Credit Card Fee Calculator
Estimate card fees in seconds and see how rate, fixed fee, and volume change your monthly cost.
Use this calculator to model credit card fees for retail, services, ecommerce, invoices, and other card-not-present payments.
- Uses a simple percentage plus fixed-fee model.
- Does not include chargebacks, PCI fees, monthly minimums, or hardware leases.
Formula:(transaction amount x percentage fee) + fixed fee, multiplied by monthly transactions.
Last reviewed:2026-05-17
Sources: Stripe US pricing, Square processing fees
When to use this
Estimate card processing costs before choosing a processor.
What you get
A $100 transaction at 2.9% + $0.30 costs $3.20. At 250 transactions per month, that is about $800 in fees.
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
- Hard-to-compare blended processing rates
- Fixed fees that punish low-ticket orders
- Monthly volume surprises
Example estimate
A $100 transaction at 2.9% + $0.30 costs $3.20. At 250 transactions per month, that is about $800 in fees.
Credit Card Fee Calculator examples
Processor-specific inputs
Stripe
Use case: Online card payments, invoices, SaaS billing
Rate to enter: Use your current Stripe card rate
Try 2.9% + $0.30 for a basic online estimate.
Square
Use case: Retail, mobile POS, small service businesses
Rate to enter: Use the rate for keyed, online, or in-person payments
Compare a lower in-person rate against online card entry.
PayPal
Use case: Checkout buttons, invoices, creator payments
Rate to enter: Use the PayPal rate for your transaction type
Model both percentage fee and fixed fee by order size.
Shopify Payments
Use case: Ecommerce stores comparing payment costs
Rate to enter: Use your Shopify plan's card rate
Pair this with the Shopify fees calculator for plan-level costs.
Sample calculations
$25 low-ticket sale
- Amount
- $25
- Rate
- 2.9% + $0.30
- Result
- $1.03 fee
Effective fee is about 4.1%, so fixed fees matter more on small orders.
$100 card payment
- Amount
- $100
- Rate
- 2.9% + $0.30
- Result
- $3.20 fee
Useful default for credit card processing fee calculator searches.
$1,000 invoice payment
- Amount
- $1,000
- Rate
- 2.9% + $0.30
- Result
- $29.30 fee
Percentage rate dominates as transaction size increases.
3.5% credit card fee
- Amount
- $100
- Rate
- 3.5% + $0.00
- Result
- $3.50 fee
Useful for searches like 3.5 credit card fee calculator when a business wants to model a simple surcharge-style percentage.
Fee table
| Scenario | Example input | Estimated fee | Why it matters |
|---|---|---|---|
| Retail card sale | $50 at 2.6% + $0.10 | $1.40 | Good for in-person merchant fee estimates. |
| Online checkout | $100 at 2.9% + $0.30 | $3.20 | Common model for card-not-present payments. |
| Invoice payment | $500 at 3.4% + $0.30 | $17.30 | Helps price card acceptance for service businesses. |
| High-ticket payment | $2,500 at 2.7% + $0.15 | $67.65 | Shows the savings impact of a lower percentage rate. |
These are example calculations, not live processor quotes. Enter your processor's current percentage and fixed fee for a more useful estimate.
Compare processing options
Continue with a related tool or comparison that helps turn the estimate into a clearer decision.
Related fee tools
FAQ
What is a typical credit card processing fee?
Many small businesses see percentage fees around 2% to 3.5% plus a fixed per-transaction fee, but the actual cost depends on processor, card type, and payment method.
How do I calculate credit card processing fees?
Multiply the transaction amount by the percentage fee, add the fixed per-transaction fee, then multiply by the number of payments if you want a monthly estimate.
How do I manually calculate credit card processing fees?
Use this formula: transaction amount x percentage rate + fixed fee. For a $100 payment at 3.5% with no fixed fee, the fee is $100 x 0.035 = $3.50.
How much are card processing fees on a $100 payment?
At 2.9% + $0.30, a $100 card payment costs $3.20 in processing fees before chargebacks, monthly fees, or hardware costs.
Is a credit card surcharge the same as a processing fee?
No. A processing fee is what the business pays the processor. A surcharge is a separate fee a business may add to a card payment to offset some of that cost, subject to card-network rules and local requirements.
What is the average credit card processing fee for a small business?
A simple planning range is about 2% to 3.5% plus a fixed fee, but card-present, online, keyed, rewards card, and processor pricing can all change the final cost.
How do Stripe, Square, PayPal, and Shopify Payments fees compare?
They can use different rates by payment type, plan, and country. Use this calculator with each provider's current percentage and fixed fee to compare the effective cost for your order size.
Why does the fixed fee matter?
A fixed fee has a bigger impact on smaller transactions. A $0.30 fee is only 0.3% of a $100 sale, but it is 3% of a $10 sale.
Can this replace a processor quote?
No. Use it to estimate and compare scenarios, then confirm final pricing with the processor.