A payment processor is the company that moves card transactions from your customer’s bank to your business bank account, handling authorization, clearing, and settlement across the Visa, Mastercard, Discover, and American Express networks. Choosing one is the single decision that sets your processing costs for years, because most contracts auto-renew and most owners never re-read their statements. The wrong processor quietly adds 0.5% to 1.5% in padded markup on every sale, which on $40,000 a month in card volume is $200 to $600 of pure margin walking out the door.
ProTech Payments helps small businesses in Katy, Houston, and across Fort Bend County pick a processor based on the numbers, not the sales pitch. We start with a free statement analysis that reads your existing fees line by line and shows the true effective rate you pay, then map that against pricing models that actually reduce it. The point is a defensible decision: you should be able to say exactly why you chose a processor and what it costs you per transaction.
This guide walks through the mechanics of processing, the pricing models that matter, the contract terms that trap owners, and how to evaluate hardware, support, and risk for your specific vertical. Numbers and named entities throughout, because the difference between a good processor and a bad one is almost always quantifiable.
What a payment processor actually does
A card payment is not one transaction, it is a relay between four parties: the cardholder’s issuing bank, the card network (Visa or Mastercard), the merchant’s acquiring bank, and the processor that connects them. Understanding this chain explains why your fees are structured the way they are.
The authorization and settlement chain
When a customer taps a card, the processor sends the transaction to the network, which routes it to the issuing bank for approval. That approval check happens in under two seconds. Later, usually in a nightly batch, the processor submits captured transactions for clearing and settlement, and funds land in your account in one to two business days. The plumbing behind most US small-business accounts runs on platforms like Fiserv (formerly First Data), which processes a large share of US card volume.
Where each fee comes from
Your total cost has three layers. Interchange is the non-negotiable fee the issuing bank keeps, set by Visa and Mastercard, ranging roughly from 0.05% plus 22 cents on a regulated debit card under the Durbin Amendment up to 2.95% on premium rewards credit cards. Assessments are small network fees, about 0.13% to 0.15%. The third layer is the processor’s markup, and that is the only part you negotiate. If you want the full breakdown of layer one, read our explainer on interchange fees before you compare quotes.
A processor that hides interchange and quotes you a single blended rate is betting you will not do the math. The cost of accepting cards is mostly fixed; the variable is how much a processor adds on top.
Pricing models and how they affect cost
Three pricing models dominate the US market, and the gap between the cheapest and most expensive on identical volume is often 40% or more. Pick the model before you pick the vendor.
Interchange-plus, flat-rate, and tiered
Interchange-plus passes interchange straight through and adds a fixed markup, for example interchange plus 0.30% and 10 cents. It is the most transparent model and usually the cheapest for established businesses. Our interchange-plus pricing guide shows how to read it on a statement.
Flat-rate, used by Square and Stripe, charges one published rate such as 2.6% plus 10 cents in person, regardless of the underlying card. Simple, predictable, and fine for very low volume, but expensive once you process real money because you overpay on debit and regulated cards. See our Square fees explainer for where the model starts costing you.
Tiered pricing buckets transactions into qualified, mid-qualified, and non-qualified rates. It is the least transparent model and the one most likely to hide markup; avoid it unless every tier is disclosed in writing.
Cost comparison on real volume
The table below compares monthly cost for a business running $40,000 in card volume across 1,200 transactions, a typical Katy retailer or restaurant.
| Pricing model | Example rate | Est. monthly cost | Notes |
|---|---|---|---|
| Flat-rate (Square) | 2.6% + 10c | $1,160 | No interchange savings on debit |
| Tiered | 1.79% / 2.49% / 3.29% | $980 to $1,250 | Real cost depends on tier mix |
| Interchange-plus | IC + 0.30% + 10c | $880 to $950 | Most transparent, lowest typical |
| Dual pricing | Posted cash/card price | Near $0 in fees | Card cost offset at point of sale |
Dual pricing and cash discount programs change the equation entirely by passing the card cost to the customer who chooses to pay by card, which is legal in Texas when posted correctly. Our dual pricing and cash discount program pages explain how to deploy each one compliantly, and the dual pricing savings calculator shows your specific number.
The seven criteria for choosing a processor
Use these seven criteria as a scorecard. A processor that fails two or more of them is a future regret.
Pricing transparency and effective rate
Calculate your effective rate: total fees divided by total volume. If a processor will not show you interchange separately, that is your answer. A healthy effective rate for a card-present small business runs 1.8% to 2.4% on interchange-plus.
Hardware, software, and integrations
Confirm the processor supports the terminals and point-of-sale software you need, and whether the hardware is locked to that processor. Clover is the dominant small-business POS, but a Clover bought from one processor is often reprogrammed-locked, so ask about portability. ProTech offers point-of-sale systems plus in-store payments, mobile payments, and a payment gateway for online checkout, all on one account.
Settlement speed, support, and security
Ask how fast funds settle, whether support is local or an overseas call center, and what PCI DSS support is included. PCI compliance is mandatory for every business that touches card data, and a good processor helps you complete the annual self-assessment instead of charging a non-compliance fee. See our PCI compliance service and the PCI compliance for small business guide.
Matching a processor to your business type
The best processor for a restaurant is not the best for a law firm or a wholesaler. Match the account to how you actually take money.
Card-present retail and restaurants
High transaction counts and tipping push restaurants toward POS systems with tip adjustment and table management; see our best restaurant POS system breakdown and restaurant merchant services. Retailers need inventory and fast checkout, covered on our retail merchant services page.
Service, B2B, and recurring revenue
Service businesses that bill after the job (auto repair, home services, salons) often want a virtual terminal to key cards by phone, explained in our virtual terminal guide. B2B and wholesale firms move large invoices where ACH and eCheck processing beats card cost, and verticals like professional services and B2B wholesale need Level 2 and Level 3 data support to earn lower interchange.
High-risk and specialized accounts
Some businesses (CBD, firearms, subscription billing with high chargebacks) are flagged high-risk and need a processor that underwrites them instead of freezing funds. Our high-risk merchant accounts page covers that path.
Contract terms and fees that trap owners
The rate is only half the deal. The contract is where processors recover what they discounted on the headline number.
Junk fees, lock-in, and equipment leases
| Fee or term | Typical cost | What to demand |
|---|---|---|
| Early termination fee | $295 to $595 | Month-to-month, no ETF |
| Equipment lease | $40 to $90/mo for 48 mo | Buy hardware outright |
| PCI non-compliance fee | $20 to $40/mo | Included PCI support |
| Monthly minimum | $25/mo | Waived or low |
| Statement / batch fees | $5 to $15/mo | Disclosed and capped |
A 48-month terminal lease on a $400 device can cost over $2,000, a classic trap. Buy the hardware or use equipment financing with a clear payoff instead of an open-ended lease.
Reserves, chargebacks, and reading the fine print
Check whether the processor holds a rolling reserve and how chargebacks are handled. Disputes cost you the sale plus a $15 to $25 fee per chargeback, so chargeback management tools that fight illegitimate disputes pay for themselves. Understanding the EMV liability shift matters here, where card-present fraud on a non-chip transaction falls on the merchant.
Common mistakes when switching processors
Switching is straightforward when you avoid the predictable errors.
Chasing the teaser rate
The lowest advertised rate is usually the qualified tier on a tiered plan, a number you will rarely hit. Compare effective rates, not teaser rates, and get every fee in writing before you sign.
Ignoring the cancellation timeline and downtime
Confirm your current contract’s termination terms before switching, and schedule the cutover so terminals and gateway are configured before you cancel the old account. Reprint your PCI scope and re-tokenize stored cards so recurring billing does not break.
Leaving savings programs on the table
Many Texas owners qualify for dual pricing or a surcharge program and never ask. Run the Texas surcharge calculator and the credit card processing fee calculator to see what each model returns before you commit.
Choosing a processor in Katy and Houston
Local matters more than owners expect. A Katy or Houston business benefits from a processor that answers the phone in your time zone, knows Texas surcharge law, and can put a technician in front of your terminal.
ProTech Payments is based at 25140 Kingsland Blvd STE 180 in Katy, Texas, serving Fort Bend County and the greater Houston metro. We support businesses with local pages for merchant services in Katy, Houston, Sugar Land, Cypress, Richmond, and Pearland. Texas allows credit card surcharging when it is posted at entry and the register, and our merchant services team sets it up to the letter of the rule.
Beyond rate, local processors fund faster and resolve hardware failures same-day, which matters when a terminal goes down on a Saturday lunch rush and an overseas support queue does not.
Frequently asked questions
What is the most important factor when choosing a payment processor?
The effective rate, which is total monthly fees divided by total card volume, matters more than any advertised number. A transparent interchange-plus quote and a month-to-month contract with no early termination fee beat a low teaser rate every time. Always confirm the processor discloses interchange separately.
Is flat-rate pricing like Square ever the right choice?
Yes, for very low or irregular volume, typically under $5,000 a month, where simplicity outweighs cost. Once you process steady volume, the flat 2.6% to 2.9% overcharges you on debit and regulated cards, and interchange-plus or dual pricing saves real money. Run your numbers on a fee calculator before deciding.
How long does it take to switch payment processors?
Most switches complete in three to seven business days, covering underwriting, hardware setup, and gateway configuration. The main delay is your current contract’s cancellation terms, so check for an early termination fee first. ProTech configures everything before you cancel the old account to avoid downtime.
What fees should I watch for in a processing contract?
Watch for early termination fees ($295 to $595), multi-year equipment leases, PCI non-compliance fees, monthly minimums, and undisclosed tiered markup. Demand month-to-month terms, buy hardware outright, and require PCI support to be included. Get the full fee schedule in writing before signing.
Do I need a high-risk merchant account?
Only if your industry is flagged for elevated chargeback or regulatory risk, such as CBD, firearms, nutraceuticals, or subscription billing with high refund rates. A high-risk account underwrites these businesses so funds are not frozen mid-cycle. Most standard retail, restaurant, and service businesses do not need one.
Can a Texas business legally charge customers a credit card fee?
Yes. Texas permits credit card surcharging and cash discount programs when the price difference is posted clearly at the entrance and point of sale and the surcharge does not exceed your cost of acceptance. Properly deployed dual pricing can reduce processing costs to near zero.
Talk to ProTech Payments
The fastest way to choose well is to start from your real numbers. Begin with a free statement analysis and we will show your true effective rate, the markup you are paying, and exactly how much an interchange-plus or dual pricing setup would save your business each month.
When you are ready to move, get started or contact our Katy team and we will configure your account, hardware, and savings program before you cancel anything.
