Each time a customer pays with a debit card, you’ll pay a debit card processing fee. The cost depends on a few factors:
- Interchange rates.
- Your payment processing company’s markups.
- The payment processing fee structure.
Here’s a breakdown of how debit card processing works and the fees that come along with it.
How does debit card processing work?
A lot goes on behind the scenes when your customer pays with a card. You can break debit card processing down into several steps:
- A customer submits their debit card to pay for a transaction.
- They swipe, dip or tap their card using a card reader.
- Your point-of-sale (POS) system reads the card information and transmits the data to the customer’s card processing network (Visa, MasterCard, etc.).
- The processing network verifies the data and evaluates it for possible fraud.
- The processing network sends the data to the bank that issued the customer’s debit card.
- That issuing bank confirms that enough funds are available. Then it passes an approval along to the merchant or business owner.
This process occurs in only seconds. It's part of why debit cards (and credit cards) are such an efficient form of payment.
Once the transaction is approved, the debit card network verifies the amount you’re owed. Then it sends that money to your merchant account. Typically this last part is done quickly, sometimes even the same day.
How much do debit card processing fees cost?
Debit card processing typically costs somewhere around 2.6% plus 10 cents per in-person transaction and 2.9% plus 30 cents per online transaction if you're using a flat-rate processor. Interchange-plus processors like Helcim charge 0.4% plus 8 cents and interchange per in-person purchase and 0.5% plus 25 cents and interchange per online one.
Debit card transactions cost an average of 34 cents (or 0.73% of the transaction total) in interchange fees, according to the Federal Reserve. Interchange fees, which go to the card-issuing bank, usually make up the bulk of the processing cost.
Payment processors also charge their own markups on top of interchange. These vary from one provider to the next. They depend on whether the processor uses a flat-rate or interchange-plus pricing structure.
How do flat-rate processors work?
Flat-rate processors treat all card transactions the same, regardless of interchange fees. That means you may pay the same credit card processing fees for debit card transactions. Here are the key things to know about this type of processing company:
- They combine your costs into one fee — usually around 2.6% plus 10 cents for in-person transactions.
- If your customers mostly pay with credit cards, flat-rate processors are a convenient option. That's because they make it easier to predict how much you’ll owe in processing fees.
- Lots of them use aggregated merchant accounts. This means you can start accepting payments almost instantly.
How do interchange-plus processors work?
Interchange-plus processors differentiate between debit and credit card transactions. Here’s what to know about them:
- This type of processor passes along interchange rates. These are generally much lower for debit cards than credit cards.
- Businesses that commonly accept debit cards will save money by going with this type of processor.
- Interchange-plus processors are more likely to require you to open an individual merchant account. These types of merchant accounts give you more control over your funds. But the application process can be time consuming.
Looking for debit card processing options?
Payment processing fees 0.40% + 8¢plus interchange, in-person; 0.50% + 25¢ plus interchange, online. | Payment processing fees 0% + 8¢plus interchange, in-person; 0% + 15¢ plus interchange, online. |
Monthly fee $0 | Monthly fee $79and up. |
Helcim: Best for basic interchange-plus pricing. Helcim’s interchange-plus model means lower rates for debit card transactions. Plus, the company has a free POS app. Read our full Helcim review.
Finix: Best for high-volume small businesses. Finix has exceptionally low markups, but charges a monthly fee for its processing services. If your business processes at least $5,000 in card payments each month, it may help you save in processing fees. Read our full Finix review.
Stripe: Best straightforward flat-rate pricing. Stripe charges the same processing fees for credit and debit card transactions. However, it doesn’t require you to go through the potentially lengthy process of opening an individual merchant account. Read our full Stripe review.
What determines debit card processing fees?
These are the primary factors that impact how much debit card processing costs your business:
Interchange fees
Interchange fees make up a large portion of debit card processing fees. Card networks determine these fees, which are paid to the card-issuing banks. These costs vary depending on the following:
- Whether the transaction is regulated or unregulated: Debit card-issuing banks that hold more than $10 billion in assets are subject to strict transaction regulations. These banks cannot legally charge more than 0.05% plus 21 cents (and an additional 1 cent in some cases) in interchange fees per debit card transaction. Those regulations do not apply to banks that hold less than $10 billion in assets.
- Whether the debit card is present: Interchange fees for card-not-present transactions are usually more expensive than for card-present ones. This is due to the additional security risk. Customers usually have to sign a receipt or enter a PIN number for card-present debit transactions. These steps help provide an added layer of security.
- Your business’s industry: Each business gets a merchant category code depending on its industry. Interchange rates vary from industry to industry and are higher for ones considered high risk.
- The current interchange rate: Interchange rates often change over time — sometimes even twice per year. For example, Visa updates interchange fees semiannually.
Payment processor markups
Payment processors add a markup for facilitating the debit card transaction. This is on top of interchange fees. The amount depends on your processor's pricing model.
Interchange-plus processors are more transparent about how much the markups vs. interchange rates cost. Flat-rate processors blend all of these fees together. This make it harder to tell which is which.
Starting Small: A newsletter to get your business off the ground
Subscribe for grant opportunities, product recommendations and no-nonsense advice from the Nerds.
What are the different types of debit card processing?
You can categorize debit card transactions according to how the card interacts with your POS system. This impacts how data gets transmitted and validated. Here are the most popular types of debit card processing methods:
PIN debit transactions
This is one of the most common types of debit card transactions. First, a customer chooses “debit” on the card terminal at checkout. Then the terminal prompts them to enter their four-digit PIN to verify their identity. You might also hear these referred to as online debit card transactions.
Signature debit transactions
After a customer chooses “credit" on the terminal, they sign a receipt instead of typing in their PIN. These transactions are also called offline debit card transactions. Credit card networks process them.
Contactless debit transactions
Customers make contactless debit transactions with a mobile device, smartwatch or contactless debit card. They're very similar to PIN transactions. The only difference is that customers hold the card or mobile device up to an NFC terminal to complete the transaction.
Of course, the debit card must be linked to the device through a mobile wallet, like Apple Pay or Google Pay. Once the POS terminal receives the card information, the process continues just like any PIN transaction.
Card-not-present transactions
E-commerce payments, keyed-in payments and card-on-file payments all fall under this category. Similar to signature debit transactions, credit card networks also handle card-not-present transactions. However, they usually carry higher processing fees and risk of fraud. This is because there isn’t the same level of verification.
A version of this article originally appeared on Fundera, a subsidiary of NerdWallet.
Dan Marticio contributed to this article.
Frequently Asked Questions
How much does a debit card transaction cost?
The average interchange fee for processing a debit card was about 34 cents per transaction, according to 2024 data from the Federal Reserve System.
The actual fees you pay, however, will vary depending on your merchant category, processing method, type of card, size of the issuing bank and whether your customer is using a PIN-based or signature-based transaction.
Do debit cards have processing fees?
Yes. Debit card processing fees involve interchange fees, which vary by card and bank, and payment processing fees, which vary by provider.
Can a business charge a debit card fee?
Many state laws allow for a business to charge a consumer an additional fee, called a surcharge, to pay by credit card. However, this is not allowed by law in any state for debit cards, even when the transaction is processed as “credit.”
Article sources
NerdWallet writers are subject matter authorities who use primary,
trustworthy sources to inform their work, including peer-reviewed
studies, government websites, academic research and interviews with
industry experts. All content is fact-checked for accuracy, timeliness
and relevance. You can learn more about NerdWallet's high
standards for journalism by reading our
editorial guidelines.
- 1. Federal Reserve. Average Debit Card Interchange Fee by Payment Card Network. Accessed Mar 6, 2026.
