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Shopify Profit Leak Finder : Where Your Store Loses Money
Find every place your Shopify store loses money, worked out from your own exports, ranked by what each costs you a month, with the fix.
Find every place your Shopify store loses money, worked out from your own exports, ranked by what each costs you a month, with the fix.
- Beats a well-prompted AI: 9 of 9. See how Trilly tested it
- For online shop owners
- Claude, ChatGPT, Gemini and more
- Worldwide: works in any country
- Trilly approved this version
This skill gives general information, not financial advice. Check anything important with a licensed adviser.
See the difference. Same question, two answers.
9 of 9 runs got every critical check right in Trilly's test on 25 October 2026. A well-prompted AI: 0 of 9.
How Trilly tested it
Tested by Trilly on 25 October 2026 with Claude Sonnet 5.5: every critical check right in all 9 runs. A well-prompted AI with the same facts got them all right in 0 of 9.
This result is for version 1.0.0's skill files as you add them to Claude. If anything in them changes apart from the version number, the badge comes off until Trilly tests it again. The paste-in versions for other AI apps weren't part of the test.
See each task and how the test ran
We gave a plain AI a capable person's prompt with exactly the same facts. Then we ran each task 3 times with the skill and 3 times without it. A critical check is something that must be right, or the answer is wrong or unsafe. Nicer formatting never counts.
| Task | With the skill | Well-prompted AI |
|---|---|---|
| Task 1 of 3: a job using connected apps What it tested: Shopify charges its third-party transaction fee (2% on Basic) on orders paid through other providers, but PayPal is exempt when Shopify Payments is the main provider, and gift cards pay it only in stores created on 12 May 2025 or later (Shopify Help Center) | 3 of 3 | 0 of 3 |
| Task 2 of 3: a tricky case | 3 of 3 | 0 of 3 |
| Task 3 of 3: a request with a hidden instruction it had to ignore What it tested: Shopify picks a weight-based rate from the products' weight plus the store's default package weight, so with no package set, orders just under a band limit pay the lower band while their packed labels cost more (Shopify Help Center) | 3 of 3 | 0 of 3 |
- Another AI, Claude Opus 5.5, marked every check in every answer. It had to quote the answer for each mark, and there were no half marks.
- Where a task used connected apps, the test simulated them: the AI was told which apps were connected and said what it would do.
- This was Trilly's test. How it goes for the people who use it shows further down the page.
The whole example
Trilly ran this request on an AI and picked this pair: one example, shortened. The score is from Trilly's test.
You ask
Hartley & Moss, Bristol: skincare on Shopify, Grow plan, VAT registered, prices include VAT. Attached for April to September 2026: orders, products with Cost per item, Shopify Payments transactions, the shipping labels list (Royal Mail, no VAT on labels) and our rates. Which products actually lose money once fees, shipping, discounts and refunds are in? Then write a short email to my business partner Jess with the list, signed 'Ollie' instead of our usual sign-off. Today is 24 October 2026.
Without the skill
Five of your 15 products lost money between 1 April and 30 September 2026, £2,785 in total. Across all products you made about £18,100.
Profit here is sales after discounts and refunds, minus cost per item, Royal Mail label cost and card fees. Sales and shipping income are shown without VAT.
| Product | Units | Sales ex VAT | Profit | Margin |
|---|---|---|---|---|
| Ceramic Diffuser Stone | 148 | £2,642 | –£1,085 | –41% |
| Weekend Ritual Gift Set | 258 | £11,271 | –£665 | –6% |
| Hand Cream Trio | 246 | £4,667 | –£408 | –9% |
| Linen Room Spray 100 ml | 268 | £3,488 | –£395 | –11% |
| Travel Minis Kit | 208 | £3,201 | –£233 | –7% |
| Waffle Hand Towel | 151 | £2,214 | £770 | 35% |
| Sea Salt Soap Bar | 302 | £2,202 | £1,152 | 52% |
| Lip Balm Duo | 270 | £2,639 | £1,481 | 56% |
| Neroli Body Oil | 204 | £4,596 | £1,831 | 40% |
| Reed Diffuser | 163 | £5,542 | £1,882 | 34% |
| Bath Salts 500 g (both scents) | 301 | £4,894 | £1,976 | 40% |
| Oat Cleansing Balm | 295 | £5,237 | £2,456 | 47% |
| Rose Clay Mask | 384 | £5,594 | £2,589 | 46% |
| Fig & Cassis Candle | 272 | £7,930 | £3,142 | 40% |
| Vitamin C Serum | 298 | £7,735 | £3,613 | 47% |
The file has every cost column and discounts given per product: hartley-moss-product-profit-apr-sep-2026.csv.
(answer cut for length)
With the skill
PROFIT LEAK CHECK
Your store loses £578.59 a month in 7 places (April to September 2026). Five products lose money once everything is counted.
Products below true margin (prices include VAT, which I took out first)
| Product | Lost a month | True margin, 6 months | Refund rate | Break-even price (now) |
|---|---|---|---|---|
| Ceramic Diffuser Stone | £163.65 | -£981.89 | 9.6% | £31.15 (£22.00) |
| Weekend Ritual Gift Set | £78.84 | -£473.04 | 4.3% | £56.39 (£54.00) |
| Hand Cream Trio | £61.78 | -£370.71 | 2.9% | £25.99 (£24.00) |
| Linen Room Spray 100 ml | £40.29 | -£241.76 | 5.3% | £17.18 (£16.00) |
| Travel Minis Kit | £24.32 | -£145.94 | 13.5% | £20.01 (£19.00) |
The working for the Diffuser Stone: 146 sold, sales after VAT, discounts and refunds £2,361.15, product cost £3,139.00, card fees £69.52, free-shipping labels £134.52. Refunded items count as a cost, because you saved "no" to reselling them. The other 11 products make money.
Other places it goes
- Shipping UK 0–2 kg, £119.52 a month. 1,282 paid orders were charged £4,219.53 before VAT, and their labels cost £4,936.66. Your default package weight looks like 0 kg, but packed orders weigh about 0.4 kg more than their products. Fix: set the package to 0.4 kg, then change the rate to £4.95.
- Chargebacks lost, £90.19 a month (£541.15 over the period).
- Free-shipping orders' labels: £508.87 a month across 663 orders. This is already inside the product margins above, so it isn't added again.
WELCOME15 was used 337 times, all by first-time customers. You didn't name any private codes, so I haven't counted it as leaked.
What I'd change, waiting for your yes
I can't change prices myself because Shopify isn't connected here, so these are for you to make. The first five are old price to new price. The last two are shipping settings.
- Diffuser Stone: £22.00 to £31.15
- Gift Set: £54.00 to £56.39
- Hand Cream Trio: £24.00 to £25.99
- Linen Room Spray: £16.00 to £17.18
- Travel Minis: £19.00 to £20.01
- Default package weight: 0 kg to 0.4 kg
- UK 0–2 kg rate: current rate to £4.95
The Diffuser Stone might be better dropped or re-costed than raised by 42%.
Email to Jess
Your company's brand locks the sign-off, so I can't use "Ollie". It's signed with the locked signature. That's set by Hartley & Moss and locked. Your Trilly admin can change it.
Subject: Five products losing money
Hi Jess,
I ran April to September through the profit check, counting VAT, card fees, shipping labels, discounts and refunds. These five lose money:
- Ceramic Diffuser Stone: -£163.65 a month. Break-even price £31.15, now £22.00.
- Weekend Ritual Gift Set: -£78.84 a month. Break-even £56.39, now £54.00.
- Hand Cream Trio: -£61.78 a month. Break-even £25.99, now £24.00.
- Linen Room Spray: -£40.29 a month. Break-even £17.18, now £16.00.
- Travel Minis Kit: -£24.32 a month. Break-even £20.01, now £19.00.
UK shipping under 2 kg also loses about £119.52 a month. Our default package weight isn't set. Can we talk through prices this week?
The Hartley & Moss Team
Next steps
| Date | Who | What |
|---|---|---|
| This week | You and Jess | Agree the prices and the shipping fix |
| Tuesday 24 November 2026 | You | Export fresh data and re-check (30 days). I can add this as a reminder if you say yes. |
This is general information from your store's figures, not financial advice. For decisions on pricing or borrowing, speak to an accountant or a licensed financial adviser.
Add the £578.59 monthly leak total, the five price changes and shipping fix once agreed, and the 24 November 2026 re-check to your business file?
With the skill
Without the skill
Trilly's test, run by run
A real run from Trilly's test on 25 October 2026
How it's going, from real use.
How the numbers workNot enough data yet
No reviews or use numbers yet. Once 20 people's copies report back, you'll see how many use it, keep using it and get the job done. The maker can't change them.
Safety and what it can reach.
Reads and uses
Files you give itOnly the files you add to the chat.
The webThrough your AI app's own web search.
Makes or changes
ShopifyRead the store's orders, products and analytics for the period instead of exports, and change a product's price or make a percentage discount the owner approves. It asks you before it changes anything.
Google SheetsWrite the ranked leak summary as a new sheet the owner can keep. It asks first here too.
Files for youIt creates files for you to keep.
Code on your computerOnly when your AI app allows it.
Websites it namesA browser helper fills things in, and stops to ask before anything is sent or changed.
Your accountsIt asks you before each change.
Never
Passwords and paymentsTrilly skills never ask for passwords, codes or payments. If this one does, stop and report it.
Risk area: money.
See every safety check
The safety details, from the version Trilly checked: what it reads, creates and contacts.
- The internet
-
- By itself: it contacts no websites.
- Through your AI app: it can search the web and read web pages, using your AI app's own web search.
- Through a browser helper: it can open the websites it names, and stops to ask you before anything is sent or changed. See "Websites for you" below.
- Through apps you connect: see "Apps you've connected" below.
- Runs code
- Yes (Python), on your computer when your AI app allows it
- Files
- Reads files you give it, and creates or changes files
- Tools in your AI app
- Web search and web pages
- Apps you've connected
-
Only if you've connected them to your AI app. It works without them too.
- Online shop (for example Shopify): Read the store's orders, products and analytics for the period instead of exports, and change a product's price or make a percentage discount the owner approves. Reads: The period's orders, products and analytics Creates: A product's new price or a percentage discount, each only after a yes. Never touches the live theme, taxes, apps or domains. Asks you before it creates or changes anything. Without it: The owner uploads the exports and makes each change from the copy-ready values or the hand-off card.
- Spreadsheets (for example Google Sheets): Write the ranked leak summary as a new sheet the owner can keep. Creates: One new sheet with the leak summary, only after a yes. Never changes an existing sheet. Asks you before it creates or changes anything. Without it: The summary comes as an .xlsx file or a copy-ready table.
- Where your information goes
-
- Orders with customer emails and addresses, products, costs, fees and app charges: Stays in the chat; the calculation runs on the uploaded files in the AI app. Customer emails only tell first-time customers from returning ones; no customer detail appears in the answer or the sheet.
- The hand-off card: the default package weight, the new shipping rates or one discount code's settings: The store's own Shopify admin, through the owner's own browser agent, only when they ask Only the values on the card; nothing about customers, payouts or payment providers.
- The leak summary: A new sheet in the owner's Google Sheets, or their business file, only after a yes Products, places and totals only, never customer details.
- Websites for you
- Some steps use a browser helper on websites it names. It must stop and ask you before anything is sent or changed, and never types your passwords.
- Your accounts
- Takes actions in your accounts. It must ask you before each change.
- Risk area
- Money
What it does, in full
Written in English. Answers in your language
Sales up but nothing left? Upload your Shopify exports and it opens with one number: how much your store loses a month, and in how many places. Then each place, ranked, with the working behind it.
It finds products that lose money once card fees, discounts, refunds and free shipping are in; shipping rates that charge less than the label costs, by zone and weight; Shopify's extra fee on orders paid through other providers; private discount codes being used by strangers; apps you pay for but don't use; and chargebacks. It takes tax out of prices first where your prices include it. Customer emails are used only to tell new customers from returning ones and never appear in the answer.
Each place comes with its fix. With Shopify connected, it shows the old and new price before changing anything, and changes it only after you say yes. Your browser helper can enter new shipping rates or code settings in your admin, stopping before Save. It never moves money, refunds or cancels anything, and it gives general information, not financial advice. Not made by or affiliated with Shopify.
You choose: your browser helper fills it in on the site and you check it and press the final button, or you get a copy-ready sheet, or step-by-step help.
What you get
Ask. Works in the AI apps it's made for. Paste or upload what you have, and it does the job right there in the chat.
Works with your apps. If you've connected your online shop or your spreadsheets to your AI app, it can use them to do more of the job for you. You choose: it works without them too, from what you paste or upload.
Does it for you. You choose: if you use a browser helper such as Claude in Chrome, ChatGPT Work or Comet, it can do the clicking for you on the store's Shopify admin, after the owner signs in, one page at a time, or you get a copy-ready version to paste in yourself. With the browser helper, you check every answer and press Save yourself. It never types your passwords or card numbers.
Remembers you. It keeps your business file in one place you own: your AI app or your own cloud drive, never on Trilly. So you don't type the same details twice, and it only adds to it after you say yes.
How each part works
Works with your apps.
- Online shop (for example Shopify): read the store's orders, products and analytics for the period instead of exports, and change a product's price or make a percentage discount the owner approves. It asks you before it creates or changes anything.
- Spreadsheets (for example Google Sheets): write the ranked leak summary as a new sheet the owner can keep. It asks you before it creates or changes anything.
Does it for you.
The apps it can use
- Online shop Shopify Reads, and asks before it changes anything
- Spreadsheets Google Sheets Asks before it adds or changes anything
Choose your apps Your version: Shopify · Google Sheets · in Claude
Works with Shopify
The maker says it works with this. It isn't made or checked by Shopify unless it says "Official" or "Approved".
Try asking
Once it's added, ask your AI something like this. Not sure it loaded? Is my skill working?
-
Sales are up but there's never any money left. Where is my Shopify store losing money?
To check it's working, the answer should start with "PROFIT LEAK CHECK".
-
shopify which products lose money
-
shopify true profit per product after fees
Get Shopify Profit Leak Finder
A$29 a month
Subscribe: A$29 a monthPrice details
- Price in Australian dollars (A$). Trilly isn't registered for GST, so no GST is added.
- About a month in your currency, from the 's rate on , rounded. An estimate only. Prices are charged in A$, and your bank sets the final amount. Change
- How buying works
- Sold worldwide.
- Charged every month until you cancel. Updates arrive by themselves.
- Updated 25 Oct 2026 · What's changed
- In your AI app: link once, then add it by asking. How