How to Read a Merchant Statement and Find What You Really Pay

Your merchant statement tells you what accepting cards really cost you last month, but only if you read it in the right order. This guide goes through it line by line: what each section is, which fees you can negotiate, how to calculate your effective rate and markup, and how to compare processors on your own transactions. What each fee is and what processors charge is covered in what is a transaction fee; here, the job is checking your own numbers.

What is a merchant statement?

A merchant statement is the record your payment processor gives you for a period, usually a month: what you processed, what was refunded or disputed, the fees taken, and the net amount paid into your bank account. It's not a bill. The fees have already been deducted.

Ecommerce merchants rarely receive the classic printed statement. Payment platforms give you the same information as reports and exports:

Processor	Where the statement lives	What it shows per transaction
Stripe	Reports > All fees, downloaded as Itemized	One or more fee rows per charge, refund or payout, with a description, amount and tax
Shopify Payments	Settings > Payments > View payouts > View transactions > Export	Amount, Fee and Net for each transaction, with the card brand
Adyen	Payment accounting report	Commission, or Interchange, Scheme Fees and Markup as separate columns

Stripe's itemized Fees report lists fees from Stripe, the card networks and other partners, and becomes available within 96 hours after a fee hits your balance.2Stripe Docs, Fees report Each Stripe balance transaction carries a gross amount, a fee and a net, where net equals amount minus fee.3Stripe API reference, The Balance Transaction object Shopify's payout export has the same three columns.4Shopify Help Center, Viewing and exporting your Shopify Payments payout details Adyen splits its commission into Markup, Scheme Fees and Interchange when the acquirer provides interchange-level data, and shows a single Commission figure otherwise.5Adyen Docs, Payment accounting report

The six parts of a merchant statement

Layouts differ from one processor to the next, but the content is the same.

Sort every fee line: wholesale or markup

Each line on a statement belongs to one of two families. Wholesale costs go to the card networks and the customer's bank, and every processor pays the same. Markup is what your processor keeps, and it's the part you can negotiate.

Statement labels vary by processor, and a fee named after a card brand isn't always charged by the card brand. Look at the amount and ask who receives it. Common labels include CHBK or C/B for chargebacks, RTN or RFD for refunds, AUTH for authorization fees, AVS for address verification, and STD or non-qualified for downgraded sales.

Step 1: calculate your effective rate

Your effective rate is everything you paid divided by everything you processed, for the same period. It's the single number that tells you whether your costs moved.

Three rules make the number reliable:

• Count every fee. Processing, network, international and currency conversion fees, dispute fees, payout fees, monthly and gateway fees. A summary box may leave some out.
• Use the right dates. On interchange-plus at Stripe, card networks can bill fees for a payment up to two months after it was processed, and the fees are attributed to the original transaction date.1Stripe Support, Reviewing IC+ fees: Stripe fees and Network Costs Run the report on the date the fee was incurred, and look at two or three months together before drawing conclusions.
• Keep the same volume basis. Gross volume before refunds, or net after refunds, but the same one every month. Fees on refunded orders usually stay with the processor.10Stripe Docs, Refund and cancel payments

Then compare the effective rate with your headline rate. A gap of a few tenths of a point usually comes from foreign cards, currency conversion, premium cards or disputes. A gap that grows month after month while your sales mix stays the same is a reason to read the fee detail line by line.

Step 2: identify your pricing model from the statement

The statement tells you how you're billed, even if you've forgotten what you signed.

Flat-rate pricing is what most ecommerce platforms use by default, such as Stripe's standard 2.9% + 30¢ for domestic cards in the US.7Stripe, Pricing (United States), October 2026 Interchange-plus pricing passes the wholesale costs through and adds a markup. Tiered pricing lets the processor decide which bucket each sale falls into, which is why it's the hardest model to audit.

Step 3: find your effective markup

On an interchange-plus statement, you can isolate what your processor really earns:

Effective markup = (total fees − interchange − network fees) ÷ card volume

With the month above on interchange-plus terms, $1,690 of interchange and $205 of network fees leave $866 of markup, or 1.05% of volume. That's the number to compare between processors and to negotiate. It's illustrative; your statement gives you the real lines.

At Stripe, the transaction-level Payments fees report splits IC+ fees into Stripe fees (a percentage volume_fee and a fixed per_auth_fee) and network costs (interchange, card_scheme, non_transactional_card_scheme and discount), and its plan_name column names the interchange plan applied.1Stripe Support, Reviewing IC+ fees: Stripe fees and Network Costs At Adyen, the Markup column is "the fee charged by the acquiring bank," Scheme Fees are charged by networks such as Visa or Mastercard, and Interchange by the issuing bank.5Adyen Docs, Payment accounting report

If your statement blends interchange into one rate, you can't calculate your markup. Track the effective rate instead, and ask your processor for an interchange-plus quote.

What are assessment fees on a merchant statement?

Assessments, also called network or scheme fees, are what Visa, Mastercard and the other networks charge to use their network. Your acquirer pays them and passes them on. On interchange-plus statements, they show up as a set of small lines per network: some per transaction, some as a percentage of volume, some not tied to a single payment.

They're the hardest line to verify. Interchange has public tables; network fees mostly don't. Stripe's own guide to IC+ fees notes that card networks generally don't publish scheme fees.1Stripe Support, Reviewing IC+ fees: Stripe fees and Network Costs What you can check is consistency: the same lines, at similar amounts relative to volume, month after month. A new line, or one that grows faster than your sales, is a question for your processor.

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Step 4: check interchange for downgrades

You can't negotiate interchange, but you can check that each sale was charged the rate it qualified for. A sale that misses the network's requirements is downgraded to a more expensive rate.

On Visa's April 2026 US table, a qualifying online sale on a basic consumer credit card costs 1.89% + $0.10, and the same sale downgraded to non-qualified costs 3.15% + $0.10. A subscription renewal on a rewards card, flagged as recurring, costs 1.53% + $0.05 instead of 2.04% + $0.10.8Visa, Visa USA Interchange Reimbursement Fees, rates effective April 18, 2026 On an interchange-plus statement, look at the plan names: a large share of sales on a non-qualified or "standard" plan usually means missing data, such as the recurring indicator or address details. The fixes are in our guide to interchange fees, including interchange optimization and Level 2 and Level 3 data for business cards.

On a flat-rate statement, downgrades don't show and don't change your fee. The processor absorbs them, which is part of what the flat rate pays for.

In the EU, you have a right to the itemized version

The EU interchange regulation makes the breakdown a legal requirement for consumer cards. Acquirers must quote and charge separate merchant service charges by card category and brand, unless you ask them in writing for a blended rate, and must list the interchange and scheme fees for each category in your agreement (Article 9).9Regulation (EU) 2015/751 on interchange fees for card-based payment transactions, Articles 9 and 12

The same article lets the acquirer group this information by brand, application, card category and interchange rate, but only with your prior and explicit consent, and allows it to be provided at least once a month in a format you can store.9Regulation (EU) 2015/751 on interchange fees for card-based payment transactions, Articles 9 and 12 If your EU statement shows one blended number and you never asked for one in writing, ask your acquirer for the itemized version.

Step 5: calculate the cost per successful payment

The effective rate divides fees by volume. It doesn't show what failed attempts, refunds and disputes cost you. The cost per successful payment does: everything you paid, divided by the payments you actually kept.

Failed attempts aren't free everywhere. At Stripe, on IC+ pricing, the per-authorization fee applies to every request sent to a payment method, including declined authorizations, voids, reversals and card validations.1Stripe Support, Reviewing IC+ fees: Stripe fees and Network Costs Retrying a declined card many times adds to that line. Refunds usually leave the original fee with the processor, while canceling an uncaptured payment costs nothing.10Stripe Docs, Refund and cancel payments At Stripe in the US, a dispute costs $15, plus $15 more if you respond, returned if you win.11Stripe Docs, Respond to disputes

This is why a cheaper rate can cost more. A processor with a lower markup that approves fewer of your customers' cards gives you fewer payments to spread the cost over, and fewer sales. To measure approvals, see our guide to payment acceptance rate.

Step 6: compare processors on the same transactions

A quote is a rate card. To compare it with what you pay now, run your own past transactions through both. Take last month's itemized export, and for each transaction, calculate what it would have cost under each offer.

Rates: Stripe's standard US pricing; Adyen's published pricing, which is indicative and comes with a minimum invoice that depends on the industry; Visa's April 2026 interchange table.6Adyen, Pricing7Stripe, Pricing (United States), October 20268Visa, Visa USA Interchange Reimbursement Fees, rates effective April 18, 2026 Scheme fees aren't published, so add an estimate from your current interchange-plus statement if you have one. Then add the parts that don't show on a rate card: foreign card and conversion fees, dispute fees, monthly minimums, and the approval rate each processor gets on your traffic. For the other criteria, see our payment processor comparison.

Step 7: reconcile the statement with your bank account

The last check: what the statement says was paid out must match what reached your bank.

Sources: Shopify Help Center; Stripe API reference.4Shopify Help Center, Viewing and exporting your Shopify Payments payout details3Stripe API reference, The Balance Transaction object Stripe also documents how to reconcile its Fees report with the balance reports: set the date basis to the balance transaction date and use the same range in both.2Stripe Docs, Fees report

Common mistakes when reading a merchant statement

None of this needs special software. A spreadsheet with your itemized export, a monthly effective rate and, when your statement allows it, a monthly effective markup are enough to see a change the month it happens. For surcharging as a way to pass the cost on, read our guide to credit card surcharges first: it moves the cost, it doesn't lower it.

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