How to Compare Two Offers: A Method That Takes Two Minutes

Two friends are planning the same purchase from the same type of retailer. One mentions a 15% card discount with no minimum spend. The other has a 20% discount but needs to spend at least LKR 8,000 and the saving is capped at LKR 1,200. Who does better? It depends entirely on what they spend. Knowing how to compare two offers properly takes the guesswork out of that question.

Why Two Offers That Look Similar Can Have Very Different Value

Promotional terms are designed to highlight what's attractive about each deal. A 20% headline is more compelling than 15%, so that's what the banner shows. But the headline rarely tells the whole story. The real comparison happens across five dimensions:

1. Percentage or flat saving: what fraction of your bill is taken off
2. Cap: the maximum saving, which limits the headline at higher spend levels
3. Minimum spend: the floor your bill must reach before anything applies
4. Card requirements: which card you need, and whether you have it
5. Valid dates and outlets: whether the offer applies on the day you're going, at the specific branch

Two offers that look identical on the first point can differ entirely on the remaining four.

A Step-by-Step Method for Comparing Two Offers

Work through both offers with the same inputs. This is how to do it in practice.

Step 1: Write down your expected spend. Before you open any terms, decide what you're actually likely to buy. Use a realistic figure, not a round number that happens to meet someone's minimum.

Step 2: Check card eligibility on both. If one offer requires a card you don't hold, the comparison ends there. Confirm the card type (credit or debit), the bank and the tier for each offer.

Step 3: Check whether your spend clears both minimums. Does your expected spend meet each offer's floor? If one requires LKR 5,000 and your likely bill is LKR 4,000, that offer is out unless you'd spend more.

Step 4: Calculate the gross saving on each. Multiply your expected bill by each percentage. Note if either exceeds a cap, in that case, use the cap figure, not the calculated percentage.

Step 5: Check the outlet and dates. Confirm that the offer applies at the branch you plan to visit, on the day you plan to go. A better-percentage offer that doesn't apply at your nearest outlet is worth nothing on this trip.

Step 6: Compare the net saving. The offer with the higher net saving (after applying the cap and confirming eligibility) is the better choice, all else equal.

A Hypothetical Worked Example

These are invented figures to show the method, not a real promotion.

Offer A: 15% off, no minimum spend, no cap, requires Credit Card X. Offer B: 20% off, minimum spend LKR 6,000, capped at LKR 1,000, requires Credit Card Y.

You hold both cards. Your expected spend is LKR 7,000.

• Offer A: 15% of LKR 7,000 = LKR 1,050 saving. No cap, so you keep all of it.
• Offer B: 20% of LKR 7,000 = LKR 1,400. Cap is LKR 1,000, so saving is LKR 1,000.

Offer A saves more on this spend, despite the lower percentage. Offer B would only pull ahead if the cap were higher, specifically, it would equal Offer A at a spend of LKR 6,667, and exceed it at higher amounts only if the cap allowed it.

Now change one detail: your spend is LKR 4,000. Offer B requires LKR 6,000 minimum, so it's out. Offer A: 15% of LKR 4,000 = LKR 600. Offer A wins by default.

This kind of five-minute calculation before a purchase is the part most shoppers skip, and it's also the most reliably useful habit.

Common Mistakes When Comparing Offers

Comparing percentages without spending levels. A higher percentage is only better if your spending level stays below both caps. At high spend levels, the cap often determines which offer wins, not the rate.

Ignoring the card requirement. If you only hold one of the two eligible cards, the comparison simplifies immediately. Check eligibility first.

Assuming both apply at the same outlet. Offers from different banks often have different partner merchants. Confirm that both apply at the branch you're visiting, not just at the chain in general.

Not checking the validity date. A better deal that expired yesterday is worth nothing. Verify both offers are live on the date of your visit. The island-wide offers page on Offer Cabin lists only currently live promotions, with ended ones clearly marked expired.

Treating the saving as a reason to spend more. If Offer B becomes better at LKR 10,000 of spend but your natural purchase is LKR 7,000, spending an extra LKR 3,000 to unlock an extra LKR 50 in saving is a net loss. Compare offers at your natural spend level, not at the level that flatters either offer.

When the Better Offer Isn't Obvious

Sometimes the comparison produces a tie or a very small difference. In those cases, a few secondary factors are worth considering: which card earns better base rewards, which outlet is more convenient, and whether one offer has a shorter validity window that makes it more urgent to use.

If both offers apply at the same outlet, on the same card, with near-identical savings at your spending level, pick whichever is simpler to use and move on. The effort of optimising a LKR 100 difference is rarely worthwhile.

📍 Find live offers: browse the latest island-wide offers, or explore all categories.

Frequently Asked Questions

Pick the Better Deal Before You Leave the House

Knowing how to compare two offers comes down to running the same five-step check on each: card, minimum, percentage, cap, outlet and date. It takes two minutes with the offer pages open. Start with island-wide offers to see every live promotion, open the pages for both deals you're considering, and run the numbers at your expected spend. The better deal will be clear before you leave the house.