Commercial Finance

Interest Rate

Definition

An interest rate is the percentage used to calculate the charge for borrowing money over a stated period and on a stated balance.
Author:
Sorbus Finance
Reviewed by:
Arran Turner, 11 November 2026
Published:

How interest rate works

The agreement determines whether the rate is fixed or variable, the calculation basis and whether interest accrues on a reducing balance, original amount or another contractual basis. Fees may sit outside the quoted rate.

Practical UK business example

A company asks whether a quoted annual rate applies to the reducing loan balance and requests the full payment schedule, including fees.

Illustrative example only; not a finance quotation or a client case study.

Why it matters

The rate affects cost, but only becomes comparable when the calculation basis, term and payment timing are understood.

Limitations and common misconceptions

A lower headline rate can coexist with a higher total cost if the term or fees differ. A monthly rate multiplied by twelve does not necessarily give an APR.

Discuss business borrowing to discuss how the structure relates to your business.

Further reading from Sorbus Finance

References

  1. British Business Bank: forms of business finance
  2. Bank of England: interest rates and Bank Rate

This definition is general information for UK businesses, not personal advice. Lender criteria and product terms vary. Sorbus Finance is a broker, not a lender.

Related finance resources (1)
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