What is Payment Processing?
Payment processing explained in plain English. Learn how transaction fees work, what happens behind the scenes when you get paid, and how to minimize costs as a freelancer.
What Is Payment Processing?
Payment processing is the complete system — involving multiple financial intermediaries — that handles the authorization, settlement, and transfer of funds from a customer's account to a merchant's account after a transaction is approved. It covers the entire lifecycle of a payment, from the moment a client enters their card details to the moment funds appear in your bank. While a payment gateway is the "front door" that captures card information and initiates the transaction, the payment processor is the actual engine that moves the money between banks. Most freelancers interact with payment processing through their choice of invoicing platform or payment gateway — Stripe, PayPal, and Square all handle both functions.
How Payment Processing Works: The Full Lifecycle
Understanding the full payment flow helps you see where your money goes and why fees exist at each step. 1. Authorization (0–2 seconds) When your client pays your invoice, the payment gateway sends encrypted card data to the processor. The processor routes it to the card network (Visa, Mastercard), which asks the issuing bank (the client's bank) to verify the card is valid and the account has sufficient funds. The issuing bank sends back an authorization code or decline. 2. Batching (end of day) Throughout the day, merchants accumulate authorized transactions. At day's end, the merchant "batches" them — grouping all transactions and sending them to the processor for settlement. Authorized-only transactions that aren't batched expire after 7 days and are never charged. 3. Settlement (1–3 days) The processor sends the batch to the card network, which requests funds from each issuing bank. Funds are transferred to the processor's bank, then deposited into the merchant's bank account. This is called the settlement — it's when the money actually arrives. 4. Funding Different processors fund on different schedules. Stripe typically funds next business day. Square can fund same day for eligible accounts. ACH transfers take 1–3 business days but have lower fees.
The Four-Party Model
Every credit card transaction involves four parties: | Party | Role | Who They Are | |---|---|---| | Cardholder | Buyer | Your client | | Issuer | Cardholder's bank | Issues and manages the client's card | | Acquirer | Merchant's bank/processor | Receives funds on merchant's behalf | | Card Network | Visa, Mastercard, Amex | Routes authorization between issuer and acquirer | The fee you pay (2.9% + $0.30 per transaction) is split roughly: - Card network: ~0.11% - Issuing bank: ~0.08% - Payment processor: ~0.50% - Payment gateway: ~0.10% - Plus the $0.30 per-transaction flat fee to the processor
How It Relates to Freelance Invoicing
When you send an invoice through Eonebill and your client pays with a credit card, payment processing is what makes the funds end up in your account. The fees come out of your invoice amount automatically — you receive $970 on a $1,000 invoice if the client pays by card. Key things freelancers should know about payment processing: - ACH is cheaper for large invoices — a $3,000 invoice paid via ACH might cost $15 in fees versus $87 via credit card - Failed transactions — sometimes a client's bank declines a charge; this happens more often with corporate/commercial cards - Chargebacks — clients can dispute charges months later; have clear contract terms and communication to protect yourself - Processing delays — funds may "pending" for 1–3 days before they clear to your bank
Example: Payment Processing on a $5,000 Invoice
Freelance consultant Dana sends a $5,000 invoice to a mid-size marketing agency. The agency pays via their corporate Mastercard. Stripe's payment gateway authorizes the charge in 2 seconds. The transaction batches at end of day. Settlement occurs the next business day — Stripe deposits $4,852.50 into Dana's bank account (after the 2.9% + $0.30 fee of $147.50). Dana could have saved $142.50 by requesting ACH payment (0.8% capped at $5 fee) — worth discussing with clients for large invoices.
Payment Processing vs. Payment Gateway
| | Payment Gateway | Payment Processor | |---|---|---| | Function | Captures and encrypts card data; initiates transactions | Moves actual funds between banks | | Analogy | The checkout counter where you hand over your card | The truck that delivers money between banks | | Examples | Stripe, Braintree | Stripe, Chase, First Data, FIS | | What you see | "Pay with Card" button on your invoice | Transaction fees on your bank statement | In practice, most modern payment platforms (Stripe, PayPal, Square) bundle both functions into a single integrated service — which is why the terms are often used interchangeably. Stop losing money to unnecessary processing fees. Start your free Eonebill trial and enable both card and ACH payment options so clients can pay the way that works best — and you save on fees. Want to learn more about getting paid faster? Read our guide to payment receipts and automating your payment follow-ups. View Pricing → | Glossary Home → | Home →