Nearly 1 in 5 UK businesses rely on an overdraft at some point to manage cash flow or cover unexpected expenses. Understanding how business overdrafts work, their costs, and when to use them can help small business owners make informed financial decisions and avoid unnecessary charges.

Typical Business Overdraft Costs and Limits (2026/26)
Feature Typical Range Notes
Overdraft Limit £500 to £100,000+ Depends on business size, creditworthiness, and bank
Interest Rate (EAR) 5% to 15% APR Charged on amount overdrawn, varies by provider
Arrangement Fee £0 to £250 One-off fee for setting up the overdraft
Monthly Fee £0 to £20 Some banks charge a monthly maintenance fee
Unauthorised Overdraft Fee £10 to £50 per incident Charged if you exceed your agreed limit

How Business Overdrafts Work

A business overdraft is a flexible short-term borrowing facility linked to your current account that allows you to spend more than your available balance, up to an agreed limit. Unlike loans, overdrafts offer instant access to additional funds without needing to reapply each time.

Overdrafts are typically used to cover temporary cash flow gaps, such as late payments from customers or unexpected expenses. Interest is usually charged only on the amount you use, not on the total overdraft limit.

Most UK banks offer overdrafts to companies registered with Companies House as well as sole traders and partnerships. The overdraft limit and interest rate depend on factors including your business credit rating, turnover, and banking history.

Costs of Business Overdrafts

Understanding the full cost of an overdraft is key to managing your finances effectively. Costs can include:

  • Interest: Charged daily on any overdrawn amount, with rates typically higher than standard business loans.
  • Arrangement Fees: Some banks charge a one-off fee to set up the overdraft facility.
  • Monthly Maintenance Fees: Certain providers levy a monthly fee regardless of usage.
  • Unauthorised Overdraft Fees: If you exceed your agreed limit, expect penalty fees and higher interest.

HMRC does not treat overdraft interest as capital expenditure but as a business expense, so it is usually tax-deductible when calculating your taxable profits.

Applying for a Business Overdraft

Applying for an overdraft involves submitting financial information to your bank to assess your creditworthiness. This usually includes recent business bank statements, management accounts, and details of your business plan.

You should also be prepared to explain how you intend to use the overdraft and how you plan to repay it. Banks may request security or personal guarantees, especially for larger limits.

Steps to Apply for a Business Overdraft

  1. Review your business’s cash flow to determine the amount you need.
  2. Gather recent financial documents, including bank statements and management accounts.
  3. Contact your bank or preferred lender to discuss overdraft options and eligibility.
  4. Complete the application form and provide requested documentation.
  5. Negotiate terms such as interest rate, limit, fees, and repayment conditions.
  6. Once approved, monitor your overdraft usage carefully to avoid unauthorised fees.
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When to Use a Business Overdraft

A business overdraft is ideal for short-term funding needs rather than long-term finance. It works well to smooth out temporary cash flow issues, such as:

  • Covering supplier payments when invoices have not yet been paid.
  • Managing seasonal fluctuations in sales or expenses.
  • Handling unexpected costs without disrupting daily operations.
  • Bridging gaps before receiving VAT repayments or other HMRC refunds.

Because overdrafts usually have higher interest rates than other forms of borrowing, they are not recommended for financing major investments or expansion plans.

Alternatives to Business Overdrafts

If you need finance beyond short-term flexibility, consider other options that may be more cost-effective or better suited to your business goals:

  • Business Loans: Fixed-term loans with set repayment schedules and often lower interest rates.
  • Invoice Financing: Unlock cash tied up in unpaid invoices through factoring or discounting.
  • Business Credit Cards: Useful for managing regular expenses with interest-free periods and rewards.
  • Government-backed Loans: Such as the Recovery Loan Scheme, offering favourable terms for eligible UK businesses.

Choosing the right finance depends on your cash flow situation, repayment capacity, and business objectives. For more detailed guidance, see our Corporation Tax Guide and Sole Trader vs Limited Company articles.

Managing Your Overdraft Effectively

To get the most out of your business overdraft and avoid costly fees:

  • Keep accurate cash flow forecasts to anticipate your funding needs.
  • Use the overdraft only for short-term gaps, not ongoing expenses.
  • Regularly review your overdraft limit and negotiate better terms as your business grows.
  • Set up alerts with your bank to avoid exceeding your agreed limit.
  • Repay the overdraft promptly to minimise interest charges.

Good financial discipline will help maintain a healthy relationship with your bank and improve your chances of accessing larger or longer-term finance in future.

Key Takeaways:
  • Business overdrafts provide flexible, short-term finance linked to your current account.
  • Costs include interest, arrangement fees, and possible penalty charges for unauthorised use.
  • Ideal for managing cash flow fluctuations, not long-term investment.
  • Application requires financial documentation and may involve credit checks or guarantees.
  • Consider alternatives like loans or invoice finance for larger or longer-term needs.
  • Effective management helps avoid fees and maintains good banking relationships.

Can I get a business overdraft as a new start-up?

New start-ups may find it harder to obtain an overdraft due to limited trading history. However, some banks offer facilities to new businesses with a solid business plan and personal guarantees. Exploring government-backed finance schemes can also help.

Is overdraft interest tax deductible for my business?

Yes, interest paid on a business overdraft is generally tax deductible as a business expense when calculating taxable profits, in accordance with HMRC guidance. Keep accurate records of interest payments for your accounts.

What happens if I exceed my overdraft limit?

Exceeding your agreed overdraft limit is classed as an unauthorised overdraft and usually results in penalty fees, higher interest rates, and possible damage to your credit rating. Contact your bank immediately if you anticipate exceeding your limit.

Official Sources
* GOV.UK: Set up a business  ·  * HMRC: Income Tax rates  ·  * HMRC: Corporation Tax  ·  * HMRC: VAT registration