Marketplace Accounting & CFO
Accounting & CFO Services for Marketplace Startups
Principal vs. agent revenue under ASC 606, GMV and take rate reported honestly, payout and chargeback reconciliation, marketplace facilitator sales tax, and contribution margin per transaction.
Two-sided marketplaces move far more money than they keep, and that gap is where marketplace accounting goes wrong. Book GMV as revenue when you are really an agent and your top line is overstated; net everything when you are really the principal and you understate it. Payouts, refunds, chargebacks, and processor fees have to tie out to the ledger, and sales tax and seller reporting rules add obligations a SaaS company never faces. StartupCFO pairs a CPA-led accountant with ClariFi to give you a revenue line that holds up in diligence and the unit economics investors use to judge marketplace health.
What's Hard About Marketplace Finance
The marketplace-specific challenges that generic bookkeeping services miss.
Principal vs. agent: gross vs. net revenue
Under ASC 606 you report revenue gross only if you control the good or service before it reaches the buyer. Most marketplaces are agents and report their fee net, but managed or inventory-holding models can differ. We document the analysis so auditors and investors see one consistent answer.
GMV vs. net revenue vs. take rate
GMV is an operating metric, not revenue. We keep GMV, net revenue, and take rate clearly defined and reconciled to each other, so your board pack never mixes a gross number with a net margin.
Payment processor and payout reconciliation
Payouts from processors such as Stripe Connect net together buyer payments, seller payouts, fees, refunds, and chargebacks. We reconcile each payout to the ledger, separate funds owed to sellers from your own revenue, and book refund and chargeback reserves from your actual history.
Marketplace facilitator sales tax
Nearly every state with a sales tax now has a marketplace facilitator law that can make the platform responsible for collecting and remitting tax on third-party sales. We monitor nexus and facilitator obligations state by state and handle registration and filing.
Seller information reporting (Form 1099-K)
The 2025 federal law restored the $20,000 and 200-transaction Form 1099-K threshold for third-party settlement organizations, but some states set lower thresholds. We help you confirm who reports (you or your processor) and keep seller payout data clean enough to support it.
How StartupCFO Helps
One integrated team (a bookkeeper and CPA on every plan, CFO support from Foundation, a full fractional CFO on Growth) running the right marketplace playbook.
- Monthly close with a documented ASC 606 principal vs. agent position
- Payout reconciliation across buyer payments, seller payouts, fees, refunds, and chargebacks
- Seller funds and payables tracked separately from platform revenue
- Marketplace facilitator and sales tax nexus monitoring, registration, and filing
- GMV, net revenue, take rate, and contribution margin per transaction, reported to you from ClariFi (direct access on Growth)
- Federal and state tax returns at a 50% discount on preparation of one federal and one state return
- Fractional CFO on the Growth plan for unit economics, pricing, board packs, data room, and fundraising
Marketplace metrics we track
- GMV, net revenue, and take rate, reconciled to each other
- Contribution margin per transaction after processing, incentives, and support
- Refund, chargeback, and loss rates with reserves
- Buyer and seller CAC and payback by side of the market
- Cohort repeat rate and GMV retention by buyer and seller cohort
- Liquidity indicators such as fill rate or search-to-transaction rate, from your product data
- Cash runway under GMV growth and take rate scenarios
Frequently Asked Questions
Should our marketplace report revenue gross or net?
It depends on control. Under ASC 606 you are the principal, and report gross, only if you control the good or service before it transfers to the buyer, with indicators such as primary responsibility for fulfillment, inventory risk, and pricing discretion. Most marketplaces that connect independent sellers with buyers are agents and report only their fee or commission as revenue. We document the analysis for your specific model and apply it consistently.
What is the difference between GMV, net revenue, and take rate?
GMV is the total value of transactions on your platform. Net revenue is what you recognize under GAAP, which for an agent is usually your fees. Take rate is net revenue divided by GMV. Investors look at all three, and we keep them clearly defined and reconciled so your board pack never presents GMV as if it were revenue.
Do we have to issue Form 1099-K to our sellers?
It depends on how payments flow. If a payment processor settles payments to your sellers, it is often the filer; if your platform settles funds itself, you may be. The One Big Beautiful Bill Act restored the federal threshold for third-party settlement organizations to more than $20,000 and more than 200 transactions, applied retroactively, but several states use lower thresholds. We help you map the flow of funds and confirm obligations with your tax advisor.
Are we responsible for sales tax on our sellers' sales?
Often, yes. Marketplace facilitator laws in nearly every state with a sales tax can make the platform responsible for collecting and remitting tax on third-party sales once it crosses that state's threshold. The rules vary by state and by what is sold, so we monitor your exposure state by state and handle registration and filing.
How do you reconcile Stripe Connect or other processor payouts?
Our accountants break each payout into its parts: buyer charges, seller transfers, platform fees, processor fees, refunds, and chargebacks, and match them to the ledger. Seller balances are tracked as liabilities rather than revenue, and refund and chargeback reserves are set from your actual history so net revenue is not overstated.
Ready for Marketplace-Native Accounting?
Book a free consultation and we'll walk through how we'd handle your marketplace books, taxes, and CFO support. Once you start, your finance team is live within 2 business days.
