A sales promotion is a short-term incentive designed to drive a specific response - a purchase, a trial, a sign-up, a referral - within a defined window. Done well, it moves a real business metric. Done as a generic discount with no mechanic behind it, it just erodes margin.
The 15 examples below are grouped by what they're actually built to achieve, not just what they look like. Each one is a real, sourced campaign, so you can see the mechanic, the result, and decide whether it fits your goal before you build anything. If you're planning to run one of these rather than just read about it, that end-to-end delivery - strategy, creative, legal, and the platform to run it on - is exactly what our sales promotions team handles.
A sales promotion is a time-bound initiative that motivates a customer to buy, try, or engage with a product or service - as distinct from advertising, which builds awareness over the long term. Promotions run through free channels (social, email, on-pack) or as the centrepiece of a paid campaign, and they're measured against a specific KPI: trial rate, basket size, repeat purchase, referral volume, or churn.
Before you brief a creative agency or a promotions platform, define the behaviour you actually want to change. Not every mechanic moves the same metric.
| Objective | Recommended mechanic |
|---|---|
| Trial a new product | Free samples, on-pack promotion |
| Create urgency and clear stock | Flash sales, BOGO |
| Increase basket size | Cashback, lifestyle discounts, branded bundles |
| Build repeat-purchase habits | Loyalty program promotions, collect-and-redeem vouchers |
| Reduce cart abandonment | Free shipping and returns |
| Reach a new audience at low cost | Joint promotions, referral discounts |
| Build brand equity and earn media | Charitable cause promotions, social-led engagement campaigns |
| Generate leads and first-party data | Vouchers and coupons, prize-based contests |
A unique code, QR link, or entry mechanic printed on the pack turns every unit sold into a piece of media - no retailer sign-off needed for the digital layer, because the packaging itself does the distribution.
Walkers' "Do Us a Flavour" is the reference case: consumers submitted flavour ideas via an on-pack code, the public voted, and the winning flavour went to shelf. The IPA case study records £34.5m in incremental sales revenue, a sales contribution of 292 million packs, and a TV profit ROI of £5.32 per £1 spent. We've run the same mechanic for Glenisk's Disney Pixar movie tie-in, pairing on-pack codes with in-store display and an experiential screening event.
Sampling puts the product in someone's hands before they've committed to buying it - still the most direct way to convert scepticism into trial, especially for food and drink.
Cadbury distributed 1,859,000 Darkmilk samples to NHS and essential Key Workers during the pandemic. Per the campaign case study, 63% of respondents hadn't tried Darkmilk before, and 91% of that group said the sample encouraged them to buy it in future. That's the sampling mechanic doing its job: converting non-buyers, not rewarding existing ones.
Contests, giveaways, and character-driven storytelling extend reach because people share them without being asked to. The mechanic works when the content is genuinely shareable, not just "tag three friends to win."
Aldi UK's Kevin the Carrot started as a Christmas ad mascot. It grew into an annual social-first storyline - stag-do group chats, engagement announcements, a wedding - that consumers follow and share unprompted. Per System1's case study, the campaign has helped Aldi post stronger year-on-year sales growth than its grocery rivals. Individual ads have scored the maximum 5.9 stars on System1's ad-testing platform. It's not a "win a prize" contest, but it proves the same principle: engagement-first content earns reach that paid media can't buy.
Buy-one-get-one-free deals create urgency and a clear, easy-to-understand value exchange. They work on products, meals, or services, and they're simple enough that conversion doesn't depend on explaining the mechanic.
Domino's UK runs "Two for Tuesday" as a standing, app-exclusive BOGOF offer on medium and large pizzas. It's a permanent weekly mechanic, not a one-off campaign - proof that BOGO can anchor a recurring low-traffic day, not just clear excess stock.
Cashback gives a tangible, delayed reward: the customer pays full price but gets money back after registering the purchase. It's commonly layered onto big-ticket electronics and appliances, where a one-off cash incentive can tip a comparison-shopping decision.
Samsung UK runs recurring cashback promotions through retailers including Currys - claimed via a Samsung Account within a fixed claim window, per the official promotion terms. The mechanic suits categories where the purchase decision is considered and price-comparison is high, because the cashback removes a chunk of the price gap without discounting the shelf price itself.
Discounts targeted at a specific group - students, over-60s, key workers - create relevant engagement instead of a blanket price cut, and they're often the entry point for a longer brand relationship.
UNiDAYS connects student-verified discounts to over 800 brand partners. Its student-focused campaign for LOOKFANTASTIC won Best Fashion, Health and Beauty Campaign at the 2021 Performance Marketing Awards. The mechanic: product ranges chosen through student polling, not a blanket discount. Lifestyle discounts perform better when the audience shapes the offer, not just receives it.
Time-limited, storewide or category-wide discounts compress the decision window. They can run once or twice a year around a calendar moment, or on a fixed monthly schedule, amplified through email and social.
ASOS's Black Friday and Cyber Monday event pairs a storewide, clearly time-boxed discount - up to 70% off - with early access for app users, turning the sale window into an app-download driver as well as a revenue spike. The lesson for smaller brands: pairing the discount with a channel-exclusive perk (app-only, email-only) gives you a second KPI beyond the discount itself.
Coupons remain one of the most measurable promotion types, because redemption is trackable down to the individual customer - which is exactly what makes them worth personalising rather than blanket-mailing.
Boots' personalised Advantage Card mailing used machine-learning propensity scores to pick the six best offers for each recipient. The Marketreach case study reports a 23.9% average redemption rate, a 3.2% uplift in customer spend against a control group, and 18,583 incremental app downloads - evidence that a well-targeted coupon outperforms a generic one on every metric that matters.
The highest-performing coupon and cashback campaigns share one trait: the offer is personalised to what the customer already buys, not broadcast at everyone on the list.
Removing shipping cost and return friction addresses one of the biggest reasons carts get abandoned. As a subscription (rather than a one-off threshold), it also gives customers a reason to keep buying from the same retailer to make the fee worthwhile.
ASOS Premier - unlimited next-day delivery for an annual fee - had grown to roughly 1.3 million subscribers with 53% year-on-year growth, per Marketing Week's reporting on ASOS's loyalty strategy. Premier subscription revenue had grown to £16.9m by FY2025, holding up even as the wider fashion market tightened. It's a useful counterpoint to points-based loyalty: ASOS's traditional A-List points scheme was discontinued and only replaced years later by the ASOS World programme, while the paid convenience subscription kept growing throughout.
Doubling points, running a time-limited multiplier, or offering bonus points for signing up drives both engagement from existing members and acquisition of new ones - and it's cheaper to run than a new discount because you're spending in points, not cash.
Tesco's January 2024 Clubcard double-points event - its first major points event in over a decade - reached more than 20 million members and was projected to move 10 billion Clubcard points, per reporting on the event. We built a comparable mechanic for Instantor Rewards, a tiered trade loyalty programme that rewards plumbers via receipt upload even though the brand doesn't sell to them directly. It's one of several loyalty programme builds where the points event, not just the base programme, drives the engagement spike.
Bundling related products at a reduced combined price increases basket size while giving the customer a reason to try something adjacent to what they already buy. A branded gift with the bundle extends the brand's presence into the customer's home long after the transaction closes.
The mechanic is well established across FMCG and beauty - McDonald's Happy Meal toy tie-ins (see joint promotions, below) are the best-known version of "buy the product, keep the branded item." We couldn't find a standalone bundle case with a verifiable, sourced outcome at the time of writing. Treat this as a proven category, and validate the specific uplift with your own A/B test before committing budget.
Bundling a promotion across two brands - or a brand and a film, sports body, or cause - lets each partner reach the other's audience for the cost of the creative and media, not a full acquisition campaign.
McDonald's BTS Meal generated $98m (€90m) in incremental sales during its promotional window, driving a 250% jump in McNugget sales in South Korea and a 12% rise in US customer count, per Fast Company's coverage. Closer to home, our Glenisk x Disney Pixar partnership shows the same principle at FMCG scale: a licensed partner brings instant shelf appeal that a standalone on-pack promotion can't generate alone.
Enter-to-win mechanics offering a shopping spree or a large single prize tend to outperform many smaller prizes of equal total value. A single high-value prize is easier to talk about, and it generates stronger word of mouth. We couldn't verify a specific, sourced shopping-spree campaign with a published outcome at the time of writing. If you're considering this mechanic, pair it with a proven prize-draw structure instead of running it as an untested one-off - see mechanic 10's Clubcard note on scale, or our Texaco Support for Sport case study for how a single high-value grant structure builds goodwill.
Donating a fixed amount per unit sold to a cause during a set period builds a halo effect that outlasts the campaign window, and it works particularly well when the cause is tightly linked to the product itself.
Innocent Drinks' Big Knit, running since 2003 with Age UK, donates 30p to Age UK for every hatted smoothie bottle sold and has raised £3.6m for the charity to date. The mechanic works because the "hat" is a visible, differentiated shelf cue as well as the charitable trigger - the cause and the product experience are the same thing, not two separate messages competing for attention.
Rewarding existing customers for bringing in new ones turns your most engaged audience into an acquisition channel, usually at a lower cost per acquisition than paid media.
Monzo's pre-launch "golden ticket" referral mechanic let existing beta users hand out access codes that let a friend skip the waiting list. Per Extole's case study, the waitlist passed 200,000 signups before public launch, built almost entirely through word of mouth and referral. It's a reminder that a referral mechanic doesn't need a cash incentive - the reward just needs to be something people actually want, and early access qualified.
A few practical checks before any of the above goes live:
Whichever mechanic you choose, define the KPI first, pick the mechanic that moves it, and get the legal review done before the creative goes to print.
What is the most effective type of sales promotion?
There is no single "most effective" mechanic - it depends on the objective. Free samples and on-pack codes drive trial; BOGO and flash sales drive immediate volume; loyalty points and subscriptions drive repeat purchase; referrals drive low-cost acquisition. Match the mechanic to the metric you are trying to move, not the other way round.
What are the main types of sales promotion?
The core types are price-based (discounts, coupons, cashback, flash sales), value-added (BOGO, free samples, free shipping, bundles), and loyalty-based (points programmes, subscriptions, referral rewards). Cause-led and social-engagement promotions sit alongside these as reach-and-reputation plays rather than pure conversion tools.
How do you choose the right sales promotion for your goal?
Start with the KPI you need to move - trial, basket size, repeat purchase, referral volume, or churn - then pick the mechanic built for that KPI. A promotion aimed at clearing stock (flash sale) looks nothing like one aimed at reducing churn (a renewal loyalty reward), so define the objective before you brief the creative.
Do sales promotions need legal sign-off?
Yes. Every promotion needs clear terms and conditions, a named promoter, eligibility rules and a closing date. In Ireland, prize draws and competitions should be checked against the Gaming and Lotteries Act 2019, and a free alternative route to entry is generally required if a purchase is involved. Get legal sign-off before the creative goes to print, not after.
How much does a sales promotion cost to run?
Cost depends heavily on the mechanic. A simple voucher or coupon campaign can run from a few thousand euros or pounds; a receipt-validated, multi-retailer promotion with fraud checks and prize fulfilment typically starts higher. Fixed-fee promotion models exist specifically to protect budget from the volume spikes a successful campaign can trigger.
We'll help you pick the right mechanic, sort the legal and technical build, and deliver a campaign tailored to your goal and budget.
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