When a UK company faces cash-flow difficulties, converting a shareholder loan into equity can be a commercially sensible alternative to writing off the debt entirely. For the lender - often a director, family member or business associate - this swap preserves a stake in the business and can bring inheritance tax advantages. But it does not give the lender a capital loss, it rules out the relief that might otherwise be claimed on a loan the company can't repay, the share valuation must withstand scrutiny, and the mechanics involve formal shareholder approvals and filings at Companies House. Understanding the tax and legal framework before proceeding is essential to avoid unexpected liabilities and maximise available reliefs.
Why entrepreneurs lend to their own companies
Starting and scaling a business typically requires more capital than external lenders or government schemes will provide. While government-backed start-up loans and bank facilities exist, they are capped and often insufficient to cover incorporation costs, initial trading losses and personal living expenses during the early months. Many founders therefore inject their own funds as loans rather than equity, preserving flexibility and avoiding immediate dilution of ownership.
Problems arise when the company later struggles: the loan sits on the balance sheet as a liability the business cannot repay, and the lender faces the prospect of a bad debt. If the company is incorporated, one option is to convert that loan into new shares - a debt-to-equity swap. This keeps the lender's economic interest alive and can help with inheritance tax planning, but for capital gains tax it can leave the lender worse off than claiming relief on a loan that has become irrecoverable.
How HMRC treats a loan-for-shares exchange
HMRC does not view a loan-for-shares swap as a mere book entry. Instead, it is treated as a disposal of the debt (a capital asset) in return for consideration equal to the market value of the shares received at the time of the transaction. However, for an ordinary shareholder or director's loan (a simple debt, not a 'debt on a security'), no chargeable gain or allowable loss arises to you as the original lender on that disposal.
Because a gain on such a loan would not be chargeable, a loss on it is not normally an allowable capital loss either; the main exception is relief for loans to traders that have become irrecoverable (TCGA 1992 s253). Loans-to-traders relief is not available if the loan became irrecoverable because of your own act, such as waiving a debt the company could have repaid, but waiving a loan that had already become irrecoverable does not by itself prevent a claim. Exchanging the loan for shares does not crystallise a capital loss either: HMRC says no loans-to-traders relief is due once a loan has been satisfied by an issue of shares, even if the shares are worthless.
Valuing the shares: why it matters and how to get it right
The market value of the shares you receive sets the base cost of your new shareholding for future CGT calculations. HMRC expects a robust, reasonable valuation - guesswork or optimistic assumptions will not survive enquiry.
For an unquoted private company, market value is what a hypothetical willing buyer would pay a willing seller in an arm's-length transaction. Factors include:
- The company's net asset position and recent trading performance
- Forecast cash flows and profitability
- Comparable transaction multiples in the same sector
- Any restrictions on the shares (voting rights, dividend entitlement, transfer restrictions)
- The size of the shareholding and whether it confers control
If the company is loss-making or balance-sheet insolvent, the shares may have negligible or even nil market value. Conversely, if the business has strong intangible assets - brand, customer relationships, intellectual property - the shares could be worth more than a simple net-asset calculation suggests.
Valuation checks by HMRC: HMRC's Shares and Assets Valuation team will not value or agree shares in advance. After a disposal relevant to capital gains tax, such as a later sale of the shares, you can ask it to check your valuation using form CG34, as long as you do so before your tax return is due. This is not mandatory, but it reduces the risk of a later dispute.
Capital gains tax on the disposal and future sale of shares
At the moment you exchange the loan for shares, you are treated as disposing of the debt, but for an ordinary loan no chargeable gain or allowable loss arises, even if the shares are worth less than the amount you lent. Instead, the shortfall can reduce a gain when you later sell the shares, as explained below.
The market value of the shares on the date of issue becomes your new base cost. When you eventually sell or otherwise dispose of those shares, your capital gain or loss is calculated as:
Proceeds on disposal − base cost (market value at issue) = gain or loss, except that any gain is capped at what it would have been had the shares cost the full amount of the loan
Standard CGT rates apply: for 2026/27, gains above the £3,000 annual exempt amount are taxed at 18% or 24%, depending on your total taxable income.
Business asset disposal relief (formerly entrepreneurs' relief)
Business asset disposal relief taxes qualifying gains at 18% on disposals from 6 April 2026, subject to a £1 million lifetime limit. However, to qualify when disposing of shares, you must meet strict conditions at the time of disposal:
- You must be an employee or officer of the company (or of a group member)
- You must hold at least 5% of the ordinary share capital and voting rights, and be entitled to at least 5% of either the distributable profits and assets on a winding up or the sale proceeds if the company is sold
- The company must be a trading company (or the holding company of a trading group)
- You must have held the shares and met the employment and percentage tests for at least 2 years before disposal
If you acquired the shares through a loan-for-equity swap and were not previously a director or employee, or if your new shareholding falls below the required threshold, business asset disposal relief will not be available unless you later satisfy all conditions for the requisite period. Always check the current qualifying criteria and holding-period rules on gov.uk before assuming relief will apply.
Negligible value claims if the company fails
If the company subsequently fails and the shares become worthless, you can make a negligible value claim to HMRC. This allows you to crystallise a capital loss without actually disposing of the shares, which can then be set against gains in the tax year of the claim or carried forward.
You can ask for the loss to be treated as arising at an earlier date, up to two years before the start of the tax year in which you make the claim, provided you owned the shares then and they were already of negligible value at that date. HMRC will expect evidence: cessation of trade, insolvency proceedings, or a balance sheet showing liabilities far exceeding assets, and it may challenge a claim if goodwill or other assets still give the shares some value. Bear in mind that the loss is based on what the shares were worth when you received them, not on the amount of the original loan.
Inheritance tax: unlocking business property relief
One significant advantage of converting a loan into shares is the potential to qualify for inheritance tax business property relief. A loan to a company - even your own trading company - does not qualify for BPR. By contrast, shares in a private trading company can attract BPR if the conditions are met: for deaths on or after 6 April 2026, relief is 100% on up to £2.5 million of qualifying business and agricultural property and 50% on value above that (shares traded on AIM get only 50% relief).
To qualify for BPR on shares, the company must be a trading company (or the holding company of a trading group) and not exist wholly or mainly to hold investments. You must have owned the shares for at least two years before death (or before making a lifetime transfer), and the shares must still qualify as business property at the date of death or transfer.
This relief can be transformative for estate planning: a loan that would be fully chargeable to IHT at 40% above the nil-rate band can become exempt once converted into qualifying shares, provided the two-year ownership condition and trading status are satisfied. If the shares are still held at death and meet the BPR conditions, their value falls outside your taxable estate up to the £2.5 million 100% relief allowance, with 50% relief on any excess.
The IHT nil-rate band is £325,000 and the residence nil-rate band is £175,000, and any unused part of the £2.5 million BPR allowance can pass to a surviving spouse or civil partner.
The legal mechanics: shareholder approval and Companies House filings
Converting a loan into shares is not a mere accounting adjustment - it requires formal corporate actions under the Companies Act 2006 and your company's articles of association. The typical process involves:
- Board resolution to allot shares: The directors must resolve to issue new shares, specifying the class, number and nominal value. If the company's articles require it, or if the proposed allotment would exceed existing authority, shareholder approval (ordinary or special resolution) may also be needed.
- Shareholder approval (special resolution if required): If the new shares will be a different class (for example, preference shares with priority rights), or if the articles require a special resolution to create a new class, a 75% majority of voting shareholders must approve.
- Pre-emption rights: If the new shares are ordinary shares, existing shareholders have a statutory right to be offered them first, in proportion to their holdings, because releasing a debt counts as paying for shares in cash. A private company's articles can exclude this right, or shareholders can disapply it, for example by special resolution.
- Loan agreement amendment or discharge: The existing loan agreement should be formally amended or discharged to reflect that the debt is being satisfied by the issue of shares rather than cash repayment.
- Allotment and issue of shares: The board formally allots the shares, and share certificates are issued to the lender.
- Filing at Companies House: A return of allotment (currently Form SH01) must be filed, along with a statement of capital, within one month of the allotment. If a new class of shares has been created, an amended copy of the articles may also need to be filed.
- Update the statutory registers: The register of members must be updated to reflect the new shareholding as soon as practicable, and in any event within two months of the allotment.
Getting these steps wrong doesn't usually invalidate the allotment, but directors who knowingly allot shares without authority, or who fail to file the return of allotment, commit offences, the company and its officers can be liable to compensate shareholders whose pre-emption rights were ignored, and mistakes can create uncertainty over the tax treatment.
Preference shares vs ordinary shares
Lenders converting debt are sometimes offered preference shares rather than ordinary shares. Preference shares typically confer:
- Priority for dividends (a fixed percentage or amount paid before ordinary dividends)
- Priority on a winding-up or return of capital (repayment ahead of ordinary shareholders)
- Limited or no voting rights
Issuing preference shares protects the lender's economic interest while minimising dilution of control for existing ordinary shareholders. However, existing shareholders may still resist because any new equity dilutes their percentage ownership and their entitlement to future profits and capital growth. Transparent communication and, where appropriate, a formal valuation can help manage these concerns.
Fixed-rate preference shares also carry tax drawbacks. They don't count as ordinary share capital, so they won't help the lender meet the 5% shareholding test for business asset disposal relief. And the company may face a taxable credit on the loan it no longer has to repay, because the rule that normally stops a debt released in exchange for shares from being taxed on the company covers only ordinary shares.
When a loan-for-shares swap makes sense - and when it doesn't
A debt-to-equity conversion is not always the right answer. Consider the following scenarios:
Good candidates for conversion:
- The company has strong long-term prospects but temporary cash-flow difficulties
- The lender wants to preserve an economic stake and is willing to accept equity risk
- The lender's estate would benefit from IHT business property relief (and the two-year ownership period can be satisfied before death or transfer)
- The lender is content to forgo a capital loss, since any shortfall between the loan and the shares' value still reduces a gain on a later sale of the shares
- The lender is already a director or employee and could potentially qualify for business asset disposal relief on a future exit
Poor candidates for conversion:
- The company is irretrievably insolvent with no realistic prospect of recovery - a claim for loans-to-traders relief on the irrecoverable loan may be simpler, and converting it into shares would rule that relief out
- The lender needs liquidity and cannot afford to lock funds into illiquid shares
- Existing shareholders will not approve the dilution, creating conflict
- The lender wants a capital loss to set against other gains: converting the loan gives none, whereas a claim on an irrecoverable loan to a trading company can
In every case, professional advice - both tax and legal - is essential before proceeding.
Frequently asked questions
Can I claim a capital loss immediately when I exchange my loan for shares?
No. For an ordinary loan, no allowable loss arises on the exchange, even if the shares are worth less than the amount you lent, and HMRC will not give loans-to-traders relief once the loan has been satisfied by shares. The shortfall can instead reduce a gain when you later sell the shares, so you still need a robust, reasonable valuation of the shares at the date of issue.
What happens if I simply write off the loan without taking shares?
If the loan has already become irrecoverable, you may be able to claim loans-to-traders relief under TCGA 1992 s253, even if you have since waived it; no relief is due if the loan became irrecoverable because of your own act, such as waiving a debt the company could have repaid. A loan-for-shares swap does not give a capital loss either.
Do the shares I receive qualify for business property relief immediately?
No. To qualify for 100% IHT business property relief, you must own the shares for at least two years before death (or before making a lifetime transfer), and the company must be a trading company, rather than one carried on wholly or mainly to make or hold investments, at the date of death or transfer. The relief is not automatic - the conditions must be satisfied at the relevant time.
Can I use business asset disposal relief when I eventually sell the shares?
Only if, at the time of disposal, you meet all the qualifying conditions: you must be an employee or officer, hold at least 5% of the ordinary share capital and voting rights (and meet the 5% profits-and-assets or sale-proceeds test), the company must be a trading company, and you must have satisfied these tests for at least 2 years before the sale. Simply receiving shares in a debt-for-equity swap does not automatically confer relief.
Do I need HMRC's agreement on the share valuation?
No, and HMRC will not agree a share valuation in advance. After a disposal relevant to capital gains tax, such as a later sale of the shares, you can ask its Shares and Assets Valuation team to check your valuation using form CG34 before your tax return is due, which reduces the risk of a later dispute. Keep a written valuation from the date of the swap either way.
What if the company later becomes insolvent and the shares become worthless?
You can make a negligible value claim to crystallise a capital loss without disposing of the shares. The loss can be set against gains or carried forward, but it is based on what the shares were worth when you received them, not on the amount you originally lent. HMRC will expect evidence that the shares are genuinely of negligible value - such as cessation of trade, formal insolvency, or a balance sheet showing the company is hopelessly insolvent.
Final thoughts
If you are considering converting a shareholder loan into equity, or if your company is navigating financial difficulties and you need strategic tax and accounting advice, our team at MPS Accountancy can help you work through the tax position and plan the next steps alongside your legal adviser. Get in touch to discuss your specific circumstances and explore the best route forward for your business and personal tax position.
