# ProCalcGrid

> Free, real-time payment fee calculators and comprehensive e-commerce financial knowledge hub for Stripe, PayPal, Etsy, Shopify, and Square.

## Tools

- [Stripe Fee Calculator](https://procalcgrid.com/stripe-fee-calculator/): Calculate Stripe merchant transaction fees (2.9% + $0.30), international card surcharges (+1.0%), and reverse invoice amounts.
- [PayPal Fee Calculator](https://procalcgrid.com/paypal-fee-calculator/): Compare PayPal Business (Goods & Services, Invoicing, QR Codes) vs Personal Friends & Family fees.
- [Etsy Profit Calculator](https://procalcgrid.com/etsy-fee-calculator/): Calculate Etsy listing fees, 6.5% transaction fee, payment processing, Offsite Ads, and net seller profit margins.
- [Shopify Break-Even Calculator](https://procalcgrid.com/shopify-fee-calculator/): Compare Basic ($39/mo), Shopify ($105/mo), and Advanced ($399/mo) plans to find monthly break-even sales volume.
- [Square POS Fee Calculator](https://procalcgrid.com/square-fee-calculator/): Calculate in-person contactless swipe fees (2.6% + 10c), manually keyed-in cards (3.5% + 15c), and Square Online invoice rates.

## Knowledge Hub & Guides

- [All Guides & Knowledge Hub](https://procalcgrid.com/guides/): Comprehensive educational portal with verified 2026 fee schedules, formulas, and profitability analysis.
- [How to Calculate Reverse Stripe Invoices: The Exact Math to Guarantee 100% Net Payouts](https://procalcgrid.com/guides/stripe-reverse-invoice-formula-guide/): Charging clients extra without knowing the reverse billing formula still leaves you short on payouts. Discover the exact algebraic formula to ensure full net payments.
- [Stripe Cross-Border & Currency Conversion Surcharges: Hidden Fees Explained for 2026](https://procalcgrid.com/guides/stripe-international-currency-conversion-fees/): International cards and foreign exchange can quietly push Stripe fees from 2.9% to over 4.9%. Understand how cross-border charges work and how to legally avoid them.
- [Is Stripe Radar Worth the 5 Cents Fee? Cost-Benefit Breakdown for SaaS & E-Commerce](https://procalcgrid.com/guides/stripe-radar-fraud-protection-cost-analysis/): Stripe Radar costs 5 to 7 cents per transaction. At what monthly sales volume and fraud risk profile does it pay for itself? We break down the exact ROI mathematics.
- [Stripe Invoicing vs. Stripe Checkout: Which Feature Saves More on Processing Fees?](https://procalcgrid.com/guides/stripe-invoicing-vs-checkout-fees/): Stripe Invoicing charges up to 0.4% per paid invoice on top of processing fees. Is building a custom Stripe Checkout portal cheaper for your business model?
- [How to Prevent and Dispute Stripe Chargeback Fees ($15 Fee Mitigation Guide)](https://procalcgrid.com/guides/stripe-chargeback-dispute-fee-prevention/): A single chargeback loses you the merchandise, the revenue, and a $15 administrative fee. Discover how to construct dispute-proof transaction records.
- [Stripe Fee Comparison by Region: US vs. UK, EU, Canada, and Australia (2026 Schedule)](https://procalcgrid.com/guides/stripe-merchant-fees-us-uk-eu-comparison/): Did you know European merchants pay less than half the processing fees of US merchants? Understand regional interchange regulations and multi-country pricing.
- [PayPal Business vs. Personal Account: Tax Implications, Dispute Protection & Fee Differences](https://procalcgrid.com/guides/paypal-business-vs-personal-fees-taxes/): Should you run your business on a Personal PayPal account to save fees? We analyze IRS 1099-K compliance, seller protection, and exact fee schedules.
- [PayPal Invoicing vs. Standard Goods & Services: Breaking Down the 3.49% vs 2.99% Gap](https://procalcgrid.com/guides/paypal-invoicing-vs-goods-services-rates/): Sending a PayPal invoice costs 3.49% + $0.49 compared to 2.99% for standard checkout. At what volume should you switch to checkout buttons or alternatives?
- [How to Use PayPal QR Codes for In-Person Sales at 1.90% (Slashing POS Costs)](https://procalcgrid.com/guides/paypal-qr-code-fee-savings-guide/): In-person sellers can accept touchless payments via PayPal QR codes at just 1.90% + $0.10—beating Square and standard credit card readers by nearly 1%.
- [PayPal Microtransactions Tier: When Switching to 5% + $0.05 Saves You Thousands](https://procalcgrid.com/guides/paypal-microtransactions-fee-tier-optimization/): If your average order value is under $10, standard fixed fees ($0.49) can consume 20% of revenue. Learn when to activate PayPal's official Micropayments tier.
- [Avoiding PayPal International Surcharges: Complete Cross-Border Fee Mitigation Guide](https://procalcgrid.com/guides/paypal-international-cross-border-fees/): Cross-border fees on PayPal can push total deductions past 6.5%. Learn how international buyer fees and currency spreads operate in 2026.
- [Understanding PayPal Dispute and Chargeback Fees: How to Win Seller Claims](https://procalcgrid.com/guides/paypal-dispute-chargeback-seller-protection/): PayPal charges $15 to $20 for disputes. Learn how to qualify for Seller Protection on both physical and digital items to guarantee you keep your funds.
- [The Real Cost of Selling on Etsy in 2026: Why True Fees Total 11% to 15%, Not Just 6.5%](https://procalcgrid.com/guides/etsy-real-fee-breakdown-true-costs/): Etsy advertises a 6.5% transaction fee, but real shop deductions average 11% to 14%. We dissect every fee component with concrete mathematical examples.
- [Etsy Offsite Ads: Complete Profitability Calculation & How to Opt Out Legally](https://procalcgrid.com/guides/etsy-offsite-ads-opt-out-profit-impact/): When an Offsite Ad sale occurs, Etsy takes up to 15% on top of regular fees. Learn how attribution works and whether you qualify to turn it off.
- [Etsy COGS & Pricing Formula: How to Price Handmade Items to Protect 50%+ Margins](https://procalcgrid.com/guides/etsy-cogs-product-pricing-formula/): Pricing handmade goods by guessing or multiplying supplies by two leads to burnout. Use our proven retail formula to build resilient 50%+ net margins.
- [Etsy Listing Renewals vs. Multi-Quantity Fees: Hidden 20¢ Charges Demystified](https://procalcgrid.com/guides/etsy-listing-renewal-multi-quantity-fees/): Listing 10 items in a single listing still costs $2.00 in renewal fees. Discover how Etsy handles multi-quantity fee triggers and auto-renewals.
- [The Truth About Etsy Free Shipping Guarantee: Does Free Postage Actually Boost Profit?](https://procalcgrid.com/guides/etsy-free-shipping-guarantee-profit-analysis/): Etsy prioritizes shops offering free shipping on $35+ orders in search results. How do you bake shipping into prices without losing profit? We analyze the math.
- [Etsy Regulatory Operating Fees in the UK, EU & Canada: Local Surcharge Breakdown](https://procalcgrid.com/guides/etsy-regulatory-operating-fees-uk-eu/): Sellers in the UK and Europe face extra 'Regulatory Operating Fees' due to Digital Services Taxes. See the exact percentage deducted in each country.
- [Shopify Plan Break-Even Analysis: When Upgrading to Basic, Shopify, or Advanced Saves Money](https://procalcgrid.com/guides/shopify-plan-break-even-analysis-volume/): Paying more for higher Shopify subscription tiers actually lowers your total bill once you reach specific volume thresholds. We calculate the exact dollar inflection points.
- [The 2.0% Third-Party Gateway Penalty on Shopify: How to Eliminate Surcharges](https://procalcgrid.com/guides/shopify-third-party-gateway-fee-penalty/): Using external gateways on Shopify triggers an extra 2.0% platform penalty fee. Learn how Shopify Payments operates and how to legally bypass this charge.
- [Shopify Payments vs. Stripe Direct: Features, Chargebacks, and Hidden Fee Differences](https://procalcgrid.com/guides/shopify-payments-vs-stripe-direct/): Shopify Payments is powered by Stripe, but their terms, payout rules, and dispute handling are surprisingly different. Which gateway is superior for your business?
- [How Average Order Value (AOV) Affects Fixed Transaction Fee Erosion on Shopify](https://procalcgrid.com/guides/shopify-average-order-value-fee-erosion/): A 30-cent fixed fee consumes 3.0% of a $10 order, but only 0.3% of a $100 order. Learn how increasing Average Order Value (AOV) slashes your effective fee rate.
- [Annual vs. Monthly Shopify Billing: Cash Flow and 25% Discount ROI Calculation](https://procalcgrid.com/guides/shopify-annual-vs-monthly-subscription-roi/): Shopify offers a 25% discount when paying annually upfront. How does the cash commitment compare to investing that capital into inventory or ads?
- [Shopify Markets & Global Sales: Navigating Duties, FX Fees, and International Processing](https://procalcgrid.com/guides/shopify-markets-international-cross-border-fees/): Selling globally via Shopify Markets introduces duties, international card rates, and a 1.5% FX fee. Learn how to structure international pricing.
- [Square Tap vs. Keyed-In Card Fees: Why Manual Card Entry Costs Almost 1% More](https://procalcgrid.com/guides/square-in-person-vs-keyed-in-rate-comparison/): Typing card numbers manually into Square costs 3.5% + 15¢—almost a full percent higher than tapping. Discover why manual entry is so expensive and how to avoid it.
- [Square vs. Clover vs. Toast: Total Cost of Ownership Comparison for Small Businesses](https://procalcgrid.com/guides/square-vs-clover-vs-toast-cost-comparison/): Square charges zero monthly software fees on its base plan, while Clover and Toast lock you into monthly SaaS fees. Which point-of-sale system is cheaper overall?
- [Square Virtual Terminal and Invoicing: Fee Structure for Remote & B2B Billing](https://procalcgrid.com/guides/square-virtual-terminal-invoicing-fees/): Square charges two completely different rates for remote billing: 3.5% on Virtual Terminal vs 2.9% on Invoicing. Learn which tool to use to save 0.6% on every payment.
- [Square Offline Mode Processing: Risks, Best Practices, and Chargeback Exposure](https://procalcgrid.com/guides/square-offline-mode-processing-risks/): When outdoor markets lose cell signal, Square Offline Mode keeps lines moving. However, merchants bear 100% liability for any declined cards. Here is how to manage the risk.
- [How Credit Card Processing Fees Impact Customer Tips and Sales Tax on Square](https://procalcgrid.com/guides/square-tips-sales-tax-processing-deductions/): Credit card processors deduct their percentage from the final total—including sales tax and employee tips. We analyze the math and employer legal guidelines.
- [Square Hardware Costs vs. Long-Term Processing Fees: Reader vs. Stand vs. Terminal](https://procalcgrid.com/guides/square-hardware-roi-terminal-stand-reader/): Should you buy the $59 mobile reader, the $149 iPad stand, or the $299 dedicated terminal? We break down the hardware reliability and ROI for retail businesses.

## Information

- [About Us](https://procalcgrid.com/about/): Platform mission, privacy guarantee, and zero data storage client-side architecture.
- [Contact Support](https://procalcgrid.com/contact/): Support team contact and calculation assistance.
- [Privacy Policy](https://procalcgrid.com/privacy-policy/): Complete client-side privacy policy and data governance.
- [Terms of Service](https://procalcgrid.com/terms-of-service/): Terms of service and usage guidelines.
- [Financial Disclaimer](https://procalcgrid.com/disclaimer/): Independent financial estimation and trademark disclaimer.

## Optional

- [XML Sitemap](https://procalcgrid.com/sitemap.xml): Full machine-readable XML sitemap of all published calculator tools and educational guides.
- [Web App Manifest](https://procalcgrid.com/manifest.json): Web application manifest for progressive web apps and mobile agents.