Stripe vs. Lemon Squeezy vs. Polar MoR Fee Showdown
Evaluate total cost of ownership between direct gateway processing (Stripe) and modern developer Merchants of Record (Lemon Squeezy and Polar.sh) across SaaS and digital downloads.
Live Calculation Workbench
Inputs execute client-side in browser memory with zero cloud transmission.
Deterministic calculations execute instantaneously in your browser. Use the share button in the application to generate reproducible state URLs for colleagues and audit reports.
Mathematical Formulas & Variable Breakdown
Standardized mathematical definitions and variable relationships utilized in this calculator:
MoRs charge higher processing cuts (4%-5%) but eliminate 100% of global VAT/GST registrations and sales tax filing software overhead.
Step-by-Step Worked Real-World Example
Scenario: Bootstrapped SaaS at $10,000/Month Revenue (200 Orders @ $50)
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1
Direct Stripe Gateway Cost($10,000 * 2.9%) + (200 * $0.30) = $350.00 Stripe Fees→ Result: + $50 Stripe Tax + $250/mo Tax Filing Service = $650 Total Cost
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2
Lemon Squeezy MoR Cost($10,000 * 5.0%) + (200 * $0.50) = $600.00 Flat→ Result: Zero additional sales tax filings or software required
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3
Polar.sh Developer MoR Cost($10,000 * 4.0%) + (200 * $0.40) = $480.00 Flat→ Result: Saves $120/mo over Lemon Squeezy and $170/mo over DIY Stripe
2026 Industry Benchmarks & Reference Schedule
Verified operating rates, thresholds, and performance tiers:
| Platform / Model | Base Fee Rate | Sales Tax / VAT Compliance | Chargeback Liability |
|---|---|---|---|
| Stripe Direct (Standard) | 2.9% + $0.30 | Seller responsible (+0.5% for Stripe Tax) | Seller liable ($15.00 fee) |
| Polar.sh (Developer MoR) | 4.0% + $0.40 | 100% Handled globally by Polar | Covered by Polar |
| Lemon Squeezy (MoR) | 5.0% + $0.50 | 100% Handled globally by Lemon | Covered by Lemon Squeezy |
| Gumroad (Legacy MoR) | 10.0% flat fee | 100% Handled by Gumroad | Covered by Gumroad |
Technical Implementation & Execution Standards
Executing deterministic calculations client-side ensures 100% operational privacy and instantaneous scenario evaluation. In production environments, parameter verification, fee reconciliation, and algorithmic calibration should adhere to modern digital standards.
Zero Data Leakage & Browser Sandbox
Unlike server-dependent cloud utilities, all arithmetic models execute locally within modern browser JavaScript memory registers. Proprietary business variables, customer acquisition metrics, and internal profit margins remain strictly private on the user device without network transit.
Stateless Scenario Permalinks
Shareable calculation states encode active variables directly into URL query parameters. This allows distributed media buying teams, growth marketers, and engineering leaders to collaborate, audit edge cases, and reproduce exact quantitative outcomes in real time.
Frequently Asked Questions
What is a Merchant of Record (MoR)?
A Merchant of Record is the legal entity that sells goods or services to the end customer. The MoR assumes full legal responsibility for collecting and remitting global sales tax, VAT, and GST, as well as handling chargebacks.
When should a startup switch from Lemon Squeezy or Polar to Stripe?
Typically around $50,000 to $100,000 in monthly recurring revenue (MRR). At that scale, the ~1%-2% fee delta justifies hiring dedicated tax accountants and licensing enterprise tax software like Avalara.
Does Polar.sh support GitHub sponsorships and digital software licenses?
Yes. Polar.sh is explicitly tailored for open-source developers, SaaS founders, and digital product creators with built-in GitHub integration.
Are there payout fees when withdrawing funds from an MoR?
Most MoRs process payouts via Stripe Connect or PayPal. Payout fees vary between $0 for local bank transfers and $1.50-$20 for international cross-border SWIFT transfers.
Is my revenue data tracked on SwiftKitHub?
No. All calculations run client-side in your browser with zero remote logging.