What Is Paid-Up Capital? A Guide for UK Companies and Startups

If you’re running (or launching) a UK company, you’ll quickly come across “share capital” terms that sound similar but mean very different things. One that often trips founders up is paid-up capital.

It’s easy to assume it’s just an accounting label - but paid-up capital can affect everything from how credible you look to investors, to what your shareholders actually own, to how you record your funding properly.

In this guide, we’ll break down what paid-up capital is, how it works in practice for UK companies, and what you should watch out for as your business grows.

What Is Paid-Up Capital?

Paid-up capital is the amount that shareholders have actually paid to the company for their shares.

In the UK, “paid-up capital” is often used to mean the amount paid up on the nominal value of issued shares (rather than the total cash received, which may also include share premium).

In plain terms:

• Issued share capital is the nominal value of shares the company has issued/allotted to shareholders.
• Paid-up capital is the amount shareholders have actually paid on those shares (whether in cash or non-cash consideration), up to the amount unpaid on the issue price.

So, when someone asks what paid-up capital is, the practical answer is:

It’s the portion of your issued share capital (and any issue price still due) that has actually been paid by shareholders.

A Simple Example

Let’s say your company issues 1,000 ordinary shares at £1 each to a founder.

• If the founder pays £1,000 into the company bank account, the company has £1,000 paid-up share capital.
• If the founder only pays £200 now and owes the remaining £800 later, the company has £200 paid-up share capital and £800 unpaid share capital (the shareholder still owes that money to the company).

This distinction matters more than most early-stage founders realise - because “unpaid” share capital can create legal and commercial headaches later on.

Does Paid-Up Capital Have To Be Cash?

Not always. Shares can be paid for with non-cash consideration (sometimes called “shares for value”), such as:

• transferring equipment or property to the company
• assigning intellectual property to the company

It’s also possible (in principle) to issue shares in exchange for services, but this can be difficult to document and value in practice, and companies often prefer a clearer structure (for example, paying for services separately and issuing shares for cash). Where shares are issued for non-cash consideration, you’ll want to document it properly, value it sensibly, and ensure your filings and internal records match what actually happened.

How Paid-Up Capital Works In Practice (And Why Founders Should Care)

Paid-up capital sounds technical, but it shows up in real business decisions surprisingly often.

1) It Impacts Your Company’s Financial Story

Paid-up capital can influence how your business looks on paper - especially if you’re talking to:

• investors
• lenders
• suppliers offering trade credit
• strategic partners

While many startups operate with low paid-up capital and rely on revenue or external funding, you still want your share and funding structure to look deliberate - not accidental.

2) Unpaid Share Capital Creates “Hidden” Liability For Shareholders

If shares are issued but not fully paid, the shareholder may still legally owe that unpaid amount to the company. That can become relevant if:

• the company is under financial stress
• there’s a dispute between founders
• a liquidator is appointed

In other words, “unpaid” doesn’t just disappear - it can become a real obligation.

3) It Helps Clarify What Funding Actually Is

One common early-stage issue is mixing up:

• money invested for shares (equity - recorded as share capital and, where applicable, share premium)
• money lent to the company (director loan / shareholder loan)
• money paid for goods or services (revenue)

Each of these can have different legal, tax and accounting implications. If you treat everything as “investment” without clarity, you can end up with mismatched records and awkward conversations later when someone asks, “So what exactly did I buy?”

Paid-Up Capital vs Share Capital Terms (Issued, Authorised, Called-Up, Share Premium)

To rank (and to make sense of your own cap table), it helps to get the terminology straight. Here’s how paid-up capital fits into the bigger picture.

Paid-Up Capital vs Issued Share Capital

• Issued share capital = the nominal value of shares that have been issued/allotted to shareholders.
• Paid-up capital = the amount shareholders have actually paid on those shares (which may be all, or only part, of what they owe).

Issued share capital can be higher than paid-up capital if shares are partly paid.

Paid-Up Capital vs Authorised Share Capital

Historically, some companies had an “authorised share capital” cap in their constitutional documents. Under the Companies Act 2006, companies generally have flexibility to issue shares (subject to their constitution and shareholder approvals), and “authorised share capital” is less central than it once was.

That said, your Articles of Association still matter because they set the rules for issuing shares, transferring shares, and shareholder rights.

Paid-Up Capital vs Called-Up Capital

Called-up capital is the amount the company has formally requested shareholders to pay on their shares.

In many startups, shares are issued as fully paid on day one, so called-up and paid-up capital end up being the same. But where shares are partly paid, the company can “call” for the unpaid portion to be paid later (if the terms allow).

Paid-Up Capital vs Share Premium

Most startups eventually issue shares at more than their nominal value (e.g. £0.0001 nominal value per share, but investors pay £1.00 per share). The extra amount is typically recorded as share premium.

Example:

• 10,000 shares issued
• nominal value £0.0001 each (so £1 nominal total)
• investor pays £10,000

In this example:

• Paid-up share capital (nominal) = £1 (the nominal amount paid on shares)
• Share premium = £9,999

From a practical perspective, both amounts are money the company has received for shares - but they are recorded separately and can be subject to different legal rules (for example, under capital maintenance and distribution rules).

Why Paid-Up Capital Matters For UK Companies And Startups

Paid-up capital isn’t just a definition to memorise. It can affect how you fundraise, how you manage risk, and how clean your corporate records are when opportunities come up.

It Can Influence Investor Confidence During Due Diligence

When you raise investment, investors will typically expect your company’s share history to be clear and properly documented. That usually includes:

• who received shares and when
• what price they paid (and whether it was paid)
• board/shareholder approvals
• Companies House filings for allotments where required

If you’re issuing shares to new investors, a properly drafted Share Subscription Agreement helps document the price, payment mechanics, warranties, and completion steps (so everyone’s on the same page from day one).

It Affects Your “Capital Structure” Choices

As you grow, you might fund your business using:

• equity (shares)
• convertible instruments
• straight debt

Each route changes your balance of control, dilution, and legal obligations. For instance, a Convertible Note can delay valuation discussions, but it still needs tight legal terms to avoid surprises later.

It Can Reduce Disputes Between Founders

Money and ownership are two of the biggest pressure points in early-stage businesses. If you and a co-founder have different understandings about what has been “paid” versus what is still owed (or what counts as a contribution), disputes can escalate fast.

A clear Shareholders Agreement can help set expectations about funding obligations, what happens if someone leaves, and how future shares are issued.

It Helps You Avoid Accidental “DIY” Mistakes That Cost Time Later

Founders often try to keep things simple by issuing a small number of shares and “sorting out the details later”. That’s understandable - you’re busy building.

But if your paid-up capital and share issuances aren’t cleanly recorded, fixing it later can mean:

• extra admin and legal fees
• delays in closing a funding round
• more complex shareholder consents and filings

Getting the legal foundations right early is usually the fastest path overall.

How Do You Set, Increase, Or Change Paid-Up Capital?

Paid-up capital changes when you issue shares and shareholders pay (in cash or value). What matters is that the process is done properly and matches your records.

1) Setting Paid-Up Capital When You First Form The Company

When you incorporate, you’ll choose an initial share structure (for example, 100 ordinary shares at £1 each). Many founders keep it simple at the start, then reorganise later if needed.

If you’re still at the formation stage, you might find it easier to get the structure right up front when you Register a Company, rather than untangling it later.

2) Increasing Paid-Up Capital By Issuing New Shares

If you want to increase paid-up capital, you usually do it by:

• issuing new shares to existing shareholders or new investors, and
• receiving payment for those shares

In a UK private company, you’ll generally need to consider:

• director authority to allot shares (and whether shareholder approval is required)
• pre-emption rights (existing shareholders’ rights to be offered shares first)
• proper board minutes/resolutions
• updating your statutory registers
• making relevant Companies House filings within required timeframes

Depending on your situation, a Directors Resolution can be part of documenting the allotment and keeping your internal governance tidy.

3) What If A Shareholder Doesn’t Pay For Their Shares?

If someone holds shares that are not fully paid:

• the company may have a right to demand payment (depending on the terms)
• the shareholder may have ongoing liability to pay the unpaid amount
• there may be restrictions on transferring those shares

This is one of those areas where the “easy” approach (issuing shares and leaving payment informal) can create big risks. If payment timing is going to be flexible, you’ll want this clearly documented.

4) Can You Reduce Paid-Up Capital?

Reducing share capital is possible, but it’s not something to do casually. In many cases, it involves a formal process and specific legal steps under the Companies Act 2006.

Founders usually encounter reductions when they are:

• cleaning up an old cap table before fundraising
• addressing historic losses
• restructuring the company for a sale or investment

Because the rules here can be technical (and consequences can be serious), it’s worth getting advice before you start making changes.

Common Paid-Up Capital Pitfalls (And How To Avoid Them)

Paid-up capital problems usually happen when companies move fast and documentation doesn’t keep up. Here are a few common traps - and the practical fixes.

Issuing Shares Without Clear Paperwork

If shares are allotted informally (for example, “we agreed over email”), you can run into issues proving:

• the number/class of shares issued
• the issue price
• whether and when payment was made
• what rights attach to those shares

Fixing this later can involve retroactive resolutions, confirmatory agreements, and sometimes uncomfortable conversations with early contributors.

Confusing Equity Investment With Loans

Sometimes a founder “puts money into the company” and assumes they’ve increased paid-up capital - but no shares were actually issued.

In that scenario, the money may be treated as a loan (often a director’s loan) unless it’s properly structured as an equity subscription. If you’re unsure, it’s better to clarify early rather than leaving the company with unclear liabilities on its balance sheet.

Forgetting That Your Constitution Controls The Rules

Your company’s constitution (including your Articles) can include rules about:

• different share classes
• share transfers
• pre-emption rights
• decision-making thresholds

So if you’re planning to bring in a new shareholder, it’s not just about “agreeing a price”. You need to ensure the issue and payment mechanics align with your constitution and any shareholder arrangements already in place.

Share Transfers That Don’t Match The Records

Paid-up capital usually changes when shares are issued and paid for - not when shares are transferred between shareholders. But transfers still need to be recorded properly, and a clean paper trail matters for due diligence.

If someone is buying shares from an existing shareholder, you’ll usually want a properly documented Share Transfer process so your cap table and registers stay consistent.

Trying To “Template” A Funding Round

Templates can be a useful starting point, but fundraising terms are rarely one-size-fits-all. If you’re negotiating valuation, dilution, investor protections, vesting, or board control, your documents should match the deal you’re actually doing.

Even at an early stage, a simple Term Sheet can help you pin down the key commercial terms before you spend time (and money) drafting the long-form documents.

Key Takeaways

• Paid-up capital is what shareholders have actually paid to the company for shares (whether in cash or certain types of non-cash consideration).
• Paid-up capital can differ from issued share capital if shares are partly paid, and unpaid amounts can create ongoing shareholder liability.
• Money received for shares can include both share capital (nominal value) and share premium (amount paid above nominal value), which are recorded separately.
• As your company grows, paid-up capital becomes important in fundraising, due diligence, and preventing ownership disputes.
• Your Articles of Association and any Shareholders Agreement can affect how shares are issued, paid for, and transferred.
• If you’re issuing new shares, make sure the payment terms, approvals, and records are properly documented (and consistent across your cap table, registers, and filings).
• If you’re unsure whether money is equity, a loan, or share premium, it’s worth getting advice early - it’s usually much easier to set up correctly than to fix later.

This article is general information only and isn’t legal, tax or accounting advice.

If you’d like help setting up or reviewing your company’s share structure, investment documents, or shareholder arrangements, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.