Fractional CFO for Ecommerce Brands
Ecommerce lives and dies on contribution margin and the cash tied up in inventory. A fractional CFO connects ad spend, fulfillment, and stock decisions to the cash actually left at the end of the month.
Book a call with PeterWhere the money actually moves
An ecommerce brand can grow revenue every month and go broke doing it. The reason is that growth consumes cash before it produces it: inventory is bought and paid for, ads are spent to move it, the customer pays, and the processor holds part of the money. The gap between paying the supplier and collecting from the customer is the real constraint on how fast the business can grow, and it lives on the balance sheet where most owners never look.
The second problem is blended reporting. A single return on ad spend figure across all products and all channels averages the winners with the losers and tells you to spend more overall. Contribution margin calculated per product, after landed cost, fulfillment, shipping, returns and processing fees, usually shows that a minority of the catalogue funds the entire business and a long tail quietly destroys value.
What we watch
Contribution Margin
How it is built: Selling price less landed product cost, fulfillment, outbound shipping, payment processing, and the expected cost of returns, calculated per unit or per order.
Why it matters: It is the amount each sale contributes to covering overhead and ad spend. Any product whose contribution margin is thin cannot be advertised into profitability, and knowing which ones those are changes the media plan immediately.
Inventory Cash Cycle
How it is built: Days inventory sits before selling, plus days to collect from the customer and the processor, less the days of credit the supplier extends.
Why it matters: This is how many days of working capital every growth dollar demands. A long cycle means growth has to be funded, and it explains the specific mechanism by which a profitable brand runs out of money.
Contribution-Adjusted ROAS
How it is built: Contribution margin generated by a campaign divided by the spend on that campaign, rather than revenue divided by spend.
Why it matters: Revenue-based return on ad spend rewards discounting and high-priced, low-margin products. Measuring against contribution shows which campaigns leave money behind after the goods are actually delivered.
Operating Cash Flow
How it is built: Cash generated by the business itself, after the movement in inventory, payables and receivables, before financing.
Why it matters: Profit is an accounting result and cash is the constraint. Watching the two side by side is how an owner sees a strong month on the profit and loss statement turn into a bank balance that went backwards.
Common financial pain points
- Revenue grows but cash keeps getting swallowed by inventory.
- Blended ROAS masks which products and channels actually pay.
- Returns, shipping, and fees erode margin no one is watching.
- Reorder timing is a guess instead of a cash decision.
- Landed cost excludes duty and freight, so every margin figure reads high.
How a fractional CFO helps
- Build true contribution margin by product and by channel.
- Map the inventory cash conversion cycle end to end.
- Tie ad spend to marginal profit, not vanity ROAS.
- Forecast cash around reorder cycles and seasonality.
- Bring discipline to discounting and bundle economics.
- Set reorder points against cash available rather than stock alerts.
The first ninety days
- 01
Days 1 to 30: find the real margin
Build landed cost per SKU including freight, duty and inbound handling. Layer fulfillment, shipping, processing and returns on top. Rank the catalogue by contribution and show which products fund the business and which consume it.
- 02
Days 31 to 60: model the cash
Map the full cash conversion cycle from purchase order to collected payment. Build a rolling cash forecast around reorder timing and seasonality. Set reorder points that respect the bank balance rather than only the stock level.
- 03
Days 61 to 90: connect spend to profit
Rebuild media reporting on contribution rather than revenue. Set discount and bundle rules that protect margin. Install a monthly pack showing cash, contribution and inventory in one view.
What you receive
- Landed cost and contribution margin model by SKU
- Rolling thirteen-week cash forecast tied to reorder cycles
- Channel profitability on a contribution basis
- Inventory purchasing plan sized to available cash
- Discount and bundle guardrails
- A live dashboard your numbers flow into
Fractional CFO for ecommerce: common questions
Why is my ecommerce brand profitable but always short of cash?
Almost always the inventory cycle. You pay the supplier, then wait for goods to arrive, then wait for them to sell, then wait for the processor to release the funds. Every one of those steps sits between your money going out and coming back, so a growing month buys more stock than the previous month returned in cash. The profit is real and it is sitting in a warehouse.
What is the difference between blended ROAS and contribution-adjusted ROAS?
Blended return on ad spend divides all revenue by all spend, which mixes high-margin and low-margin products together and treats a discounted sale the same as a full-price one. Contribution-adjusted return divides the actual margin a campaign produced by what it cost, after goods, shipping, fees and returns. The two frequently point in opposite directions.
What should be included in landed cost?
The unit price from the supplier plus inbound freight, duty and tariffs, customs brokerage, inbound handling and any inspection or rework. Leaving freight and duty out is the single most common reason a brand believes its margin is healthy when it is not, and the error compounds every time a price is set off that wrong number.
How do I decide how much inventory to reorder?
Start from cash rather than from stock levels. Work out how much cash the business can commit without breaching its minimum balance, then allocate that across products by contribution margin and sell-through rate, then check the resulting order against lead times. A reorder point driven only by a low-stock alert ignores whether the money exists.
Do I need a fractional CFO or a bookkeeper?
You need both, doing different jobs. The bookkeeper keeps the ledger accurate and closes the month. The fractional CFO decides what to do with the result: which products to keep, how much stock to buy, what to pay for a customer, and whether a strong month is actually generating cash. Neither role substitutes for the other.
How do returns affect margin reporting?
Returns hit three times: the revenue reverses, the outbound shipping and processing fees are usually unrecoverable, and the returned unit is often unsellable at full price. Building an expected return rate into contribution margin per product, rather than treating returns as a lump of overhead, changes which products look worth advertising.
Can a fractional CFO help me get financing for inventory?
Yes, and the preparation matters more than the application. A lender wants a cash conversion cycle they can follow, an inventory position they can verify, margin that survives their own scrutiny, and a forecast that shows repayment out of operations. Assembling that package is standard fractional CFO work and it is what separates an approval from a decline.
Ready to see your numbers clearly?
Book a call to talk through your ecommerce business and what the first ninety days would cover.
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