The Broker's Cut
A connection through “Follow the incentives”: Look at how the way people are paid changes the decisions they make.
Undercurrent · Research Report · Consumer Behaviour
The Loyalty
Illusion
You think you're earning rewards. The scheme is earning data, behavioural lock-in, and a regressive transfer from the poor to the frequent flyer. None of them are designed to make you richer.
Consumer BehaviourPsychologyRetailAviation
£9.02bn
UK loyalty market
annual value
20–30%
Points unredeemed
annually
75M+
Combined loyalty members
major schemes
−£1,100
Net annual loss
typical household
The UK loyalty market generates £9.02 billion annually. Tesco has 21 million Clubcard members. Sainsbury's has 27 million Nectar members. Costa Club has 34 million members globally. BA's Executive Club has tens of millions of Avios collectors.
The question this report asks is a simple one: successful for whom? The points economy is built on three interlocking mechanisms that work invisibly to extract value from consumers.
01
The Breakage Business Model
The scheme profits most from customers who engage least
The foundational economics of any loyalty programme rest on a concept called breakage: the proportion of issued points that are never redeemed. Under IFRS 15 accounting standards, unredeemed points are recognised as revenue when the company estimates they will not be claimed. This is not a minor rounding error — it is a structural profit centre.
Bond Brand Loyalty's 2024 industry report estimates that approximately 20–30% of all loyalty points go unredeemed annually. For infrequent customers — those who collect points sporadically across multiple schemes — breakage rates can reach 93%.
The business model is partially inverted from its stated purpose: the scheme profits most from the customers who engage least.
The Breakage Funnel: What Happens to Every 100 Points Earned
100
Points earned
−20
Never engaged−15
Expired65
Available for redemption
−8
Sitting dormant57
Actually redeemed
Source: Bond Brand Loyalty Report (2024). The most profitable loyalty customer is not the one who redeems everything, but the one who earns enthusiastically and redeems rarely.
02
The Data Play
What your card really buys
On 13 February 1995, Tesco launched Clubcard nationally with 16 million cards and closed every store the weekend before to dress it with promotional materials. Within one year, Tesco had overtaken Sainsbury's as the UK's largest supermarket. Within three years, it had doubled its grocery market share.
The architect of this transformation was not a retailer but a data company: dunnhumby. When dunnhumby presented their findings to the Tesco board after analysing three months of Clubcard data, then-chairman Lord MacLaurin delivered what became the most quoted line in retail analytics history:
"What scares me is that you know more about my customers after three months than I know after 30 years."
— Lord MacLaurin, Chairman, Tesco PLC, 1994
What dunnhumby had discovered was not merely purchase history. It had discovered a complete behavioural profile of every cardholder: what they bought, when they bought it, how price-sensitive they were, which promotions they responded to, and — by inference — their age, income band, household composition, and life events.
By 2014, dunnhumby was generating $151 million in annual profits for Tesco, selling customer intelligence to approximately 50 FMCG manufacturers globally. Over the ten years following Clubcard's launch, it generated an estimated additional £60 billion in sales for Tesco.
| Data Layer | What It Captures | Commercial Use |
|---|---|---|
| Direct data | Every item, price, store, time, payment method | Transaction intelligence |
| Inferred data | Age band, income, household size, life events | Targeted marketing |
| Behavioural data | Price sensitivity, brand loyalty, switching likelihood | Competitor analysis, shelf placement |
The Clubcard is not primarily a reward mechanism. It is a data collection instrument that pays for itself by selling what it collects.
Beyond Google
Sainsbury's Nectar360 delivers weekly personalised bonus points to each customer on products they already purchase regularly. The mechanism is precisely calibrated: you are being rewarded for doing what you were already going to do. The "offer" costs Sainsbury's almost nothing in incremental revenue while generating the impression of active benefit — and collecting another week of behavioural data to sell.
03
The Stamp Card Psychology
A masterclass in behavioural engineering
The humble coffee stamp card appears to be the simplest loyalty instrument in existence: buy nine coffees, get one free. It is, in fact, a precisely engineered behavioural trap that exploits two of the most robust findings in consumer psychology.
The Endowed Progress Effect
In a field experiment at a car wash, researchers issued customers one of two loyalty cards. Card A had 10 stamp slots with 2 already filled in — requiring 8 more stamps. Card B had 8 stamp slots with none filled — also requiring 8 stamps. Both required exactly the same effort.
34%
Card A completion
(2 pre-filled)
19%
Card B completion
(0 pre-filled)
Pre-framed as "incomplete" vs. "not yet begun" nearly doubled completion despite identical effort required.
The Goal-Gradient Effect
Customers purchase coffee more frequently the closer they are to earning a free cup. A customer with one stamp remaining buys at nearly three times their baseline frequency.
If the goal-gradient effect causes a customer to make just two additional coffee purchases per cycle that they wouldn't otherwise make, the economics invert entirely.
Cost basis
9 × £3.50 = £31.50
earn £3.50 reward
+10% return ✓
With goal-gradient
+2 extra = £7.00
exceeds £3.50 reward
−£3.50 loss ✗
The Sunk Cost Lock-In
Once a customer has accumulated four stamps, switching to a cheaper independent café triggers a powerful sunk cost response. The four stamps represent "progress" that feels psychologically costly to abandon — even though the rational calculation clearly favours switching. The stamp card creates switching costs from nothing but perceived progress.
04
The Supermarket Loyalty Trap
The true cost of Clubcard loyalty
Tesco Clubcard is the most studied loyalty programme in the world. Its earn rate is straightforward: 1 point per £1 spent, with each point worth 1p — a 1% cashback equivalent. On a household grocery spend of £5,000 per year at Tesco, this generates £50 in vouchers.
The problem with this calculation is that it measures the reward against the counterfactual of shopping at Tesco without a Clubcard. The correct counterfactual is shopping at the cheapest available alternative.
Academic and consumer research consistently finds that Aldi and Lidl baskets are 15–20% cheaper than equivalent Tesco baskets. On a £5,000 annual grocery spend, this represents a potential saving of £750–£1,000 per year. The Clubcard generates £50–170 in rewards.
The net cost of Clubcard loyalty is approximately £580–950 per year.
| Element | Annual Amount | Notes |
|---|---|---|
| Baseline Tesco spend | £5,000 | Typical household |
| Clubcard rewards (1%) | £50–£170 | 1% on spend + Clubcard Prices |
| Aldi/Lidl saving potential | −£750–£1,000 | 15–20% discount vs. Tesco |
| Net loyalty premium | £580–950 | Cost of lock-in vs. discounters |
| Psychological lock-in | Significant | App, routine, identity integration |
CMA 2024: Loyalty prices do represent genuine savings within Tesco, but should not deter shopping around. Loyalty programmes are designed to prevent exactly this calculation.
The shift from "earn points" to "Clubcard Prices" is a masterclass in reframing. A discount is something the retailer gives you. A loyalty price is something you unlock through your membership. The psychological difference is significant: the discount model makes you feel generous; the loyalty price model makes you feel the non-member is penalised for disloyalty. The emotional valence shifts from gratitude to loss aversion.
05
Airline Miles: The Aspiration Trap
Engineered aspiration and systematic devaluation
Airline loyalty programmes represent the apex of the loyalty scheme architecture. They combine all six psychological mechanisms with an additional feature unique to the travel sector: aspirational anchoring. The promise of a business class flight to New York — a product that retails for £3,000–£5,000 — creates a reward so desirable that it overrides almost all rational cost-benefit analysis.
This aspiration is systematically exploited through a mechanism called the devaluation ratchet: the periodic, unilateral reduction in the value of accumulated points. Unlike a savings account — where the bank cannot arbitrarily reduce your balance — a loyalty programme can change the redemption rate at any time, with no compensation to existing holders.
BA Avios Devaluation Timeline: London–New York Economy Return (Off-Peak)
2010
20 Avios
2015
30 Avios
2019
40 Avios
Dec 2025
55 Avios
Avios cost increased 175% in 15 years. Cash surcharge quadrupled (£30 → £120). December 2025 devaluation added a further 10% across all routes.
| Year | Economy Avios | Cash Surcharge | Status |
|---|---|---|---|
| 2010 | ~20,000 | £30 | Pre-devaluation baseline |
| 2015 | ~30,000 | £60 | First major devaluation |
| 2019 | ~40,000 | £90 | Second major devaluation |
| Dec 2025 | 55,000 | £120 | Third major devaluation |
| % Change | +175% | +300% | Controlled default on promise |
Source: BA Executive Club award chart history, AwardWallet, One Mile at a Time. The devaluation ratchet has structural logic: reduces balance sheet liability while requiring members to spend more to reach the same reward threshold.
Beyond Google
The primary mechanism for Avios accumulation is not flying — it is the co-branded credit card. The American Express British Airways Premium Plus card charges a £300 annual fee and offers a sign-up bonus of approximately 25,000 Avios. To earn enough Avios for a return economy flight to New York (55,000) after the sign-up bonus, a cardholder must spend an additional £30,000 on the card — generating approximately £300 in annual fees in the process. Dynamic pricing compounds this: the same route can cost materially different amounts depending on demand, making the "value" of a point impossible to calculate in advance.
06
The Behavioural Architecture
Six psychological mechanisms operating simultaneously
Every loyalty programme — from the Costa stamp card to the BA Executive Club — is built on the same six psychological mechanisms. These are not incidental features of programme design; they are the core engineering. Understanding them is the difference between being a loyalty programme participant and being a loyalty programme product.
1. Loss Aversion
The threat of losing accumulated points or tier status is felt twice as acutely as the pleasure of gaining them. Annual tier resets and point expiry are powerful behavioural drivers.
2. Endowed Progress
Artificially framing a task as already begun dramatically increases completion probability. A 10-slot card with 2 pre-filled converts at nearly double the rate of an 8-slot empty card.
3. Goal-Gradient Effect
Customers purchase more frequently the closer they are to rewards. The effect is exponential near the goal — a customer with one stamp remaining buys at 3× baseline frequency.
4. Variable Ratio Reinforcement
Surprise bonus points and personalised offers arriving unpredictably. The same reward schedule that makes slot machines addictive is deployed through loyalty programmes.
5. The IKEA Effect
You overvalue points you have "earned" through your own spending relative to their objective cash equivalent. 10,000 Avios feel worth more than their objective £50–100 cash value.
6. Identity Integration
"I'm a Tesco shopper" or "I'm a BA Gold member" becomes part of self-concept. Switching feels like a betrayal of identity rather than a rational economic decision.
The combined effect of these six mechanisms is well-documented: loyalty programme members spend 5–20% more than non-members and are significantly less likely to switch to a competitor, even when the competitor offers materially better prices.
07
The Poverty Premium
A regressive transfer built into the system
The most underreported dimension of loyalty scheme economics is their regressive distributional effect. Loyalty programmes systematically transfer value from lower-income consumers to higher-income consumers — not through malice, but through the structural requirements of participation.
Effective loyalty scheme participation requires: a smartphone (for app-based offers), a credit card (for co-branded earn rates), sufficient financial buffer to concentrate spending at a single retailer, and the cognitive bandwidth to track and optimise across multiple schemes. These requirements correlate strongly with income.
Loyalty Member (Higher Income)
- ✓Accesses Clubcard Prices
- ✓Receives personalised offers
- ✓Redeems Avios for aspirational travel
6–8%
effective grocery discount
Non-Member (Lower Income)
- ✗Pays full shelf price on loyalty products
- ✗Receives no personalised offers
- ✗No access to app-only deals
2–4%
effective premium vs. members
The CMA's 2024 investigation confirmed that loyalty prices represent genuine savings for members — which necessarily means that non-members pay more than members for the same products. Those who can least afford to pay more are systematically charged more.
08
Net Annual Position
The actual financial bottom line
The chart below models the net annual position of a typical UK household participating in four major loyalty schemes: Tesco Clubcard, Sainsbury's Nectar, Costa Club, and the BA Avios credit card. It separates rewards earned from the behavioural costs incurred.
| Scheme | Rewards Earned | Behavioural Costs | Net Position |
|---|---|---|---|
| Tesco Clubcard | £120–170 | −£650–850 (vs. Aldi/Lidl) | −£500–800 |
| Sainsbury's Nectar | £80–120 | −£100–150 (lock-in) | −£40–70 |
| Costa Club | £20–30 | −£25–40 (goal-gradient) | −£10–15 |
| BA Avios card | £90–100 | −£300–500 (annual fee, spending) | −£250–400 |
| TOTALS | £410 | −£1,510 | −£1,100 per year |
Behavioural costs include lock-in premium versus cheaper alternatives, goal-gradient extra purchases, annual fees, and estimated data value surrendered. This figure does not include the commercial value of data, estimated at £100–200/household/year to retailers.
The Arithmetic of Participation
£410
Rewards earned
−
£1,510
Behavioural costs
= −£1,100
Net annual loss per household
Beyond Google
The loyalty scheme creates a structural disadvantage for independent businesses that cannot match the digital infrastructure of large chains. A customer with 8 Costa stamps will not switch to an independent coffee shop — not because Costa's coffee is better, but because switching means abandoning perceived progress. The stamp card is, among other things, a competitive moat built from psychology rather than product quality.
09
Synthesis
What you're actually buying when you collect points
The loyalty scheme industry has achieved something remarkable: it has persuaded tens of millions of consumers to voluntarily submit to a surveillance and behavioural modification programme in exchange for rewards that, in aggregate, cost them more than they return.
The mechanism is not fraud — the points are real, the discounts are genuine, and the flights can be booked. The mechanism is architecture: a carefully engineered environment in which the rational decision is made psychologically difficult, and the irrational decision is made to feel like winning.
The consumer sees the reward. They do not see the 20–30% breakage rate that funds the programme's profitability. They do not see their purchase history being sold to the brands whose products line the shelves. And they do not see the six psychological mechanisms that cause them to spend 5–20% more than they would if the programme did not exist.
The question is not whether you are earning points. The question is what the programme is earning from you.
One Takeaway
The £9.02 billion loyalty market is profitable because it extracts value from millions of consumers through three mechanisms: breakage (20–30% of points unredeemed), data monetisation (your purchase history sold to brands), and behavioural engineering (six psychological mechanisms that cause you to overspend). The average household loses £1,100 annually while feeling like they're winning. The scheme profits most from customers who engage least.
The Dinner Party Line
"Loyalty schemes profit from three things: the 20–30% of points you never redeem, the sale of your purchase history to FMCG brands, and six psychological mechanisms that make you spend 5–20% more than you would without the scheme. The average household participating in four major schemes loses £1,100 annually. And one more thing: the scheme profits most from customers who engage the least. You're not earning rewards. You're the product."
You’ve looked beneath the surface.
Now follow the connection.
The Cashback Trap — How Earning Money Back Actually Costs You More
A connection through “Follow the incentives”: Look at how the way people are paid changes the decisions they make.
The Reserving Game
A connection through “Follow the incentives”: Look at how the way people are paid changes the decisions they make.
Follow the money →
The incentives inside everyday financial products.