For years, merchants had limited choices when it came to payment processing pricing. You either accepted the confusing, markup-heavy “bundled” rates offered by most processors, or you dealt with complex contracts full of hidden fees.
Today, two transparent pricing models have emerged: Zero-Fee Processing and Interchange-Plus pricing. Both eliminate hidden junk fees and confusing rate structures—but they work in very different ways.
Understanding Interchange: The Foundation
When a customer pays with a credit card, the card-issuing bank charges an interchange fee. This fee goes to the bank that issued the customer's card and is set by the card networks (Visa, Mastercard). It's non-negotiable and applies to every transaction.
Interchange rates vary based on card type, transaction method, and business type. A basic debit card might cost 0.05% + $0.22, while a premium rewards card might cost 2.70% + $0.10. Most fall between 1.50% and 2.90% plus $0.10 to $0.25 per transaction.
The key thing: interchange is a cost you pay no matter which processor you use. What varies is how your processor handles it and what they charge on top.
Interchange-Plus: Transparent Markup Model
With Interchange-Plus pricing, you pay the exact interchange rate for each transaction plus a small, fixed markup. That markup is the same on every transaction.
Example pricing structure: Interchange + 0.30% + $0.10
Transaction 1: $50 sale with debit card = $0.25 interchange + $0.25 markup = $0.50 total (1.0%)
Transaction 2: $50 sale with premium rewards card = $1.15 interchange + $0.25 markup = $1.40 total (2.8%)
Pros of Interchange-Plus
- Complete transparency: See exactly what interchange costs versus processor markup.
- Lowest possible cost: No hidden fees, just interchange at cost plus small fixed markup.
- Fair for all cards: Processor doesn't profit more from premium cards—same small markup on everything.
- Scales with growth: As sales increase, that flat per-transaction fee becomes a smaller percentage.
Who Should Choose Interchange-Plus?
- High-ticket businesses (average sale $100+)
- High-volume merchants processing $50,000+ monthly
- B2B businesses with corporate card payments
- Anyone who values complete transparency
Zero-Fee Processing: Customer Covers the Cost
With Zero-Fee Processing, your customers who pay with credit cards cover the processing fee at checkout. You receive your full sale amount with zero processing costs.
Example: A $100 purchase becomes $103.50 for credit card customers (3.5% service fee). You receive $100. The $3.50 covers your processing cost.
Cash or debit card customers pay the base price with no fee.
Pros of Zero-Fee
- Eliminate processing costs: Keep 100% of sale price on card transactions.
- Predictable deposits: Every $100 sale deposits $100 regardless of payment method.
- Protect margins: For thin-margin businesses, this 2-3% savings can be game-changing.
- Incentivize cash: Some customers pay cash to avoid the fee—saving you even more.
Who Should Choose Zero-Fee?
- Restaurants and bars (tight margins, high volume)
- Retail stores with lower-ticket items
- Service businesses (salons, repair, contracting)
- Startups and growing merchants watching margins closely
Real-World Cost Comparison
Let's compare using a retail boutique processing $50,000/month in card sales:
Traditional Bundled Pricing
2.9% + $0.30 per transaction (old-school)
- Monthly cost: $1,650
- Annual cost: $19,800
Interchange-Plus
Interchange + 0.30% + $0.10 (avg effective rate ~2.10% + $0.20)
- Monthly cost: $1,183
- Annual cost: $14,196
- Savings: $5,604/year
Zero-Fee Processing
Minimal software fee ($15/month)
- Monthly cost: $15
- Annual cost: $180
- Savings: $19,620/year
That's nearly $20,000 per year—often the difference between struggling and thriving.
Customer Perception & Zero-Fee
The most common concern: will customers object to the service fee?
Reality: Most understand and accept it. Customers encounter service fees on Ticketmaster, Airbnb, delivery apps, and parking meters constantly. They're used to it. When properly disclosed and explained, the vast majority accept Zero-Fee.
Many businesses that implement Zero-Fee report little to no pushback, especially when they frame it transparently: “We offer a cash discount to keep our base prices lower for everyone.”
Can You Switch Between Models?
Yes. With flexible processors like Proper Solutions, you're not locked into one model. Many merchants switch as their business evolves:
- Startup begins with Zero-Fee to eliminate costs, switches to Interchange-Plus when established
- Restaurant uses Zero-Fee during slow seasons, Interchange-Plus when volume is high
- Online business uses Interchange-Plus for e-commerce, Zero-Fee for in-person events
Making Your Decision
What are your profit margins?
Thin margins (15% or less)? Zero-Fee provides immediate relief. Healthy margins? Interchange-Plus aligns with customer experience goals.
What's your average transaction size?
Small-ticket items (under $20)? Zero-Fee makes sense. High-ticket (over $100)? Interchange-Plus keeps costs transparent.
How do your customers pay now?
Mostly cards? Zero-Fee saves you money without changing behavior. Mix of cash and cards? Zero-Fee incentivizes the cheapest payment method.
How important is customer perception?
Luxury/high-touch industry? Interchange-Plus might be better. Value-conscious customers? They'll appreciate Zero-Fee transparency.
The Bottom Line
Whether you choose Zero-Fee or Interchange-Plus, you're getting a fairer deal than traditional bundled pricing.
Both models eliminate hidden fees and ensure transparent pricing. The question isn't “Which is better?”—it's “Which is better for my specific business?”
At Proper Solutions, we review your processing statement, run the numbers for both models side by side, and help you choose what makes sense. No pressure, no hidden agenda—just transparent guidance.
And if your needs change down the road, switching between models is easy with no contracts or early termination fees.