The Eighteen Months Before You File: An IPO Readiness Timeline

Every case study in our IPO coverage is about what happens once a company is in the market. This one is about the part nobody writes up, because it is unglamorous and it is where listings actually get delayed: the eighteen months before anything is filed.

The decision to go public takes an afternoon. Becoming able to go public takes considerably longer, and almost none of the blocking work involves bankers. It involves auditors, controllers, counsel, and a large amount of retrospective tidying that would have cost almost nothing to do properly at the time.

What follows is a working timeline. Treat the months as indicative — companies vary enormously — but treat the order as fairly fixed, because the dependencies are real.

T‑18 months: The Audit Is the Long Pole

Start here, because this is the item that cannot be compressed by spending more money.

A registration statement requires audited financial statements prepared to the standards applicable to public companies — generally two or three years depending on whether you qualify as an emerging growth company, a category with a revenue threshold that is periodically adjusted and which permits reduced disclosure for a limited period after listing.

The trap is not the requirement. It is the standard.

Many private companies have been audited for years by a perfectly competent firm, to standards appropriate for a private company. Those audits may not satisfy the requirements for a registration statement. If they do not, the prior years must be re-audited — and you cannot re-audit a year that has passed any faster than the work takes.

What to do now:

• Ask your auditor directly whether your existing audits would support a registration statement, and get the answer in writing.
• If the answer is no, decide whether to change firms and re-audit — and understand this decision alone can move a listing by a year.
• Resolve any open technical accounting questions, particularly revenue recognition, before they become restatement candidates.
• If your accounting has been handled by a generalist provider, this is the point to establish whether you need a different level of capability — our guide to choosing a startup CPA covers the questions.

T‑18 to T‑12: Financial Reporting Capability

Public companies report on a fixed calendar to a fixed standard, and the operational capability to do that is built, not bought.

• Close cycle. A private company closing its books in three or four weeks cannot meet public filing deadlines. The target is a matter of days, and getting there takes iterations rather than a decision.
• Technical accounting. Revenue recognition, stock compensation, leases, and any area where your treatment is unusual. Each needs a documented position that will withstand review.
• People. A CFO who has been through a listing, a controller who has operated under public reporting, and eventually an investor relations function. These are competitive hires with long lead times. A fractional CFO can bridge the gap but is not the end state.
• Systems. Whatever runs on spreadsheets and institutional memory today becomes an audit finding later.

The honest test: could you produce complete, accurate, reviewed quarterly financials on a deadline, four quarters in a row, without heroics? If not, that is the gap, and it takes about a year to close.

T‑12 months: Internal Controls

Public companies must maintain and assess internal control over financial reporting. Management's assessment is required; an external auditor attestation is required too, though newly public and smaller companies have phase-ins and exemptions that defer it.

The exemptions matter less than founders hope, because the underlying controls have to exist regardless — the relief is about who has to opine on them, not about whether you need them.

Practically this means documented processes, segregation of duties, approval workflows, and evidence that the controls operated rather than merely existed. In a company that has been moving fast, this is genuinely disruptive work and it is chronically underestimated.

T‑12 months: Board and Governance

Start recruiting directors now. This is the item most often left until the bankers raise it, and it is the one with the least compressible timeline.

• Independent directors. Exchanges require a majority-independent board, with phase-in periods after listing. Finding the right people, getting them comfortable, and completing their own diligence takes months per person.
• An audit committee of independent directors, including at least one qualifying as a financial expert. That specific profile is in demand and scarce.
• Compensation and nominating committees, with charters.
• Board hygiene. Minutes that actually record decisions. Every consent properly executed. Every option grant approved before it was communicated.

That last point recurs in diligence more than any other governance failure. Our guide to boards and governance covers building this deliberately rather than retrospectively.

And the lesson of the WeWork filing applies with full force here: any control provision, related-party arrangement or unusual structure will be read by people whose profession is finding exactly those things. Fix what cannot be defended in a sentence while you still have the option.

T‑9 months: Cap Table and Legal Hygiene

This is where the actual landmines are, and every item is fixable cheaply now and expensively later.

• Share reconciliation. Your cap table must tie exactly to your stock ledger and your accounting. Discrepancies are common and take weeks to resolve — see our comparison of cap table platforms for keeping this clean continuously.
• Option grant defects. Grants made without board approval, before a valuation, or communicated at a price different from the one recorded. Each requires remediation and may carry a tax consequence for the holder.
• 409A history. A defensible series of valuations with no unexplained gaps. Weak or missing valuations create compensation expense questions and employee tax exposure — our guide to choosing a 409A provider covers what makes one defensible.
• IP assignments. Every founder, employee and contractor who touched the product. A single early contractor without an assignment can hold up a transaction, as it does in M&A.
• Contractor classification and any accumulated payroll tax exposure.
• Sales tax nexus. Multi-state exposure that has been quietly accruing.
• Material contracts. Change-of-control provisions, exclusivity, most-favoured-nation clauses and anything that must be disclosed or consented.
• Securities compliance for every historical financing round. Each private issuance needed an available exemption; gaps create rescission risk.

Assemble this into a data room and have counsel review it as though they were on the other side. The discipline is identical to the one in our guide to preparing for investor diligence, at higher stakes and with less forgiveness.

T‑6 months: The Machinery

• Counsel. Securities counsel with genuine registration experience, which is a different specialism from the corporate work you have been buying — see choosing a law firm.
• Underwriters. The organisational meeting, syndicate structure and fee negotiation. Our guide to how investment banks work covers what you are actually buying, and our Snowflake analysis covers whose interests the pricing process serves.
• Transfer agent and equity administration — a public-company-capable provider, which is not always your current one. See who does what.
• D&O insurance. Public company coverage is a different product at a materially different price, and the market for it should be approached early rather than in the final weeks — our guide to startup insurance explains why.
• Filing infrastructure — EDGAR access codes, a financial printer, XBRL tagging capability.
• Confidential submission. Most companies now submit a draft registration statement confidentially and resolve comments before anything becomes public. Use it. It converts the most dangerous phase into a private one.

T‑3 months: Communications Discipline

Once you are in registration, what anyone at your company says publicly becomes a legal matter.

• Gun-jumping. Promotional statements before or during registration can create serious problems, including delay.
• Consistency. Any public claim that differs from the registration statement is a discrepancy someone will find.
• One voice. Everyone routes external communication through a single controlled channel, with no exceptions for enthusiasm.

The Facebook listing is the cautionary case. The most damaging failure there was informational — revised estimates reaching institutional accounts but not retail buyers — and it produced years of litigation and regulatory action. Assume every verbal qualification given to a favoured investor will eventually be reconstructed in discovery.

The Costs Nobody Budgets

The underwriting spread is the visible cost and frequently not the largest one.

• Audit fees rise substantially and stay risen.
• Legal fees for the registration process, then ongoing.
• Financial printer and XBRL — a real recurring line.
• D&O premiums, frequently a multiple of private-company cost.
• Headcount — controller, technical accounting, SEC reporting, internal audit, investor relations. This is permanent operating expense.
• Executive time. Your CEO and CFO will spend a large share of a year on this, which is a genuine cost to the business that never appears on any schedule.

Companies that model only the spread are surprised twice: once by the transaction cost, and again by the permanent increase in run-rate that follows.

Frequently Asked Questions

Can we compress eighteen months?

Partly. Governance recruitment, controls documentation and cap table remediation can be run in parallel and accelerated with resources. The audit cannot. If prior years need re-auditing, that is a hard constraint no amount of money removes — which is why it is the first item on this list.

When should we hire a public-company CFO?

Earlier than feels comfortable — twelve to eighteen months before filing is common, and the search itself takes months. Someone who has done it before will identify problems in weeks that would otherwise surface in diligence. If the timing or budget does not work yet, a fractional or advisory arrangement is a reasonable bridge, but the permanent hire is not optional.

Do we need all of this if we might get acquired instead?

Nearly all of it, which is the strongest argument for doing it. Audit quality, cap table integrity, IP assignments, contractor classification and 409A history are exactly the findings that reduce price in an acquisition. Readiness work is not a bet on listing — it improves every exit path and strengthens private financings too.

What about a direct listing or a SPAC — is the preparation lighter?

Less than you would hope. A direct listing still requires a registration statement and full financial preparation — and removes the underwriter who would otherwise have pressure-tested your disclosure. For SPACs, the 2024 rule changes moved liability substantially closer to a conventional IPO. The route that was genuinely lighter on scrutiny has largely been closed.

How early should we talk to bankers?

Earlier for advice than for mandate. Most will meet a promising company years ahead and tell you candidly what is missing, at no cost, because they want the relationship. Take that input while it is free and non-binding. What you should not do is let the banking timetable drive readiness work — the sequence in this article is driven by dependencies, not by a window.

What is the single most common cause of delay?

Financial statements — either an audit that has to be redone, or a technical accounting position that does not survive review. Governance and cap table issues are more numerous but more fixable. Accounting problems move dates.

The Bottom Line

Very little of what blocks a listing is commercial. It is defective option grants, a share count that will not reconcile, a contractor who never signed an assignment, a close cycle measured in weeks, and an audit performed to the wrong standard.

Every one of those was cheap to prevent and expensive to remediate, and the remediation happens at exactly the moment your attention is worth the most.

Start with the audit question, because it is the only item on this list that a deadline cannot move.

Global Capital Network connects founders with the auditors, counsel, valuation providers, bankers and directors who do this work — and with investors who back companies that are ready. See upcoming events or get in touch.

Accurate as at 2 August 2026. Requirements vary by exchange, company size and filer status, and thresholds are periodically adjusted. This article is general information, not legal, accounting or securities advice — work with qualified securities counsel and auditors on your own position.