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methodology.doc
storefront.engine • 18 GMV break-even models

E-commerce cost & plan break-even models

Model combined monthly subscription, card processing, external gateway, and marketplace referral fees from $1,000 to $150,000 in monthly store sales.

[+] shopify-plan-break-even.model [*]

Shopify Plan Upgrade Break-Even Calculator

Enter your monthly sales and average order value to see the exact point where lower credit card rates pay for the higher Shopify plan.

Baseline: $35,000/mo GMV open ↗
[+] shopify-third-party-gateway-fee-calculator.model [*]

Shopify Third-Party Gateway Penalty Calculator

Not eligible for Shopify Payments? See how the extra 2.0%, 1.0%, and 0.6% gateway fees drastically lower the plan upgrade break-even point.

Baseline: $12,000/mo GMV open ↗
[+] woocommerce-true-cost-calculator.model [*]

WooCommerce Total Ownership Cost Calculator

WooCommerce software is free, but hosting and card processing are not. Compare lean Hostinger vs Cloudways VPS setups against Shopify.

Baseline: $10,000/mo GMV open ↗
[+] etsy-seller-fee-calculator.model [*]

Etsy Seller Fee & Net Payout Calculator

See every cut Etsy takes on item price and shipping—and compare how much margin you keep by moving repeat buyers to your own store.

Baseline: $4,000/mo GMV open ↗
[+] bigcommerce-tier-calculator.model [*]

BigCommerce Plan & GMV Limit Calculator

BigCommerce charges 0% extra gateway fees but auto-upgrades your plan above $50k/yr and $180k/yr in trailing 12-month sales.

Baseline: $8,000/mo GMV open ↗
[+] amazon-fba-vs-shopify-margin-calculator.model [*]

Amazon FBA vs Direct Shopify Margin Calculator

Compare marketplace referral + fulfillment deductions against DTC credit card processing + subscription costs.

Baseline: $15,000/mo GMV open ↗
[+] shopify-cost-at-5k-monthly-sales.model [*]

Shopify Fees on $5,000 Monthly Revenue

Pre-loaded for $5,000/month stores: check whether Basic ($39) is still optimal and what your effective take-rate looks like.

Baseline: $5,000/mo GMV open ↗
[+] shopify-cost-at-10k-monthly-sales.model [*]

Shopify Fees on $10,000 Monthly Revenue

See exact processing + plan deductions at $10k MRR/GMV—and check if third-party gateways justify switching to Grow.

Baseline: $10,000/mo GMV open ↗
[+] shopify-cost-at-25k-monthly-sales.model [*]

Shopify Fees on $25,000 Monthly Revenue

Approaching the Basic-to-Grow crossover zone: test annual vs monthly Shopify billing at $25k/mo.

Baseline: $25,000/mo GMV open ↗
[+] shopify-cost-at-50k-monthly-sales.model [*]

Shopify Fees on $50,000 Monthly Revenue

Above $33k/mo, staying on Shopify Basic wastes money every month. Compare Grow vs Advanced at $50k GMV.

Baseline: $50,000/mo GMV open ↗
[+] shopify-cost-at-100k-monthly-sales.model [*]

Shopify Fees on $100,000 Monthly Revenue

Million-dollar run-rate check: see whether annual billing unlocks Shopify Advanced savings at $100k/mo.

Baseline: $100,000/mo GMV open ↗
[+] etsy-fees-on-50-dollar-sale.model [*]

How Much Does Etsy Take on a $50 Sale?

Instant item-level and monthly payout calculator pre-set for $50 average Etsy orders.

Baseline: $2,500/mo GMV open ↗
[+] etsy-fees-on-100-dollar-sale.model [*]

How Much Does Etsy Take on a $100 Sale?

Compare net seller payout on $100 handmade or vintage orders across Etsy Standard, Offsite Ads, and your own website.

Baseline: $5,000/mo GMV open ↗
[+] etsy-fees-with-offsite-ads.model [*]

Etsy Offsite Ads (12% vs 15%) Margin Calculator

Once you pass $10,000 in 12-month Etsy sales, Offsite Ads become mandatory at 12%. Model how attributed orders affect net profit.

Baseline: $6,000/mo GMV open ↗
[+] shopify-starter-vs-basic-break-even.model [*]

Shopify Starter ($5) vs Shopify Basic ($39) Calculator

Starter saves money when testing a new link-in-bio product, but its 5% transaction rate gets expensive fast.

Baseline: $2,000/mo GMV open ↗
[+] squarespace-commerce-fee-calculator.model [*]

Squarespace E-Commerce Fee & Upgrade Calculator

See how much the extra 3% Squarespace Business transaction fee costs on top of Stripe/PayPal processing.

Baseline: $1,500/mo GMV open ↗
[+] stan-store-vs-shopify-starter-calculator.model [*]

Stan Store vs Shopify Starter Fee Calculator

Calculate exact monthly creator revenue where Stan Store ($29/mo + 2.9% Stripe) beats Shopify Starter ($5/mo + 5% fee).

Baseline: $1,800/mo GMV open ↗
[+] wix-vs-shopify-fee-calculator.model [*]

Wix E-Commerce vs Shopify Total Fee Calculator

Model total monthly subscription and credit card fees across order volumes from $1,000 to $50,000/month.

Baseline: $6,000/mo GMV open ↗

Store platform comparisons

all_48_comparisons ↗