If it feels like your weekly shop costs more but buys less, you’re not imagining it. Over the last few years, price rises have been the headline — but two quieter shifts have also changed what consumers actually pay: shrinkflation (getting less for the same price) and personalised pricing (different people seeing different prices for the same product).
Both can be hard to detect in the moment. Both can leave you feeling a bit cheated when you notice. And both can quietly reshape how much you spend on everyday life: groceries, toiletries, subscriptions, travel, even home and garden supplies.
This guide is practical rather than preachy. It’ll show you what to look for, how to protect yourself, and how to make smarter buying decisions without turning shopping into a full-time job.
What shrinkflation really looks like
Shrinkflation isn’t always dramatic. It often shows up as small reductions that are easy to miss:
a chocolate bar that is “new size” but feels lighter
a box of washing tablets that contains fewer tabs
a bag of crisps that looks the same but has a smaller weight
toilet rolls that are narrower or have fewer sheets
a “value pack” that quietly drops the number of items inside
It works because most of us buy by habit and by packaging. We recognise the brand, the shape, the colour, the price point — and we assume the contents are broadly the same.
Over time, those small changes can add up to a big difference in value. The price might not move, but your cost per unit does.
If you want a deeper dive into how consumers detect it (and how it changes brand loyalty), this article is a strong companion read: Shrinkflation and trust.
How personalised pricing works (and why it’s controversial)
Personalised pricing is where the price you see is influenced by data about you — or what a company believes about you. That might include:
your location
the device you’re using
your browsing or purchase history
whether you’re logged in
your loyalty status
the time of day
demand levels and stock
Sometimes this is framed as “offers” or “tailored discounts”. Sometimes it’s just invisible variation, where two people can see different prices for the same thing.
There are reasonable debates here. Businesses will argue it helps them compete, reward loyalty, or manage demand. Consumers often feel it crosses a line when it becomes opaque: if you can’t tell whether you’re getting a fair deal, trust erodes quickly.
A useful, ethics-focused read on this exact question is: Personalised prices
Why these practices hit households differently
Shrinkflation and personalised pricing don’t just change what you pay. They change who pays more.
Households with less time (busy parents, carers, multiple jobs) have fewer opportunities to compare unit prices or shop around.
People without easy transport may be tied to one local retailer, reducing choice.
Those on tight budgets feel the impact of “small” reductions in value more sharply.
Digital-only discounts can exclude people who don’t use apps or can’t access online offers easily.
In other words, the hidden-cost economy often rewards those with time, flexibility and confidence — and penalises those without.
The easiest way to beat shrinkflation: shop by unit price
If you do only one thing, do this: compare unit prices, not ticket prices.
In UK supermarkets, you’ll usually see unit prices like:
£/kg
£/100g
£/litre
£/each
That’s the truth of value. Brands and packaging are emotional cues; unit prices are the maths.
Quick wins:
Compare the unit price of “standard” vs “bigger pack”. Bigger isn’t always cheaper per unit.
Watch for “special offer” labels that don’t reduce unit price much (or at all).
Be cautious with “price locked” messaging if the quantity has changed.
For home and cleaning products, unit pricing is especially useful because brands often change bottle shapes or concentrate formulas. A smaller bottle can still be good value if it’s genuinely more concentrated — but you’ll only know by checking the real comparisons (and sometimes reviews).
Practical ways to reduce the impact of personalised pricing
You don’t need to be paranoid to shop smarter. A few habits can reduce the chance you’re quietly paying more.
1) Compare prices across devices and browsers
If you’re buying something bigger (flights, hotels, appliances, furniture), check prices:
logged in vs logged out
phone vs laptop
different browsers (or private/incognito mode)
You won’t always see differences, but it’s a useful sense-check for major purchases.
2) Don’t assume loyalty equals best price
Loyalty schemes can be worthwhile, but they can also nudge you into thinking you’re “saving” when you’re just being anchored to a higher base price.
If an item is only a good deal with a loyalty card, compare it with alternatives and own-brand.
3) Be careful with “personalised offers”
A tailored offer can still be worse than a simple multibuy or a competitor’s regular price. Check unit prices, not just the percentage off.
4) Track big-ticket items
If you’re buying a camera, a vacuum, or a new tool for the garden, use a simple note on your phone to track prices over a couple of weeks. Price volatility is common, and a “sale” price is sometimes just a return to normal.
The psychology behind “feeling ripped off”
One reason these tactics cause such strong reactions is that they’re not just financial — they’re emotional.
When you notice shrinkflation, you’re reacting to a mismatch between what you expected and what you got. It feels like a breach of the unwritten deal: “I’ve bought this for years; you changed it without telling me.”
When you suspect personalised pricing, it can feel like you’re being judged or profiled. Even if the difference is small, the idea that someone else might get a better price for no clear reason can trigger a fairness instinct.
That fairness instinct matters. It’s one reason brand loyalty can drop sharply once consumers believe a brand is playing games.
How to spot shrinkflation at home without overthinking it
You can’t monitor everything. But you can keep an eye on the products that genuinely matter to your household budget.
A quick routine that works:
Pick 10 staples you buy regularly (coffee, cereal, pet food, washing tablets, shampoo, nappies, etc).
When you restock, glance at the weight/volume/quantity.
If something looks different, check unit prices and consider switching.
It’s not about being suspicious; it’s about being intentional.
You can also watch for telltale language on packaging:
“new size”
“new look”
“now even better”
“improved formula”
These can be totally innocent, but they’re also common cover for changes that reduce cost for the producer.
Smart swapping: how to protect quality while saving money
People often avoid switching brands because they assume own-brand will be worse. Sometimes it is. Often it isn’t.
Try a “swap test” approach:
Switch one product category at a time
Keep the old favourite as a backup the first time
Decide based on performance, not branding
For cleaning products especially, you may find you’re paying mostly for scent and marketing. For food staples, you may find own-brand is nearly identical because of shared supply chains and manufacturing.
What to do when you feel a brand has crossed a line
If you notice a product has shrunk or changed and you want to act:
Contact the brand politely and ask for an explanation
Leave a factual review focusing on quantity and value
Switch to a competitor and vote with your wallet
If the labelling feels misleading, consider reporting to the retailer’s customer service team
The point isn’t outrage; it’s feedback and choice. Brands respond to patterns, and consumers are often more powerful than they think.
A final note on what’s “ethical”
There’s a difference between legal, commercial, and ethical.
Shrinkflation can be legal if weights/volumes are correctly displayed — but it can still feel deceptive if it’s not clearly communicated.
Personalised pricing can be framed as “tailoring”, but it becomes ethically uncomfortable when it’s opaque, hard to compare, or seems to penalise certain people.
If you care about shopping fairly and spending wisely, the best defence is transparency: compare unit prices, question “deal” labels, and treat your attention like a valuable resource.