Borrowed money is not normally trading income, and repaying loan principal is not an ordinary deductible expense. Interest and finance charges need their own business-purpose assessment. Keep the agreement so the purchase, principal and interest are not claimed as the same cost several times.
Borrowing is not normally trading income
A genuine loan brings an obligation to repay. Receiving the borrowed capital is not usually a customer sale, and repaying the capital is not usually a deductible business running cost. The purchase funded by the loan needs its own tax treatment.
For example, borrowing £5,000 to buy equipment does not normally create £5,000 of sales. A later repayment does not automatically create another equipment deduction. Keep the loan and the asset purchase separately identifiable.
Interest and charges need a purpose check
Interest on qualifying business borrowing and certain finance charges can be allowable, subject to the relevant rules. Personal use or mixed use can restrict the claim. The label on the bank account does not establish how the borrowed money was actually used.
Supply the agreement, interest schedule and evidence of where the funds went. Where a payment contains both capital and interest, the accountant needs the breakdown rather than treating the whole instalment as an expense.
Different finance arrangements can differ
Hire purchase, leasing, credit cards and ordinary loans can require different analysis. Residential landlord finance costs also have separate restrictions, so do not transfer sole trader loan treatment directly to a buy-to-let mortgage.
If a lender writes off debt or the business closes before repayment, raise it with the accountant. Those events can create questions beyond the ordinary annual interest entry.
Reconcile the bank and accounts
Explain transfers from personal savings and repayments to yourself as well as bank borrowing. Owner's funds are not automatically sales, and money withdrawn for living costs is not a business expense.
TaxSimba can review finance entries within your agreed bookkeeping or tax-return service. Providing a clear capital-and-interest schedule helps the accountant avoid both overstating expenses and overlooking genuine costs, while keeping the balance owed to the lender distinct from the tax due to HMRC.
Split a repayment before entering it
If a £300 loan repayment comprises £250 principal and £50 interest, do not enter £300 as an ordinary interest expense. The £250 reduces the debt; the £50 needs the business-purpose and relevant accounting checks. The asset bought with the borrowing can have its own tax treatment, so keep the purchase and finance records linked.
Check the home nation used for your tax calculation
Tell the accountant whether you live in England, Scotland, Wales or Northern Ireland, and about any moves during the tax year. Scottish rates differ for wages, pensions and most other taxable income; savings and dividends use UK rules. Welsh rates are set separately. Use the rules for the relevant year and your actual taxpayer status.
See Scottish Income Tax and Welsh Income Tax. These differences do not make a London address or an England-only earnings example appropriate for everyone.
Split the finance payment into its components
Illustrative preparation example.
A £300 repayment comprises £250 principal and £50 interest. Keep the agreement and identify the components before reviewing the business-interest treatment. Keep the purchase invoice separately so the asset is not claimed again through repayments of its borrowing.
Check: Which entries represent the asset, repayment of debt and possible finance expense?
| Check | Practical action |
|---|---|
| What did the borrowed funds finance? | Provide the agreement and evidence of business or mixed use. |
| How does each instalment split? | Separate repayment of capital from interest and relevant charges. |
| Has the purchase already received relief? | Reconcile the asset and finance records to prevent duplicate deductions. |
Does a loan paid into the business account count as sales?
A genuine repayable loan is not ordinarily a customer receipt. Label the funding clearly.
Are hire purchase and ordinary loans always treated alike?
No. Supply the actual agreement so the arrangement and asset treatment can be checked.
Download a checklist for this guide
- Collect loan and finance agreements.
- Trace the use of borrowed funds.
- Obtain capital-and-interest schedules.
- Link financed purchases to asset records.
- Identify private use, write-offs or business closure.