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Fractional CFO for E-commerce & Marketplaces
Take rate, GMV, and contribution margin become decision-ready inputs. Senior CFO judgment without the full-time cost.

GMV is growing. Contribution margin is not.
Marketplace and e-commerce finance breaks differently than SaaS. Revenue equals take rate times GMV, not subscription count. Inventory ties up capital for 60 to 150 days before a sale clears. Platform fees can consume roughly 30% of marketplace revenue. When these mechanics are modeled with SaaS assumptions, the numbers look healthier than they are.
The trigger arrives when a board asks for contribution margin per transaction and the answer takes three days of spreadsheet work. Or when a fundraising process exposes that buyer and seller economics were blended into one CAC number. Or when Q4 inventory commitments create a cash crunch nobody modeled. Reporting happens, but it frames history instead of trade-offs.
Is your GMV growth hiding shrinking unit economics?
High GMV with declining contribution margin per transaction means the marketplace is scaling losses, not value. Take rate compression, rising buyer and seller CAC, and platform fee creep erode the margin that matters, yet the dashboard celebrates the top line. Without contribution margin per transaction as the health signal, growth decisions are made on a metric that hides the problem.
Can you see cash flow across inventory and payout cycles?
E-commerce brands face a 60-to-150-day cycle from cash-out on inventory orders to cash-in from sales, before returns. Marketplaces manage escrow, payout timing, and float. When these cycles are not modeled in a rolling cash forecast, surprises arrive as overdrafts or missed purchase orders. The team reacts to cash crunches instead of planning around them, and supplier terms become a blind spot.
Is your financial model built for a two-sided business?
Buyer and seller economics must be tracked separately. Blending them hides the true cost of supply versus demand acquisition. A marketplace without a two-sided unit economics model debates CAC instead of using it, forecasts GMV as a top-line guess rather than a demand-supply matching output, and cannot answer whether liquidity is improving or deteriorating. The model should reflect how the business actually works.
Does your board reporting answer what to do next?
Board decks report what happened: GMV growth, revenue, burn. They rarely frame the trade-offs the board actually needs to weigh: whether to invest in seller acquisition or buyer retention, whether to raise take rate or expand categories, whether the cash runway supports the inventory plan. When reporting answers history instead of choices, the board meeting becomes a recap instead of a decision session.
Why marketplace and e-commerce founders choose Fiscallion
Financial Planning and Analysis
Fundraising & Investor Support
Actionable KPI Dashboards
Growth Focus CFO Advisory
The financial infrastructure we build for marketplaces and e-commerce brands
Take rate and GMV-to-revenue model
Maps your take rate structure to a revenue bridge from GMV. Separates gross take rate from net take rate after platform fees, refunds, and chargebacks. Shows how revenue responds to take rate changes, category mix shifts, and GMV growth, so pricing and fee decisions are grounded in their actual revenue impact, not guess
Two-sided unit economics model
Tracks buyer CAC and seller CAC separately, contribution margin per transaction, and LTV:CAC by side. Exposes whether supply or demand acquisition is the bottleneck. Replaces blended CAC debates with side-specific economics, so acquisition spend is allocated where it improves liquidity and contribution margin.
Inventory-aware cash flow forecast
A 13-week rolling cash forecast incorporating PO timing, supplier payment terms, days of supply, and the cash conversion cycle. Models the 60-to-150-day gap between inventory cash-out and sales cash-in. Tells you when to commit to purchase orders, when to negotiate supplier terms, and when to hold cash: before the crun
Contribution margin by channel and SKU
Calculates fully-loaded contribution margin after ad spend, fulfillment, marketplace fees, returns, and shipping for each channel and SKU. The gap between gross margin and true contribution margin can be 15-20 percentage points. This model makes the gap visible: showing which products and channels are profitable after e
Marketplace liquidity and growth model
Models supply-demand matching, repeat purchase rate, seller retention, and liquidity efficiency. Shows whether the marketplace is gaining or losing liquidity over time. Connects supply-side retention to demand-side experience, so growth investments are evaluated by impact on transaction frequency and matching efficien
Board and fundraising readiness pack
Investor-ready financials built on marketplace and e-commerce metrics: unit economics narrative, take rate trajectory, contribution margin path, scenario models, and diligence documentation. Frames trade-offs the board needs to weigh: supply versus demand investment, take rate versus growth, inventory versus runway. Pre
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Your Questions, Answered
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