Fractional CFO for online brokers companies
Online broker revenue is a mix of commissions, payment for order flow where permitted, financing spreads on margin lending, interest on uninvested cash and FX markup. Each line behaves differently with volatility and rate cycles. Customer assets and segregated client money sit off the operating balance sheet but drive interest revenue and regulatory capital - and the rules differ materially across jurisdictions.
The CFO function delivers segregation, capital and revenue-by-line discipline. Customer fund segregation under SEC Rule 15c3-3, CASS in the UK or local equivalents has to be reconciled daily. Regulatory capital under Net Capital, IFPR or MiFID IFR has to be tracked alongside the operating P&L, and trading revenue has to be modelled against volume and volatility paths auditors will stress-test.
Flow provides financial modelling, FP&A and fractional CFO advisory to online broker companies across retail equity and options platforms, crypto brokers, FX and CFD brokers, multi-asset platforms and B2B execution and clearing providers.
KPIs to track for "online brokers" startups
We're very 'KPI-driven' fractional CFOs, and we make sure to monitor the right metrics for your startup.
Funded accounts
Customer assets
Net new assets
Trades per day
ARPU
Commission & PFOF revenue
Margin loan balances
Interest on cash
Asset retention
Financial modelling for "online brokers" startups
As fractional CFOs, we build KPI-driven financial models that are insightful and easy to maintain.
Financial modelling is both art and science - models must be robust, but also understandable, and useful for both internal planning and VC fundraising purposes. Hire a fractional CFO who knows how to handle both sides of the equation.
Revenue by line build
Commissions, PFOF, margin financing spread, interest on uninvested cash and FX markup modelled separately against volume, balances and rate path. Each line scales with a different driver and gets priced differently by acquirers.
Trades per day and ARPU model
Active funded accounts projected by cohort, trades per day driven from volatility and product mix, ARPU built from the per-trade and per-asset economics. Forecasts that survive when VIX moves are the ones boards trust.
Interest on customer cash
Uninvested customer cash modelled against the curve with a defensible sweep economics split between platform and customer. Often the largest single revenue line in a rising rate environment and the first to compress when rates fall.
Margin lending book economics
Margin loan balances by collateral type and customer segment, financed at the platform's cost of funds with the spread captured as net financing revenue. Sized against haircuts, default risk and the regulatory capital it consumes.
Customer asset segregation
Customer assets and segregated client money reconciled daily under SEC Rule 15c3-3, FCA CASS or local equivalents, with the bridge between operating balance sheet and customer funds shown clearly. Examiners and acquirers both start here.
Regulatory capital headroom
Net Capital, IFPR K-factors or MiFID IFR requirements tracked alongside the operating P&L, with stress scenarios that show how a volatility spike consumes capital. The metric that decides whether a growth quarter triggers a capital raise.
Founders and investors we've worked with
We've supported winning builders across online brokers and beyond.
Marcura
We acted as fractional CFO to Dubai-based Marcura, owner of maritime payroll and B2B payments platform MarTrust, advising on the strategic e-Wallet vendor selection and supporting product/finance integration.
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Bonart
We've worked as fractional CFO with Bonart, a Zurich-based independent Swiss strategic advisory and execution platform for PE and investor fundraising, providing long-term confidential valuation guidance.
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Lemonade
As a fractional CFO we performed a confidential valuation of Lemonade, the publicly listed full-stack insurer powered by AI and behavioral economics, supporting Elevator Fund's portfolio management.
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TBô
We acted as fractional CFO to TBô, a Zurich-based tech-enabled DTC male underwear brand, building a bottom-up financial / operating model with cohort-level KPIs and positioning the company for its next venture round.
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Onlogist
We acted as fractional CFO to Onlogist, a Hamburg-based online marketplace for last-mile vehicle transfer, providing confidential valuation guidance and operating model support.
See moreRecent fractional CFO track record
See our fractional CFO and financial modelling experience across online brokers and beyond.
Simple pricing
No hidden costs, no complicated long-term contracts. We understand how important flexibility is for online brokers startups.
Per month
- Accounting / FP&A tech stack implementation
- Monthly financial statements and reporting pack
- Quarterly board pack with detailed financial analysis (with variance analysis vs. budget, relevant KPI observations etc.)
- Investor-friendly output
Per month
- Everything in Core, plus
- Operating model (via an online platform like Runway or Excel-based)
- Ongoing model maintenance, refining projections, burn/runway management
- Customer cohorts modelling, churn and retention analysis
- LTV / CAC, unit economics analysis
- Cap table management
Per month
- Everything in Grow, plus
- M&A / fundraising support; review of business plan
- Pitch deck preparation
- Investor approach strategy / list building
- Due diligence support and deal negotiation
- Valuation as required and free access to Multiples Pro
Packages shown are illustrative, final pricing is tailored to client requirements.
Explore our fractional CFO offering for similar verticals
We're a specialized fractional CFO to fintech companies.
Our fractional CFO experience spans across all fintech verticals.
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We know tech inside & out.
We provide fractional CFO services to companies operating across the entire tech.
More services
We help you scale by providing fractional CFO advice, through fundraising and a successful M&A exit.
VC fundraising for online brokers companies
We help you prepare materials, reach out to investors in our extensive network, negotiate fair term sheets and structure the VC round.
Learn moreM&A for online brokers companies
We advise winning tech companies on M&A exits, and over the years successfully executed numerous transactions with both financial and strategic buyers.
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Schedule a call to get a health check on your business and see how we could help.
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