Interchange-Plus vs. Flat-Rate vs. Tiered: Pricing Models Compared
Compare credit card processing pricing models side by side. See how interchange-plus, flat-rate, tiered and subscription pricing affect your monthly costs.
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On this page 9 sections
- The Four Common Credit Card Processing Pricing Models
- Interchange-Plus Pricing Explained
- Flat-Rate Processing and When It Wins
- Tiered Pricing and Its Hidden Costs
- Membership or Subscription Pricing for Merchant Accounts
- Side-by-Side Cost Example at Three Volumes
- Fees That Sit Outside the Pricing Model
- Which Model Fits Your Business
- Next Steps: Run Your Own Numbers
Key takeaways
- Every pricing model rests on the same wholesale card costs. The models differ only in how the processor packages its markup and how much of it you can see.
- Flat-rate pricing tends to win at very low volume. Interchange-plus and subscription pricing usually pull ahead as monthly sales grow.
- Tiered pricing is the hardest to audit because the processor decides which bucket each sale lands in.
- Compare quotes by effective rate (total fees divided by total sales) using your own statement, not the advertised headline rate.
Most business owners pick a processor based on a headline rate. That rate tells you very little until you know which credit card processing pricing model sits behind it. This guide explains the four common models: interchange-plus, flat-rate, tiered, and membership or subscription pricing. It then runs one illustrative month of sales through each model at three volumes. You'll see how the dollar difference changes as your business grows and how to repeat the math with your own statement.
The Four Common Credit Card Processing Pricing Models
Every card sale carries a wholesale cost. Most of that cost is interchange, which goes to the cardholder's bank. The rest is network fees charged by Visa, Mastercard, Discover and American Express. Processors cannot negotiate these costs away. Our guide to how interchange fees and card swipe costs are set walks through the mechanics.
The pricing model controls only how the processor adds its own markup on top of that wholesale cost:
| Model | How you're charged | How visible the markup is |
|---|---|---|
| Interchange-plus | Wholesale cost passed through, plus a fixed percentage and/or per-transaction markup | High: markup is a separate line |
| Flat-rate | One blended rate (often a percentage plus a per-transaction fee) for most cards | Low: wholesale cost and markup are combined |
| Tiered | Sales sorted into "qualified," "mid-qualified" and "non-qualified" buckets, each with its own rate | Low: processor decides the bucket |
| Membership/subscription | Wholesale cost passed through, plus a monthly fee and a small per-transaction fee | High: markup is mostly the fixed fee |
Interchange-Plus Pricing Explained
With interchange plus pricing, your statement shows the actual interchange and network fees for each card type. The processor's markup appears separately, usually as a percentage, a per-transaction fee or both. A monthly account fee may also apply.
The main advantage is transparency. Your markup stays the same whether a customer taps a basic debit card or a premium rewards card. Your total cost still moves with your card mix, because a rewards card costs more in wholesale fees than a debit card. The difference is that you can see why. You can also spot avoidable costs, such as interchange downgrades that make some sales cost more.
The trade-offs:
- Statements are longer and take some practice to read.
- Your total cost varies month to month with card mix, even when your markup doesn't.
- Very small merchants may pay more when a fixed monthly fee is spread over little volume.
For a deeper look at why established businesses often prefer this model, see why low-risk merchants should ask about interchange-plus pricing.
Flat-Rate Processing and When It Wins
Flat rate processing charges one blended rate for most transactions. Keyed-in or online sales sometimes carry a different flat rate. You know roughly what each sale will cost before you make it, and the statement is easy to read.
The processor sets the blended rate high enough to stay profitable on its most expensive cards. On cheaper transactions, such as many debit cards, you pay more than the wholesale cost would justify. That gap is the processor's margin, and you can't see it.
Flat-rate pricing tends to make sense when:
- Your monthly volume is low or highly seasonal.
- You value simplicity and predictable per-sale costs over the lowest possible total.
- You're just starting out and have no processing history to negotiate with.
It tends to cost more as volume grows, because the hidden margin scales with every dollar you process.
Tiered Pricing and Its Hidden Costs
Tiered pricing groups transactions into buckets. A "qualified" sale gets the lowest rate. This is often a swiped or dipped consumer debit card or basic credit card. Rewards cards, business cards, keyed-in sales and late batches may fall into "mid-qualified" or "non-qualified" buckets at higher rates.
The problem is that the processor defines the buckets, and definitions vary from one processor to the next. The advertised rate is usually the qualified rate, but many of your actual sales may land in the more expensive tiers. Each tier blends wholesale cost and markup together, so you can't easily tell how much you're paying above cost.
Watch for these warning signs on a tiered statement:
- A large share of volume showing up as mid- or non-qualified
- "Surcharge" or "downgrade" line items without explanation
- A qualified rate that looks low next to an effective rate that looks high
Membership or Subscription Pricing for Merchant Accounts
A subscription pricing merchant account passes wholesale costs through at cost, as interchange-plus does. Instead of a percentage markup, the processor charges a flat monthly membership fee plus a small per-transaction fee.
Because the markup is mostly fixed, it shrinks as a share of sales when volume rises. That makes subscription pricing attractive for steady, higher-volume businesses. It works poorly for very small or highly seasonal ones, because you still owe the full membership fee in a slow month.
Side-by-Side Cost Example at Three Volumes
The following example is entirely illustrative. The rates are made-up figures chosen to keep the arithmetic easy to follow. They are not quotes, not typical rates and not MannyPay pricing. Your real wholesale costs depend on your card mix, how you accept cards and your industry.
The Assumptions
- Average ticket: $50
- Three monthly volumes: $3,000 (60 sales), $40,000 (800 sales) and $150,000 (3,000 sales)
- Hypothetical blended wholesale cost: 2.00% + $0.10 per sale
- Interchange-plus: wholesale + 0.30% + $0.10 per sale + $15 monthly fee
- Flat-rate: 2.75% + $0.15 per sale, no monthly fee
- Tiered: 1.79% qualified, 2.69% mid-qualified, 3.49% non-qualified, + $0.20 per sale + $10 monthly fee, with volume split 50/30/20 across the tiers
- Subscription: wholesale + $0.08 per sale + $79 monthly fee
The Results
| Pricing model | $3,000/month | $40,000/month | $150,000/month |
|---|---|---|---|
| Hypothetical wholesale cost (built into every model) | $66.00 | $880.00 | $3,300.00 |
| Interchange-plus | $96.00 (3.20%) | $1,095.00 (2.74%) | $4,065.00 (2.71%) |
| Flat-rate | $91.50 (3.05%) | $1,220.00 (3.05%) | $4,575.00 (3.05%) |
| Tiered (50/30/20 mix) | $94.00 (3.13%) | $1,130.00 (2.83%) | $4,210.00 (2.81%) |
| Subscription | $149.80 (4.99%) | $1,023.00 (2.56%) | $3,619.00 (2.41%) |
The percentage in parentheses is the effective rate: total fees divided by total sales.
What the example shows:
- At $3,000 a month, flat-rate is cheapest and subscription is most expensive. The $79 membership fee alone is more than the entire month's $66 wholesale cost.
- At $40,000 a month, subscription pulls ahead. In this scenario, flat-rate costs $197 a month more than subscription, or $2,364 over a year.
- At $150,000 a month, the gap widens. Flat-rate costs $956 a month more than subscription and $510 more than interchange-plus. Over a year, that adds up to about $11,472 and $6,120.
With these made-up rates, flat-rate stops being the cheapest option at about $4,000 in monthly sales. That is where tiered, at the assumed 50/30/20 mix, overtakes it. Flat-rate also becomes more expensive than interchange-plus at roughly $4,300. Subscription overtakes interchange-plus at roughly $18,800.
Your break-even points will differ, but the pattern is common. Fixed fees hurt at low volume, and percentage markups hurt at high volume.
What Happens When the Tiered Mix Shifts
Tiered looks competitive above only because we assumed half of all volume qualified for the lowest rate. Now suppose the mix shifts to 30% qualified, 30% mid-qualified and 40% non-qualified. That could happen with more rewards cards, more keyed-in orders or a change in how the processor buckets sales.
The illustrative tiered cost rises to $1,266 (3.17%) at $40,000 and $4,720 (3.15%) at $150,000. Tiered is now more expensive than flat-rate, even though nothing about your business changed.
Fees That Sit Outside the Pricing Model
The pricing model is only part of your bill. Before comparing quotes, check for:
- Monthly statement, account or minimum-processing fees
- PCI compliance or non-compliance fees
- Gateway fees for online and virtual terminal sales
- Chargeback and retrieval fees
- Equipment leases
- Contract terms such as early termination fees on your merchant account
Two quotes with identical rates can produce very different totals once these fees are added. For more on comparing offers, see these questions to ask when choosing a payment processor.
Which Model Fits Your Business
Your industry shapes both your wholesale costs and which markup structure hurts least.
Retail Stores
Most retail sales are card-present chip or tap transactions. These generally carry lower wholesale costs than keyed-in sales. Shops with steady monthly volume often do well with interchange-plus or subscription pricing. Seasonal shops with a sharp holiday peak and slow months should model a slow month separately before committing to a fixed membership fee. MannyPay's retail payment processing solutions cover in-store hardware and acceptance.
Restaurants and Bars
Restaurants and bars see many small tickets, tip adjustments and evening or weekend batch timing. Small tickets make per-transaction fees heavier. At an illustrative $15 average ticket, a $0.10 per-sale fee alone works out to about 0.67% of each sale, so compare per-item fees closely. Bars with heavy late-night volume should also confirm when batches close, because late settlement can affect wholesale pricing. See our restaurant and bar payment options for setups built around tableside and counter service.
E-Commerce Stores
Online sales are card-not-present. They generally carry higher wholesale costs and more fraud exposure, as our breakdown of card-present vs. card-not-present fees and rules explains. Flat-rate online pricing is simple, but growing stores often benefit from seeing interchange directly. Remember to add payment gateway fees to any comparison. MannyPay supports online payment processing for e-commerce stores with gateway and shopping cart integrations.
Professional Services
Consultants, agencies and accounting or legal practices often have fewer, larger transactions. Many payments are keyed in rather than tapped. Many are also made with business or corporate cards, which can carry higher interchange. Percentage markups matter more than per-transaction fees here, and interchange-plus lets you see what those business cards actually cost. Explore payment processing for professional services firms for virtual terminal and card-not-present options. If you're also weighing payment options beyond cards, see our guide to which payment methods your business should accept.
A Different Approach: Cost Programs
Some merchants choose to offset card fees rather than only minimize them. They do this through cash discount, dual pricing or surcharging where permitted. MannyPay offers these programs along with zero cost processing programs for eligible merchants.
Disclosure rules, card network requirements and state laws vary. Read our comparison of cash discount, surcharging and dual pricing. Then confirm current requirements with your provider and a qualified professional before changing how you price.
Next Steps: Run Your Own Numbers
- Pull your last three processing statements.
- Add up total fees and total card sales for each month. Divide fees by sales to get your effective rate.
- Count your transactions and calculate your average ticket.
- Ask each provider to quote your actual volume, ticket size and card mix under the model they propose, including every monthly and annual fee.
- Compare effective rates and annual totals, not headline rates.
For more questions to ask during that process, see how to choose a merchant service provider. For a quote based on your own business, request a free MannyPay quote. A MannyPay specialist will respond within one business day.
This article is for general educational purposes and is not legal, tax or financial advice. Card network rules and state laws change; confirm current requirements for your business.
