There are two ways to save at Korzinka and they work on different principles. A promocode lowers the basket at the till, immediately. Cashback returns part of the money after payment. The question is not which is better in general — it is which gives more on the basket you are actually buying.
There are currently 2 active offers on the Korzinka page.
How they differ
- When it applies. A promocode at the till, so the amount you hand over drops there and then. Cashback arrives later — usually the next day or at the end of the month — which means you cannot count on it while paying.
- How it is calculated. A promocode is most often a fixed amount. Cashback is a percentage, so it grows with the basket.
- Who provides it. The promocode is the shop's offer. Cashback is the bank's or payment app's. So look for cashback terms on the bank's page and promocode terms on the shop's.
- What limits it. A promocode has a minimum spend and an expiry date. Cashback has a category and a monthly cap.
Which wins on which basket
The whole thing reduces to one rule: a fixed-amount promocode wins on a small basket and percentage cashback wins on a large one. The reason is simple — a fixed amount does not change, while a percentage grows with the total.
Finding the break-even point is easy: divide the promocode amount by the cashback rate. Below that basket size the promocode is worth more; above it, cashback is. Work this out before you reach the till, because rearranging a basket afterwards is awkward.
Two corrections apply. If the promocode carries a minimum spend, then below that threshold it is not an option at all and there is nothing to calculate. And if the monthly cashback cap is already used up, its real rate is zero.
Can you use both
Usually yes, because they come from different sides: the promocode from the shop, cashback from the payment method. They do not block each other.
There is one subtlety. Cashback is calculated on what you actually paid, which is the amount after the promocode. The larger the code's discount, the smaller the cashback. That is the order of calculation rather than a fault — which is why the combined saving comes out smaller than the two added together.
One more limit: an item already carrying a shop promotion usually will not take a promocode, because one item gets one discount.
Running the calculation
The division rule is easier to see in practice. Say the shop has a fixed-amount promocode and your card pays cashback at some rate. Dividing the promocode amount by the cashback rate gives you the basket size at which the two are equal.
An ordinary weekly shop almost always lands below that threshold, so the promocode wins there. A large monthly shop lands above it, and cashback gives more. That is why there is no universal answer — the answer moves with the size of the basket.
One detail matters: use the amount that will actually apply to you, not the advertised one. An offer phrased as "up to X" will not deliver X on a small basket.
What to check first
- Minimum spend. Measured on the goods; delivery does not count towards it.
- Payment method. Some offers work only with a particular payment method or card.
- Shop or app. An offer may run in the shop, in the app, or both — it is not always the same.
- Cashback cap. Early in the month the full rate applies; by the end the cap may be used up.
The practical order is simple: build the basket, look at the total, then do the division above. On a large monthly shop cashback almost always wins; on one small purchase the promocode does. On PromoBozor both pages show every offer with its conditions and the date it was last checked, so you can run the calculation on real numbers.
