Legal and professional costs that a business incurs are allowable when they are incurred wholly and exclusively for the purposes of the trade.
Legal fees incurred in attempting to recover bad debts are deemed to be incurred for the purpose of the trade and are therefore considered to be allowable expenditure in establishing your business profit for the year.
In addition to being an allowable deduction in the accounts, as the debt relates to a specific customer, the legal fees incurred in respect of that debt recovery will be also be allowable as a deduction for tax purposes.
It should also be noted that where a bad debt relating to ordinary trade transactions with a specific customer is written off, that amount is also an allowable deduction. This contrasts with the rules for a general bad debt provision, which is not an allowable deduction for tax purposes.