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Finance Decisions

Finance

Unit economics, margins, cash flow, and the costs operators discover too late. 9 articles published.

Finance

eCommerce Marketplace Fees: The Real Take Rate

Amazon's 15% referral fee becomes a 42% all-in take rate after FBA, storage, PPC, and returns. Etsy is 26%. eBay is 22%. Compare the actual cost across channels.

10 min read·May 10, 2026Read →
Finance

Inventory Valuation Methods: FIFO vs LIFO vs WAC

At $1.2M inventory with 8% cost inflation, FIFO vs LIFO produces a 4.7-point gross margin gap and a $20K annual tax difference on the same physical business.

9 min read·May 10, 2026Read →
Finance

Payment Processing: The Hidden Margin Drain in eCommerce

Your '2.5% + $0.30' rate is operationally 3.18%. Here's the 5-layer cost stack and the negotiation thresholds where each tier actually unlocks.

11 min read·May 10, 2026Read →
Finance

Cash Flow Forecasting: The Model Most eCommerce Operators Skip

A profitable 28%-net-margin eCommerce business can run out of cash in 90 days. Here's the 13-week model that catches the trough before it hits.

12 min read·May 10, 2026Read →
Finance

When Margins Lie: Contribution vs Gross in eCommerce

Gross margin says 65%. Contribution margin says 14%. Here's the model that closes the gap and the variable costs your accounting system hides.

11 min read·May 10, 2026Read →
Finance

Why Your Pricing Is Destroying Your Margin Without You Knowing

Most eCommerce operators price on gross margin and miss the true variable cost stack. Here's the contribution margin model that reveals your real price floor.

11 min read·May 10, 2026Read →
Finance

How Working Capital Strangles Growth at $50K/Month

The cash conversion cycle is the silent killer between $30K and $80K/month. The math behind working capital traps, five levers to manage them, and when to finance growth versus when to slow down.

8 min read·Mar 26, 2026Read →
Finance

Break-Even Math: When Does Your eCommerce Business Actually Make Money?

80 percent of eCommerce businesses fail within two years. The break-even math that separates them from the 20 percent is not complicated — it is just ignored.

10 min read·Mar 24, 2026Read →
Finance

The Real Cost of Your eCommerce Tool Stack

Most operators undercount tool costs by 40-60 percent. The full three-layer cost model — subscription, integration, and switching — pricing pages hide.

7 min read·Feb 28, 2026Read →

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