Traps & Dark Patterns
The Extra That Appears On The Last Screen
Add-ons offered at the final checkout step are placed there because a buyer who has already decided evaluates a small additional cost very differently.

Protection plans, priority handling, insurance and small upgrades appear at the last step of a purchase rather than alongside the product. The placement is the most important thing about them.
The decision has already been made by then
By the final screen, a buyer has chosen the product, entered details and committed mentally to the purchase. The remaining question is only how to finish.
An additional item introduced at that moment is not compared against alternatives, because comparison has stopped. It is compared against the inconvenience of stopping.
The same item offered next to the product would be evaluated properly, which is precisely why it is not offered there.
Relative size does the rest
A small charge presented beside a much larger total reads as negligible, even though its absolute value would be scrutinised on its own.
This is why add-ons cluster at a low fraction of the purchase price rather than at a fixed amount. The proportion is what makes them feel trivial.
Across many purchases those amounts accumulate into a real figure, which no single checkout ever displays.
The wording asks a different question
Options are frequently phrased as a choice between protecting the purchase and declining protection, rather than between two prices.
Framed that way, declining feels like accepting a risk rather than saving an amount, which is a much harder thing to do quickly.
Reading the option as a price for a defined benefit, and asking what it actually covers, restores the original comparison.
Overlapping cover is common
Protection offered at checkout frequently duplicates something already held: an existing policy, a payment method's own protection, or rights that apply to the sale regardless.
Duplicate cover rarely pays twice, so the second policy can add cost without adding capability.
The relevant question is what this adds beyond what already applies, and it is answerable only by knowing what already applies.
Defaults and pre-selection
Where an add-on is pre-selected, the design has converted a decision into an opt-out, and opt-outs are taken far less often than options are chosen.
Rules in several jurisdictions restrict pre-ticked charges, though the scope varies and changes, and enforcement lags the practice.
Reading the final total against the product price before confirming catches almost all of this, and takes about as long as the screen was designed to prevent.
Where the two numbers differ by more than delivery and tax, something has been added, and finding it is easier before the payment than afterwards.
None of this makes every checkout add-on poor value. It makes the last screen the worst place to evaluate one.
Questions readers ask
How do I value a bundle properly?
Price only the components you actually wanted, at the best price you could get them separately, and compare that total with the bundle price.
Why are bundle savings often so large?
Because every component is counted at its full list price, including the ones with the widest margins and the ones you would never have bought.
Also by Bhavesh Ranka
- Cost-plus and value pricing put two different tags on one objectHow Pricing Works
- Prices ending in nine outlived the reason they were inventedHow Pricing Works
- Good, better, best: what the middle option is forHow Pricing Works
- The successor announcement is the event that moves the old priceWhen to Buy





