How Credit Card Cashback and Miles Are Calculated

Where cashback and miles actually come from

Every card transaction generates an interchange fee, a small percentage the merchant's bank pays to the cardholder's bank, set by the card network and typically ranging from roughly one to three per cent of the transaction value depending on the card type and merchant category.

Cashback and mile rewards are funded largely out of this interchange revenue, not out of the bank's own pocket as a goodwill gesture, which is why reward rates track fairly closely with how much interchange a given card and merchant category actually generates.

Why interchange rates differ by merchant category

Card networks set different interchange rates for different types of merchants, with categories like travel, dining, and department stores generally carrying higher rates than categories like groceries, fuel, or government payments, which typically operate on thinner margins.

This is the underlying reason a card's cashback rate is rarely flat across every purchase type, higher-interchange categories can afford to fund a richer reward, while lower-interchange categories fund a smaller one or none at all.

How the issuer's economics actually work

The issuing bank keeps a portion of the interchange fee as its own margin, funds the reward paid to the cardholder from another portion, and covers the cost of fraud protection, customer service, and the rewards programme's operating cost from what remains.

A card advertising a very high headline cashback rate on a specific category is, in effect, signalling that the issuer expects to earn enough interchange and other revenue from that category's typical spending pattern to make the reward sustainable.

Why annual fees exist alongside rewards

Premium cashback and miles cards commonly carry an annual fee precisely because the richest reward rates cost more to fund than interchange revenue alone reliably covers, so the fee closes the gap and keeps the programme profitable for the issuer regardless of how much any individual cardholder spends.

This means a card's true value has to be judged net of its annual fee, a shopper spending too little to offset the fee through actual rewards earned is, in practice, paying the bank for the privilege of holding the card.

Interest is the other major funding source

Beyond interchange, a meaningful share of a rewards card programme's profitability comes from cardholders who carry a revolving balance and pay interest, since the interest rate on an unpaid balance is typically far higher than the value of any cashback or miles earned on the same spending.

This is the single most important number for a rewards card user to control: paying the statement balance in full every cycle is what keeps the rewards genuinely free, while carrying even a small balance can erase the entire value of the programme within a month or two.

Why the advertised earn rate is not the full picture

A card marketed as earning up to five per cent cashback almost always applies that top rate only to a specific, often narrow category, a capped monthly spending amount, or a limited introductory period, with the effective rate on everyday total spending sitting meaningfully lower.

Reading past the headline number to the category caps, spending thresholds, and any monthly or annual reward ceiling is necessary to estimate what a card will actually pay out based on a real spending pattern, not the marketing scenario used in the advertisement.

How redemption value can differ sharply from the earn rate

Earning cashback or points is only half the equation, redemption value, what those points or miles are actually worth when converted to cash, a statement credit, or a flight, can vary significantly depending on how and where they're redeemed.

Redeeming miles for a flight during a high-demand period, or converting cashback points to a gift card at an unfavourable internal exchange rate, can deliver noticeably less value per point than redeeming during a promotional period or for a flexible statement credit.

Why airline miles are harder to value than cashback

Cashback has an obvious, fixed value, a dirham or riyal earned is worth exactly that in cash or statement credit. Miles have a variable value that depends entirely on the specific flight redeemed, since airline award charts price the same mile differently depending on route, cabin class, and how far in advance the booking is made.

This variability means miles can occasionally be worth several times their nominal per-mile value on a well-chosen premium cabin redemption, or well below it on a poorly chosen economy redemption during peak season.

Comparing a cashback card to a miles card for a typical shopper

A cashback card suits a shopper whose spending is broad and general, groceries, fuel, bills, and everyday retail, because the reward's value is guaranteed and immediately usable without needing to research redemption strategy.

A miles card suits a shopper who travels regularly enough to redeem miles for flights they'd book anyway, since the potential upside in redemption value only materialises for someone who actually uses the airline programme rather than letting miles sit unredeemed.

How to estimate the real value of a specific spending pattern

A useful practical exercise is mapping the past three months of actual spending against a candidate card's category rates and caps, rather than relying on the average consumer's spending pattern the bank uses in its own marketing calculator.

This bottom-up estimate usually reveals that a card advertised as best overall is not necessarily the best fit for a specific shopper's actual mix of groceries, dining, fuel, and bills, since the richest category rate might sit on a category that shopper barely spends in.

Why excluded categories quietly erode advertised value

Most cashback cards explicitly exclude certain spending categories from earning any reward at all, commonly government fees, utility bill payments beyond a cap, cash withdrawals, and sometimes education or insurance payments, categories that make up a meaningful share of many households' monthly spending.

A shopper whose spending leans heavily toward these excluded categories will realise a much lower blended cashback rate than the headline percentage suggests, regardless of how attractive the card's marketed rate looks on paper.

The role of minimum spend thresholds and monthly caps

Many cards require a minimum monthly spend to unlock the advertised top-tier cashback rate at all, and separately cap the total cashback earned in a category or overall per month, meaning heavy spending past the cap earns nothing extra in that category.

Both thresholds matter for the same reason, a shopper whose real monthly spend sits just under the minimum, or well past the cap, is effectively earning at a much lower blended rate than the number printed on the card's marketing page.

Why comparing UAE and Saudi cards requires reading the fine print carefully

Regional banks frequently structure cashback cards around a handful of accelerated categories, supermarkets, fuel, or dining, at a notably higher rate than the base rate applied to everything else, a structure that rewards a shopper whose spending concentrates in those specific categories far more than one whose spending is evenly spread.

Two cards advertising an identical top headline rate can produce very different actual annual cashback for the same shopper purely because of how differently their category structures and caps are built underneath that headline number.

Why some issuers prefer points over direct cashback

A points-based system, redeemable across multiple options like statement credit, merchandise, or miles transfer, gives the issuer more control over the effective cost of redemption, since internal exchange rates between points and each redemption option can be adjusted by the bank over time.

Direct cashback, deposited automatically as cash or a fixed statement credit, is simpler and more transparent for the cardholder precisely because it removes this internal valuation step the issuer would otherwise control.

How promotional bonus periods fit into the economics

Sign-up bonuses and limited-time category multipliers are customer acquisition and retention costs the issuer is willing to absorb temporarily, betting that the new cardholder's ongoing spending, and any interest paid on a carried balance, will more than offset the promotional cost over the relationship's life.

Recognising a promotional rate as temporary, rather than assuming it represents the card's permanent value, matters when comparing a card's long-term worth after the introductory period ends.

Why some categories are deliberately excluded from earning rewards

Categories like cash advances, balance transfers, and certain quasi-cash transactions typically earn no reward at all, because these transaction types carry higher risk or lower interchange for the issuer, making them economically unattractive to reward in the first place.

Government and certain utility payments processed through specific low-margin payment rails are similarly excluded in many card terms, a detail easy to miss until a shopper notices a government fee payment earned zero cashback on their statement.

The overlooked cost of foreign currency transactions

A card's foreign transaction fee, commonly around two to three per cent, applies to purchases made in a currency other than the card's billing currency, and this fee is subtracted before any cashback is calculated, meaning international online purchases can net a much lower effective reward than domestic spending.

A shopper who frequently buys from international online retailers should weigh a card's foreign transaction fee against its cashback rate together, since a high headline rate paired with a high foreign fee can still net out worse than a lower-rate card with no foreign fee.

Why comparing effective rate, not headline rate, is the right frame

The effective rate is what a shopper actually earns after accounting for category caps, excluded spending, annual fees, and any foreign transaction costs, calculated across their real total spending for a full year rather than a single best-case category purchase.

This number is rarely printed anywhere by the issuer and has to be calculated by the shopper themselves, which is precisely why headline rates dominate marketing while effective rates determine actual value.

The overspending trap that erases rewards entirely

A well-documented behavioural pattern shows cardholders on rewards cards tend to spend somewhat more than they would on a non-rewards card, chasing the reward itself, a spending increase that can easily exceed the value of the cashback or miles actually earned.

For this reason, a cashback or miles card only creates genuine value when the underlying spending would have happened anyway, on a card that would have charged the same interchange-funded no-reward economics regardless of which product the shopper chose.

How to compare two cards head to head properly

The fair comparison method takes each candidate card's category rates and caps, applies them to the same twelve months of a shopper's actual historical spending, subtracts each card's annual fee, and only then compares the resulting net reward figures against each other.

This process reliably surfaces cases where a no-annual-fee card with a modest flat rate outperforms a premium card with a high headline rate but narrow bonus categories, for a shopper whose spending doesn't concentrate in that card's specific bonus categories.

Why a shopper's travel frequency should decide cashback versus miles

A shopper who books two or fewer flights a year is generally better served by cashback, since the guaranteed, flexible value outweighs the speculative upside of accumulating miles that may sit unused or expire before enough accrue for a meaningful redemption.

A shopper who travels frequently enough to consistently redeem miles for flights they'd book regardless can often extract more value per riyal or dirham spent through a well-chosen miles programme than through cashback, particularly on premium cabin redemptions.

The hybrid option worth considering

Some issuers offer a flexible points currency that can be redeemed either as a fixed-value statement credit or transferred to airline and hotel partners at a variable rate, giving a shopper the cashback-like reliability as a floor while preserving the upside of a good miles redemption when the opportunity arises.

This hybrid structure suits a shopper whose travel frequency is irregular, occasional enough that a dedicated miles card doesn't always make sense, but frequent enough that giving up all upside to pure cashback feels like leaving value on the table.

Why credit score and approval odds factor into the comparison

The richest cashback and miles cards in the UAE and Saudi markets typically require a higher minimum salary or income threshold and a clean credit history, so the theoretical best card on paper isn't always the card a given applicant will actually be approved for.

Comparing realistic, approvable options rather than aspirational premium cards produces a more useful shortlist for most shoppers than starting from the card with the single highest advertised reward rate.

What to check before switching primary cards for better rewards

Before switching, it's worth confirming the new card's category structure actually matches recurring spending, checking whether closing or downgrading the old card affects overall available credit and credit history length, and confirming any welcome bonus terms don't require spending beyond the normal monthly budget to unlock.

Chasing a marginally better headline rate by switching cards frequently can cost more in foregone loyalty benefits, annual fees during the transition, and administrative hassle than the incremental reward difference is actually worth.

How merchants and shoppers both end up paying for rewards indirectly

Merchants factor interchange costs into their overall pricing, meaning the price a shopper pays for a product is, in aggregate across the market, slightly higher than it would be in a world with no card rewards at all, a cost spread across all shoppers including those paying by cash or debit.

This is why economists describe card rewards as a transfer from cash-paying shoppers, who don't earn any reward but still pay prices that reflect interchange costs, toward rewards-card shoppers who do collect the cashback or miles.

Why points expiry rules quietly reduce real value

Many miles and points programmes attach an expiry date to unredeemed balances, sometimes tied to a period of account inactivity rather than a fixed number of years, and a shopper who forgets to redeem or keep the account active can lose accumulated value entirely.

Expiry policies rarely feature in a card's marketing but materially affect the true expected value of a rewards programme, since the theoretical earn rate assumes every point is eventually redeemed, an assumption that doesn't always hold in practice.

Comparing a rewards card against simply negotiating a better price

For large, planned purchases, some shoppers overlook that negotiating the item's price directly, or timing the purchase to a genuine seasonal sale, can outweigh whatever cashback percentage a card would earn on the same transaction.

The two aren't mutually exclusive, a shopper who negotiates the best available price and pays with the right rewards card captures both savings layers, but treating cashback as the primary lever while ignoring the underlying price is usually the less effective approach.

Edge case: cards that charge no annual fee at all

A no-annual-fee cashback card typically offers a modest, flat rate across most categories rather than a rich, tiered structure, because the issuer has no fee revenue to help fund a more generous reward, relying almost entirely on interchange and interest income instead.

For a shopper with average, evenly spread spending who wants simplicity over optimisation, a solid no-fee flat-rate card can outperform a fee-charging card with a complex category structure that shopper won't fully exploit anyway.

Why welcome bonuses look larger than they really are

A sign-up bonus quoted as a lump sum of cashback or a large block of miles can look disproportionately generous compared with the ongoing earn rate, since it's a one-time acquisition cost the issuer pays once rather than an indicator of the card's long-term reward value.

Spreading that bonus across a realistic twelve-month spending estimate, rather than treating it as free money on top of the ongoing rate, gives a more honest sense of whether the card's total first-year value justifies any annual fee attached to it.

How supplementary card holders factor into the reward calculation

Spending on a supplementary card issued to a family member typically earns the same reward rate as the primary card and counts toward the same caps and thresholds, which can help a household reach a minimum spend requirement faster but also means the shared cap fills up sooner.

Treating household spending as a single combined pool when estimating annual reward value, rather than calculating the primary cardholder's spending in isolation, produces a more accurate picture for families sharing one rewards account.

Why some issuers now blend cashback and miles into one flexible product

A newer trend among regional issuers is a single card offering a base cashback rate with the option to convert accumulated cashback into airline miles at a published, fixed conversion rate, letting a shopper choose the redemption path after seeing how their year of spending actually played out.

This removes some of the upfront guesswork of committing to a pure cashback or pure miles product before knowing whether travel plans for the year will materialise, at the cost of typically offering a less generous rate than a dedicated single-purpose card in either direction.

What actually matters when choosing between cashback and miles

The reward exists because the merchant paid an interchange fee, not because the bank is being generous, so the real comparison is always net value: earn rate minus exclusions, caps, and annual fees, against a shopper's actual spending pattern and how reliably they pay the statement in full.

For most UAE and Saudi shoppers with irregular or infrequent travel, cashback's guaranteed, immediately usable value beats the speculative upside of miles; for a frequent flyer who redeems well, the reverse can be true, but only when the discipline of paying in full every cycle is already in place.

Sources

1. Wikipedia: Interchange fee — Explains how interchange fees work and fund card rewards programmes.
2. Investopedia: Credit card rewards — Background on how cashback and points programmes are structured and funded.
3. Central Bank of the UAE — Source on UAE consumer credit regulation relevant to card products.
4. Khaleej Times: Business coverage — Regional reporting on UAE credit card rewards market and comparisons.