Finance infrastructure for SaaS & e-commerce

Know what to cut, what to scale, and what you can afford next.

A CFO-grade operating system, live within 30 days, without hiring a full finance team.

First CFO Stack turns scattered financial data into cash, margin, forecast, and KPI systems your SaaS or e-commerce business can actually make decisions from.

EY & EY-Parthenon experience
FP&A & modeling credentials
EY-ParthenonFMVAFPAP
From raw data to a tailored CFO dashboard and Stack Score
3 of 4 collaboration slots taken this month  ·  last slot open
The finance gap

You have bookkeeping. You do not yet have a finance operating system.

Bookkeeping records what happened. First CFO Stack connects the numbers to what happens next: hiring, pricing, marketing, inventory, cash, and growth. The goal is not another spreadsheet. It is a repeatable decision rhythm.

30 days
core system live after data is received
13 weeks
forward cash visibility
2 models
built for SaaS and e-commerce
1 owner
founder-led, direct delivery
Who we serve

Built for your business model, not every business.

Pick your model to see the warning signs, and the system component that solves each one.

Revenue is growing, but cash still feels unclear

ARR may be rising, but payroll, payment timing, annual contracts, deferred revenue, and GTM spend make the true runway hard to trust.

Solved with: Cash Command Center

Month-end numbers arrive too late

By the time reports are ready, the team has already made hiring and spending decisions without current visibility.

Solved with: Monthly CFO Brief + Playbook

Burn is not tied clearly to return

Sales, marketing, tools, and headcount are rising, but you can't separate efficient growth from activity that only expands burn.

Solved with: Margin Map + Decision Model

Hiring decisions rely on instinct

You can't see when a role becomes affordable, the output it must create, or its effect on runway.

Solved with: Decision Model + Cash Command Center

Pricing and packaging are not modeled

Contract structures, price changes, and expansion are discussed without a reliable view of revenue, margin, and cash impact.

Solved with: Decision Model + Margin Map

The founder is still the finance bridge

Reports exist, but you still manually connect SaaS metrics, operating costs, cash, and strategic decisions.

Solved with: Monthly CFO Brief + Playbook

Sales are growing, but cash still feels tight

Inventory, fulfilment, shipping, payroll, and vendor payments create pressure even when the top line looks healthy.

Solved with: Cash Command Center

Profit by product or channel is not trusted

Revenue is visible, but contribution profit after logistics, discounts, returns, and ad spend is not.

Solved with: Margin Map

Inventory decisions are reactive

Reorder timing and volume are managed without a reliable demand-and-cash view, creating stockout and overbuying risk.

Solved with: Decision Model + Cash Command Center

Ad spend creates activity, but ROI is blurry

You can't separate top-line growth from profitable growth after all variable costs.

Solved with: Margin Map + Decision Model

Margin leakage is hard to pinpoint

Supplier pricing, packaging, shipping, and discounting erode margin without a clear owner or diagnosis.

Solved with: Margin Map + Monthly CFO Brief

The founder still translates operations into numbers

You manually connect sales, inventory, marketing, margin, and cash before any decision can be made.

Solved with: Founder Finance Playbook
SaaS finance stackE-commerce finance stack
What we install

Your Finance Stack: five working components.

Not a pile of spreadsheets. A named operating system, consistent from install through every monthly delivery.

01

Cash Command Center

13-week cash forecast, runway view, and cash-risk calendar.

How much cash will be available each week, and where will payroll, inventory, or delayed collections create pressure?
02

Margin Map

Profitability broken down by product, customer, channel, plan, or line.

What is creating profit, where is margin leaking, and what should be repriced, cut, or scaled?
03

Decision Model

Driver-based forecast with hiring, pricing, marketing, inventory, and funding scenarios.

What happens to revenue, margin, cash, and funding needs before you commit to a decision?
04

Monthly CFO Brief

Actual vs plan, causes, risks, decisions, owners, and deadlines.

What changed, why, and what should management do next?
05

Founder Finance Playbook

KPI definitions, data owners, update process, and operating calendar.

How does the system stay reliable without you rebuilding the story every month?
How it works

Your finance stack, live in 30 days.

A four-stage installation. Each stage ends in something you can use, not just work in progress.

Days 1-5

Financial Review

Review accounting, revenue, operating expense, cash, payroll, and current SaaS or e-commerce metrics and forecasts.

Outcome: Diagnosis and an agreed implementation mandate.
Days 6-12

Cash & Margin Visibility

Build the first Cash Command Center and Margin Map. Identify immediate cash and margin risks.

Outcome: You see where cash goes and what creates profit.
Days 13-20

Decision Model

Build driver-based hiring, pricing, marketing, inventory, and downside scenarios.

Outcome: You can test decisions before committing cash.
Days 21-30

Launch & Operating Rhythm

Finalize dashboards, KPI ownership, the Monthly CFO Brief, and the Founder Finance Playbook.

Outcome: Your finance operating system is live and repeatable.

The 30-Day Installation Commitment

Once all agreed data has been received, your cash view, margin map, decision model, and KPI dashboard will be operational within 30 days. If the agreed deliverables are not ready, we keep working at no additional charge until they are.

The 30-day window starts after the required financial and operational data is received in the agreed format. Delays from missing data, inaccessible systems, or client-side approvals pause the timeline. We guarantee delivery of the agreed system, not business outcomes, which depend on your implementation and market conditions.

Proof

What the system changes.

Two representative engagements. Specific figures are shared, with client permission, during your fit call.

Marketing technology · ~$1.5M/yr

Learning what to cut, and where to double down

The company had real scale, but its P&L was read as a list of expenses, not a decision system. There was no consistent owner or ROI logic for major spend, and specialists were absorbed in repeatable admin work.

What we installed
  • P&L rebuilt by function, owner, and decision category
  • Operating-expense ROI map
  • Task map for lower-cost delegation
  • Driver-based forecast linking spend to margin and runway
  • Monthly CFO Brief with owners and deadlines
Result

A repeatable method for deciding which costs to eliminate, which work to delegate, and which high-return capabilities deserved more investment.

Luxury DTC e-commerce

From messy data to margin, inventory, and cash control

Financial and operational data was fragmented and hard to reconcile. The founder could not clearly state true margin or owner economics, and inventory decisions were made without a forward cash view.

What we installed
  • Full P&L rebuilt by channel, product, and function
  • Contribution margin after logistics, discounts, and returns
  • Inventory reorder and cash-requirement model
  • 13-week cash forecast across payroll, vendors, and collections
  • Vendor and subcontractor review
Result

Trusted contribution economics, a forward cash view for inventory buys, and clear ownership of where margin was being made and lost.

Results are client-specific and depend on implementation and market conditions. They are not guaranteed.

See the case-study library
Limited-time

Free Assessment August

6 free assessment calls available this week

Book a 30-minute call with me and we'll talk through your direction and optimization tactics, and find concrete ways to optimize your business. Completely free. Only free until August 12.

Book your slot
Andrija Milojevic, First CFO Stack
Standalone offer

Need a model before a full stack?

FP&A & Decision Model Build

A driver-based model your team can actually operate for planning, fundraising, hiring, pricing, or inventory decisions. A decision tool with documentation and a walkthrough, not a static investor spreadsheet.

  • Revenue and cost-driver model
  • Base, downside, and upside scenarios
  • Cash runway and funding requirements
  • SaaS or e-commerce operating metrics
Request a fixed proposal
Clients

What founders say.

"The financial model for our SaaS startup was clear, flexible, and easy for our team to use in planning and investor discussions. Andrija is highly attentive to detail, takes ownership in high-velocity environments, and is accountable to outcomes."

Samer T. · Founder, SaaS

"What stood out most was how quickly he understood my business, and the insightful suggestions that improved the model. He delivered within the agreed timeline. I highly recommend Andrija."

Michael · Insurance aggregator

"Smart, creative, hard working, and dedicated with automation."

Joshua Rosenthal · Theravoca
More about how I work
Free finance-readiness check

What's your Stack Score?

Seventeen questions, about two minutes. The check the people who control your future use to judge your numbers. I review every profile personally and get back to you.

Get Your Stack Score
Our guarantee
30

The 30-Day Money-Back Guarantee

Work with us for 30 days. If you are not satisfied with how the collaboration is going, email us within that window to request a refund and we will return your fee in full. The risk of starting sits with us, not you.

Get started

Let's connect.

Send a message and I'll set up a free consultation and CFO X-ray: a quick, honest read on where your finances stand and what you actually need next. You work directly with me.

Book a free assessment call
Every installation is personally led by Andrija, so only a limited number of new installations are taken on each month. If a fundraise, board meeting, hiring decision, inventory buy, or pricing change is coming, that is the right time to start.

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