MarginLumeGet the free kit
Finance clarity for ecommerce founders

Know what your store actually keeps.

Practical financial models and expert analysis for Shopify and DTC brands that have revenue—but still make margin, pricing, inventory and cash decisions in the dark.

Get the free starter kit Book a margin review
PLFMCO

Built from 10+ years in costing, profitability and FP&A

MarginLumeLast 30 days
Operating profit$35,427
+8.4%
Net sales$119,435
True gross margin69.4%
Contribution profit$43,927
Operating profit$35,427
!
Margin signalSKU-014 loses $3.20 per discounted order
Made for modern operators onSHOPIFYAMAZONKLAVIYOMETATIKTOK SHOP
The gap we close

Revenue is visible.
Profit is usually not.

Shopify tells you what sold. Ad platforms tell you what was spent. Neither tells you what remains after product cost, freight, fees, returns, discounts and inventory timing.

01

Hidden landed costs

Duty, freight and handling quietly turn a “healthy” SKU into a margin leak.

02

Discount guesswork

A promotion can lift revenue while reducing the cash you keep from every order.

03

ROAS without profit

Platform ROAS ignores COGS, fees and fulfilment—the costs that define break-even.

Choose the right level of support

Start simple.
Go deeper when needed.

No software migration. No long contract. Use the tool yourself or let us turn your data into a focused action plan.

01
Free

Ecommerce Profit Starter Kit

One practical Excel calculator plus eight plain-English guides to find missing costs and understand the numbers that drive profit.

  • True margin + break-even calculator
  • 60-point hidden-cost audit
  • Financial formulas and decision guides
Get the complete kit free
Most popular
02
Do it yourself

Premium Finance System

Fifteen decision-ready Excel tools covering profit, pricing, cash, inventory, marketing, suppliers, returns and growth.

  • 15 advanced Excel workbooks
  • Dashboards, scenarios and built-in checks
  • Example data + lifetime use
Launch price€69€89
03
Done with you

True Margin Review

We analyse your store export and full cost structure, then show exactly where profit leaks and what to change first.

  • SKU-level profitability model
  • Founder-ready PDF report
  • 45-minute action call
Founding cohort$349$590
Inside the toolkit

Fifteen tools.
One operating system.

Every workbook connects an operational decision to its financial consequence—without turning the founder into an accountant or adding another software subscription.

Explore the full toolkit
01
Profit foundationMargin, landed cost and pricing
START
02
Cash & inventoryReorders, purchase orders and working capital
SYSTEM
03
Marketing & customersROAS, budget, LTV, retention and promotions
SYSTEM
04
Planning & managementP&L forecast, monthly pack and 90-day roadmap
SYSTEM
05
Risk & growthReturns, suppliers and global expansion
SYSTEM
Simple launch pricing

Pay for clarity,
not another dashboard.

Start with a free diagnostic, own the models forever, or get a tailored review of your actual store.

Starter
€0

One fast way to find whether your “margin” is missing key costs.

Get the free kit
  • True margin calculator
  • Break-even ROAS
  • Cost checklist
Best first purchase
Premium Finance System
€69 one time

Fifteen connected Excel tools for sharper commercial and financial decisions.

Get all 15 tools
  • Complete 15-workbook system
  • Example data, instructions and checks
  • Lifetime use for one business
Margin Review
$349 pilot

Your actual data, analysed and translated into priorities and actions.

Apply for a review
  • Tailored SKU analysis
  • PDF decision report
  • 45-minute founder call
$179 — 60-minute operator or China sourcing advisory$39/mo — one new tool + two written questions every month
Ongoing support when you need it

Use the system.
Ask when blocked.

The core toolkit is a one-time purchase. Advisory and membership stay optional, so support does not become another fixed cost before it creates value.

Founding membership

MarginLume Monthly

Receive one new practical finance or operating tool each month, plus two written questions for your current business decisions.

$39/monthJoin the waitlist
Focused expert help

Operator Advisory

A 60-minute working session for a business model, margin problem, supplier decision or China sourcing issue—with concrete next actions.

$179/sessionBook a session
“
More revenue is exciting. More retained profit is what builds the business.

MarginLume turns scattered ecommerce numbers into decisions a founder can act on this week.

PL
Built by an operator, not a template factory.

10+ years across costing, financial planning, profitability and supply chain decisions.

Your next decision can be clearer

Stop scaling the parts
that do not make money.

Start free. See the gap. Fix the highest-impact leak first.

Get the free starter kit