Merchant Payments & MoR Deterministic Math Engine · 2026 Model

Merchant Gateway Fee & Net Take-Home Calculator

Calculate your exact net revenue and processing drag across Stripe, Lemon Squeezy, Paddle, and Shopify Payments factoring in interchange, international cross-border fees, currency conversion, and chargeback dispute reserves.

Scenarios:

1. Processing Volume & Ticket Size

$1,000Default $50,000$250,000
$5Median $45$500

2. Processing Rates & Surcharges

Stripe/Shopify: 2.9% · Lemon Squeezy/Paddle: 5.0%

3. Disputes, Fines & Platform Overhead

Visa/Mastercard excessive monitoring threshold is 0.90%–1.00%
Net Estimated Monthly Take-Home
$47,780.00
Effective Take-Home: 95.56% · Processing Drag: 4.44%
Gross Monthly Volume $50,000.00
↳ Estimated Transactions 1,111 tx
↳ Domestic Volume $37,500.00
↳ International Volume $12,500.00
Base Processing (MDR + Fixed) -$1,783.30
International Card Surcharge -$187.50
Currency Conversion / FX Fee -$125.00
Chargebacks & Fines Drag -$124.20
Monthly Gateway / Platform Fee $0.00
Total Processing Drag -$2,220.00
Mathematical Transparency

Calculation Formulas & Models

Every metric on FoxyData is deterministic, transparent, and auditable. Below are the algebraic definition and equivalent spreadsheet formula.

Algebraic Model
Net Take-Home = Gross Volume - (Gross Volume × MDR%) - (Transactions × Per-Tx Fee) - (International Volume × Cross-Border%) - (Foreign Volume × FX Spread%) - (Disputes × Dispute Fee) - Monthly Platform Fee

Evaluated client-side in floating-point arithmetic with strict zero-division and boundary guards.

Spreadsheet (Excel / Sheets)
= Gross - (Gross * P_mdr) - (ROUNDUP(Gross / Ticket, 0) * Fee_fixed) - (Gross * P_intl * P_xb) - (Gross * P_fx * P_fx_spread) - (ROUNDUP(Gross / Ticket, 0) * P_cb * Fee_dispute) - Fee_monthly

Drop-in formula for financial models, cost forecasting spreadsheets, and ERP analysis.

Knowledge Base

Frequently Asked Questions

Empirical engineering and financial explanations based on contractual rate sheets and production benchmarks.

What is the primary difference between a Payment Service Provider (PSP) and a Merchant of Record (MoR)? +

A PSP like Stripe acts as a payment facilitator: you maintain the legal merchant account, handle global sales tax/VAT compliance, and bear direct liability for fraud. An MoR like Lemon Squeezy or Paddle becomes the legal reseller of your digital products, automatically collecting and remitting global sales tax/VAT, managing chargebacks, and shielding you from foreign tax registration filings in exchange for a higher headline take-rate (typically 5% + $0.50).

How do international cross-border and FX fees impact merchant take-home margins? +

When an overseas customer purchases using a foreign-issued card, processors add an international interchange surcharge (typically 1.0% to 1.5%). Furthermore, if settlement occurs in a different currency, an FX spread fee (typically 1.0% to 2.0%) is deducted. On a $100 international sale, a nominal 2.9% fee easily expands to 5.4% in effective processing drag.

What chargeback threshold triggers penalty programs with Visa and Mastercard? +

Visa (VAMP) and Mastercard (VDMP) monitor dispute-to-transaction ratios. Crossing 0.90% to 1.00% dispute rate places a merchant into excessive chargeback monitoring programs, leading to mandatory dispute assessment fines of $50 to $100 per chargeback, mandatory remediation plans, and potential account termination.

Streamline Cross-Border B2B Payments & Invoicing Rails

Eliminate high merchant gateway take-rates and wire processing friction with verified ACH, digital checks, and direct multi-rail business disbursements.

Explore B2B Payment Rails →
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