASA as well, but do not expect the ASA to get your money back.
The order matters, and so does knowing what each body can actually do for you.
| Route | What it can do | What it cannot do |
|---|---|---|
| The provider's complaints process | Pay you. Most claims that go wrong are fixed here, especially with the terms screenshotted. | Be impartial. |
| The ombudsman, after 8 weeks or a deadlock letter | Make a binding decision, free of charge. Your bill names which scheme your provider belongs to. | Look at it before you have complained to the provider. |
| The ASA | Rule on whether the advertising was misleading, and make the advertiser change or withdraw it. | Award you compensation. |
| The CMA | Investigate and fine, using its powers since 6 April 2025. | Act as a complaints service for one household. |
One more right that people forget in this situation. If you signed up online, over the phone or at your door, the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 give you 14 days to cancel without giving a reason. If the reward turns out to be materially different from what was advertised and you are still inside that window, cancelling is often faster than arguing. Do it in writing and keep a copy, because if it is disputed the burden of showing you cancelled in time falls on you.
Adrian's take
I have come round on these offers, though not in the direction you might expect. I used to think the problem was forgetfulness, and that the fix was a better reminder. The research says otherwise, and it is the more uncomfortable finding: we are actually rather good at knowing we might forget. What we are hopeless at is imagining how much we will resent the claim when it finally comes round. That is a harder bias to design around, because a reminder does not fix it. So I would put it this way. If a deal only wins once you assume the money arrives, you are not comparing prices any more, you are betting on your own future patience. Some people should take that bet. Anyone who has ever let a rail delay refund slide, or left a gift card in a drawer, probably should not.
The five questions to ask before you sign
- Is the reward automatic, or do I have to claim it? If nobody can answer this plainly, treat it as a claim.
- When does the claim window open and close? Two dates, both in writing.
- Is the same package available cheaper without the gift? If yes, the gift is not free, and the ASA has upheld complaints on exactly that point.
- What form does the money take? Bill credit, bank transfer, cheque or prepaid card, in descending order of usefulness to you.
- Does the deal still win if the reward never arrives? This is the only question that really matters.
Adrian's closing thought
There is a reasonable version of all this. A provider that wants your custom and hands you a credit on your first bill, with nothing to claim, is simply competing on price in a slightly showier way. Nothing wrong with it. The version worth being alert to is the one where the size of the number is inversely proportional to the ease of getting it, because that relationship is not a coincidence. If the reward is unusually generous and the claim is unusually fiddly, those two facts are the same fact.
Frequently asked questions
Is broadband cashback worth it?
It depends entirely on whether the claim is automatic. A bill credit applied without you doing anything is worth its face value. A reward you must claim through a portal within a fixed window is worth less, because a share of people never complete it. Price the deal twice, once assuming the money arrives and once assuming it does not, and only choose it if it still beats a plain rival in the second case.
Why do broadband companies offer cashback instead of a lower price?
Because a promise you have to act on costs less than a discount you do not. A field experiment published in the American Economic Journal: Economic Policy in 2025 found that consumers do not reduce demand when a rebate is made harder to claim, and underestimate the hassle of claiming by around €20 per person. Exploiting that misperception more than doubled the profitability of the rebate compared with an equivalent automatic discount.
When can a broadband gift legally be called free?
Only when it is genuinely separate from and additional to what you pay for. Under the DMCC Act 2024 it is a banned practice to describe something as free if the consumer has to pay anything beyond the unavoidable cost of responding and delivery. The CAP Code also bars calling an element of a package free if its cost is already in the package price. In 2024 the ASA upheld a complaint against a company advertising free superfast wifi where the cost was included in the package.
How long do I have to claim broadband cashback?
It varies by offer and there is no legal minimum, so you have to read the terms. The CAP Code treats a closing date and any particular instructions for claiming as significant conditions that must appear in the advertising, or be one click away in a place you can keep or access throughout the promotion. Many windows do not open until several months into the contract, which is exactly why people miss them.
What is drip pricing and does it apply to broadband?
Drip pricing is showing a headline price and then revealing additional mandatory charges as you move through the purchase. It became a banned practice under the DMCC Act 2024 on 6 April 2025. Traders must give the total price up front in any invitation to purchase, including all mandatory fees. For broadband that means setup and activation fees should not appear only at checkout.
Is a prepaid reward card as good as cash?
No. A prepaid card is usually worth less than the same amount in cash because it can expire, may not be usable everywhere, often cannot be withdrawn as cash, and tends to leave a small unusable balance. Ask three questions before you value it: when does it expire, where can it be spent, and can the balance be transferred or withdrawn.
What should I do if my cashback claim is refused or the deadline passed?
Complain to the provider in writing first, quoting the promotion terms and the evidence you submitted. If it is not resolved within eight weeks, or you get a deadlock letter, take it to the provider's alternative dispute resolution scheme, which is free and named on your bill. You can also report misleading advertising to the ASA, but the ASA cannot award you money.
Can I cancel if the cashback turns out to be different from what was advertised?
You have 14 days to cancel a broadband contract agreed online, over the phone or at your door, under the Consumer Contracts Regulations 2013, and you do not need a reason. If the advertising was materially misleading you may have wider rights under the DMCC Act 2024. Cancel in writing and keep a copy, because the burden of showing you cancelled in time sits with you.
How often do people forget to claim broadband cashback?
There is no reliable public UK figure, and widely circulated claims of 40 to 60 percent are not traceable to a primary source. The peer-reviewed evidence points somewhere more useful: consumers are good at predicting that they might forget, but bad at predicting how much effort claiming will take. The practical implication is to distrust your estimate of the hassle rather than your memory.
Does a free gift make a broadband deal cheaper?
Not if the package price went up to pay for it. The CAP Code bars describing something as free where the cost of the thing you must buy has been increased. The ASA has upheld complaints on exactly that basis, including a camera sold with a free memory card at a higher price than the camera alone. Always check whether the same package is available cheaper without the gift.
References
- Advertising Standards Authority. (2018, April 25). ASA ruling on Argos Ltd. https://www.asa.org.uk/rulings/argos-ltd-a18-409893.html
- Advertising Standards Authority. (2023, December 20). ASA ruling on Kellogg Europe Trading Ltd. https://www.asa.org.uk/rulings/kellogg-europe-trading-ltd-a23-1206282-kellogg-europe-trading-ltd.html
- Advertising Standards Authority. (2024a, August 14). ASA ruling on Quintain Living Ltd. https://www.asa.org.uk/rulings/quintain-living-ltd-a24-1244037-quintain-living-ltd.html
- Advertising Standards Authority. (2024b, October 23). ASA ruling on Webloyalty International Ltd. https://www.asa.org.uk/rulings/webloyalty-international-ltd-a24-1248087-webloyalty-international-sarl-ltd.html
- Advertising Standards Authority. (2025, December 11). Use of "free". Retrieved 25 July 2026, from https://www.asa.org.uk/advice-online/use-of-free.html
- Committee of Advertising Practice. (n.d.). 08 Promotional marketing. UK Code of Non-broadcast Advertising and Direct & Promotional Marketing. Retrieved 25 July 2026, from https://www.asa.org.uk/type/non_broadcast/code_section/08.html
- Competition and Markets Authority. (2025, April 4). Unfair commercial practices (CMA207). GOV.UK. https://www.gov.uk/government/publications/unfair-commercial-practices-cma207/unfair-commercial-practices
- The Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013, SI 2013/3134. https://www.legislation.gov.uk/uksi/2013/3134
- Digital Markets, Competition and Consumers Act 2024, c. 13, Schedule 20. https://www.legislation.gov.uk/ukpga/2024/13/schedule/20
- Rodemeier, M. (2025). Buy baits and consumer sophistication: Field evidence from instant rebates. American Economic Journal: Economic Policy, 17(2), 30-59. https://doi.org/10.1257/pol.20230358
Written by Adrian James, Broadband Editor at BroadbandSwitch.uk (LinkedIn). Reviewed by Dr Alex J. Martin-Smith (LinkedIn). Published 26 July 2026, sources last verified 25 July 2026. Worked example figures are illustrative and are not live prices. This guide is information about UK consumer and advertising rules, not legal advice. Promotion terms change; always read the terms of the specific offer.