What a Fractional CFO Actually Does for Ecommerce: Day-by-Day

A fractional CFO at an ecommerce brand runs a 90-day sprint then a weekly cadence. Discovery and cash audit days 1–30, model and scorecards days 31–60, delivery and handoff to BAU days 61–90. Deliverable: a 10–15 page monthly pack, rolling cash forecast, and 9 months of warning before any cash issue.

"What does a fractional CFO actually do" gets a different answer depending on who you ask. A public-practice accountant who relabelled will say reporting and tax planning. An ex-FP&A lead will say models. Neither is what an ecommerce brand at $5M–$50M actually needs.

This is the operator answer. The day-by-day, week-by-week breakdown of what we do at Eightx across 35+ portfolio brands with a combined $650M+ in managed revenue. Same 90-day sprint at every brand, same weekly cadence, same monthly reporting pack. By the end of week 8 or 9, the founder is making decisions with confidence rather than gut.

"There's a range of types of fractional CFO. You have the somebody that was a public practice accountant that's just calling themselves a fractional CFO. We aren't that type. I only hire people who have been in like live head of finance roles in a company so they've been responsible for cash and had to figure it out. So the way that we work is that we're going to give you a bunch of numbers. We're going to give you a 10 to 15 page reporting back every month. But the first page is going to have notes on like, what does this all mean for you?" — Matt Putra, Managing Partner

The 90-day sprint: how a fractional CFO ramps in

"We always start off with a 90 day initial sprint. The reason we call it a sprint and the reason we have 90 days is because we really don't know a ton about you today. And we want to be very informed as quickly as possible." The sprint exists because the alternative—a CFO who arrives, sits in monthly meetings, and pretends they have context they do not—destroys value. Three 30-day blocks.

Days 1–30: Discovery and cash audit

The first 30 days are heavy on questions, light on opinions. The CFO gets access to bank accounts, ERP (NetSuite, QuickBooks, Xero), Shopify and Amazon admin, ad platforms (Meta, Google, TikTok), inventory tooling, payroll, and any existing reporting.

We ask the founder for 1 hour per week of focused time. "We want one hour per week, at least in the first 90 days. And we're just going to pester you with questions." The questions are intentionally basic at first—vendor terms, channel split, inventory turn, cohort behaviour, CAC by channel, SKU-level contribution margin, repeat purchase rate.

"The first two to three weeks we're going to ask lots of dumb questions. We believe that if we're unafraid to ask them questions, we'll look stupid at first, but we'll learn way faster than other people who don't want to ask them questions. So by week three, week four, we will tend to start adding value. Then you'll be like, okay, these guys know what they're talking about."

The day 1–30 deliverables:

• Bank-balance based cash position. "Net cash flow—just how much cash is the business producing? The way to do this is just look at your bank balance from one week to the next. What's the difference?" That is the start. We then layer in operating cash flow, AP timing, AR timing, and PO commitments.
• 13-week rolling cash forecast. Every payment that is contractually committed—rent, payroll, debt service, recurring software, supplier prepayments—mapped against expected receipts. Stress-tested with worst-case (no new sales, slow AR collection, all AP paid on time).
• Inventory and PO timing map. What is on the water, what is in the warehouse, what is committed but not yet paid. Inventory turn by category. Days of supply.
• Channel and SKU profitability snapshot. Contribution margin after ad spend, freight, duties, packaging, fulfillment, returns, payment processing, and marketplace fees. Done in draft form for sense-checking.
• Risk register. What is mid-flight that nobody else knows about. Verbal vendor agreements, audit adjustments, lender covenants, expiring contracts, tax positions.

By day 30, the CFO has enough context to lead the next conversation rather than follow it.

Days 31–60: Model building and cadence

Days 31–60 are where the work shifts from absorbing context to producing it. The deliverable is the financial model and the meeting cadence that runs off it.

"It is what we call an operational model. If you're going to go raise a bunch of equity, sometimes we build you like an investment bank version, but this is good for operating business. We roll your forecasting frequently. We look at the actuals and the results coming in, look at how we're doing, and roll the forecast."

The operational model includes:

• Driver-based revenue build. Sessions, conversion rate, AOV, repeat rate by cohort—by channel. Not a top-down "grow 30%" line.
• Marketing model. Spend by channel, blended and channel-level CAC, CAC payback, break-even ROAS, contribution margin after ads. ROAS-gated logic where appropriate ("spend up until blended ROAS hits X").
• Inventory model. Reorder timing, lead times, MOQ constraints, deposit and balance payment timing, days of supply targets by SKU.
• P&L by channel. Shopify, Amazon, marketplace, wholesale—each its own line set with its own fee structure, margin profile, and contribution.
• Cash flow statement. Built from the model, not bolted on. Working capital, capex, debt service, tax, distributions. Reconciles back to the 13-week.
• Scorecards. Each department—marketing, ops, customer, finance—gets a scorecard. The scorecard is what gets reviewed weekly.

"We're showing you the model, we're turning it over a bunch of times, we're looking at scenarios, and by the end of sort of usually 8 to 9 weeks, we have a first year's budget and a decent look at a multi-year forecast." That is the day-60 marker.

Days 61–90: Delivery and handoff to BAU

Days 61–90 are the transition into business-as-usual. The model is signed off. The first proper monthly reporting pack is produced. The weekly cadence is locked in. The CFO moves from "ramping" to "in the seat."

"Business as usual depending on what you pick—one or two days a week, we will be in the seat doing things—regular intervals, reviewing, reporting." For most $5M–$50M brands that is 15–30 hours per month, with spikes during fundraises, audits, or seasonal peaks.

Day-90 deliverables:

• Signed-off year-one budget
• Multi-year forecast (typically 3 years)
• Monthly reporting pack v1, delivered with live walkthrough
• Weekly cash forecast running on rolling cadence
• Department scorecards in production
• Meeting cadence locked: weekly leadership presence, monthly close walkthrough, quarterly board pack
• Risk register turned into a watch list with owners

A typical week: what does a fractional CFO do day-to-day?

Once business-as-usual is live, the rhythm is structured but flexible. "On our whatever meeting cadence we end up choosing, we'll be from tactical to high level and kind of flexing based on what we're hearing from you. That's live in your mind. And of course, if we see the cash flow having issues, we're going to tell you. The goal is to give you nine months warning before a cash flow issue. And we tend to do that well."

Below is the typical week at a $10M–$30M ecommerce brand. The exact day labels vary; the cadence does not.

Monday: Operations review

Mondays are for operations. Last week's actuals come in—sessions, conversion, AOV, channel revenue, ad spend, contribution margin after ads. The CFO walks variance against the rolling forecast with the founder and heads of marketing and ops. Decisions: what to flex up, what to pull back, what to investigate.

"If your CSE is declining, like maybe we spend more, or if it's increasing, is it CPM, is it CTR? Like what's going on and what do we do about it?" Not a status meeting. The CFO reads the numbers and recommends action.

Tuesday: Cash review

Tuesdays are cash. The 13-week rolling forecast is updated against actual bank balances, AP cleared, AR collected, and new commitments. "We are remodeling the cash flows very regularly. Those half hour meetings, we do this with a number of people. They're focused on cash and like live problems." 30-minute working session. Output: what does cash look like for the next 13 weeks, and what changes are we making.

Wednesday: Board and reporting prep

Mid-week is forward-facing. If a board pack is due that quarter, Wednesday is when it gets drafted. Otherwise it is variance commentary, scenario modelling, or fundraise prep. This is also when the monthly close work happens in week one of every month—reviewing the bookkeeping team's output, signing off accruals, confirming channel reconciliations.

Thursday: Team and department alignment

Thursdays are cross-functional. Marketing standup, ops review, sometimes a contribution margin deep-dive on a SKU launch or channel test. "Understanding your customers, external market—we pull these things in." Vendor and lender conversations also happen here—bank covenant reporting, supplier payment renegotiations, lender check-ins. The CFO is the face of the brand to financial counterparties.

Friday: Rolling forecast update

Fridays close the loop. Forecast gets rolled. New assumptions in—updated CAC, product launch timing, revised inventory commitments—and the model reflects them by Monday. "We're reforecasting the year's results very regularly as well—we want to spot opportunities as well as issues." Quarterly the model gets a bigger refresh; weekly it gets touched. The founder never opens the model and finds it stale.

The monthly close cycle: what gets delivered, when

The monthly close is where the bookkeeping team and CFO interlock. Bookkeeping owns transaction recording, channel reconciliation (Shopify, Amazon, Stripe, A2X), bank rec, payroll posting, AP and AR entry. The CFO owns analysis, accruals, and the reporting pack.

Day of month	What happens	Owner
Day 1–3	Channel reconciliations, bank rec, AP/AR posting	Bookkeeping team
Day 4–5	Inventory roll, COGS true-up, accruals	Bookkeeping + CFO
Day 6–7	Channel P&L, SKU contribution margin, marketing ROI	CFO + analyst
Day 8–10	Variance commentary, narrative, notes page	CFO
Day 10–12	Reporting pack delivered + live walkthrough	CFO + founder

The reporting pack is 10–15 pages. Page one is the notes page—what does this all mean for you, what to do about it, what to watch. The remaining pages cover:

• Executive scorecard (top 6–8 KPIs vs forecast and prior period)
• P&L by channel with variance to budget and prior
• Contribution margin by SKU and category
• Marketing performance: spend, CAC, blended ROAS, channel-level ROAS, contribution margin after ads
• Cash position and 13-week forecast snapshot
• Inventory: weeks of supply, aging, turn, slow-movers flagged
• Working capital: AR aging, AP aging, cash conversion cycle
• Operational metrics: AOV, repeat purchase rate, returns rate
• Forecast roll: what changed in the model this month and why
• Action items from the prior month + new ones

The quarterly board pack

Quarterly the monthly pack expands into a board pack. Audience shifts from the founder to the board (or lead investors, or bank relationship managers). Narrative shifts from "what happened last month" to "where are we against plan and what do we do for the next 12 months."

The board pack adds:

• Annual plan tracking. Year-to-date actuals vs annual budget. Forecast for the rest of the year. Probability-weighted upside and downside.
• Scenario modelling. Two or three scenarios—base, downside, upside—with the assumptions that drive each.
• Capital plan. What capital is needed in the next 12–18 months. For inventory growth, for marketing, for hires, for any planned moves. Where it comes from (cash, debt, equity).
• Working capital deep-dive. Inventory turn trends, supplier terms, AP and AR cycles. The board cares more about cash conversion than month-on-month sales noise.
• Key risks and mitigations. Concentration risk (channel, customer, supplier), regulatory, FX, tax. Updated each quarter.
• Strategic decisions on the table. Anything requiring a board vote or board input—new market entry, hires above a threshold, debt covenants, equity rounds.

Board packs go out at least 48–72 hours before the meeting. The meeting itself is then for decisions, not for reading slides.

How does a fractional CFO measure success?

Three measures, in order of importance.

One: nine months of warning before any cash issue. If a brand hits a cash crunch and the CFO did not see it three quarters out, the CFO failed. Surprise is unacceptable.

Two: contribution margin clarity. The founder should know which SKUs and channels actually fund the business. At most $10M–$50M brands we engage with, a meaningful share of the SKU base runs below CM breakeven. Surfacing and acting on that is typically worth 3–8 contribution margin points in the first 6 months.

Three: faster, more confident decisions. The founder stops asking "should I do this" and starts asking "when." Capital allocation, hiring, inventory commitments, ad budgets—all get made faster because the model and cadence remove guesswork. Revenue growth, margin expansion, and fundraising readiness are downstream.

An anonymized $20M+ DTC case

Anonymized engagement. $23M DTC consumer-products brand, multi-channel (Shopify primary, Amazon secondary, wholesale ~15%), profitable on a P&L basis but cash-tight. The brand had a public-practice bookkeeper handling close and a founder running finance herself in the gaps.

Days 1–30: cash audit revealed the brand was running on ~6 weeks of operating cash, not the 4–5 months the founder believed. The mismatch was a large summer inventory order committed but not modelled into the cash forecast. The 13-week rolling forecast made the gap visible.

Days 31–60: SKU CM work surfaced 14 SKUs running below breakeven after ads, freight, and returns—11% of revenue, absorbing margin from the rest of the catalogue. Marketing had been over-spending on those SKUs based on top-line ROAS. We pulled spend, repriced two, discontinued four.

Days 61–90: rolling forecast and monthly pack live. The founder ran her first proper board-style call at day 84 with a clean pack and a clear ask. CM lifted 4.2 points over 90 days; cash recovered to a healthy 4-month buffer; the brand secured a $1.5M inventory line because the lender had a credible 13-week and 12-month forecast to underwrite against. Engagement continued at 1.5 days per week BAU from day 91.

When should a brand expect ROI from a fractional CFO?

Honest answer: weeks 1–2 feel like work for the founder, not value. The CFO is asking questions, getting access, requesting data.

Weeks 3–4 the value shows up. "By week three, week four, we will tend to start adding value. Then you'll be like, okay, these guys know what they're talking about." The first cash forecast lands. The first SKU CM pass surfaces something uncomfortable. The first scenario model gets debated.

Weeks 5–8 the model is built, the cadence is in, and decisions happen differently. Weeks 9–12 the board pack lands and the BAU rhythm takes over. Most brands report the engagement paid for itself within the first 6 months on margin alone—before counting fundraising or avoided cash crunches.

Why Eightx is different from a typical fractional CFO

"I only hire industry people, so I don't hire accountants from an accounting firm to be CFOs. I don't think that's fair. So one of my guys was a CFO for a billion dollar hotel chain. The other was a CFO for a hundred million dollar mine, or head of finance. Another guy was CFO for a 10 company E-com group in Australia. And then our analysts come from anywhere—but we train them."

Three differentiators that show up in every engagement:

• Partner-led. A senior partner sits in the seat at every brand. Analysts support the work; they do not run it.
• Ecommerce specialist. Channel reconciliation, marketplace fees, ad-spend gating, inventory cash dynamics, returns rate accounting—these are not generic CFO problems. They are ecommerce problems that take years of pattern-matching to do well.
• "Unlimited time" engagement model. "We are more involved than most other fractional statements—we more or less have like an unlimited amount of time that we'll spend working on someone's account. So we're involved in making sure the accounting is working, making sure taxes are filed, doing planning, forecasting, cash flow planning, and then based on what we see we're going—'well, your costs for this category are out of line, here's what we do about it.'"

If you want a deeper read on what a fractional CFO costs and why pricing varies so much across the market, see our fractional CFO cost guide. For the ecommerce-specific service overview, see fractional CFO services for ecommerce. For the engagement page itself, including how we structure the 90-day sprint, see our services. If your need is temporary coverage rather than an ongoing seat, look at our interim CFO service instead.

Frequently Asked Questions

What does a fractional CFO do day-to-day for an ecommerce brand?

A fractional CFO at an ecommerce brand runs a weekly operating cadence: Monday operations review, Tuesday cash review against the 13-week forecast, Wednesday board and reporting prep, Thursday team and department alignment, Friday rolling forecast update. Inside the month they own the close, deliver a 10 to 15 page reporting pack, run scenario planning, and sit as a standing member of the leadership team. The deliverable is decisions, not spreadsheets—what the numbers mean for the founder this week, this quarter, and this year.

How does a fractional CFO measure success?

Three things. First, 9 months of warning before any cash flow issue—if you do not see a cash crunch coming three quarters out, the CFO is failing. Second, contribution margin clarity at the SKU and channel level—which products and channels actually fund the business versus which ones absorb cash. Third, decisions made faster—the founder should be making capital allocation, hiring, and inventory decisions with confidence rather than gut. Revenue growth, margin expansion, and fundraising readiness fall out of those three.

When should a brand expect ROI from a fractional CFO?

The first 2 to 3 weeks of a 90-day sprint are spent asking what feel like dumb questions. By week 3 or week 4 the CFO starts adding real value—the founder begins to feel that the team understands the business. By the end of week 8 or 9, there is a first-year budget and a multi-year forecast. ROI typically appears in the form of margin lift (3 to 8 contribution margin points from SKU and channel cleanup), avoided cash crunches, and decisions made earlier than they otherwise would have been.

What deliverables does a fractional CFO produce each month?

A monthly reporting pack of 10 to 15 pages. The first page is always a notes page—what these numbers mean for the founder this month, what to do about it, and what to watch. Inside the pack: P&L by channel (Shopify, Amazon, wholesale), unit economics by SKU and category, contribution margin after fees and shipping and ads, updated 13-week cash forecast, inventory aging and reorder timing, marketing ROI by channel, and variance commentary against the rolling forecast. The pack is delivered with a live walkthrough so decisions get made on the call.

How is a fractional CFO different from a bookkeeper or controller?

A bookkeeper records transactions. A controller closes the books and ensures the financial statements are accurate. A fractional CFO interprets the numbers and runs strategy off them—cash forecasting, scenario modelling, capital allocation, board reporting, fundraising, and decisions about what to do next. At Eightx we only hire CFOs who have held live head-of-finance seats in operating companies, not public-practice accountants who relabelled. The work is operator-grade, not advisory.