Most Shopify stores lose margin in the same three places: payment fees nobody has revisited since launch, ad spend judged on ROAS instead of contribution, and a stack of small app subscriptions. The guides and calculators below cover each one with worked numbers you can check yourself.
If you only do one thing: open your last Shopify bill. If there’s a third-party transaction fee and you can use Shopify Payments, start with Shopify transaction fees explained. Then work out your real break-even ROAS before you raise ad spend.
Payment and transaction fees
- Shopify Transaction Fees Explained (2026): What Shopify charges per order on each plan, and the 2% you pay for skipping Shopify Payments.
- Shopify Transaction Fee Calculator: Monthly card and third-party fees for your plan, AOV and order count.
- Shopify PayPal Fees vs Shopify Payments: PayPal plus Shopify’s third-party fee vs Shopify Payments on the same sales.
- Shopify PayPal vs Shopify Payments Fee Calculator: Side-by-side monthly fees for PayPal and Shopify Payments.
Profit, ads and break-even
- Shopify Profit Margin After Facebook Ads: Why a healthy ROAS can still mean thin profit once COGS and fees are in.
- Shopify Profit After Fees & Ads Calculator: Net profit, margin and break-even ROAS after COGS, fees and ad spend.
- Shopify Break Even After Ads and Fees: Find the ROAS and CPA your store actually needs to make money.
- Shopify Break Even After Ads Fees Calculator: Break-even ROAS, CPA and orders per month from your real costs.
- Shopify Conversion Rate Needed to Hit Profit Goal: Turn a monthly profit goal into the conversion rate you need.
- Shopify Conversion Rate for Profit Goal Calculator: Required conversion rate, orders and sessions for a profit goal.
Running costs: apps and shipping
- Shopify App Fees Eating Profit (Small Store): How a stack of $29 apps quietly eats a small store’s margin.
- Shopify Monthly App Cost Calculator: Your plan + app stack as a monthly, yearly and per-order cost.
- Shopify Shipping vs Free Shipping Margin Calculator: Charge for shipping or offer it free: margin per order for both.
Related
- Checkout Friction: Five Fixes: Five checkout fixes worth making before you scale ads.
Need a hand?
I’m Faraz, a Shopify and AI automation consultant. If you’d rather have someone go through these numbers on your own store, get in touch at farazhussain.com or WhatsApp +92 334 3454747. You can also browse all calculators.