Are Card Processing Fees Eating Into Your Profit? Here's How to Calculate Them

Credit card processing fees reduce the amount a business receives from each card transaction. For a business selling products online, collecting subscription payments or accepting payments from international customers, these charges can affect profit margins, cash flow and pricing decisions.

The challenge is that there is no single card processing fee for every business. The amount depends on the payment provider, the country where the business operates, the type of card used, the transaction currency and the provider’s pricing structure.

These fees come out of your sales revenue, so it is worth knowing exactly what your provider charges and how much you lose to processing each month.

This guide explains how card processing fees work, the charges businesses should look out for and the practical steps you can take to manage them.

What Are Credit Card Processing Fees?

Credit card processing fees are charges incurred when a business accepts a card payment from a customer. Although people commonly call them credit card fees, they can also apply to debit cards and other eligible payment cards.

When a customer pays by card, several parties may be involved in authorising the payment, transferring the funds and settling the transaction. The business pays fees for this service, usually as a percentage of the transaction amount, a fixed fee or a combination of both.

For example, if a customer pays ₦50,000 for a product and the processing fee is 2%, the business pays ₦1,000 in processing fees. It receives ₦49,000 before accounting for other applicable charges and business expenses.

Across the payment industry, average processing fees generally range between 1.5% and 3.5% per transaction, with lower rates applying to face-to-face card swipes and higher rates charged for online, card-not-present transactions due to increased fraud risks 

The actual rate, most importantly, depends on the provider’s pricing and the terms of the merchant agreement.

How Card Processing Fees Work

Card processing involves several parties, including the customer’s bank, the card network and the payment processor or acquiring institution that helps the business accept payments.

The fees associated with a transaction generally fall into three categories.

1. Interchange fees

Interchange fees are paid to the bank or financial institution that issued the customer’s card. They compensate the issuing institution for its role in the transaction and the associated risks. The rates can also vary according to the card type, transaction category, country, payment method and whether the transaction takes place online or in person.

A business may not see interchange as a separate line item when using a provider with bundled pricing. However, interchange can still form part of the provider’s underlying processing costs.

2. Card network fees

Card networks, such as Visa and Mastercard, facilitate communication between financial institutions and help establish the rules and infrastructure used to process card transactions. They charge network-related fees for their services. These charges may vary depending on the transaction, network rules and applicable pricing arrangements.

So, even though they both contribute to the cost of processing a card payment, network fees are different from interchange fees. 

3. Payment processor fees

Payment processors and acquiring institutions charge businesses for services such as payment authorisation, transaction routing, settlement and access to payment infrastructure. Depending on the provider, these charges may be presented as a single bundled rate or broken down into separate components.

For many small businesses, the processor’s published rate is the most visible part of the cost. However, businesses should also check for additional charges, including applicable taxes, refund fees, chargeback fees and currency conversion costs.

The Three Common Card Processing Pricing Models

Payment providers calculate their fees in different ways. Here are the three pricing models you are most likely to encounter and how each one affects what you pay.

1. Flat-rate pricing

With flat-rate pricing, the provider charges a predetermined rate for a category of transactions. The fee may combine interchange, network charges and the processor’s markup into one figure.

For example, a provider might charge 2.5% per eligible transaction. A business processing a ₦100,000 payment would pay ₦2,500 if that rate applied and no additional charges were due.

Flat-rate pricing is relatively easy to understand because the business does not need to calculate each underlying fee separately. However, the rate may not be the most economical option for every transaction type or business volume.

2. Interchange-plus pricing

Interchange-plus pricing separates the interchange fee from the processor’s markup. Depending on the agreement, network charges may also appear as separate line items.

A provider might charge the applicable interchange and network fees plus a markup of 0.5% and ₦50 per transaction. The final cost would depend on the underlying fees for that specific transaction. This structure provides greater visibility into the components of the processing cost. It can be useful for businesses with high transaction volumes that want to examine their fees in detail.

However, the calculation can be more complex, and the processor’s markup alone does not represent the full cost of accepting a payment.

3. Tiered pricing

Under tiered pricing, the provider groups transactions into categories with different rates. These categories may depend on factors such as the card used, how the transaction is processed and the provider’s classification rules.

The provider may offer qualified, mid-qualified and non-qualified rates, although the names and criteria vary. This model can make the final bill difficult to predict if the business does not understand how transactions are classified. Before accepting a tiered pricing agreement, ask for the criteria used to assign each transaction to a pricing category.

How to Calculate Your Card Processing Fees

You can estimate your processing costs by identifying the applicable percentage, any fixed transaction charge and any additional fees or taxes.

For a basic percentage-based fee, use this formula:

Processing fee = Transaction amount × Processing rate

If the provider also charges a fixed fee, use:

Total processing fee = (Transaction amount × Percentage rate) + Fixed fee

Consider a hypothetical provider that charges 2.5% plus ₦100 per transaction.

If a customer pays ₦20,000, the calculation is:

• Percentage fee: ₦20,000 × 2.5% = ₦500

• Fixed fee: ₦100

• Total processing fee: ₦600

• Amount remaining after processing fees: ₦19,400

This calculation excludes any additional taxes or charges that may apply.

The effective processing rate is the total processing cost divided by the transaction amount, multiplied by 100.

In this example, the effective rate is 3%, because the ₦600 fee represents 3% of the ₦20,000 payment.

So, note that a provider may advertise a percentage rate, but fixed charges can increase the effective rate, especially on smaller transactions.

How processing fees affect small transactions

Suppose a business processes two payments using the same hypothetical pricing structure of 2.5% plus ₦100.

For a ₦2,000 payment, the fee is ₦150, equivalent to 7.5% of the transaction value.

For a ₦100,000 payment, the fee is ₦2,600, equivalent to 2.6% of the transaction value.

The percentage charge is the same in both cases, but the fixed fee has a much greater proportional effect on the smaller payment.

Businesses with low-value transactions should pay particular attention to fixed charges, minimum fees and transaction limits when evaluating a provider.

Why International Card Payments Can Cost More

International card transactions can attract higher processing fees than domestic payments. The exact difference depends on the payment provider, the countries involved, the card network and the currency used.

Several factors contributing to the additional cost include: 

1. Cross-border processing: A transaction involving a card issued in another country may follow a different pricing schedule from a domestic payment.

2. Currency conversion: If the customer pays in one currency and the business receives settlement in another, a currency conversion charge or exchange-rate margin may apply.

3. Card type and network rules: Some card categories and transaction types carry different underlying costs.

4. International payment settings: Providers may apply different rates depending on where the card was issued and how the payment is classified.

For businesses serving customers across multiple countries, it is important to confirm the rate for each relevant payment category. A provider’s domestic rate may not reflect what the business pays when customers use international cards.

Also check whether the provider settles funds in the currency charged to the customer or converts them into the business’s local currency. The distinction can affect the final amount received.

Other Card Processing Costs to Watch

The advertised transaction fee is only one part of the cost of accepting card payments. Several other charges may affect your total expenses.

1. Refund fees

When a business refunds a customer, the provider may return the original processing fee, retain it or apply a separate refund charge. The policy varies by provider and transaction type.

Before selecting a payment provider, confirm what happens to the processing fee when a transaction is refunded. This matters particularly for businesses with high return rates or frequent cancellations.

2. Chargeback fees

A chargeback occurs when a cardholder disputes a transaction through their card issuer. The business may have to provide evidence to challenge the dispute, and the provider may charge a fee for handling it.

Chargeback costs can include the dispute fee and the value of the disputed transaction if the business loses the case. Repeated disputes may also affect the business’s standing with its payment provider.

Clear product descriptions, accurate billing information, accessible customer support and reliable transaction records can help reduce avoidable disputes.

3. Currency conversion costs

Currency conversion can affect the amount a business receives when a transaction crosses currencies. The cost may appear as a separate conversion fee, an exchange-rate margin or a combination of both.

Check the conversion rate used for settlement and compare it with the rate applied to the original transaction. Looking only at the advertised processing percentage may leave out a significant part of the total cost.

4. Taxes on processing fees

Depending on the country and the provider’s terms, taxes may apply to processing charges. These taxes can increase the amount deducted from a transaction.

Confirm whether a quoted fee includes applicable taxes or whether they are charged separately. This is especially important when comparing pricing from providers operating in different jurisdictions.

5. Settlement and account fees

Some payment services may charge for particular settlement arrangements, account services or other optional features. The availability and pricing of these services vary.

Review the provider’s complete fee schedule and merchant agreement rather than relying on a headline transaction rate alone.

How to Reduce Card Processing Costs

1. Calculate your effective processing rate

Review your processing statements and calculate your total processing charges as a percentage of the total value of card payments received.

Use this formula:

Effective processing rate = Total processing fees ÷ Total card transaction value × 100

Include applicable transaction fees, fixed charges, taxes and other processing-related costs. Keep unrelated business expenses separate so that the figure remains useful for comparing payment providers.

Calculate the rate over a representative period, such as a full month. This helps account for differences in transaction sizes and payment volumes.

2. Compare providers using your actual transaction mix

A provider’s advertised rate may not reflect the transactions your business processes most frequently. Review the proportion of domestic and international card payments, your average transaction value, your typical monthly volume and the currencies in which you collect payments. Ask shortlisted providers to estimate the cost of processing a representative sample of your transactions. Compare the resulting total rather than looking only at the lowest advertised percentage.

3. Negotiate when your transaction volume grows

Businesses that process substantial or consistent payment volumes may be eligible for customised pricing. If your transaction volume has increased, contact your provider and ask whether your current agreement can be reviewed. Bring records of your monthly volume, average transaction size, chargeback rate and existing processing costs.

The provider may or may not offer a discount, but having clear figures makes the discussion more useful.

4. Reduce avoidable chargebacks

Disputes create administrative work and can introduce additional fees. Make sure customers can identify your business on their statements, understand what they are purchasing and reach you when they need assistance.

For recurring payments, explain billing frequency and cancellation terms clearly. Keep order confirmations, delivery records and relevant customer communications in case a transaction is disputed.

5. Review refund policies

If your business frequently issues refunds, retained processing fees can become a recurring expense. Understand your provider’s refund policy and track the cost of refunds over time. You can then account for these expenses when setting prices, forecasting revenue and reviewing your returns policy.

6. Check currency conversion and settlement terms

If you accept payments from customers in different countries, compare the total cost of processing and receiving those funds. Review the transaction fee, conversion rate, settlement currency and any additional charges. A small difference in the exchange rate can affect your final proceeds when transaction volumes are high.

7. Revisit your agreement periodically

Your transaction volume, customer base and payment needs can change as your business grows. A pricing arrangement that suited your business at launch may no longer be appropriate.

Review your processing costs periodically and whenever your payment volume, average transaction value or share of international transactions changes significantly.

Should You Pass Card Processing Fees on to Customers?

Some businesses absorb processing fees as an operating expense. Others may be permitted to pass certain charges to customers, depending on local law, card-network rules and their provider’s terms.

Passing fees to customers may protect margins, but it can also affect the final price customers pay and their willingness to complete a purchase. So, before introducing a surcharge, check the laws and payment-network requirements that apply to your business and the customer’s location. Some jurisdictions restrict or prohibit surcharging, and additional disclosure requirements may apply.

If you cannot pass on the fee, account for processing costs when setting prices and calculating the margin on each sale.

How Can I Manage Card Processing Costs? 

Card processing is only one part of managing business payment costs. If your business also pays for international software, advertising and other services, currency conversion can add another layer of expense.

PIL helps African businesses fund eligible international expenses using naira, cedis or supported stablecoins, with virtual dollar cards for business spending. This gives you another way to manage what you spend, alongside what it costs to collect payments.

Need a simpler way to manage international business spending? Explore PIL and get started.

Frequently Asked Questions About Card Processing Fees

• What is a typical credit card processing fee?

There is no single rate that applies to every business. Processing fees vary by country, payment provider, card type, transaction channel, currency and pricing structure. Check the provider’s current fee schedule and calculate the effective rate for your own transactions.

• Are credit card processing fees the same as debit card fees?

Not always. Some providers apply the same rate to certain credit and debit card transactions, while others distinguish between card types or transaction categories. Check the provider’s pricing terms to establish which rate applies.

• Why are international card processing fees higher?

International card payments may involve cross-border processing, different interchange costs and currency conversion. Providers may also apply a separate rate to cards issued outside the merchant’s country. The exact reason and cost depend on the provider and transaction.

• Are card processing fees refundable?

It depends on the provider’s refund policy. Some providers retain the original processing fee when a transaction is refunded, while others may apply different rules or charges. Confirm the policy before choosing a payment service.

• Can a small business negotiate card processing fees?

Some providers offer customised pricing or volume-based discounts to eligible businesses. Your chances depend on factors such as transaction volume, average payment value, business category and risk profile. Ask your provider whether your account qualifies for a pricing review.

• Do card processing fees include VAT?

Not necessarily. Tax treatment depends on the country, provider and applicable rules. Check whether the published rate includes taxes or whether they are added to the processing charge.