Credit Card Fee Calculator
Calculate credit card processing fees by payment amount, percentage rate, fixed fee, monthly card volume, and exact card-fee rates like 2.99%, 3%, and 3.5%.
Use this credit card fee calculator when you need the fee on a card payment, invoice, checkout order, online payment, or surcharge-style estimate. Enter the amount, card fee rate, fixed fee, and payment count to see the per-payment fee, monthly cost, and effective card processing rate before comparing processors or changing prices.
- Uses a simple percentage plus fixed-fee model for credit card payments.
- Does not include chargebacks, PCI fees, monthly minimums, hardware leases, or card-network surcharge rules.
Formula:(transaction amount x percentage fee) + fixed fee, multiplied by monthly transactions.
Last reviewed:2026-05-31
Sources: Stripe US pricing, Square processing fees
When to use this
Calculate credit card processing fees before choosing a processor, adding a surcharge, pricing invoices, or comparing card payment options.
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
- Need to calculate credit card processing fees before setting prices
- Hard-to-compare blended processing rates from Stripe, Square, PayPal, or merchant accounts
- Fixed fees that punish low-ticket orders
- Monthly card volume surprises
- Need fast answers for exact-rate searches like 2.99%, 3%, or 3.5% credit card fees
- Need to decide whether to absorb fees, add a surcharge, or quote a different payment method
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.
2.99% credit card fee
- Amount
- $100
- Rate
- 2.99% + $0.00
- Result
- $2.99 fee
Targets exact-rate searches from merchants checking simple surcharge or pass-through math.
3% credit card fee
- Amount
- $100
- Rate
- 3.0% + $0.00
- Result
- $3.00 fee
Useful for searches like 3 percent fee calculator and quick card fee estimates.
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.
2.75% credit card fee
- Amount
- $100
- Rate
- 2.75% + $0.00
- Result
- $2.75 fee
Covers another common exact-rate search before users compare processors.
Merchant fee estimate
- Amount
- $2,000 monthly volume
- Rate
- 2.75% + $0.15 on 250 payments
- Result
- $92.50 monthly fee
Helps connect credit card fee searches to merchant fee calculator intent.
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. |
| 2.99% card fee | $100 at 2.99% + $0.00 | $2.99 | Matches exact-rate card fee calculator searches. |
| 3.5% card fee | $100 at 3.5% + $0.00 | $3.50 | Useful for surcharge-style percentage checks. |
| 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.
Browse payment fee calculators
Continue with a related tool or comparison that helps turn the estimate into a clearer decision.
Related fee calculators
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 calculate a 2.99% credit card fee?
Multiply the payment amount by 0.0299. For example, a $100 payment at 2.99% costs $2.99 before any fixed per-payment fee.
How do I calculate a 3% credit card fee?
Multiply the payment amount by 0.03. A $100 payment at 3% costs $3.00 before fixed fees, and a $500 payment costs $15.00.
Is a 3% credit card fee normal?
A 3% card fee is a common planning assumption for online, invoice, keyed, rewards-card, or surcharge-style estimates, but the real fee depends on processor, card type, payment method, and pricing model.
What is the 3% fee on $100?
The 3% fee on $100 is $3.00. If you need to receive $100 after a 3% percentage-only fee, the gross charge is about $103.09.
What is a 3.5% transaction fee?
A 3.5% transaction fee means the fee is 3.5% of the payment amount. On $100, the fee is $3.50; to receive $100 after a 3.5% percentage-only fee, charge about $103.63.
Which exact-rate credit card fee calculator should I use?
Use the exact-rate page when the quote names one rate, such as 2.99%, 3%, or 3.5%. Use this main calculator when you need to compare multiple rates, fixed fees, and monthly volume.
How do I know if I should pass credit card fees to customers?
First calculate the fee and monthly impact here. Then use the surcharge or reverse fee calculator to model pass-through math, and confirm processor, card-network, and local requirements before applying a surcharge.
What is the credit card fee on a $1,000 payment?
At 2.9% + $0.30, a $1,000 credit card payment costs $29.30. At 3% with no fixed fee, it costs $30.00.
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.
How do I calculate a 3% processing fee?
Multiply the payment amount by 0.03. A $100 payment has a $3.00 processing fee, and a $500 payment has a $15.00 processing fee before fixed fees.
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.
Should I use the credit card fee calculator or the payment processing fee calculator?
Use this page for card-specific fee math. Use the payment processing fee calculator when comparing broader payment methods such as payment links, invoices, ACH, subscriptions, or platform checkout fees.