Tax implications of different methods of business finance

When you’re growing a business, sooner or later you’ll face a crucial decision: how do you fund expansion, equipment purchases, or working capital? Whether you’re considering a bank loan, bringing in investors, or using retained profits, each financing method carries different tax consequences. Understanding these implications can save you thousands of pounds and help you make smarter financial decisions. Here at Severn Accounting, we work with Worcester-based businesses of all sizes, and this is a question we’re asked regularly.

Bank loans and interest relief

Taking out a bank loan is often the most straightforward route, and the good news is that interest payments are generally tax-deductible. For corporation tax purposes, interest on business borrowing is deducted before calculating taxable profits, reducing your overall tax bill.

However, there are restrictions to be aware of. Under the interest deduction limitation rules (part of the ATAD regulations), companies with net interest expenses exceeding £2 million per year may face limits on how much interest they can deduct. For smaller companies, this rarely applies, but it’s worth checking if you’re planning significant borrowing.

If you’re a sole trader or partnership, interest on business loans is similarly deductible from your trading income for Self Assessment purposes. Keep meticulous records of the loan and its business purpose—HMRC scrutinises personal loans used for business more carefully.

Director loans and shareholder advances

Some owner-managers choose to inject capital as a loan rather than equity. This can seem attractive because, in theory, you can repay yourself without triggering a dividend or distribution. But HMRC has rules to prevent abuse.

If a director loan remains outstanding for more than nine months after the company’s year-end, the company must pay a “Section 419 charge”—essentially a 32.5% tax on the outstanding balance. This is separate from income tax, making it an expensive way to extract funds. The loan must be repaid in full within the nine-month window to avoid this charge.

Additionally, if the loan is written off, it’s treated as a distribution and may trigger income tax for the director involved. Our recommendation? If you’re injecting capital, consider whether equity or a properly documented director’s loan is appropriate, and plan repayment carefully.

Equity investment and dividends

Bringing in external investors—whether friends, family, or venture capital—means issuing shares. This avoids the repayment obligations of debt but introduces dividend tax implications for all shareholders.

In the current tax year (2024/25), dividends receive preferential tax treatment. The first £500 of dividends is tax-free for basic-rate taxpayers (the dividend allowance), and dividends are taxed at 8.75% for basic-rate taxpayers, 33.75% for higher-rate taxpayers, and 39.35% for additional-rate taxpayers. Companies pay corporation tax on profits before dividends are distributed, so there’s a “double taxation” effect worth considering.

For retained profits (earnings not distributed), only corporation tax applies at the standard rate of 19%. This is often more efficient than paying out dividends if you’re reinvesting in growth.

Retained profits

Using your business’s existing profits to fund growth is tax-efficient in many respects. You’ve already paid corporation tax on these profits (or Self Assessment tax if you’re self-employed), and keeping money in the business avoids additional distribution taxes.

The trade-off? You don’t receive personal income, so this only works if your business can sustain itself without drawings. It’s also worth considering whether retained profits could trigger the small profits rate or affect your corporation tax planning if you have other income sources.

Getting the balance right

The “best” financing method depends on your specific circumstances: your company structure, growth plans, profit levels, and personal tax position. A business relying on a £50,000 loan has very different tax planning needs than one with multiple shareholders.

At Severn Accounting, we help businesses structure their financing intelligently, ensuring you’re not paying more tax than necessary and that your funding strategy aligns with your long-term goals.

For tailored advice, contact Severn Accounting — we’re here to help.