I'm wanting to add an interest component to a long term loan liability account. I'm talking to you about directors loan accounts what they are charging interest on them what amount of interest you can charge and some common pitfalls.Do companies need to charge interest if a director takes a loan? This would need to be a market rate of interest, and this interest charge is a deductible expense against corporation tax in the company. "Base Rate Loan" means a Revolving Credit Loan or a Term Loan that bears interest based on the Base Rate.