Why Did My Card Processing Fees Suddenly Go Up?

If your processing statement shows a higher rate than last month and nobody told you why, there are usually a small number of real causes behind it. Most of them are legal, common across the industry, and rarely explained clearly on the statement itself. This article walks through the most likely reasons, in the order worth checking first.

Did your interchange rates change automatically?

Visa and Mastercard update their interchange rate schedules twice a year, typically in April and October (current interchange rate reference, weAudit). These updates can raise or lower rates for specific card categories, add new card product tiers, or change which transactions qualify for a lower rate. Every processor pays the same interchange on the same transaction, so when the schedule moves, the cost moves for every provider at once, not just yours.

Most merchants are never notified when this happens (same source). The change usually shows up as a slightly higher blended cost on the next statement, with no explanation attached.

Did your card mix change?

Interchange isn’t one number. It’s set per card type, and premium cards, corporate cards, and cards used for card-not-present transactions carry a higher rate than a standard local debit card. If your customer base has shifted, more tourists, more corporate accounts, more online orders, the average cost of accepting a card goes up even though nothing about your contract changed.

This is one of the more common causes and one of the least visible, because the shift usually happens gradually over several months rather than as a single event.

Is your introductory rate expiring?

Some providers sign merchants up with a promotional rate that resets to a standard rate after an initial period. If your rate increased at a specific, clean date rather than gradually, check your original contract for a rate review clause or an introductory period. This is the easiest cause to confirm, since it should be written down somewhere in what you originally signed.

Is your rate bundled into one number, or set clearly per card type?

Some plans quote a single “all-in” percentage that bundles several card types and payment methods together. That’s easy to sell, but it also makes it hard to tell which part of your cost actually moved when the number changes, since you were never told the rate per card type to begin with.

A provider that prices Visa, Mastercard, JCB, CUP, Amex, e-wallets and international cards separately gives you a clearer picture, even though the total still moves with your card mix, that part comes down to which cards your customers use, not the provider. The difference is whether you can actually see which category shifted, or you’re just staring at one bundled figure with no way to diagnose it.

If your statement doesn’t break down which card types you’re being charged what, ask your provider for that breakdown directly. If they can’t or won’t provide it, that’s worth factoring into whether you stay.

Did a dispute or chargeback change your risk profile?

If your chargeback or dispute rate has increased, some processors reprice the account or add a reserve requirement to cover the added risk. This isn’t always flagged clearly as the reason on the statement, it can just appear as a rate increase with a generic note about “account review.”

Are you paying a PCI non-compliance fee?

Card processing contracts generally require merchants to complete an annual PCI DSS self-assessment. If that hasn’t been completed, a monthly non-compliance fee is common and can look identical to a rate increase on a statement that isn’t itemised clearly.

Why this is hard to catch on your own

This isn’t just a Singapore merchant problem. In March 2026, a written question was raised in the Singapore Parliament asking whether the Monetary Authority of Singapore tracks how much of banks’ revenue comes from Visa and Mastercard interchange fees, network incentives, and co-branding arrangements (Singapore Parliament questions Visa and Mastercard fees, BB Merchant Services). It reflects a wider point: the headline rate on a merchant statement rarely tells the full story, since interchange, scheme fees, processing markup, and gateway charges can each move independently of one another.

In practice, that means a rate increase can be entirely legitimate and still be nearly impossible to explain from the statement alone.

What to do if your fees went up

Pull your last two or three statements and compare the effective rate, total fees divided by total card volume, not just the headline percentage. Ask your provider directly what changed and ask for it in writing, a legitimate rate change should have a clear cause behind it. If the answer is vague or the rate has drifted more than once without explanation, it’s worth getting a second set of eyes on the statement.

Where Sambapay fits in

Sambapay quotes rates per card network, Visa, Mastercard, JCB, CUP and Amex priced individually, rather than one bundled number, so if your rate moves, you can see which category shifted instead of guessing. Merchants in their first year of operation, or new to accepting Visa and Mastercard, get rates from 1.8 percent through the SMB program. There are no recurring monthly fees, and setup and terminal costs can be waived for qualifying merchants. If you’re not sure why your current rate changed, the free Payment Cost Review looks at your actual statement and shows you the real number, not an estimate.

FAQ

Is a rate increase always a sign my provider is overcharging me? Not necessarily. Interchange itself moves twice a year regardless of provider, and that portion isn’t something any processor controls. What’s worth checking is whether the increase matches a real interchange update or your own card mix, or whether it’s an unexplained markup change on your provider’s side.

How do I know if my rate is bundled or set clearly per card type? Ask your provider for a breakdown showing what you’re charged for each card type separately, Visa, Mastercard, Amex, e-wallets and so on. If they can only give you one all-in percentage with no breakdown, you won’t be able to tell which category is driving a change when your rate moves.

Can I switch providers if I’m still under contract? Usually, but check your current contract for an early termination clause first, some contracts charge a penalty for switching before the term ends. Confirm this before starting a switch so there are no surprises.

This article is general information, not financial or legal advice. Processing rates, fees and terms can change, and interchange updates are set by the card networks, not by Sambapay. Confirm current rates and terms directly with Sambapay.