Understanding how loan repayments work can help business owners assess the potential financial impact of borrowing. The amount borrowed, interest rate and repayment period all affect both the monthly repayment and the total amount repaid. For background on how the UK’s Start Up Loans scheme operates.
These start up loan repayments are shown for educational purposes only. They illustrate how repayments can change depending on the amount and repayment period and are not loan offers or recommendations to borrow.
What Determines a Monthly Loan Repayment?
Three main factors usually determine the monthly repayment on a fixed-rate loan:
- Amount borrowed: A larger principal generally results in a higher monthly repayment.
- Interest rate: A higher interest rate increases the cost of borrowing.
- Repayment term: Spreading repayments over a longer period usually reduces the monthly payment but can increase the total interest paid.
For example, repaying the same amount over two years instead of five years normally results in higher monthly payments. However, because the outstanding balance is repaid more quickly, the total interest cost is generally lower.
Example Loan Repayments
To demonstrate how the repayment term affects monthly costs, consider a hypothetical fixed annual interest rate of 7.5%. The figures below use standard amortising instalment calculations, with the monthly rate set at 0.625%.
Approximate repayments could look like this:
| Loan amount | 2-year term | 5-year term |
|---|---|---|
| £5,000 | £225.05/month | £100.18/month |
| £10,000 | £450.11/month | £200.35/month |
| £25,000 | £1,125.27/month | £500.88/month |
These figures are illustrative. Actual repayments depend on factors such as the interest calculation method, fees, repayment structure and specific terms of a financial agreement. For the interest rates, fees and early repayment terms that currently apply to government-backed schemes, check the official Start Up Loans guidance on GOV.UK before relying on any figure.
Monthly Repayment vs Total Cost
Looking only at the monthly payment can give an incomplete picture of borrowing costs.
A longer repayment period may make each individual payment smaller, but interest is typically charged for longer. This can increase the total amount paid over the lifetime of the loan.
A shorter repayment period has the opposite effect. Monthly payments are higher, but the balance is reduced more quickly, potentially reducing the overall interest cost.
This is why both the monthly repayment and the total amount repayable are useful when comparing different repayment scenarios.
How Loan Repayment Calculations Work
For many fixed-rate instalment loans, repayments are structured so that the borrower makes the same payment each month. Each payment consists of two elements:
- Principal is the portion that reduces the outstanding amount borrowed.
- Interest is the cost charged on the outstanding balance.
During the earlier stages of a typical amortising loan, a larger proportion of each payment may go towards interest. As the outstanding balance falls, more of the monthly payment goes towards repaying the principal.
The exact calculation depends on the structure of the financial product.
Testing Repayments Against Business Cash Flow
For a business, the size of a repayment is only one part of affordability. The timing of income and expenses can be equally important.
A simple way to understand the potential effect is to include the hypothetical monthly repayment in a cash flow forecast.
For example, suppose a business expects:
- £8,000 in monthly revenue
- £5,500 in operating expenses
- £1,000 in other regular financial commitments
That leaves £1,500 before any additional loan repayment.
A hypothetical repayment of £500 per month would reduce the remaining amount to £1,000. A repayment of £1,100 would reduce it to £400.
This type of calculation does not determine whether borrowing is appropriate. It simply illustrates how an additional fixed financial commitment can affect available cash.
Why Quieter Months Matter
Using average annual revenue alone can hide seasonal cash flow problems.
A business might generate an average of £10,000 per month while actually receiving £15,000 during busy periods and only £5,000 during quieter months.
Loan repayments generally remain due regardless of monthly sales performance. Testing hypothetical repayments against weaker months can therefore provide a more realistic picture of their effect on cash flow.
Comparing Different Repayment Terms
Consider a hypothetical £10,000 loan.
With a shorter repayment period, the monthly commitment would normally be higher, but the debt would be outstanding for less time.
With a longer repayment period, the monthly commitment would normally be lower, but interest could accumulate over a longer period.
Neither structure is inherently preferable. They simply produce different cash flow and total-cost characteristics.
Understanding the Amount Borrowed
The amount borrowed also has a direct effect on repayment obligations.
For example, at the same interest rate and repayment term, borrowing £20,000 will generally produce approximately twice the monthly principal and interest commitment of borrowing £10,000.
When modelling business finances, it can therefore be useful to calculate several scenarios rather than considering only one amount.
- Scenario A: £5,000
- Scenario B: £10,000
- Scenario C: £25,000
Each scenario can then be tested against projected revenue, operating expenses and available cash.
Factors to Include in a Repayment Scenario
A useful financial model can include more than the headline monthly repayment. Depending on the type of finance being examined, relevant factors may include the interest rate, repayment term, total interest cost, fees, early repayment conditions and whether the rate is fixed or variable.
Business forecasts can also account for changes in revenue, unexpected costs and seasonal fluctuations.
Running several scenarios can show how sensitive the business’s cash position is to different assumptions.
Key Takeaway
Loan repayment calculations illustrate the relationship between the amount borrowed, interest rate and repayment period.
A shorter repayment period generally creates higher monthly payments but a lower overall interest cost. A longer period generally reduces the monthly commitment while potentially increasing the total amount of interest paid.
For business financial planning, repayment examples are most useful when viewed as part of a wider cash flow forecast rather than as standalone monthly figures. Comparing several hypothetical amounts and repayment periods can help illustrate how different financial commitments would affect cash flow under both stronger and weaker trading conditions.
