When a customer pays by credit card in your WooCommerce store, roughly half a second of network activity determines whether you get paid. That activity involves four parties, two card networks, and a fee structure most merchants pay without fully understanding.
This guide walks through the credit card transaction lifecycle step by step, from the moment a customer clicks “Place order” to when funds land in your account and explains how the fee structure at each stage affects your effective rate.
WooCommerce merchant? ConvesioPay is a certified Adyen partner offering interchange++ pricing, so you see exactly what you pay at every layer, not a blended rate. Get started →
1. Credit Cards vs. Debit Cards: Why the Distinction Matters
Credit and debit cards look identical at checkout, but they route through different networks and carry different interchange rates. Understanding the difference matters because your card mix — the proportion of credit vs. debit transactions — directly affects your processing costs.
| Factor | Credit Card | Debit Card |
|---|---|---|
| Funding source | Issuer extends credit to cardholder | Funds drawn directly from bank account |
| Interchange rate | Higher (1.5%–2.5%) | Lower (0.05%–1.0%) |
| Network routing | Visa/Mastercard credit rails | Visa/Mastercard debit or PIN debit networks |
| Chargeback rules | Standard dispute window (up to 120 days) | Shorter dispute windows in many cases |
According to ConvesioPay Q1 2026 data, the funding source mix across WooCommerce merchants on the network is approximately 41% credit, 36% debit, and 22% prepaid. Merchants with a higher credit card mix pay more in interchange, which is one reason interchange++ pricing (where you see the actual interchange rate per transaction) tends to outperform flat-rate pricing at volume.
2. The Four-Party Model
Every credit card transaction involves four core parties. (For a detailed breakdown, see What Is Payment Processing?)
- Cardholder — your customer, using a card issued by their bank
- Merchant — your WooCommerce store
- Issuing bank — the bank that issued the customer’s card (e.g., Chase, Capital One)
- Acquiring bank — the institution that holds your merchant funds (e.g., Adyen, Stripe)
The card network (Visa or Mastercard) sits in the middle, routing messages between the acquirer and issuer and setting the rules — including interchange rates — that both must follow.
3. The Credit Card Transaction Lifecycle
A complete credit card transaction has six distinct steps across two phases.
Phase 1: Authorization
- Initiation — the customer submits card details at checkout. Your gateway encrypts the data using TLS and tokenizes the card number so the raw PAN never touches your server.
- Routing — the encrypted request travels from your gateway to your processor, then through the card network to the issuing bank.
- Issuer evaluation — the issuing bank checks: available credit, card status (active/blocked/expired), fraud signals (velocity, geolocation, behavioral patterns), and any cardholder-set restrictions.
- Response — the issuer returns an approval code or a decline code. Common decline codes include insufficient funds (51), do not honor (05), and card not permitted (57). The response travels back through the same chain to your store in under a second.
Phase 2: Capture and Settlement
- Capture — you (or your processor automatically) request collection of the authorized funds. Most WooCommerce stores capture immediately at checkout. Merchants shipping physical goods sometimes delay capture until fulfillment.
- Settlement — your processor batches captured transactions and submits them to the acquirer. The acquirer sends the batch through the card network. Each issuing bank transfers the transaction amount minus interchange fees. Funds net of all fees arrive in your bank account within 1–2 business days.
4. What Happens When a Transaction Is Declined
Declines fall into two categories with very different implications for merchants:
| Decline type | Cause | Merchant action |
|---|---|---|
| Hard decline | Card blocked, fraudulent, or invalid | Do not retry — it will not succeed |
| Soft decline | Temporary issue: insufficient funds, bank system error, velocity limit | Can retry after a delay with intelligent logic |
Retry logic matters significantly for subscription merchants. Retrying a soft decline at the wrong time (immediately, or at peak fraud hours) can push a card into a hard decline or trigger fraud flags. Intelligent retry logic — built into processors like ConvesioPay — identifies the optimal retry window using machine learning, improving recovery rates on failed payments.
5. The Credit Card Fee Anatomy
Every credit card transaction generates fees for three different parties. Understanding each layer is the foundation for evaluating processor pricing.
Interchange Fee
Paid to the issuing bank. This is the largest component of processing costs and varies by:
- Card type (standard vs. rewards vs. corporate vs. purchasing)
- Transaction method (card-present vs. card-not-present)
- Merchant category code (MCC)
- Whether the transaction is authenticated (AVS match, CVV match, 3DS)
Visa and Mastercard publish their interchange tables publicly. A standard Visa credit card processed online typically carries 1.80% + $0.10. A Visa Signature Preferred rewards card carries 2.40% + $0.10. That 0.60% difference adds up significantly at volume — which is exactly why flat-rate pricing, which blends these into a single rate, tends to overcharge merchants with a premium card mix.
Assessment Fee
Paid to the card network (Visa, Mastercard). Smaller than interchange — typically 0.13%–0.15% — but non-negotiable and applied to every transaction regardless of card type.
Processor Markup
Paid to your payment processor / acquirer. This is the only component that varies by contract and is therefore the one worth negotiating. How it’s structured depends on your pricing model.
6. Why Rewards Cards Cost Merchants More
When a customer pays with a Visa Infinite or Mastercard World Elite card, the interchange rate is significantly higher than a standard card. The issuing bank uses this additional interchange revenue to fund the rewards program, cashback, airline miles, hotel points.
The merchant absorbs this cost. Under flat-rate pricing, you’d never notice: you pay the same 2.9% whether the customer used a basic debit card or a premium travel rewards card. Under interchange++ pricing, you see the actual interchange per transaction — and you can see the rewards card premium explicitly.
This transparency is one of the primary reasons high-volume merchants prefer interchange++ pricing. On a high-reward-card-mix business doing $500K/year, the difference between flat-rate and actual interchange can represent tens of thousands of dollars annually.
7. The Three Pricing Models Compared
| Model | How it works | Best for | Watch out for |
|---|---|---|---|
| Flat rate | Fixed % per transaction (e.g., 2.9% + $0.30) regardless of card type | Very low volume, simple operations | Overpaying on debit and low-interchange cards |
| Interchange++ | Actual interchange + assessment + fixed processor margin, stated separately | Merchants processing $50K+/month | Requires understanding your card mix to model costs |
| Tiered | Transactions bucketed into qualified / mid-qualified / non-qualified tiers | No one — this model exists to benefit processors | Nearly impossible to audit; most transactions fall into expensive tiers |
ConvesioPay uses interchange++ pricing — the same model used by Adyen for enterprise merchants. Merchants see the actual interchange cost per transaction, plus a fixed processor margin. There are no blended rates and no tier bucketing. For more on how interchange++ compares to flat-rate in practice, see Interchange++ Pricing: Why Transparent Processing Saves You Money.
8. How 3D Secure Affects Authorization Rates and Costs
3D Secure (3DS) adds a cardholder authentication step to online transactions. It has two significant effects on credit card processing economics:
- Liability shift — on fraud-coded chargebacks, liability moves from the merchant to the card issuer when 3DS authentication is completed. This is particularly valuable for merchants in higher-risk categories.
- Authorization rate improvement — authenticated transactions are viewed as lower risk by issuing banks. ConvesioPay Q1 2026 data shows 3DS delivers 62% fewer declines compared to non-authenticated transactions, and reduces chargeback rates by 81%.
ConvesioPay has 3DS active by default across all merchant accounts, not as a configuration project, but as a baseline that ships with the integration.
9. What WooCommerce Merchants Should Know
Understanding the credit card transaction lifecycle changes how you evaluate processors. The key questions to ask:
- What pricing model are you on — and can you see your actual interchange costs?
- Is 3DS enabled, and does it run frictionlessly (without adding a challenge step for low-risk transactions)?
- Does your processor support intelligent soft decline retries for subscription payments?
- What’s your card mix — and have you modeled what interchange++ would cost vs. your current flat rate?
ConvesioPay is built as a certified Adyen partner for WooCommerce merchants who need answers to all four questions. Interchange++ pricing, default 3DS, machine learning retry logic, and direct support from Convesio’s team, without the volume minimums or onboarding process of a direct Adyen account.
Based on anonymized, aggregated transaction data from ConvesioPay merchants processed in Q1 2026 (January 1 – March 31, 2026). No individual customer, card, store, or order data is included or identifiable.