Why interest expense matters to a first-time founder
Interest expense reduces profit and consumes cash that cannot fund hiring or product work. Tracking it helps you see the real cost of borrowing, forecast covenant pressure and compare debt with equity financing. As rates or balances rise, an affordable facility can become a material drag on the business.
Examples of interest expense
A startup has a €100,000 loan charging 6% a year and records €1,500 of interest expense for a three-month quarter, assuming a stable balance and simple accrual. The quarterly cash payment may occur on another date. Accounting records the cost in the period it relates to, not necessarily when cash leaves.
Common misunderstanding
Interest expense is not the same as the principal repayment. Paying principal reduces the loan balance; it does not normally reduce profit. Interest is the cost of using the lender’s money. Fees, capitalised borrowing costs and tax treatment can follow separate accounting or legal rules, so check the agreement and applicable standards.
When to use it
Use this figure when building forecasts, reviewing a profit and loss statement, calculating debt affordability or comparing financing offers. Model changes in rates and borrowing balances, especially for variable-rate debt. Ask an accountant how to treat arrangement fees, accrued interest or borrowing costs linked to a qualifying asset.