How does a director's loan account work?
A limited company's money is not the director's money, however small the company. Every pound that crosses between them has to be one of four things: salary through PAYE, a dividend properly declared, reimbursement of a business expense, or a loan. The loan account is where the fourth kind is tracked.
It runs in both directions. A director who puts personal money into the company at the start, or pays a company bill from their own card, is owed that money back: the account is in credit. A director who draws money out that is not salary or dividend owes it to the company: the account is overdrawn.
An overdrawn account is where the tax rules bite. If it is still overdrawn nine months and one day after the year end, the company pays a temporary tax charge on the balance at a rate on gov.uk, refunded once the loan is repaid. Larger overdrawn balances can also be a taxable benefit for the director, and interest-free loans above a threshold need reporting.