MarginLume Premium Finance System

Fifteen Excel tools.
One clearer business.

A practical ecommerce finance operating system for founders who need better margin, pricing, cash, inventory, marketing and growth decisions—without another analytics subscription.

15advanced workbooks
5connected decision systems
0macros or integrations required
payment, lifetime internal use
Everything included

From unit margin
to 90-day action.

The tools are useful independently and stronger as one system. Start with product economics, then move into cash, marketing, planning and growth decisions using consistent definitions.

01

Profit Foundation

Build one reliable definition of revenue, cost and contribution profit.

01
True Margin & SKU Profitability

Rank products by contribution profit and identify margin leaks.

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02
Landed Cost Calculator

Allocate freight, duty and handling into a reliable unit cost.

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03
Pricing & Discount Simulator

Test price, volume and discount decisions before launch.

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02

Cash, Inventory & Suppliers

Protect working capital while improving purchasing and supplier decisions.

04
Cash Flow & Inventory Planner

Plan cash pressure, reorder timing and inventory funding.

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08
Purchase Order & Working Capital Planner

Compare quotes, order quantities and payment timing.

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13
Supplier Scorecard & Negotiation Planner

Rank suppliers and quantify negotiation value.

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03

Marketing & Customer Economics

Connect media, promotions and retention to the profit they actually create.

05
Marketing Break-even ROAS

Set break-even CPA and ROAS from real contribution economics.

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07
Marketing Budget Allocator & Scale Planner

Move spend toward channels with stronger incremental returns.

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09
LTV, Retention & Cohort Economics

Measure repeat contribution and acceptable acquisition cost.

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12
Promotion & Campaign Profit Planner

Model discounts, cannibalisation and campaign post-mortems.

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04

Planning & Management

Turn scattered analysis into a repeatable operating rhythm.

06
12-Month P&L Forecast & Scenario Planner

Build base, downside and upside operating forecasts.

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10
Monthly Ecommerce Management Pack

Review KPIs, P&L performance, risks and actions each month.

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15
90-Day Profit Improvement System

Prioritise initiatives and track accountable profit delivery.

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05

Risk & Growth

Stress-test the issues that can quietly destroy otherwise healthy growth.

11
Returns & Refunds Profitability Analyzer

Find preventable return loss by SKU and root cause.

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14
Global Market Expansion Unit Economics

Compare countries after tax, logistics, returns, CAC and FX.

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Designed for use, not decoration

Open. Input.
Decide.

Every workbook follows the same visual logic, includes realistic sample data and separates editable assumptions from calculated outputs.

01

Replace sample inputs

Follow the Start Here sheet and enter your actual operating assumptions in the yellow input fields.

02

Read the decision outputs

Use the dashboard, scenarios and control sheet to understand impact, risk and data gaps.

03

Act and review

Prioritise the strongest profit or cash opportunity and update the relevant model as the decision develops.

Before you buy

Clear scope.
No hidden dependency.

What software do I need?

A current desktop version of Microsoft Excel is recommended. The files use standard formulas, tables, charts and data validation—no macros or external connections.

Do the tools connect automatically?

Each workbook is intentionally standalone. They follow the same financial definitions, so you can use only what you need without maintaining a fragile master file.

Is this bookkeeping or tax advice?

No. The system supports commercial and management decisions. It does not replace your accountant, tax adviser or statutory reporting.

Can my team use the files?

The launch licence covers one business and its internal team. Redistribution, resale and use across unrelated client businesses are not included.

Own the numbers

One purchase.
Fifteen sharper decisions.

Launch price: €69. Regular price: €89.

Get the full system for €69