When share buy‑backs go wrong: key risks for private companies

20 May 2026 | posted in Corporate and business law

This insight is part of our Business Law newsletter | Spring 2026 series. Explore the full series at the end of this piece.

Share buy‑backs can be a powerful tool for private limited companies. Without an open market for their shares, private companies often rely on buy‑backs to manage shareholder changes, return excess cash or facilitate a clean exit for a departing shareholder.

When used correctly, buy‑backs provide speed and control, helping the company maintain a stable ownership structure while avoiding the need for remaining shareholders to personally fund a purchase. But this flexibility comes with rigid statutory requirements, and when a buy‑back is executed incorrectly, the consequences can be significant, long‑lasting and costly.

1. How buy‑backs commonly go wrong

Despite appearing straightforward, private company buy‑backs are laden with technical traps. The most frequent issues include:

Using the wrong source of funds

A company must use distributable profits, the proceeds of a fresh share issue or the statutory de minimis exemption to fund a buy-back out of capital. Funding a buy‑back from general cash reserves that are not distributable profits — even unintentionally — renders the buy‑back unlawful.

Incorrect or incomplete documentation

Common mistakes include failing to prepare a compliant buy‑back contract or not obtaining the correct shareholder approvals.

Improper payment timing

Payment for the shares must be made at the time of purchase. Deferred or instalment structures, earn-outs or “anti-embarrassment” clauses — often attractive commercially — can void the entire buy‑back.

Outdated financial information

Directors must have an accurate view of distributable reserves. Relying on old accounts or incomplete management information can result in an unlawful distribution and potential personal liability.

Unpaid shares

A company is only permitted to buy back fully paid shares. Buying back unpaid shares can result in an unlawful purchase.

2. Consequences of an unlawful buy‑back

If a buy‑back is not carried out correctly, the legal consequences can be significant. At worst:

The buy‑back may be void, meaning the company never legally acquired the shares.
The selling shareholder still owns the shares, even if they have left the business and received payment.
Directors may face personal liability.
The selling shareholder may be required to repay the amount received.
Voting decisions, dividends and previous corporate actions may be open to challenge.
Companies House filings and statutory registers may require amendments.

3. How an unlawful buy‑back can undermine a future sale

Errors in past buy‑backs frequently surface during legal due diligence on a future sale. Buyers examine share capital history closely, and an unlawful buy‑back raises immediate red flags:

The company’s share capital may be incorrect.
An exited shareholder may still legally hold shares.
Previous decisions, dividends and transactions may be invalid.
Governance concerns may reduce buyer confidence.

This can lead to price reductions, additional indemnities, deal delays, expensive and time-consuming corrective steps, or even a failed transaction.

Help from the experts

For private companies, buy‑backs are an effective way to manage shareholder changes and support long‑term stability. But the statutory rules are strict. A misstep can create significant financial, legal and transactional risks — including jeopardising a future sale. Careful planning, accurate financial information and proper legal documentation are essential to ensuring a buy‑back delivers its intended benefits without unwanted surprises.

Our experienced corporate lawyers at Moore SGD Law, working closely with our accountancy and tax colleagues at Moore Kingston Smith, have the expertise needed to help guide you through the buy-back process.

This article is provided for information purposes only. It does not constitute legal advice and should not be relied on or treated as a substitute for specific advice relevant to particular circumstances.