AS | Ankit Sarawagi|Founder, CFOmatrix·June 2026·12 min read | Updated Jun 2026 |
- The finance function evolves in three clear layers: a founder plus an accountant at seed, a controller plus a fractional CFO at Series A, a full-time CFO plus a small team at Series B.
- Each stage has a different deliverable: clean books and runway at seed, a board pack and a credible model at Series A, FP&A and controls at Series B.
- Each stage also has a different top risk: running out of cash blind at seed, a weak board pack at Series A, control gaps and leakage at Series B.
- Add tools to remove a real bottleneck, not to look mature. Spreadsheets are fine far longer than founders expect.
- The governing principle: build in layers, and match the seniority of the hire to the problem you actually have right now.
| Seed Founder plus an outsourced accountant: clean books and runway | Series A First controller, plus a fractional CFO for the board and the raise | Series B Full-time CFO plus a small team: FP&A, controls, capital allocation |
We will follow one company at every stage: Brewly, a D2C coffee brand growing from ₹3 crore to ₹60 crore in revenue, seed to Series B, and from 8 to 80 people. At each step you will see exactly who runs Brewly’s finance, what they produce, and what could go wrong.
Why the Finance Function Grows in Layers
The most useful way to think about the startup finance function by stage is as a building, not a single room. You do not knock the whole thing down and rebuild it at each round. You add a floor when the floor below it is full.
At seed, all you really need is someone to keep the records straight and tell you how much cash is left. At Series A, the work of producing accurate numbers and the work of deciding what to do with them split into two jobs, so you add a controller underneath and senior judgement on top. At Series B, finance becomes a daily strategic function with its own small team. Each layer sits on the one before it.
This matters because the most expensive mistakes happen when founders skip a layer or add the wrong one: hiring a full-time CFO to keep books, or asking a junior accountant to build the model for a Series A raise. The right structure at each stage is specific, and it changes faster than most teams expect.
Stage labels (seed, Series A, Series B) are a useful shorthand, but the real trigger is the work, not the funding round. A bootstrapped company at ₹15 crore needs the Series A finance structure even if it never raised a Series A. Read the stages below as descriptions of the workload, not the cap table.
Seed Stage: Founder Plus an Outsourced Accountant
At seed, Brewly is doing about ₹3 crore in revenue with 8 people. There is no finance team and there should not be one yet. Finance is a part of the founder’s week, supported by an outsourced accountant or a part-time bookkeeper.
Who runs finance
The founder owns finance directly: watching the bank balance, approving payments, and tracking how many months of cash are left. An outsourced accountant (often a local CA firm on a small monthly fee) keeps the books in order and handles GST returns, TDS deposits and the basic statutory calendar. There is no controller and no CFO.
Key deliverables
- Clean books in accounting software, reconciled to the bank every month.
- A simple monthly MIS: revenue, gross margin, burn and cash in bank, on one or two pages.
- A runway number the founder can state from memory: months of cash left at the current burn.
- On-time GST, TDS and MCA filings so nothing compounds into a penalty or a problem at the next raise.
Tools
Accounting software (Zoho Books, Tally or similar) plus spreadsheets is genuinely enough at this stage. A founder who can read a bank statement and maintain one honest cash sheet is in good shape. Resist buying anything heavier.
Running out of cash without warning because nobody owns the forecast. The accountant records the past; no one is projecting the future. The second risk is messy books that quietly accumulate, then cost weeks of clean-up during the Series A diligence. Both are cheap to prevent now and expensive to fix later.
For Brewly, the seed-stage finance job is small but non-negotiable: never be surprised by the cash position, and keep the records clean enough that the next raise is not slowed down by a bookkeeping mess. That is the whole brief. Deciding who does this first piece of work is exactly what our guide on your first finance hire covers in detail.
Series A: A Controller Plus a Fractional CFO
By Series A, Brewly is at roughly ₹15 crore in revenue with around 30 people. The founder can no longer keep finance reliable on the side, and the company is about to face investor scrutiny. This is where the function splits in two.
Who runs finance
The first full-time finance hire arrives: a financial controller (or finance manager) who owns the accuracy and timeliness of the numbers, the month-end close, payroll and compliance. On top of that, most companies add a fractional CFO: senior judgement for the board pack, the financial model and the raise, without the cost of a full-time CFO. The accountant from the seed stage may stay on underneath the controller, or fold into the new hire’s scope.
Key deliverables
- A proper board reporting pack: actuals versus plan, cohort and unit economics, cash and runway, and the headline risks.
- A defensible financial model that survives investor questions in a Series A process.
- A reliable monthly MIS produced on a calendar, not when someone gets to it.
- A clean data room for diligence: books, contracts, cap table, compliance history.
Tools
On top of accounting software, Brewly adds payroll software, an expense and reimbursement tool, and a more structured MIS (often still a well-built spreadsheet, sometimes a light reporting tool). If the Series A was a priced round, cap-table software starts to earn its place. The aim is to remove manual bottlenecks around the close and reporting, which our finance tech stack guide walks through tool by tool.
The controller and the fractional CFO are a deliberate pair, not a redundancy. The controller makes the numbers true; the fractional CFO makes them useful. Hire one without the other and you get either accurate books no one can act on, or strategy that never gets implemented because there is no one to run the close.
A weak board pack and a model that falls apart under investor questions. At this stage the cost of a poor reporting pack is not just an awkward board meeting; it can slow or sink the raise itself. The growing compliance load (payroll across more states, higher GST and TDS volume) is the quieter second risk.
Series B: A Full-Time CFO Plus a Small Team
At Series B, Brewly is around ₹60 crore in revenue with about 80 people. Finance is now a daily strategic function, and the fractional model has run its course. This is when a full-time CFO becomes worth the cost.
Who runs finance
A full-time CFO leads a small but complete team: typically a controller or financial-reporting lead, one or two accountants or analysts, and often an FP&A or finance-operations person. The CFO owns planning, capital allocation, fundraising and the board relationship; the team owns execution. The fractional CFO who carried the company through Series A often hands over to the full-time hire here.
Key deliverables
- A live FP&A function: the annual operating plan, rolling forecasts, and variance analysis that drives decisions.
- Financial controls that prevent revenue leakage, fraud and unauthorised spend before they bite.
- A fast, reliable month-end close, with numbers ready in days, not weeks.
- Capital allocation discipline: where the next rupee of growth spend goes, and what return it has to earn.
Tools
Brewly now adds proper FP&A and reporting systems, billing or subscription tooling if the model needs it, and tighter integrations between accounting, payroll and reporting so the close does not depend on manual stitching. The reporting cadence the CFO installs here is the subject of our monthly MIS and management reporting guide.
The failure mode shifts from “no numbers” to “the numbers hide problems.” Control gaps, revenue leakage and a slow close mean issues surface only after they are expensive. At ₹60 crore a one percent leakage is ₹60 lakh a year. Building the controls that catch this is covered in our financial controls guide.
The Finance Function by Stage: Comparison Table
Here is the whole picture for Brewly on one page. Each row is a dimension of the finance function; each column is a stage. Read across any row to see how that dimension changes as the company scales.
| Seed | Series A | Series B | |
|---|---|---|---|
| Revenue | ~₹3 cr | ~₹15 cr | ~₹60 cr |
| Team | 8 people | ~30 people | ~80 people |
| Who runs finance | Founder + outsourced accountant | Controller + fractional CFO | Full-time CFO + small team |
| Key deliverable | Clean books, basic MIS, runway | Board pack, model, raise support | FP&A, controls, capital allocation |
| Tools | Accounting software + spreadsheets | + payroll, expense, MIS tools | + FP&A and reporting systems |
| Top risk | Running out of cash blind | Weak board pack, fragile model | Control gaps, revenue leakage |
Notice that the seniority of the people, the sophistication of the deliverables and the weight of the tools all rise together, one notch at a time. Skipping a stage in any single row tends to create a gap that shows up later as a fire drill.
The Two Mistakes Founders Make
Almost every finance-function misstep we see is a version of one of two errors. Both come from mis-reading which layer the company actually needs.
Mistake 1: Hiring too senior, too early
A seed-stage founder hires a full-time CFO at ₹50 lakh-plus all-in to do work that an accountant and a part-time bookkeeper could handle. The CFO is bored, the cash burns faster, and the actual job (clean books, runway) is over-engineered. Seniority is not a substitute for the right-sized task.
Mistake 2: Hiring too junior, too long
The opposite, and more common: a company at ₹15 crore still runs finance through a junior accountant and the founder’s spare evenings. The books are fine, but no one can build the model or hold a board conversation, and the Series A raise stalls because the pack is weak. The company needed senior judgement (fractional is fine) months ago.
Accuracy is a junior or mid-level job. Judgement is a senior one. Pay junior rates for keeping the numbers true, and senior rates only for deciding what to do with them. The fractional model exists precisely so you can buy judgement without buying a full-time seat.
The Principle: Build in Layers, Match Seniority to the Problem
If you remember one thing from this guide, make it this. The startup finance function should be built in layers, and the seniority of each hire should match the problem in front of you, not the stage you wish you were at.
Practically, that means three habits. First, name the actual problem before you hire (is it accuracy, or judgement, or capacity?). Second, add the cheapest layer that solves it (an accountant, a tool, a controller, a fractional CFO) before reaching for the most expensive one. Third, revisit the structure every time you raise or double revenue, because what was right last year is usually a notch behind by now.
“You do not build a finance function once. You add a floor each time the one below it fills up. The skill is knowing which floor you actually need next, and not paying for the one above it.”
Ankit Sarawagi, CFOmatrixFor the bigger picture of how the CFO role fits across all of this, including full-time versus fractional versus virtual models and what each costs, see our complete guide to the virtual and fractional CFO for startups.
Frequently Asked Questions
How does a startup finance function change from seed to Series B?
The startup finance function evolves in layers. At seed it is the founder plus an outsourced accountant focused on clean books and runway. At Series A you add a financial controller and usually a fractional CFO, so the function can produce a real board pack and support a raise. At Series B you bring in a full-time CFO with a small team, and finance becomes a daily strategic function covering FP&A, controls and capital allocation. The rule of thumb is to build in layers and match the seniority of the hire to the actual problem.
Who runs finance in an early-stage startup?
At the seed stage finance is usually run by a founder, supported by an outsourced accountant or a part-time bookkeeper who handles the books, GST and TDS filings. There is rarely a dedicated finance hire at this point. The founder watches the bank balance and runway directly, and the accountant keeps the records compliant. A dedicated controller typically arrives around Series A.
When should a startup hire a financial controller?
Most Indian startups hire their first full-time finance person, usually a controller or a finance manager, around Series A, when revenue is roughly in the ₹10 crore to ₹20 crore range and the team has grown past 25 to 30 people. The trigger is that the founder can no longer keep books, payroll, compliance and the monthly MIS reliable on the side. A controller owns accuracy and the close, freeing the founder and any fractional CFO to focus on planning.
What finance tools does a startup need at each stage?
At seed, accounting software (such as Zoho Books or Tally) plus spreadsheets are enough. At Series A you add payroll software, an expense and reimbursement tool, and a more structured MIS, with cap-table software if you have run a priced round. At Series B you add proper FP&A and reporting systems, billing or subscription tooling, and tighter integrations so the month-end close is fast and reliable. Add tools to remove a real bottleneck, not to look mature.
What are the biggest finance risks at each startup stage?
At seed the top risk is running out of cash without warning because no one owns the forecast, plus messy books that slow the next raise. At Series A the risk is a weak board pack and a model that does not survive investor scrutiny, plus a growing compliance load. At Series B the risk shifts to control gaps, revenue leakage and slow reporting that hides problems until they are expensive. Each stage has a different failure mode, which is why the function has to evolve.
Do you need a CFO at the seed stage?
Most seed-stage startups do not need a full-time CFO. They need clean books, a simple monthly MIS and someone watching runway, which a founder plus an outsourced accountant can deliver. CFO-level judgement becomes worth paying for around Series A, and it is usually cheaper to start with a fractional CFO than to make a full-time hire before the work justifies it.
How big should a startup finance team be at Series B?
At Series B, with revenue around ₹50 crore to ₹80 crore and roughly 80 people, a typical finance team is small but complete: a full-time CFO, a controller or financial-reporting lead, one or two accountants or analysts, and often an FP&A or finance-ops person. The exact shape depends on the business model, but the goal is a function that produces reliable numbers and forward plans without depending on any single person.
Revenue, team and cost figures are illustrative market guidance for India as of 2026 and vary by sector, business model and city. This is general information, not financial or legal advice. Speak to a qualified adviser about your specific situation.
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AS | Founder, CFOmatrix | Finance Strategy & Equity Compliance CFOmatrix is a knowledge platform focused on how finance actually works inside growing companies. Every insight is shaped by real operating experience across startups and growth-stage companies, including cross-border setups. |