Credit card processing costs for service companies

Why processing fees matter more in the trades

Card fees are a percentage of the transaction, so they grow with your average invoice. A cleaning company billing small recurring visits feels them as a steady drip; an HVAC company taking card payments on replacements feels them as a large cost on every install. Because the fee comes off revenue before anything else, it hits gross margin directly.

Customers use cards for repairs because many cannot pay from savings. Only 63% of US adults say they would cover a $400 emergency expense entirely with cash or its equivalent^[3]. A broken water heater or a failed AC compressor is an emergency for most households, which is why card acceptance, financing and clear payment options matter for close rates as well as cash flow.

Where the money goes

• Interchange: paid to the bank that issued the customer's card. It varies by card type (debit, standard credit, rewards, business, commercial), by how the card is taken (chip, tap, keyed, online) and by your business category. It is the largest part of the cost and the same for every processor.
• Network or assessment fees: paid to the card networks. Small, also the same for every processor.
• Processor markup: what your processor or payment platform charges on top. This is where processors compete and where you can negotiate.

Debit cards are the exception to the 'interchange is fixed' rule, because federal regulation caps it. Under the Federal Reserve's Regulation II, a covered debit card issuer may not receive an interchange fee above $0.21 plus 0.05% of the transaction value, plus a $0.01 fraud-prevention adjustment if eligible^[1]. In 2024, average interchange on covered debit transactions was $0.23, against $0.51 on exempt transactions from smaller issuers^[1].

Example arithmetic using the published cap: on a $500 repair, capped debit interchange is about 46 cents, or 47 with the fraud adjustment. Credit card interchange is not capped by this rule and is usually a percentage of the sale, so on a large invoice it costs far more. If your processor charges a single flat rate regardless of card type, you pay the high rate on cheap debit transactions too.

Pricing models compared

Field service platforms often bundle processing with their software, usually at a flat rate. That is convenient, and integration with invoicing has real value, but compare the effective rate against a standalone interchange-plus quote at least once a year.

Read your statement in five minutes

1. 01

   Find total card volume

   The dollar value of card sales processed in the month.

2. 02

   Find total fees

   Every fee on the statement: transaction fees, monthly fees, PCI or compliance fees, chargeback fees, equipment rental.

3. 03

   Calculate the effective rate

   Total fees ÷ total volume. This is the number to track and compare.

4. 04

   Check the mix

   Look at how much volume was keyed in, online or by phone rather than chip or tap. Keyed and card-not-present transactions usually cost more and carry higher fraud risk.

5. 05

   List fixed fees

   Monthly account, statement, PCI and gateway fees. On a small volume these can double the effective rate.

Track the effective rate on the same line every month, beside revenue. If it creeps up without a change in your card mix, ask the processor why. Our overhead cost control checklist includes bank and card fees in the quarterly review.

Example: one month of card payments

Example (fictional): an HVAC company processes $180,000 of card payments in a month on a flat-rate plan bundled with its field software, at 2.9% plus 30 cents per transaction across 420 transactions. Fees are $5,220 + $126 = $5,346, an effective rate of 2.97%.

Example analysis: 35% of volume is debit cards, and 40% of transactions are keyed in by the office over the phone because techs leave invoices for customers to pay later. Three replacement jobs, each over $9,000, were paid by card.

Example changes: techs take payment on site with tap or chip at job completion, which speeds up cash and cuts fraud risk; replacement customers are offered bank transfer or ACH, with card still available; and the owner gets an interchange-plus quote to compare. Moving the three large jobs to ACH alone saves roughly $800 in card fees that month. On an interchange-plus plan, the 35% of volume paid by debit would also be charged at the much lower regulated debit cost instead of the flat rate.

Ways to lower the cost

1. Take cards in person with chip or tap at the end of the job rather than keying them in later.
2. Offer ACH or bank transfer for large invoices, installs and commercial accounts. ACH costs are usually a small flat fee or a low percentage with a cap.
3. Ask for interchange-plus pricing once your volume justifies it, and compare at least two quotes using your last three statements.
4. For commercial customers paying with business or purchasing cards, ask your processor about sending enhanced (Level 2 or Level 3) invoice data, which can qualify for lower interchange.
5. Cut fixed fees: unused terminals, duplicate gateways, PCI non-compliance fees that disappear once you complete the annual questionnaire.
6. Reduce chargebacks with clear invoices, signed work orders and photos, and by answering disputes quickly.
7. Review the processing contract for early termination fees and automatic rate increases before signing.

Questions to ask before you switch processors

Switching processors can save money, but it also touches invoicing, field payments and customer card files. Get written answers to these questions first.

1. What will my effective rate be on my last three months of statements, with every fee included?
2. Is pricing interchange-plus, flat, tiered or subscription, and what is the markup on each card type?
3. What monthly, annual, PCI, gateway and chargeback fees apply, and which can be waived?
4. Is there a contract term, an early termination fee or an automatic rate increase clause?
5. Does it integrate with my field service and accounting software, or will the office reconcile payments by hand?
6. Can techs take tap and chip payments in the field, and what does the hardware cost?
7. Can stored customer cards for service plans be moved, and who owns those card tokens if I leave?
8. How quickly are funds deposited, and are deposits made per transaction or in daily batches?

Card-on-file customers are the hardest part of a switch. Ask the new processor how they will migrate stored cards before signing, or plan to collect new authorizations at each customer's next visit.

Surcharges, cash discounts and convenience fees

Some companies pass card costs to customers. There are three common approaches: a surcharge added to credit card payments, a cash or check discount, and a convenience fee for a non-standard payment channel. Each has its own rules from the card networks and from state law, and some states restrict or prohibit surcharging. Visa, for example, requires merchants to notify their acquirer 30 days before they begin surcharging^[2].

Before adding any fee, check your state's law, read your processor's rules, disclose it clearly at the point of sale and on the invoice, and consider how customers will react. Many owners find that offering ACH for large invoices and building normal processing costs into prices, as part of the annual pricing review, is simpler and better received than a visible surcharge.

Getting paid faster as well as cheaper

Processing cost is only part of the payment picture. Speed matters too: card payments usually settle in a day or two, while a check left on the counter can take a week to reach the bank. Almost every customer can pay from a phone: 91% of US adults own a smartphone^[4]. A payment link sent by text at the end of the job often gets paid the same day; our guide to text-to-pay and online invoices covers the setup.

For route-based businesses billing small recurring amounts, card-on-file billing is often worth its cost because it removes collection work entirely; see revenue per route for how fees affect route economics. For larger financing needs, such as equipment, compare the cost of carrying card balances with the options in our guide to SBA loans and equipment financing. And when you calculate pay plans that include commission on collected revenue, decide whether commission is paid on the amount before or after processing fees, a detail covered in payroll for field teams.