Borrowing to Grow vs Using Company Cash Reserves: How to Decide

The case for using your own capital

Cash already sitting in the company bears no interest cost and requires no lender relationship, no security, and no covenant compliance. For directors who are averse to external obligations or whose companies operate in sectors that lenders view cautiously, self-funding eliminates execution risk on the finance side entirely.

Dividends or salary extracted from reserves are also already in the company's control — there is no third-party veto on how retained earnings are deployed.

The hidden cost of cash deployment

Cash reserves serve multiple functions simultaneously: they fund day-to-day operations, absorb unexpected costs, reassure trade creditors, and provide the buffer a company needs to take advantage of distressed opportunities. Deploying a large portion on a single project removes that buffer.

The opportunity cost question is: what else could that capital do? If the company is growing and opportunities are available, finance that costs less per year than the marginal return generated may be the better economic choice.

Tax treatment of interest

Interest on a business loan taken for trading purposes is generally deductible against corporation tax, reducing the effective cost of the debt. The deductibility rules are more complex for holding company structures and property investment companies — take advice from your accountant. Retained earnings deployed as investment do not carry a comparable current-year tax deduction.

A practical framework for the decision

• What is the projected return on the investment over three years?
• What is the cost of debt net of tax relief (illustrative — verify with your accountant)?
• What would the company's cash position look like post-deployment in a downside scenario?
• Are further opportunities likely in the next twelve months that would also need funding?
• How would lenders view the company's liquidity position if a funding application were needed urgently?