Credit Card Processing Fee Calculator
Estimate merchant credit card processing costs by average card payment, rate, fixed fee, and monthly card volume.
Use this credit card processing fee calculator when a processor quote, merchant statement, invoice tool, or checkout setup lists a percentage rate and fixed fee. It is focused on card-processing math for merchants rather than broad platform fees.
- Models a percentage plus fixed per-card-payment fee.
- Does not include chargebacks, PCI fees, statement fees, monthly minimums, hardware, or international-card add-ons.
Formula:(average card payment x processing percentage fee) + fixed fee, multiplied by monthly card payments.
Last reviewed:2026-05-23
Sources: Stripe US pricing, Square processing fees
When to use this
Calculate credit card processing costs for card payments, invoices, ecommerce checkout, and small business card acceptance.
What you get
A $100 card payment at 2.9% + $0.30 costs $3.20. At 250 card payments per month, processing fees are about $800.
Useful next step
Use the estimate to compare options, pressure-test pricing, or decide which fee model deserves a closer look.
Problems this helps with
- Need to compare processor quotes quickly
- Need to price card acceptance into invoices or checkout
- Need monthly cost from average ticket size and transaction count
Example estimate
A $100 card payment at 2.9% + $0.30 costs $3.20. At 250 card payments per month, processing fees are about $800.
Credit Card Processing Fee Calculator examples
Processor-specific inputs
Retail merchant
Use case: In-person card payments
Rate to enter: Use the card-present rate
Compare fixed fees for low-ticket sales.
Online store
Use case: Ecommerce checkout
Rate to enter: Use the online card rate
Start with 2.9% + $0.30 if you need a generic baseline.
Service business
Use case: Invoices and payment links
Rate to enter: Use invoice or keyed-payment rate
Model high-ticket invoices because the percentage fee dominates.
Subscription business
Use case: Recurring card billing
Rate to enter: Use card-not-present subscription rate
Test low monthly prices because fixed fees matter.
Sample calculations
$25 card sale
- Amount
- $25
- Rate
- 2.9% + $0.30
- Result
- $1.03 fee
Low-ticket businesses should watch fixed fees because they raise the effective rate.
$100 card payment
- Amount
- $100
- Rate
- 2.9% + $0.30
- Result
- $3.20 fee
Default example for credit card processing fee calculator searches.
$500 service invoice
- Amount
- $500
- Rate
- 2.9% + $0.30
- Result
- $14.80 fee
Useful for service businesses deciding whether to absorb or pass through card fees.
Monthly card volume
- Amount
- $100 x 250 payments
- Rate
- 2.9% + $0.30
- Result
- $800 monthly fee
Shows the real cost of card acceptance across monthly volume.
Fee table
| Scenario | Example input | Estimated fee | What to compare |
|---|---|---|---|
| In-person card sale | $50 at 2.6% + $0.10 | $1.40 | Card-present quote, POS fees, hardware |
| Online card payment | $100 at 2.9% + $0.30 | $3.20 | Card-not-present rate and fixed fee |
| Keyed invoice payment | $500 at 3.4% + $0.30 | $17.30 | Higher keyed or invoice rate |
| High-ticket payment | $2,500 at 2.7% + $0.15 | $67.65 | Percentage rate savings |
These examples are planning estimates. Use your actual processor quote or merchant statement for the final rate and fixed fee.
Compare processing options
Continue with a related tool or comparison that helps turn the estimate into a clearer decision.
Related fee calculators
FAQ
How do I calculate credit card processing fees?
Multiply the card payment amount by the processing percentage fee, add the fixed fee, then multiply by monthly card payment count for a monthly estimate.
What is a credit card processing fee?
It is the cost a business pays to accept a credit card payment, usually a percentage of the sale plus a fixed per-payment fee.
Is this different from the credit card fee calculator?
This page is focused on merchant processing cost. The main credit card fee calculator also covers surcharge-style examples and broader card fee searches.
Why is my effective rate higher on small payments?
The fixed fee is spread over a smaller sale. A $0.30 fee is 3% of a $10 payment but only 0.3% of a $100 payment.
Does this include monthly processor fees?
No. Add monthly software, PCI, statement, hardware, and minimum fees separately when comparing processor quotes.