Credit card processing fees are predictable once you understand the structure — but the payment industry has historically made that structure unnecessarily opaque. This guide breaks down every layer of fees you pay when accepting cards, and shows you exactly what you can and can’t negotiate.
Tired of fee surprises? ConvesioPay uses interchange++ pricing — every fee fully itemized on your statement. No blended rates, no hidden markups. See what you’d actually pay →
1. The Three-Layer Fee Structure
Every card transaction has three cost layers, whether your processor shows them to you or not:
| Layer | Who sets it | Negotiable? | Typical range |
|---|---|---|---|
| Interchange | Card networks (Visa, Mastercard) | No | 0.05% – 3.25% |
| Assessment / scheme fees | Card networks | No | 0.13% – 0.15% |
| Processor markup | Your payment processor | Yes | 0.10% – 0.50%+ flat fee |
The total you pay is the sum of all three. The only variable you actually control is the processor markup and only if you know it’s a separate line item.
2. Interchange Fees: The Largest Portion
Interchange is paid to the cardholder’s bank (the issuing bank) as compensation for the risk and cost of extending credit. Visa and Mastercard publish their interchange tables annually, they’re publicly available, though rarely referenced by merchants.
Interchange rates vary based on:
- Card type: Rewards and business cards carry higher interchange than standard debit or non-rewards credit cards
- Transaction environment: Card-present (in-person) transactions are lower risk and attract lower rates than card-not-present (CNP) / e-commerce transactions
- Merchant category code (MCC): Your business type determines which interchange tier applies to each transaction
- Transaction size: Some categories have tiered rates based on transaction amount
Common interchange ranges for WooCommerce merchants (card-not-present):
| Card type | Approximate interchange (CNP) |
|---|---|
| Consumer debit (US) | 0.05% + $0.22 (regulated) or ~1.15% (unregulated) |
| Consumer credit, non-rewards | 1.65% – 1.80% |
| Consumer credit, rewards | 1.95% – 2.30% |
| Premium / travel rewards | 2.30% – 2.70% |
| Business / commercial credit | 2.50% – 3.25% |
These rates are non-negotiable. Any processor claiming to “lower your interchange” is either misrepresenting what they do or helping you qualify for better interchange tiers through data optimization, which is legitimate and valuable, but different.
3. Assessment Fees: Small but Unavoidable
Assessment fees go to the card networks themselves (Visa, Mastercard, Discover, Amex) in exchange for network access. They’re a percentage of volume, typically 0.13% to 0.15% depending on network, plus various small per-transaction fees for things like cross-border transactions, international cards, and currency conversion.
You pay assessment fees on every transaction. They appear as pass-through costs on interchange++ statements but are often buried inside blended rates when processors don’t itemize them.
4. Processor Markup: What You Actually Negotiate
This is the processor’s revenue the only component you can negotiate or switch to get a better deal. It comes in several structures:
| Pricing model | How markup is charged | Best for |
|---|---|---|
| Flat rate | One blended % covers all costs (e.g., 2.9% + $0.30) | Low volume, simple operations |
| Tiered pricing | Transactions sorted into “qualified”, “mid-qualified”, “non-qualified” buckets | Nobody — this model benefits processors, not merchants |
| Interchange++ | Actual interchange + actual network fees + fixed markup (e.g., 0.20% + $0.10) | Growing merchants who want cost transparency |
| Subscription/membership | Monthly fee + near-zero markup, interchange passed through at cost | High volume merchants with consistent transaction mix |
For WooCommerce stores processing more than roughly $10,000/month, interchange++ almost always beats flat rate on total cost. ConvesioPay Q1 2026 data shows merchants switching from blended/flat-rate pricing to interchange++ save an average of 0.38% of processing volume, meaningful at any scale above a few thousand dollars per month.
5. Other Fees to Watch For
Beyond the core three-layer structure, you may encounter additional fees depending on your processor and contract:
| Fee | What it is | Avoidable? |
|---|---|---|
| Monthly/annual account fee | Standing charge for account access | Yes — many processors don’t charge this |
| PCI compliance fee | Annual charge for compliance attestation support | Sometimes — negotiate out of contracts |
| PCI non-compliance fee | Monthly penalty for not completing PCI SAQ | Yes — complete your SAQ |
| Chargeback fee | Per-chargeback charge, often $15–$35 | Reduce chargebacks; partially negotiable |
| Currency conversion fee | Applied when accepting cards in foreign currencies | Depends on processor; built into network fees |
| Early termination fee | Penalty for ending a multi-year contract early | Yes — avoid long-term contracts with ETFs |
| Retrieval request fee | Charge for responding to card issuer documentation requests | Reduce disputes; partially negotiable |
6. How to Calculate Your Effective Rate
Your effective rate is the single number that tells you your total processing cost as a percentage of volume:
Effective rate = Total processing fees ÷ Total processing volume × 100
Example: If you processed $50,000 last month and paid $1,375 in total fees, your effective rate is 2.75%.
Benchmarks by volume tier:
- Under $5K/month: 2.7%–3.2% is typical for flat-rate processors
- $5K–$50K/month: 2.2%–2.7% is achievable with interchange++ pricing
- $50K–$250K/month: 1.9%–2.3% is realistic with interchange++ and optimization
- Over $250K/month: Direct negotiations with processors can push below 1.8%
If your effective rate is significantly above these benchmarks for your volume tier, your pricing structure is worth reviewing.
7. Reducing Your Processing Costs
The most impactful actions for WooCommerce merchants:
- Switch to interchange++ pricing — the single highest-leverage change for merchants above ~$10K/month
- Optimize checkout for lower-interchange payment methods — debit and ACH carry lower interchange than premium credit cards
- Enable Apple Pay and Google Pay — express checkout methods show measurably lower decline rates (ConvesioPay Q1 2026 data: Apple Pay declines at less than half the rate of standard card entry)
- Submit transaction data completely — missing Level 2/Level 3 data fields on eligible B2B transactions can result in interchange downgrades
- Complete your PCI SAQ — eliminate non-compliance fees and reduce chargeback risk
- Reduce chargebacks — every chargeback costs a $15–$35 fee plus the disputed amount, and high chargeback rates can trigger processor penalties
8. What Transparent Pricing Looks Like
On an interchange++ statement, you should be able to see every fee as a separate line item, interchange by card type, assessment fees, and the processor markup clearly identified. If your statement shows a single blended percentage, you can’t verify what you’re actually paying in interchange versus markup.
ConvesioPay’s merchant dashboard shows interchange costs, scheme fees, and ConvesioPay’s markup as separate line items, so you always know what you’re paying and why. For more on how pricing models compare, see Interchange++ Pricing: Why Transparent Processing Saves You Money.
Get a fee comparison for your store. Share your current processing volume and we’ll show you exactly what you’d pay with ConvesioPay’s interchange++ pricing. Talk to our team →