Commercial Finance

Fixed Interest Rate

Definition

A fixed interest rate remains unchanged for the fixed period specified in the agreement, even if relevant market rates change.
Author:
Sorbus Finance
Reviewed by:
Arran Turner, 11 November 2026
Published:

How fixed interest rate works

The fixed period can cover all or part of the loan term. Payments still depend on the repayment profile and any contractual charges; a fixed rate alone does not establish that every payment or fee is unchangeable.

Practical UK business example

A business chooses a loan with a rate fixed for its five-year term to make the interest element more predictable, then checks settlement charges before committing.

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

Why it matters

Rate certainty can support budgeting and protect against increases in the reference rate during the fixed period.

Limitations and common misconceptions

The borrower may not benefit when market rates fall, and early repayment can incur costs. Fixed rate is not automatically the cheapest or most suitable structure.

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

Further reading from Sorbus Finance

References

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

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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