Know if a listing is worth scaling before ads or inventory.
Sellers need one clear answer: should this product get more budget, a better price, or a hard stop? GrowMargin calculates fees, returns, and ad spend to give you that answer.
Decide before you scale
Start with
One listing, one preset, manual costs.
See
Decision status + true net
Fix
Price floor + Basic fix checklist
Share
PDF (Basic+) · Email Insights (Pro)
Outcome
A seller can tell whether this SKU deserves more spend.
How GrowMargin helps you decide
Live profit analysis
Profit, margin, and fee breakdown update as you type. Change a price and see the margin move instantly.
- Profit per sale, updated instantly
- Decision status (Good to scale / Watch closely / Fix first)
- Full next-step fix checklist on Basic+
- Optional returns model for true net per order placed
- Price floor for target margins or break-even
- Full fee breakdown itemised line-by-line
Major channels
Payment processing · marketplace fee · shipping
Marketplace selling
Transaction fee · listing fee · payment processing
Fulfilment selling
Referral fee · fulfilment fee · ad spend
Estimated platform fees, fully adjustable
We pre-fill standard fees for common channels. Every fee field is editable so the calculations match your specific account tier and reality.
Saved analyses
Analysis 1
Marketplace
$11.40
28% margin
Analysis 2
Online store
$18.70
42% margin
Analysis 3
Fulfilment
$6.20
19% margin
Save scenarios and compare
Save an analysis, come back later, and compare listings side by side to see what price makes you the most profit.
Basic saves up to 10 analyses. Pro includes up to 25 saves.
Decision-memo PDF exports
Basic and Pro export a clean, decision-ready PDF summary with your verdict, full cost stack, fix checklist, and price floor.
- Decision-first memo, not a spreadsheet dump
- True net after returns when return rate is modeled
- Actionable checklist for what would fix weak margins
- Business name and branding displayed cleanly
For sellers ready to run ads
ROAS, ACOS & break-even ad limits
Know exactly how much return your ads must deliver before you start losing money.
- Break-even ROAS and ACOS calculated from real unit economics
- Maximum CPA target to maintain desired margin
- 30-day forecast models at scale
Email reports & Email Insights
Turn your profit analysis into a ready-to-send brief that you can copy or open in your email client.
- Copy Email Insights to clipboard in one tap
- Open draft pre-populated in your default email app
- Plain-language summaries partners and suppliers understand
Compare pricing scenarios side by side
Side-by-side metrics
Select two saved analyses and compare how price, platform, and cost differences impact your net bottom line.
- Compare different price points for the same SKU
- Compare same product across different marketplaces
- Evaluate suppliers and cost structure changes
Automated comparison insight
Pro gives you an instant plain-language breakdown of what changed and which scenario is more profitable.
- Clear verdict: improving, declining, or mixed
- Profit percentage shift and point-by-point margin change
- Specific recommendations based on your numbers
Multiple platforms. One tool.
Shopify & Custom
Payment processing, transaction fees, shipping, product cost, and marketing spend.
- • Payment gateway
- • Transaction fee
- • Shipping
- • Ad spend
Etsy
Listing fees, transaction fees, payment processing, and optional offsite ads.
- • Listing fee
- • Transaction fee
- • Payment processing
- • Shipping
Amazon FBA
Referral fees, FBA fulfilment fees, storage estimates, and PPC ad costs.
- • Referral fee
- • Fulfilment fee
- • Storage
- • Product cost
Custom Stores
Complete flexibility. Enter exact payment gateway and merchant rates to match your shop.
- • Custom rate
- • Gateway fee
- • Shipping
- • Custom expenses
Seller-first design principles
No subscriptions
Both plans are a single one-time payment. Pay once — we never charge you again.
No API connections needed
No store integrations. You enter the numbers; analyses stay private to your account.
Plain language
Every label, insight, and piece of guidance is written for real sellers, not accountants.
Web and iOS access
Use your account on desktop and iPhone with zero added fees.
Simple pricing for the decision tool.
Pick the plan that fits where you are today. You can upgrade later and only pay the difference.
Free
See the decision status. Upgrade when you want the fix.
- ✓Access to all analyses for any online store
- ✓Live profit + decision status (Good to scale / Watch closely / Fix first)
- ✓Teaser insight — full fix checklist on Basic
- ✓Returns & price floor numbers (apply + PDF on Basic)
- ✓Quick-start examples to try instantly
- ✓Save 1 analysis · 1 insight card
Basic
Decision memo for this listing — pay once.
- ✓Full reason + next-step fix checklist
- ✓Decision-memo PDF (verdict, costs, what to fix)
- ✓Full details popup for verdict & fix guidance
- ✓All beginner insights unrestricted
- ✓Save up to 10 analyses · compare any 2 side by side
- ✓Business name & logo on PDF exports · Currency settings
Pay once via PayPal or Card • Lifetime access
Pro
Scale with ads — ROAS, Email Insights, more saves.
- ✓Everything in Basic
- ✓Email Insights (copyable report you open in your email app)
- ✓Copy Email Insights for partners & suppliers
- ✓Break-even ROAS (return on ad spend) / ACOS (ad cost as a share of sales)
- ✓Compare with % change + which scenario wins
- ✓Save up to 25 analyses
Pay once via PayPal or Card • Lifetime access
Ready to know your real profit?
One-time payment from $15. No subscription. Takes minutes to set up.