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The Cost of Borrowing From Your Own Business: How Directors Accidentally Create Tax Bills

Many directors assume they can borrow money from their company whenever needed — especially in small, owner-managed businesses where the director and the company feel almost interchangeable. A quick transfer to cover a personal bill, an unexpected expense paid using the company card, or a temporary dip into company funds “until next month” seems harmless.

But in the eyes of HMRC, borrowing from your own company is not harmless at all. In 2025/26, more directors than ever are triggering avoidable tax charges because of overdrawn director’s loan accounts, incorrect withdrawals, and poorly documented transactions.

This post explains how borrowing from your company actually works, the hidden tax costs directors often overlook, and how to avoid the expensive traps that HMRC regularly investigates.

The Fundamental Rule: Your Limited Company Is Not “You”

For tax and legal purposes, your company is a separate legal entity.
That means:

  • Company money is not your money.
  • Any withdrawal must be classified correctly — salary, dividend, loan, reimbursement, or expense claim.
  • If it’s not classified correctly, HMRC will classify it for you.

This is why borrowing from the company is tightly governed by tax law — and why casual or undocumented withdrawals can cause large tax problems later.

1. The Overdrawn Director’s Loan Account: Where Most Problems Start

A Director’s Loan Account (DLA) records money:

  • You owe to the company (overdrawn), or
  • The company owes to you (in credit)

An overdrawn DLA means you’ve taken more out of the company than you’ve put in or are entitled to via salary or dividends.

Directors usually get caught out because:

  • They withdraw funds before declaring dividends
  • They pay personal expenses with the company card
  • They take short-term loans but forget to repay them
  • They withdraw round-sum amounts with no explanation

HMRC doesn’t need to prove intent. If the DLA is overdrawn, there are tax consequences.

2. The Section 455 Charge: A 33.75% Surprise Tax

If the director owes the company money at the year-end, and the loan isn’t repaid within 9 months, the company must pay a Section 455 charge at:

33.75% of the outstanding loan

This applies in 2025/26 and is aligned with the higher dividend tax rate.

Example

You withdraw £15,000 from the company in January 2026.
Your company year-end is 31 March 2026.
You haven’t repaid the loan by 31 December 2026.

The company must pay:

£15,000 × 33.75% = £5,062.50

Although this tax is refundable when the loan is finally repaid, the refund:

  • Can take years, and
  • Is only repayable 9 months after the accounting period in which the repayment happened.

So a director may be out of pocket for a long time — often because they didn’t realise they had borrowed in the first place.

3. Personal Tax on Written-Off Loans

Some directors decide not to repay the loan and instead “write it off.”

HMRC treats this as:

  • Dividend income if the borrower is a shareholder
  • Employment income if they are not

Either way, it becomes taxable.

This often comes as a shock, especially where the company also loses corporation tax relief and must still pay Class 1 NIC for employment-income write-offs.

4. The Benefit-in-Kind Trap: Interest-Free Loans Over £10,000

If at any point in the tax year a director owes the company over £10,000, the loan becomes a taxable benefit-in-kind, unless interest is charged at the official HMRC rate.

For 2025/26, the official rate is 2.25% (subject to change).

If the company charges no interest, or charges below that rate, HMRC calculates a BiK on the “cheap loan,” and:

  • The director pays income tax on the benefit
  • The company pays Class 1A NIC (13.8%)

Many directors exceed the £10,000 threshold without realising because personal spending has accumulated in the DLA.

5. The 30-Day Rule: When Repayments Don’t Count

Some directors repay the loan just before the 9-month deadline, only to borrow money again shortly after. HMRC calls this “bed and breakfasting” and created anti-avoidance rules to prevent it.

If a loan is repaid and:

  • A new loan is taken within 30 days, or
  • A dividend or salary is immediately used to repay the old loan

HMRC may treat the repayment as invalid for Section 455 purposes.

So even though the account shows £0 temporarily, the S455 charge can still apply.

6. Personal Expenses on the Company Account

This is where many directors face issues without realising:

  • Personal Amazon orders
  • Family meals
  • Supermarket shopping
  • Holidays
  • Personal direct debits
  • Cash withdrawals

If these are coded as business expenses, HMRC will disallow them and may:

  • Tax them as benefits
  • Treat them as salary (triggering PAYE and NIC)
  • Treat them as director’s loan withdrawals

Even where they are coded correctly to the DLA, repeated personal use can push the balance over £10,000 or leave it unpaid at year-end.

7. Why the Risk Is Higher in 2025/26

HMRC’s digital systems now cross-match:

  • Bank feeds from accounting software
  • Card transaction metadata
  • VAT submissions
  • Payroll filings
  • Dividend reporting
  • Information from online platforms

This means HMRC can more easily spot:

  • Round-sum payments
  • Personal spending patterns
  • Frequent withdrawals
  • Missing dividend paperwork
  • DLAs consistently overdrawn

Small companies are now far more visible to HMRC than they were even a few years ago.

8. How to Prevent Problems: Practical Steps

Keep the Director’s Loan Account Updated Monthly

Do not wait until year-end.

Never treat company money as personal cash

All withdrawals must be documented as:

  • Salary
  • Dividend
  • Loan
  • Reimbursement
  • Expense claim

Avoid personal spending on the company card

It creates record-keeping and tax risks even if repaid later.

Repay loans before the 9-month deadline

Don’t leave it to the final days — the timing rules are strict.

Charge interest if loans exceed £10,000

To avoid a benefit-in-kind charge.

Record dividends properly

You need:

  • Board minutes
  • Dividend vouchers
  • Evidence of sufficient company profits

Keep business and personal finances separate

This is the single best protection against unexpected tax.

Summary

Borrowing from your own company may feel harmless, but in practice it is one of the most common causes of unexpected tax bills for directors. The rules are complex, the deadlines are strict, and HMRC’s data-matching tools make it far easier to detect misclassified withdrawals.

The key is treating the company as a separate entity, maintaining clean records, and understanding the tax implications before taking money out.

Used properly, a director’s loan can be a flexible tool — but used casually, it quickly becomes an expensive mistake.

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