What is Payment Processor Fee Structures?
Mathematical Foundation
Laws & Principles
- Stripe standard rate: 2.9% + $0.30 per successful card charge (US). International cards add 1.5% surcharge.
- PayPal standard rate for card transactions: 3.49% + $0.49 (as of 2024 US rates). PayPal-to-PayPal transfers are free.
- Stripe does not charge a fee for refunds, but the original transaction fee ($0.30) is not returned. PayPal returns the flat fee on full refunds.
- For high-volume sellers (>$80K/month), both processors offer negotiated custom rates — default public rates are not final.
- ACH bank debit transactions cost significantly less: Stripe charges 0.8% (capped at $5), making it cost-effective for large B2B invoices.
Step-by-Step Example Walkthrough
" A seller processes a $150 product sale and wants to know their net payout from each processor. "
- Stripe: $150 × 0.029 = $4.35 + $0.30 = $4.65 total fee. Net payout: $145.35.
- PayPal (card): $150 × 0.0349 = $5.24 + $0.49 = $5.73 total fee. Net payout: $144.27.
- Stripe saves: $5.73 − $4.65 = $1.08 per transaction at this price point.