Calculator
Credit Card Fee Calculator for Processing Costs
Estimate monthly and annual credit card processing fees using your sales, average ticket, and current rate.
Current monthly fees
$535
Current annual fees
$6,419
Effective rate
3.57%
Monthly transactions
333
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| Provider estimate | Model | Effective rate | Annual cost | Difference vs current |
|---|---|---|---|---|
PayPal POS PayPal POS in-person public rate Official rate source | Flat rate | 2.49% | $4,482 | $1,937 |
QuickBooks Payments QuickBooks card-reader standard rate Official rate source | Flat rate | 2.50% | $4,500 | $1,919 |
Stripe Stripe Terminal in-person domestic cards Official rate source | Flat rate | 2.81% | $5,060 | $1,359 |
Square Square Free in-person domestic cards Official rate source | Flat rate | 2.93% | $5,279 | $1,139 |
Public-rate example limitations
These rows use public domestic card rates for the selected channel, not a blended estimate or a provider recommendation. For mixed sales, calculate each channel separately. Stripe Terminal needs a compatible integration; software and hardware costs are not included. Interchange-plus and quote-based options are excluded because a processor markup is not a complete rate. Your real cost can vary by card mix, volume, hardware, software plan, risk review, and negotiated terms. QuickBooks account subscription costs are excluded. Rates checked October 14, 2026; verify current terms at the linked official sources.
Restaurant preset context: typical needs include tips, kitchen workflows, tables, offline mode.
How to Calculate Credit Card Processing Fees
A credit card fees calculator should account for three pieces: the percentage rate, the per-transaction fee, and fixed monthly fees. Average ticket size matters because smaller tickets make the cents-per-transaction fee a bigger part of the effective rate.
Monthly fee estimate
card sales x percentage rate + transactions x per-transaction fee + monthly fees
Effective rate
total monthly fees / monthly card sales
Example: if a business processes $15,000/month, averages $45 per ticket, pays 2.9% + $0.30, and has no fixed monthly fee, the estimate is about $535/month, or a 3.57% effective rate. Check it with the effective rate calculator, compare it with current average processing fee benchmarks , and review the POS system cost comparison, calculate current public Square processing fees, or the Helcim vs Square fee comparison.
What Does a 3.5% Credit Card Fee Cost?
A percentage-only 3.5% fee costs $3.50 per $100, $35 per $1,000, or $525 on $15,000 in card sales. If the provider also charges a fixed amount per transaction, add that separately. For example, 3.5% + $0.15 on 300 transactions and $15,000 in sales is $570, for a 3.80% effective rate before monthly fees.
Enter 3.5 as the current percentage above, then add the per-transaction and monthly fees from your statement. This distinguishes a true 3.5% total cost from a 3.5% headline rate that excludes other charges.
When to Use This Credit Card Fees Calculator
Retail counter checkout
Model card-present sales, average ticket size, and any monthly POS software fee before comparing Square, Shopify POS, Helcim, or another retail provider.
Salon deposits and saved cards
Separate in-person checkout from deposits, no-show charges, memberships, and card-on-file payments so the blended effective rate is not understated.
Invoice or online payments
Use a separate estimate for keyed, invoice, ecommerce, or online payments because card-not-present rates are often higher than in-person rates.
Credit card fee formula
These formulas turn a processor statement into a comparable monthly and annual cost estimate.
Monthly processing fees
Monthly card sales x percentage fee + transactions x per-transaction fee + monthly fixed fees
Effective processing rate
Total monthly processing fees / monthly card sales
Enter monthly card sales
Use card volume, not total revenue, if part of your sales are cash, ACH, or check.
Estimate transaction count
Average ticket size helps estimate how often the per-transaction fee applies.
Compare modeled costs
Use the provider table as a directional model, then verify current rates and terms.
Public Standard Rate Examples
These verified public examples cover different payment channels and are not a lowest-provider ranking. Match the channel to how you accept payments. They are not custom quotes and may not include software, hardware, chargebacks, international cards, or industry-specific fees.
| Provider estimate | Model | Percent | Per transaction | Monthly fee | Source |
|---|---|---|---|---|---|
| Square Free in-person domestic cards | Flat rate | 2.60% | $0.15 | $0 | Pricing page Verified 2026-10-14 |
| Stripe online card payments | Flat rate | 2.90% | $0.30 | $0 | Pricing page Verified 2026-10-14 |
| Stripe Terminal in-person domestic cards | Flat rate | 2.70% | $0.05 | $0 | Pricing page Verified 2026-10-14 |
| Square Free online or invoice domestic cards | Flat rate | 3.30% | $0.30 | $0 | Pricing page Verified 2026-10-14 |
| PayPal POS in-person public rate | Flat rate | 2.29% | $0.09 | $0 | Pricing page Verified 2026-10-14 |
| QuickBooks card-reader standard rate | Flat rate | 2.50% | $0.00 | $0 | Pricing page Verified 2026-10-14 |
For inventory-led retailAffiliate partner
Need more than a payment-rate comparison?
If retail inventory and store operations matter as much as processing cost, compare Zoho POS for checkout, purchasing, vendors, multi-outlet management, and reporting. Verify current regional pricing and payment integrations.
We may earn a commission. Check regional availability, pricing and supported processors. Affiliate disclosure · Compare total POS costs first
Compare provider pricing
Use the calculator result as a starting point, then verify current pricing and contract terms directly with each provider.
Helcim
Official provider link
- growing businesses
- in-person merchants
- lower-fee quotes
Square
Official provider link
- new businesses
- restaurants
- food trucks
Stripe
Official provider link
- online payments
- SaaS
- developer-led businesses
These buttons currently open official provider websites. Pricing can change; verify current rates, monthly fees, hardware costs, and contract terms before signing up.
Credit card fee calculator questions
How do I calculate credit card processing fees?
Estimate monthly fees by multiplying card sales by the percentage fee, adding per-transaction fees, and including monthly fixed fees. Divide monthly fees by monthly card sales to get the effective rate.
Why does average ticket size matter?
Per-transaction fees become more expensive when average tickets are small. A business with many $10 tickets can pay a higher effective rate than a business with fewer $100 tickets, even when the advertised percentage rate is the same.
Are these provider estimates guaranteed quotes?
No. They are educational estimates based on public pricing assumptions. Real costs can vary by negotiated pricing, card mix, keyed versus swiped transactions, chargebacks, hardware, software plans, and industry risk.
What should I do after using the calculator?
Compare your effective rate with at least two current provider quotes, ask which fees are included, and confirm whether the pricing model is flat-rate, interchange-plus, tiered, or subscription-based.
For more background, read the credit card processing fees guide and the methodology.