A cap table is the single source of truth for who owns what in your company, and the first priority is keeping it accurate and reconciled with statutory records. It should match your filings with Companies House and your employment related securities reporting at all times, not just when an investor asks to see it. Guidance from the British Business Bank treats this record as essential to fundraising even though it carries no statutory weight of its own, and firms such as Price & Accountants exist precisely to help founders keep the two in sync.

TL;DR:

  • Maintaining an accurate cap table involves tracking both authorized and issued shares, share classes, options, and convertible instruments to reflect potential dilution.
  • Conflicting records between your cap table and statutory filings can delay funding rounds and lead to valuation disputes, making reconciliation crucial.
  • Regular reconciliation with Companies House and timely updates on share transfers, option grants, and PSC thresholds prevent compliance issues and penalties.
  • Use specialist software instead of spreadsheets when share classes or shareholders grow, and assign a single responsible person to oversee all updates.
  • Engaging professional advisers before major milestones ensures the cap table’s accuracy, compliance with deadlines, and readiness for fundraising or EMI schemes.
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Table of Contents

What a cap table contains: share classes, options and convertibles

Your cap table needs to separate authorised share capital (the total shares your company could issue) from issued share capital (what has actually been allotted). Many founders conflate the two and then struggle to explain the gap to an investor.

Share classes matter as much as the numbers. Ordinary shares, preference shares and founder shares with different voting or liquidation rights all need their own column, because a buyer or investor will want to know exactly what each class is entitled to before money changes hands.

Options and vesting schedules add another layer. An option grant typically does not appear as issued shares until it is exercised, but a properly maintained cap table still tracks it so you can see the fully diluted picture at any point.

Convertible instruments, such as advance subscription agreements or convertible loan notes, should be modelled for their potential conversion into shares, because they represent future dilution that investors will factor into their own calculations.

Why cap table management matters for fundraising and control

Investors treat a messy cap table as a warning sign. During due diligence, they expect a clean audit trail showing who holds what, when it changed and why, and any gap between your records and your Companies House filings tends to slow a deal down rather than kill it outright, which is often worse.

Option pool sizing is one of the most contested points in a term sheet. Many venture investors prefer the pool to be created before their money arrives, so the dilution falls on existing shareholders rather than on the new investment, a point the British Business Bank raises directly when discussing how much equity to offer.

  1. Some funds grow uneasy when less than 60% of a company’s equity remains with the business before they invest, according to British Business Bank guidance, so founders should model pool size and pre-round dilution well before a term sheet lands.
  2. Dilution compounds across rounds: a founder who holds 60% before a seed round and takes on a 20% investor stake plus a 10% option pool ends that round holding a smaller share of a larger pie, and the same arithmetic repeats at every subsequent raise.
  3. Disputes over who holds what, or over which class carries which rights, surface most often when records have been patched together informally rather than updated at each transaction.
  4. A cap table that does not reconcile with statutory filings can delay a round by weeks while lawyers and accountants chase down the discrepancy, and in the worst cases it reopens negotiations on valuation.

UK filing and compliance touchpoints for your cap table

Your cap table interacts with several statutory obligations, and the biggest risk is letting them drift out of sync with each other.

The confirmation statement, filed on form CS01, updates your company’s statement of capital and shareholder information at Companies House at least once a year. Before filing, check that every share allotment, transfer and class change on your cap table is reflected in that statement, because GOV.UK guidance on filing your confirmation statement makes clear that the statement of capital and shareholder information must be accurate at the point of submission.

Records aligned across UK company filings

People with significant control (PSCs) also need updating whenever a shareholding crosses the relevant thresholds, since this feeds a public register that investors and lenders check as a matter of course.

For the 2025 to 2026 tax year, the end-of-year ERS return and EMI notifications have a fixed submission deadline in early July 2026, and late returns trigger automatic penalties, according to GOV.UK’s employment related securities bulletin 65. Missing this date is one of the most avoidable compliance failures a growing company can make, because the deadline is fixed and well publicised in advance.

A short reconciliation checklist before any filing:

How to maintain your cap table without losing control of it

Cap tables fall apart when nobody is clearly responsible for them. Assign ownership early, whether that is a founder, a finance lead or an outsourced adviser, and make sure that person signs off on every change before it goes live.

  1. Record every equity event the day it happens: a new allotment, a transfer, an option grant or exercise, and a convertible note conversion.
  2. Keep a dated transaction log alongside the cap table itself, so anyone reviewing it can trace a current figure back to the document that created it.
  3. Reflect vesting schedules precisely: unvested options should be visible but clearly marked as not yet exercisable, so the fully diluted and currently issued pictures never get confused.
  4. Reconcile the cap table against your accounting records and Companies House filings on a fixed monthly or quarterly rhythm rather than only before a fundraise.
  5. Move from a spreadsheet to specialist software once the number of shareholders, option holders or share classes makes manual reconciliation error-prone.

Pro Tip: Lock historical rows in your spreadsheet once a transaction is filed, and add new ones only at the bottom, so nobody can quietly edit a past allotment.

If you are still using Excel or Google Sheets, separate the “current state” tab from the “transaction history” tab, protect formulas with cell locking, and keep a single master version rather than emailed copies that drift apart. When you do hand records to an adviser, give them the full transaction history, not just the latest snapshot, since that is what lets them reconcile quickly against your statutory filings.

Choosing tools: categories and features that cut risk

Most UK companies start on a spreadsheet, and that is genuinely fine at seed stage with a handful of shareholders and a simple option pool. The signals to watch for a migration are growing numbers of option holders, multiple share classes, or investors asking for a live, auditable view rather than a static document.

Beyond spreadsheets, two broad categories exist: specialist cap table platforms built purely for equity tracking and scenario modelling, and accounting or HR systems with an equity module bolted on. Neither category is inherently better; the right choice depends on how much of your existing financial workflow you want the tool to touch.

Pilot any new tool against a copy of your existing data before switching over fully, and keep your spreadsheet as a fallback until the migration has been checked by whoever manages your books. Some founders also look at automation across their wider finance stack; a partner guide to AI tools for startups covers broader workflow automation that can sit alongside cap table software rather than replace it.

How professional advisers add value on cap tables and EMI compliance

Bringing in an adviser makes most sense at three points: setting up your share structure pre-seed, immediately before taking on investment, and before implementing an EMI scheme. A typical engagement with Price & Accountants produces a reconciled cap table, a filings checklist covering Companies House and ERS/EMI deadlines, documented option grants, and a review of SEIS/EIS readiness where relevant.

We build these checks into routine advisory work rather than treating them as a one-off fire drill.

Why founders leave this until it is too late

The founders who get into trouble are rarely the ones with complicated cap tables. They are the ones who never assigned clear ownership of the document, so three different versions circulate by the time an investor asks for it. I have seen funding rounds slip by weeks while lawyers reconcile a spreadsheet against Companies House filings that nobody had touched in a year.

The fix is not sophisticated: assign one owner, reconcile against Companies House every quarter, and document every option grant the day it happens. None of that requires software, just discipline applied early.

— Rahamut

How Price & Accountants can help with your cap table now

We work with UK tech and fintech founders on exactly the problems this guide covers: reconciling cap tables against Companies House filings, structuring SEIS/EIS-compliant share allocations, and setting up EMI schemes that meet ERS deadlines without last-minute panic. A first engagement typically starts with a cap table health check and a filings calendar built around your company’s specific deadlines.

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Our cap table management service sets out how we approach this work in more detail, and our broader services overview covers bookkeeping, R&D tax credits and outsourced finance director support that often sit alongside it. Plans start with our Core Services package at £249 per month, with Blue Plan at £549 per month and Black Plan from £1,999 per month for companies needing deeper strategic advisory support, all listed on our pricing page. Get in touch to book a cap table review before your next filing deadline or funding conversation.

FAQ

What is a cap table and why does it matter?

A cap table is a record of who owns shares, options and convertible instruments in your company, including share classes and rights attached to each. It is not a statutory document, but the British Business Bank treats it as essential for fundraising, dilution tracking and investor due diligence.

Who should own and update the cap table?

Responsibility usually sits with a founder, a finance lead or an outsourced adviser, and the key requirement is that one person signs off on every change. Spreading edits across multiple people without a single owner is the most common cause of records drifting out of sync with Companies House.

What are the ERS and EMI filing deadlines I need to know?

For the 2025 to 2026 tax year, the end-of-year ERS return and EMI notifications must be submitted by 6 July 2026, and late returns trigger automatic penalties according to GOV.UK. Missing this date is avoidable with a calendar reminder set well ahead of the deadline.

How often should I reconcile my cap table with Companies House?

A monthly or quarterly reconciliation rhythm catches discrepancies before they become a problem at filing time or during investor due diligence. At minimum, check the cap table against your records before every confirmation statement, since Companies House guidance requires the statement of capital to be accurate at the point of submission.

When should I move from a spreadsheet to specialist software?

A spreadsheet is usually adequate at seed stage with a small number of shareholders and a simple option pool. The signals to migrate are a growing number of option holders, multiple share classes, or investors asking for a live, auditable record rather than a static document.

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