Financial Calculator Tools
14 free calculators for merchants, freelancers, and creators. Calculate BNPL ROI, FX spreads, surcharges, payroll, MoR fees, and more — instantly, no sign-up required.
Payment Gateway Recommendation Engine
Multi-dimensional routing wizard. Input your country, AOV, volume, and model to discover your ideal payment stack, annual fee leakage savings, and multi-rail pipeline.
Stripe Statement Forensic Auditor
Drag & drop your Stripe balance CSV for a 100% private in-browser audit. Expose hidden cross-border surcharges, fixed fee erosion, and true take rate.
BNPL Merchant ROI Simulator
Calculate the true ROI of adding Klarna, Afterpay, or Affirm. Simulate AOV expansion (+30%) and conversion lift to find your breakeven point.
Contractor Payroll Calculator
Compare net take-home pay for W-2 employees vs 1099 contractors. Factor in self-employment tax, benefits, and overhead costs.
Creator Take-Home Calculator
Calculate your actual take-home from Patreon, Substack, Gumroad, and other creator platforms after all fees and payment processing costs.
Creator Tax Write-Off Calculator
Estimate deductible business expenses for content creators — equipment, subscriptions, home office, and platform fees.
Cross-Border FX Hidden Spread Calculator
Uncover hidden markups on currency conversion by PayPal, Stripe, and Wise. See the real cost of international transactions.
E-Commerce Profit Margin Waterfall
Visualize how revenue flows from gross sales to net profit — layering COGS, platform fees, payment fees, shipping, and marketing costs.
Freelancer Payout Calculator
Model your net payout across Upwork, Fiverr, Toptal, and Freelancer. Factor in platform service fees and payment withdrawal costs.
PDF Fee Receipt Generator
Generate professional PDF receipts that show itemized payment processing fees, net amount received, and tax breakdowns for any transaction.
POS Interchange vs Flat-Rate Calculator
Compare interchange-plus pricing (Helcim, Adyen) versus flat-rate processing (Square, Stripe) based on your actual card mix and volume.
Restaurant Surcharge Calculator
Calculate compliant credit card surcharge amounts for restaurants. Model pass-through fees under state surcharge laws and Visa/Mastercard rules.
Reverse Invoice Gross-Up Generator
Work backwards from a target net amount to calculate the gross invoice value that covers payment processing fees and tax withholdings.
SaaS MoR Fee Calculator
Compare Merchant of Record costs: Paddle vs Lemon Squeezy vs FastSpring. Factor in EU VAT handling, refunds, and chargebacks for global SaaS.
Shareable Fee Link Generator
Generate a shareable link pre-filled with your calculator settings — send clients a transparent breakdown of your payment processing fees.
Upwork Connects ROI Calculator
Calculate your true cost-per-bid and ROI on Upwork Connects. Measure success rate, hourly rate, and net earnings against connect spend.
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Frequently Asked Questions
Are these financial tools completely free?
Yes, 100% free with no sign-up, no email capture, and no subscription required. All calculations run entirely in your browser.
How accurate are the calculator results?
All tools are updated with published 2026 fee schedules from Stripe, PayPal, Wise, Klarna, Paddle, and other major platforms, including fixed per-transaction fees and variable percentage cuts.
Is my data private when using these tools?
Yes. Every tool runs 100% client-side in your browser. No financial data, transaction figures, or uploaded CSV files are ever sent to our servers.
Can I embed these calculators on my own website?
Yes! Look for the Embed button on our calculator pages, or generate a shareable fee link with pre-filled parameters to share with clients.