Is a paid membership worth it? Do this sum first
Paid memberships are sold on the size of the discount. The discount is not the point. The only question that matters is whether the discount you will actually use exceeds the fee.
The sum
Take the thing you are about to buy.
- What does it cost as a member?
- What does it cost without the membership, at the cheapest shop you can find — not at the same shop's non-member price?
- Subtract. That is your real saving on this purchase.
- Subtract the annual fee.
If the result is negative, joining today loses you money on this purchase. That does not automatically mean don't join — but it does mean you are betting on future purchases, and you should say that out loud rather than let the discount say it for you.
The mistake nearly everyone makes
Comparing the member price against the same shop's non-member price. That is the shop's own framing, and it is the wrong comparison. The right one is the member price against the cheapest price anywhere. A membership that saves £32 at one shop is worth nothing if a different shop sells the same item for £280 with no membership at all.
Things worth counting that aren't the discount
- Free or faster delivery, if you order often. This is frequently worth more than the product discounts.
- Cashback or reward tiers — real, but usually paid a year later, so discount it in your head.
- Extended returns or warranty. Genuinely valuable on expensive items, worth nothing on a kettle.
- Fuel, food or services you would buy anyway.
Things worth counting against it
- Automatic renewal. Most memberships renew silently. A membership you forgot about is a subscription, not a saving.
- Buying more because you are a member. The commonest way a membership costs money.
- A single-shop habit. Membership makes you loyal, and loyalty is expensive in a market where the cheapest shop changes weekly.
Free trials, and the date you should write down
A free trial is a genuine saving and a genuine trap in the same offer. The trap is not the trial — it is the renewal, which is designed to be forgettable. If you take one, put the cancellation date in your calendar the same minute you sign up, one or two days before it ends. A membership you meant to cancel is the most expensive kind.
Sharing, and when it is allowed
Some warehouse memberships permit a second cardholder at the same address, and some permit a guest to shop with a member. Others explicitly do not. This is worth reading rather than assuming, because it changes the sum entirely: a fee split two ways halves the number you have to beat.
When the answer is clearly yes
Memberships tend to pay for themselves when three things are true at once: you shop there anyway, you shop there often, and the saving applies to things you would buy regardless. If any one of those is false, the maths usually does not work — and the discount on a single large purchase is rarely enough on its own.
What Arbi does about it
Where a shop shows both a member and a non-member price on its own page, Arbi reads both, works out the difference, and tells you in plain English whether joining pays for itself on that purchase — including saying when it does not. It is one of the few places where the honest answer is often “don't”.