What it means
When a business takes a loan, the lender sets out a repayment schedule showing how much is due and when. In a standard amortising loan the total payment stays the same each period, but the mix inside it shifts: early payments are mostly interest, later ones mostly principal.
That is why paying a loan for two years can leave the balance looking stubbornly high. The split matters because the two halves are treated differently.
Interest is an expense that hits the profit and loss account, while the principal portion is a balance sheet movement that reduces the loan liability and appears in financing activities on the cash flow statement. A manager who assumes the whole repayment is an expense will understate profit and misread the cash flow statement.
Repayment structures vary. A bullet or balloon loan requires interest only during the term with the full principal repaid at the end, an amortising loan spreads principal across the term, and a revolving facility can be repaid and redrawn repeatedly.
The structure chosen should match how the borrowed money generates cash. Lenders usually attach conditions to repayment.
Early repayment may trigger a fee designed to compensate the lender for lost interest, and missing a scheduled repayment can breach a covenant and make the whole balance immediately due. Reading those clauses before signing is far cheaper than discovering them later.
For planning purposes, the figure to watch is total scheduled repayments over the next twelve months compared with expected operating cash flow. If repayments consume most of the cash the business generates, there is little room for a bad quarter.
Lenders test the same ratio, often calling it debt service cover.
In practice
Real-world examples.
Example
A bakery chain takes a $150,000 equipment loan and repays it over five years. The finance manager books the interest element to the profit and loss account each month and the principal element against the loan balance, so the accounts show both the true cost and the shrinking debt.
Example
A property developer arranges a bullet loan with interest-only repayments during construction and the full principal repaid on completion. The structure works because no cash is generated until units are sold, but it leaves a single large repayment date that has to be refinanced or covered by sales.
Example
A consultancy wins a large contract and wants to clear its bank loan two years early. The credit agreement carries an early repayment fee equal to three months of interest, so the finance director compares that fee against the interest saved before deciding.
Formula
Calculation
Interest portion = Outstanding balance x periodic interest rate; Principal portion = Total payment - interest portion
A business borrows $200,000 at 6% a year, repaid monthly at $2,000 per instalment. The monthly rate is 6% / 12 = 0.5%. In month one, interest is $200,000 x 0.005 = $1,000, so the principal portion is $2,000 - $1,000 = $1,000 and the balance falls to $199,000. In month two, interest is $199,000 x 0.005 = $995, the principal portion is $2,000 - $995 = $1,005, and the balance falls to $197,995. Across those two months the business paid $4,000 in cash but reduced its debt by only $2,005, with the remaining $1,995 recorded as interest expense.Case study
Seen in the real world.
Halberd Logistics is a fictional regional haulage firm used here purely as an illustrative case. It borrowed $600,000 to buy vehicles and repaid $12,500 a month. The managing director noticed that after eighteen months, having paid out $225,000, the loan balance had fallen by far less than he expected and worried the bank had made an error.
The bank had not. The schedule showed that a substantial part of every early repayment was interest, and the principal portion only grew as the balance came down. Once the finance team produced a simple table splitting each repayment into interest and principal, the pattern made sense.
Halberd used the same illustrative table to reset expectations with its board and to model an extra annual overpayment of $30,000. Because overpayments apply entirely to principal, they shortened the term and cut total interest, which was a better use of surplus cash than leaving it in a low-yielding deposit account.
Watch out
Common mistakes.
- Recording the entire repayment as an expense, which understates profit and overstates the reduction in debt.
- Assuming the loan balance falls evenly over the term, when in an amortising loan the early years barely dent the principal.
- Overlooking early repayment fees and covenant clauses until the business actually wants to clear the debt.
Questions
People also ask.
Where does repayment appear on the cash flow statement?
The principal element sits in financing activities, while interest paid sits in operating activities under most reporting frameworks.
Does making an overpayment always save money?
Usually yes, because overpayments reduce principal and therefore future interest, but the saving must be weighed against any early repayment fee and the alternative uses of that cash.
What happens if a scheduled repayment is missed?
The lender can charge default interest, and a missed payment often counts as an event of default that allows the lender to demand the full outstanding balance.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%